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hormones</title> <meta name="description" content="Search results for: steroid hormones"> <meta name="keywords" content="steroid hormones"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="steroid hormones"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 236</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: steroid hormones</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">236</span> Effects of Conjugated Linoleic Acid (CLA) on Hormones and Factors Involved in Murine Ovulation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Leila%20Karshenas">Leila Karshenas</a>, <a href="https://publications.waset.org/abstracts/search?q=Hamidreza%20Khodaei"> Hamidreza Khodaei</a>, <a href="https://publications.waset.org/abstracts/search?q=Behnaz%20Mahdavi"> Behnaz Mahdavi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ovulation is a physiologic process with an inflammatory response that depends on a coordinated activity of gonadotropins and steroid hormones, as well as inflammatory mediators such as cytokines, prostaglandins, leptin, nitric oxide (NO), etc. Conjugated linoleic acid (CLA) is composed of polyunsaturated fatty acids (PUFA) found in dairy products, beef and lamb. There is strong evidence that dietary CLA affects mediators involved in ovulation. The aim of this study was to determine the effects of different doses of dietary CLA on systemic and local hormones and factors involved in ovulation. In this case-control study, 80 (50±2-day old) female mice were randomly divided into four groups (C as the controls and T1, T2 and T3 as the treatment groups). There were four replicates in each group and there were five mice in every replicate (20 mice, in total). The mice in the control group were fed with no CLA in their diet but the ones in the treatment group received 0.1, 0.3 and 0.5g/kg of CLA (replacing corn oil in the diet), respectively for 120 days. Later on, blood samples were obtained from the tails of animals that displayed estrus signs and estradiol (E2), progesterone (P4), LH, FSH, NO, leptin and TNFα were measured. Furthermore, the effects of CLA on the ovarian production of prostaglandins (PGs) and NO were investigated. The data were analyzed by SAS software.CLA significantly decreased serum levels of FSH (p<0.05), LH, estradiol, NO, leptin and TNFα (p<0.01). In addition, CLA decreased progesterone levels but this effect was statistically insignificant. The significantly negative effects of CLA were seen on the ovarian production of PGE2 and PGF2α (p<0.01).It seems that CLA may play an effective role in reducing the ovulation rate in mice as CLA adversely affected female reproduction and it had negative effects on systemic and local hormones involved in ovulation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=conjugated%20linoleic%20acid" title="conjugated linoleic acid">conjugated linoleic acid</a>, <a href="https://publications.waset.org/abstracts/search?q=nitric%20oxide" title=" nitric oxide"> nitric oxide</a>, <a href="https://publications.waset.org/abstracts/search?q=ovary" title=" ovary"> ovary</a>, <a href="https://publications.waset.org/abstracts/search?q=ovulation" title=" ovulation"> ovulation</a>, <a href="https://publications.waset.org/abstracts/search?q=prostaglandin" title=" prostaglandin"> prostaglandin</a>, <a href="https://publications.waset.org/abstracts/search?q=gonadotropin" title=" gonadotropin"> gonadotropin</a> </p> <a href="https://publications.waset.org/abstracts/12655/effects-of-conjugated-linoleic-acid-cla-on-hormones-and-factors-involved-in-murine-ovulation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/12655.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">301</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">235</span> Central Palmar Necrosis Following Steroid Injections for the Treatment of Carpal Tunnel Syndrome: A Case Report</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Ridwanul%20Hassan">M. Ridwanul Hassan</a>, <a href="https://publications.waset.org/abstracts/search?q=Samuel%20George"> Samuel George</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Aims: Steroid injections are commonly used as a diagnostic tool or an alternative to surgical management of carpal tunnel syndrome (CTS) and are generally safe. Ischaemia is a rare complication with very few cases reported in the literature. Methods: We report a case of a 50-year-old female that presented with a necrotic wound to her left palm one month after a steroid injection into the carpal tunnel. She had a 2-year history of CTS in her left hand that was treated with six previous steroid injections in primary care during this period. The wound evolved from a blister to a necrotic ulcer which led to a painful, hollow defect in the centre of her palm. She did not report any history of trauma, nor did she have any co-morbidities. Clinical photographs were taken. Results: On examination, she had a 0.5 cmx1 cm defect in the palm of her left hand down to aponeurosis. There was purulent discharge in the wound with surrounding erythema but no spreading cellulitis. She had full function of her fingers but was very tender on movements and at rest. She was admitted for intravenous antibiotics and underwent a debridement, washout, and carpal tunnel release the next day. The defect was packed to heal by secondary intention and has now fully healed one month following her operation. Conclusions: This is an extremely rare complication of steroid injections to the carpal tunnel and may have been avoided by earlier referral for surgery rather than treatment using multiple steroid injections. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hand%20surgery" title="hand surgery">hand surgery</a>, <a href="https://publications.waset.org/abstracts/search?q=complication" title=" complication"> complication</a>, <a href="https://publications.waset.org/abstracts/search?q=rare" title=" rare"> rare</a>, <a href="https://publications.waset.org/abstracts/search?q=carpal%20tunnel%20syndrome" title=" carpal tunnel syndrome"> carpal tunnel syndrome</a> </p> <a href="https://publications.waset.org/abstracts/152984/central-palmar-necrosis-following-steroid-injections-for-the-treatment-of-carpal-tunnel-syndrome-a-case-report" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/152984.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">112</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">234</span> Influence of Conjugated Linoleic Acid on Hormones of Axis of Female Reproduction System Involved in Ovulation Process </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hamidreza%20Khodaei">Hamidreza Khodaei</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20Daryabeigi%20Zand"> Ali Daryabeigi Zand</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ovulation is a physiologic process with an inflammatory response that depends on a coordinated activity of gonadotropins and steroid hormones, and inflammatory mediators such as cytokines, prostaglandins, leptin, nitric oxide (NO), etc. Conjugated linoleic acid (CLA) is composed of polyunsaturated fatty acids (PUFA) found in dairy products, beef, and lamb. There is strong evidence that dietary CLA affects mediators involved in ovulation. The objective of this study is to evaluate the impacts of various doses of dietary CLA on systemic and local hormones and parameters involved in ovulation. In this case-control research, 80 (50 ± 2-day old) female mice were randomly divided into 4 groups (C as control treatment and T1, T2 and T3 are considered as the treatment groups). There were four replicates in each group, and there were five mice in every replicate (20 mice, in total). The mice in the control group were fed with no CLA in their diet, but the ones in the treatment group received 0.1, 0.3 and 0.5g/kg of CLA (replacing corn oil in the diet), respectively for four months. After that, blood samples were obtained from the tails of animals that displayed estrus signs and estradiol (E2), progesterone (P4), LH, FSH, NO, leptin and TNFα were measured. In addition, the impacts of CLA on the ovarian production of prostaglandins (PGs) and NO were studied. The data were analyzed by SAS software. CLA considerably decreased serum levels of FSH (p < 0.05), LH, estradiol, NO, leptin and TNFα (p < 0.01). In addition, CLA decreased progesterone levels, but this effect was statistically not significant. The significantly adverse effects of CLA were observed in the ovarian production of PGE2 and PGF2α (p < 0.01). It seems that CLA may play an important role in reducing the ovulation rate in mice as CLA negatively affected female reproduction and it had adverse effects on systemic and local hormones involved in ovulation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=conjugated%20linoleic%20acid" title="conjugated linoleic acid">conjugated linoleic acid</a>, <a href="https://publications.waset.org/abstracts/search?q=nitric%20oxide" title=" nitric oxide"> nitric oxide</a>, <a href="https://publications.waset.org/abstracts/search?q=ovary" title=" ovary"> ovary</a>, <a href="https://publications.waset.org/abstracts/search?q=ovulation" title=" ovulation"> ovulation</a>, <a href="https://publications.waset.org/abstracts/search?q=prostaglandin" title=" prostaglandin"> prostaglandin</a>, <a href="https://publications.waset.org/abstracts/search?q=gonadotropin" title=" gonadotropin"> gonadotropin</a> </p> <a href="https://publications.waset.org/abstracts/75413/influence-of-conjugated-linoleic-acid-on-hormones-of-axis-of-female-reproduction-system-involved-in-ovulation-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/75413.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">212</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">233</span> Randomized, Controlled Blind Study Comparing Sacroiliac Intra-Articular Steroid Injection to Radiofrequency Denervation for Management of Sacroiliac Joint Pain</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ossama%20Salman">Ossama Salman</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background and objective: Sacroiliac joint pain is a common cause for chronic axial low back pain, with up to 20% prevalence rate. To date, no effective long-term treatment intervention has been embarked on yet. The aim of our study was to compare steroid block to radiofrequency ablation for SIJ pain conditions. Methods: A randomized, blind, study was conducted in 30 patients with sacroiliac joint pain. Fifteen patients received radiofrequency denervation of L4-5 primary dorsal rami and S1-3 lateral sacral branch, and 15 patients received steroid under fluoroscopy. Those in the steroid group who did not respond to steroid injections were offered to cross over to get radiofrequency ablation. Results: At 1-, 3- and 6-months post-intervention, 73%, 60% and 53% of patients, respectively, gained ≥ 50 % pain relief in the radiofrequency (RF) ablation group. In the steroid group, at one month post intervention follow up, only 20% gained ≥ 50 % pain relief, but failed to show any improvement at 3 months and 6 months follow up. Conclusions: Radiofrequency ablation at L4 and L5 primary dorsal rami and S1-3 lateral sacral branch may provide effective and longer pain relief compared to the classic intra-articular steroid injection, in properly selected patients with suspected sacroiliac joint pain. Larger studies are called for to confirm our results and lay out the optimal patient selection and treatment parameters for this poorly comprehended disorder. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=lateral%20branch%20denervation" title="lateral branch denervation">lateral branch denervation</a>, <a href="https://publications.waset.org/abstracts/search?q=LBD" title=" LBD"> LBD</a>, <a href="https://publications.waset.org/abstracts/search?q=radio%20frequency" title=" radio frequency"> radio frequency</a>, <a href="https://publications.waset.org/abstracts/search?q=RF" title=" RF"> RF</a>, <a href="https://publications.waset.org/abstracts/search?q=sacroiliac%20joint" title=" sacroiliac joint"> sacroiliac joint</a>, <a href="https://publications.waset.org/abstracts/search?q=SIJ" title=" SIJ"> SIJ</a>, <a href="https://publications.waset.org/abstracts/search?q=visual%20analogue%20scale" title=" visual analogue scale"> visual analogue scale</a>, <a href="https://publications.waset.org/abstracts/search?q=VAS" title=" VAS"> VAS</a> </p> <a href="https://publications.waset.org/abstracts/61619/randomized-controlled-blind-study-comparing-sacroiliac-intra-articular-steroid-injection-to-radiofrequency-denervation-for-management-of-sacroiliac-joint-pain" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/61619.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">219</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">232</span> Ovarian Hormones and Antioxidants Biomarkers in Dromedary Camels Synchronized with Controlled Intravaginal Drug Release/Ovsynch GPG Program during Breeding Season</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Heba%20Hozyen">Heba Hozyen</a>, <a href="https://publications.waset.org/abstracts/search?q=Ragab%20Mohamed"> Ragab Mohamed</a>, <a href="https://publications.waset.org/abstracts/search?q=Amal%20Abd%20El%20Hameed"> Amal Abd El Hameed</a>, <a href="https://publications.waset.org/abstracts/search?q=Amal%20Abo%20El-Maaty"> Amal Abo El-Maaty</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study aimed to investigate the effect of CIDR and ovsynch (Gonadotropin-prostaglandine-gonadotropin GPG) protocols for synchronization of follicular waves of dromedary camels on ovarian hormones, oxidative stress and conception during breeding season. Twelve dark colored dromedary camels were divided into two equal groups. The first group was subjected to CIDR insertion for 7 days and blood samples were collected each other day from the day of CIDR insertion (day 0) till day 21. The other group was subjected to GPG system (Ovsynch) and blood samples were collected daily for 11 days. Progesterone (P4) and estradiol were assayed using commercial ELISA diagnostic EIA kits. Catalase (CAT), total antioxidants capacity (TAC), glutathione reduced (GHD), lipid peroxide product (malondialdehyde, MDA) and nitric oxide (NO) were measured colorimetrically using spectrophotometer. Results revealed that CIDR treated camels had significantly high P4 (P= 0.0001), estradiol (P= 0.0001), CAT (P= 0.034), NO (P= 0.016) and TAC (P= 0.04) but significantly low MDA (P= 0.001) and GHD (P= 0.003) compared to GPG treated ones. Camels inserted with CIDR had higher conception rate (66.7%) compared to those treated with GPG (33%). In conclusion, camels treated with CIDR had higher hormonal response and antioxidant capacity than those synchronized with GPG which positively reflected on their conception rate. The better response of camels to CIDR and the higher conception compared to GPG protocol recommends its use for future reproductive management in camels. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antioxidants" title="antioxidants">antioxidants</a>, <a href="https://publications.waset.org/abstracts/search?q=camel" title=" camel"> camel</a>, <a href="https://publications.waset.org/abstracts/search?q=CIDR" title=" CIDR"> CIDR</a>, <a href="https://publications.waset.org/abstracts/search?q=season" title=" season"> season</a>, <a href="https://publications.waset.org/abstracts/search?q=steroid%20hormones" title=" steroid hormones"> steroid hormones</a> </p> <a href="https://publications.waset.org/abstracts/68184/ovarian-hormones-and-antioxidants-biomarkers-in-dromedary-camels-synchronized-with-controlled-intravaginal-drug-releaseovsynch-gpg-program-during-breeding-season" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/68184.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">290</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">231</span> Microbiological Activity and Molecular Docking Study of Selected Steroid Derivatives of Biomedical Importance</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Milica%20Karadzic">Milica Karadzic</a>, <a href="https://publications.waset.org/abstracts/search?q=Lidija%20Jevric"> Lidija Jevric</a>, <a href="https://publications.waset.org/abstracts/search?q=Sanja%20Podunavac-Kuzmanovic"> Sanja Podunavac-Kuzmanovic</a>, <a href="https://publications.waset.org/abstracts/search?q=Strahinja%20Kovacevic"> Strahinja Kovacevic</a>, <a href="https://publications.waset.org/abstracts/search?q=Sinisa%20Markov"> Sinisa Markov</a>, <a href="https://publications.waset.org/abstracts/search?q=Aleksandar%20Okljesa"> Aleksandar Okljesa</a>, <a href="https://publications.waset.org/abstracts/search?q=Andrea%20Nikolic"> Andrea Nikolic</a>, <a href="https://publications.waset.org/abstracts/search?q=Marija%20Sakac"> Marija Sakac</a>, <a href="https://publications.waset.org/abstracts/search?q=Katarina%20Penov%20Gasi"> Katarina Penov Gasi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study considered the microbiological activity determination and molecular docking study for selected steroid derivatives of biomedical importance. Minimal inhibitory concentration (MIC) was determined for steroid derivatives against Staphylococcus aureus using macrodilution method. Some of the investigated steroid derivatives express bacteriostatic effect against Staphylococcus aureus. Molecular docking approaches are the most widely used techniques for predicting the binding mode of a ligand. Molecular docking study was done for steroid derivatives for androgen receptor negative prostate cancer cell line (PC-3) toward Human Cytochrome P450 CYP17A1. The molecules that had the smallest experimental IC50 values confirmed their ability to dock into active place using suitable molecular docking procedure. The binding disposition of those molecules was thoroughly investigated. Microbiological analysis and molecular docking study were conducted with aim to additionally characterize selected steroid derivatives for future investigation regarding their biological activity and to estimate the binding-affinities of investigated derivatives. This article is based upon work from COST Action (TD1305), supported by COST (European Cooperation and Science and Technology). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=binding%20affinity" title="binding affinity">binding affinity</a>, <a href="https://publications.waset.org/abstracts/search?q=minimal%20inhibitory%20concentration" title=" minimal inhibitory concentration"> minimal inhibitory concentration</a>, <a href="https://publications.waset.org/abstracts/search?q=molecular%20docking" title=" molecular docking"> molecular docking</a>, <a href="https://publications.waset.org/abstracts/search?q=pc-3%20cell%20line" title=" pc-3 cell line"> pc-3 cell line</a>, <a href="https://publications.waset.org/abstracts/search?q=staphylococcus%20aureus" title=" staphylococcus aureus"> staphylococcus aureus</a>, <a href="https://publications.waset.org/abstracts/search?q=steroids" title=" steroids"> steroids</a> </p> <a href="https://publications.waset.org/abstracts/60204/microbiological-activity-and-molecular-docking-study-of-selected-steroid-derivatives-of-biomedical-importance" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/60204.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">365</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">230</span> Sense Environmental Hormones in Elementary School Teachers and Their in Service Learning Motivation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fu-Chi%20Chuang">Fu-Chi Chuang</a>, <a href="https://publications.waset.org/abstracts/search?q=Yu-Liang"> Yu-Liang</a>, <a href="https://publications.waset.org/abstracts/search?q=Chang"> Chang</a>, <a href="https://publications.waset.org/abstracts/search?q=Wen-Der%20Wang"> Wen-Der Wang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Our environment has been contaminated by many artificial chemicals, such as plastics, pesticides. Many of them have hormone-like activity and are classified as 'environmental hormone (also named endocrine disruptors)'. These chemicals interfere with or mimic hormones have adverse effects that persist into adulthood. Environmental education is an important way to teach students to become engaged in real-world issues that transcend classroom walls. Elementary education is the first stage to perform environmental education and it is an important component to help students develop adequate environmental knowledge, attitudes, and behavior. However, elementary teachers' knowledge plays a critical role in this mission. Therefore, we use a questionnaire to survey the knowledge of environmental hormone of elementary school teachers and their learning motivation of the environmental hormone-regarding knowledge. We collected 218 questionnaires from Taiwanese elementary teachers and the results indicate around 73% of elementary teachers do not have enough knowledge about environmental hormones. Our results also reveal the in-service elementary teachers’ learning motivation of environmental hormones knowledge is positively enhanced once they realized their insufficient cognitive ability of environmental hormones. We believe our study will provide the powerful reference for Ministry of Education to set up the policy of environmental education to enrich all citizens sufficient knowledge of the effects of the environmental hormone on organisms, and further to enhance our correct environmental behaviors. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=elementary%20teacher" title="elementary teacher">elementary teacher</a>, <a href="https://publications.waset.org/abstracts/search?q=environmental%20hormones" title=" environmental hormones"> environmental hormones</a>, <a href="https://publications.waset.org/abstracts/search?q=learning%20motivation" title=" learning motivation"> learning motivation</a>, <a href="https://publications.waset.org/abstracts/search?q=questionnaire" title=" questionnaire"> questionnaire</a> </p> <a href="https://publications.waset.org/abstracts/104093/sense-environmental-hormones-in-elementary-school-teachers-and-their-in-service-learning-motivation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/104093.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">313</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">229</span> Content Analysis and Attitude of Thai Students towards Thai Series “Hormones: Season 2”</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Siriporn%20Meenanan">Siriporn Meenanan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The objective of this study is to investigate the attitude of Thai students towards the Thai series "Hormones the Series Season 2". This study was conducted in the quantitative research, and the questionnaires were used to collect data from 400 people of the sample group. Descriptive statistics were used in data analysis. The findings reveal that most participants have positive comments regarding the series. They strongly agreed that the series reflects on the way of life and problems of teenagers in Thailand. Hence, the participants believe that if adults have a chance to watch the series, they will have the better understanding of the teenagers. In addition, the participants also agreed that the contents of the play are appropriate and satisfiable as the contents of “Hormones the Series Season 2” will raise awareness among the teens and use it as a guide to prevent problems that might happen during their teenage life. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=content%20analysis" title="content analysis">content analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=attitude" title=" attitude"> attitude</a>, <a href="https://publications.waset.org/abstracts/search?q=Thai%20series" title=" Thai series"> Thai series</a>, <a href="https://publications.waset.org/abstracts/search?q=hormones%20the%20Series" title=" hormones the Series"> hormones the Series</a> </p> <a href="https://publications.waset.org/abstracts/39934/content-analysis-and-attitude-of-thai-students-towards-thai-series-hormones-season-2" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/39934.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">229</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">228</span> Effect of Organic Zinc in Supplement Diet on Some Reproryductive Hormones and Fertility in Laboratory Mice</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Azade%20Sedigh">Azade Sedigh</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehrdad%20Modaresi"> Mehrdad Modaresi</a>, <a href="https://publications.waset.org/abstracts/search?q=Akbar%20Pirestani"> Akbar Pirestani </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Appropriate nutrition is necessary today for desire reproduction and profitable livestock industry. Minerals including zinc element are from nutritional factors. Studies show that zinc plays an important role in reproduction process and secretion of reproductive hormones. This study was carried out to determine the effects of organic zinc on some reproductive hormones, fertility of male mice. The study was done as completely randomized design with one control and six treatment groups. Seventy male mature mice were kept for 35 days to adapt to environment and then divided in seven groups with ten replications. Samples received zinc (organic) daily in 50,100, and 150 ppm doses of each type for 35 days. At the end, blood samples were taken to measure LH, FSH, and testosterone hormones. Meanwhile, fertility rates were measured. Results were analyzed using one way ANOVA and means were compared using Duncan multiple ranges test at 5% probability level. According to results, LH concentration of all groups except 50 ppm was increased significantly (p<0.05). FSH amount was increased significantly (p<0.05) in 100 ppm mineral group and reduced in 50 ppm mineral but was not changed in other groups. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=organic%20supplements" title="organic supplements">organic supplements</a>, <a href="https://publications.waset.org/abstracts/search?q=zinc" title=" zinc"> zinc</a>, <a href="https://publications.waset.org/abstracts/search?q=reproductive%20hormones" title=" reproductive hormones"> reproductive hormones</a>, <a href="https://publications.waset.org/abstracts/search?q=fertility" title=" fertility"> fertility</a> </p> <a href="https://publications.waset.org/abstracts/17846/effect-of-organic-zinc-in-supplement-diet-on-some-reproryductive-hormones-and-fertility-in-laboratory-mice" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17846.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">468</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">227</span> Heterocyclic Ring Extension of Estrone: Synthesis and Cytotoxicity of Fused Pyrin, Pyrimidine and Thiazole Derivatives</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rafat%20M.%20Mohareb">Rafat M. Mohareb</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Several D-ring alkylated estrone analogues display exceptionally high affinity for estrogen receptors. In particular, compounds in which an E-ring is formed are known to be involved in the inhibition of steroidogenic enzymes. Such compounds also have an effect on steroid dehydrogenase activity and the ability to inhibit the detrimental action of the steroid sulfatase enzyme. Generally, E-ring extended steroids have been accessed by modification of the C17-ketone in the D-ring by either arylimine or oximino formation, addition of a carbon nucleophile or hydrazone formation. Other approaches have included ketone reduction, silyl enol ether formation or ring-closing metathesis (giving five- or six-membered E-rings). Chemical modification of the steroid D-ring provides a way to alter the functional groups, sizes and stereochemistry of the D-ring, and numerous structure-activity relationships have been established by such synthetic alterations. Steroids bearing heterocycles fused to the D-ring of the steroid nucleus have been of pharmaceutical interest. In the present paper, we report on the efficient synthesis of estrone possessing pyran, pyrimidine and thiazole ring systems. This study focused on the synthesis and biochemical evaluation of newly synthesized heterocyclic compounds which were then subjected through inhibitory evaluations towards human cancer and normal cell lines. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=estrone" title="estrone">estrone</a>, <a href="https://publications.waset.org/abstracts/search?q=heterocyclization" title=" heterocyclization"> heterocyclization</a>, <a href="https://publications.waset.org/abstracts/search?q=cytotoxicity" title=" cytotoxicity"> cytotoxicity</a>, <a href="https://publications.waset.org/abstracts/search?q=biomedicine" title=" biomedicine"> biomedicine</a> </p> <a href="https://publications.waset.org/abstracts/1735/heterocyclic-ring-extension-of-estrone-synthesis-and-cytotoxicity-of-fused-pyrin-pyrimidine-and-thiazole-derivatives" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/1735.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">296</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">226</span> Ophthalmic Self-Medication Practices and Associated Factors among Adult Ophthalmic Patients</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sarah%20Saad%20Alamer">Sarah Saad Alamer</a>, <a href="https://publications.waset.org/abstracts/search?q=Shujon%20Mohammed%20Alazzam"> Shujon Mohammed Alazzam</a>, <a href="https://publications.waset.org/abstracts/search?q=Amjad%20Khater%20Alanazi"> Amjad Khater Alanazi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Ahmed%20Sankari"> Mohamed Ahmed Sankari</a>, <a href="https://publications.waset.org/abstracts/search?q=Jana%20Sameer%20Sendy"> Jana Sameer Sendy</a>, <a href="https://publications.waset.org/abstracts/search?q=Saleh%20Al-Khaldi"> Saleh Al-Khaldi</a>, <a href="https://publications.waset.org/abstracts/search?q=Khaled%20Allam"> Khaled Allam</a>, <a href="https://publications.waset.org/abstracts/search?q=Amani%20Badawi"> Amani Badawi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background: Self-medication is defined as the selection of medicines by individuals to treat self-diagnosed. There are a lot of concerns about the safety of long-term use of nonprescription ophthalmic drugs, which may lead to a variety of serious ocular complications. Topical steroids can produce severe eye-threatening complications, including the elevation of intraocular pressure (IOP) with possible development of glaucoma and infrequent optic nerve damage. In recent times, many OTC ophthalmic preparations have been possible without a prescription. Objective: In our study, we aimed to determine the prevalence of self-medication ocular topical steroid practice and associated factors among adult ophthalmic patients attending King Saud medical city. Methods: This study was conducted as a cross-sectional study, targeting participants aged 18 years old or above who had used topical steroids eye drops to determine the prevalence of self-medication ocular topical steroid practice and associated factors among adult patients attending ophthalmology clinic in King Saud Medical City (KSMC) in the central region. Results: A total of 308 responses, 92(29.8%) were using ocular topical, 58(18.8%) with prescription, 5(1.6%) without prescription, 29(9.4%) with and without prescription while 216(70.1%) did not use it. The frequency of using ocular topical steroids without a prescription among participants was 11(12%) once and 33 (35%) many times. 26(28.3%) were having complication, mostly 11(12.4%) eye infection, 8(9%) Glaucoma, 6 (6.7%) Cataracts. Reasons for self-medication ocular topical steroid practice among participants were 14 (15.2%) repeated symptoms, 11(15.2%) had heard an advice from a friend, 11 (15.2%) thought they had enough knowledge. Conclusion: Our study reveals that, even though detecting a high level of knowledge and acceptable practices and attitudes among participants, the incidence of self-medication with steroid eye drops was observed. This practice is mainly due to participants having repeated symptoms and thinking they have enough knowledge. Increasing the education level of patients on self-medication steroid eye drops practice and it is associated complications would help reduce the incidence of self-medication steroid eye drops practice. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=self-medication" title="self-medication">self-medication</a>, <a href="https://publications.waset.org/abstracts/search?q=ophthalmic%20medicine" title=" ophthalmic medicine"> ophthalmic medicine</a>, <a href="https://publications.waset.org/abstracts/search?q=steroid%20eye%20drop" title=" steroid eye drop"> steroid eye drop</a>, <a href="https://publications.waset.org/abstracts/search?q=over%20the%20counter" title=" over the counter"> over the counter</a> </p> <a href="https://publications.waset.org/abstracts/163122/ophthalmic-self-medication-practices-and-associated-factors-among-adult-ophthalmic-patients" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/163122.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">90</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">225</span> Bioproduction of Phytohormones by Liquid Fermentation Using a Mexican Strain of Botryodiplodia theobromae</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Laredo%20Alcal%C3%A1%20Elan%20I%C3%B1aky">Laredo Alcalá Elan Iñaky</a>, <a href="https://publications.waset.org/abstracts/search?q=Hernandez%20Castillo%20Daniel"> Hernandez Castillo Daniel</a>, <a href="https://publications.waset.org/abstracts/search?q=Martinez%20Hernandez%20Jos%C3%A9%20Luis"> Martinez Hernandez José Luis</a>, <a href="https://publications.waset.org/abstracts/search?q=Arredondo%20Valdes%20Roberto"> Arredondo Valdes Roberto</a>, <a href="https://publications.waset.org/abstracts/search?q=Gonzalez%20Gallegos%20Esmeralda"> Gonzalez Gallegos Esmeralda</a>, <a href="https://publications.waset.org/abstracts/search?q=Anguiano%20Cabello%20Julia%20Cecilia"> Anguiano Cabello Julia Cecilia</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Plant hormones are a group of molecules that control different processes ranging from the growth and development of the plant until their response to biotic and abiotic stresses. In this study, the capacity of production of various phytohormones was evaluated from a strain of Botryodiplodia theobromae by liquid fermentation system using the modified Mierch medium added with a hydrolyzate compound of mead all in a reactor without agitation at 28 °C for 15 days. Quantification of the metabolites was performed using high performance liquid chromatography techniques. The results showed that a microbial broth with at least five different types of plant hormones was obtained: gibberellic acid, zeatin, kinetin, indoleacetic acid and jasmonic acid, the last one was higher than the others metabolites produced. The production of such hormones using a single type of microorganism could be in the future a great alternative to reduce production costs and similarly reduce the use of synthetic chemicals. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biosystem" title="biosystem">biosystem</a>, <a href="https://publications.waset.org/abstracts/search?q=plant%20hormones" title=" plant hormones"> plant hormones</a>, <a href="https://publications.waset.org/abstracts/search?q=Botryodiplodia%20theobromae" title=" Botryodiplodia theobromae"> Botryodiplodia theobromae</a>, <a href="https://publications.waset.org/abstracts/search?q=fermentation" title=" fermentation"> fermentation</a> </p> <a href="https://publications.waset.org/abstracts/43134/bioproduction-of-phytohormones-by-liquid-fermentation-using-a-mexican-strain-of-botryodiplodia-theobromae" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/43134.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">403</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">224</span> Quantitative Detection of the Conformational Transitions between Open and Closed Forms of Cytochrome P450 Oxidoreductase (CYPOR) at the Membrane Surface in Different Functional States</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sara%20Arafeh">Sara Arafeh</a>, <a href="https://publications.waset.org/abstracts/search?q=Kovriguine%20Evguine"> Kovriguine Evguine</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Cytochromes P450 are enzymes that require a supply of electrons to catalyze the synthesis of steroid hormones, fatty acids, and prostaglandin hormone. Cytochrome P450 Oxidoreductase (CYPOR), a membrane bound enzyme, provides these electrons in its open conformation. CYPOR has two cytosolic domains (FAD domain and FMN domain) and an N-terminal in the membrane. In its open conformation, electrons flow from NADPH, FAD, and finally to FMN where cytochrome P450 picks up these electrons. In the closed conformation, cytochrome P450 does not bind to the FMN domain to take the electrons. It was found that when the cytosolic domains are isolated, CYPOR could not bind to cytochrome P450. This suggested that the membrane environment is important for CYPOR function. This project takes the initiative to better understand the dynamics of CYPOR in its full length. Here, we determine the distance between specific sites in the FAD and FMN binding domains in CYPOR by Forster Resonance Energy Transfer (FRET) and Ultrafast TA spectroscopy with and without NADPH. The approach to determine these distances will rely on labeling these sites with red and infrared fluorophores. Mimic membrane attachment is done by inserting CYPOR in lipid nanodiscs. By determining the distances between the donor-acceptor sites in these domains, we can observe the open/closed conformations upon reducing CYPOR in the presence and absence of cytochrome P450. Such study is important to better understand CYPOR mechanism of action in various endosomal membranes including hepatic CYPOR which is vital in plasma cholesterol homeostasis. By investigating the conformational cycles of CYPOR, we can synthesize drugs that would be more efficient in affecting the steroid hormonal levels and metabolism of toxins catalyzed by Cytochrome P450. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=conformational%20cycle%20of%20CYPOR" title="conformational cycle of CYPOR">conformational cycle of CYPOR</a>, <a href="https://publications.waset.org/abstracts/search?q=cytochrome%20P450" title=" cytochrome P450"> cytochrome P450</a>, <a href="https://publications.waset.org/abstracts/search?q=cytochrome%20P450%20oxidoreductase" title=" cytochrome P450 oxidoreductase"> cytochrome P450 oxidoreductase</a>, <a href="https://publications.waset.org/abstracts/search?q=FAD%20domain" title=" FAD domain"> FAD domain</a>, <a href="https://publications.waset.org/abstracts/search?q=FMN%20domain" title=" FMN domain"> FMN domain</a>, <a href="https://publications.waset.org/abstracts/search?q=FRET" title=" FRET"> FRET</a>, <a href="https://publications.waset.org/abstracts/search?q=Ultrafast%20TA%20Spectroscopy" title=" Ultrafast TA Spectroscopy"> Ultrafast TA Spectroscopy</a> </p> <a href="https://publications.waset.org/abstracts/63085/quantitative-detection-of-the-conformational-transitions-between-open-and-closed-forms-of-cytochrome-p450-oxidoreductase-cypor-at-the-membrane-surface-in-different-functional-states" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/63085.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">279</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">223</span> Rapid Proliferation of Tissue Culture Using of Olive (Olea Europea L.) cv.Zard</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Majid%20Gharaipour%20Abbasabad">Majid Gharaipour Abbasabad</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This research is studying the effects that various densities of Zeatin, and BA hormones may have on the scale of transformation of plant nodes to new shoots, among seedlings produced by seed germination, and also surveys the amount of produced shoots and their lengths, inside the specific Olive seed lab medium (OM). It is also concerned with the effects that various densities of IBA hormone, and inoculating the shoots with Agrobacterium Rhizogenez A4 can have on shoots' root production. This is a totally random research, and each attendance group has had three occurrences, and ten samples per a hectare. The average amounts have been compared using Duncan's test method, which was done in 5% level. The results indicated that the highest rate of transformation of micro samples to shoots happened in the seed germination environments, containing Zetain with 5 mg, and also 15 mg per a liter densities. (respectively, 95% and 94%), while the highest rate of plants' stem production ,in micro samples, happened in the lab medium environments with 5mg per a liter Zetain density (4.5). In lab medium environments with 15 mg Zetain per liter, a decrease was observed in the number of produced stems (3.88). According to the produced stems' lenght, the longest stem length was observed in environments with 5 mg and also 15 mg per a liter Zetain, and 25 mg per a liter BA densities (respectively, 8.45 cm, 45.66 cm, 8.53 cm). Meanwhile, the lowest amount of transformation of micro samples to shoots, the lowest number of produced shoots, and the shortest shoots were observed in the environments without any hormones (respectively, 3.32 cm, 1.13, 19.66%). The results of root production in Olive indicated that attendance groups which were exposed to different hormones did not vary, and Agrobacterium Rhizogenez A4 had no effect on them, as well. The lowest root's growth rate (22%) happened in environments without any hormones and also, in environment with Agrobacterium Rhizogenez A4 (19.66%). The largest number of roots was observed in the environments, containing Agrobacterium Rhizogenez A4 plus IBA (10 mg/l) and Agrobacterium Rhizogenez A4 plus IBA (10 mg/l), (respectively, 8.46 and 8.70), which had a significant difference with environments merely containing 10 mg and 20 mg of IBA per a litre (respectively, 3.06 and 3.2). So it can be concluded that even though Agrobacterium Rhizogenez A4 had no impact on root's growth among shoots, it had an impact on the number of produced roots. It should be noted that even when the environment contained merely Agrobacterium Rhizogenez A4 without any hormones, only (1.16) roots were produced, which is significantly different from the attendance group with hormones (1.06). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=olive-effect%20of%20hormones-germination%20of%20seed" title="olive-effect of hormones-germination of seed">olive-effect of hormones-germination of seed</a>, <a href="https://publications.waset.org/abstracts/search?q=densities%20of%20zeatin" title=" densities of zeatin"> densities of zeatin</a>, <a href="https://publications.waset.org/abstracts/search?q=BA%20hormones" title=" BA hormones"> BA hormones</a>, <a href="https://publications.waset.org/abstracts/search?q=agriculture" title=" agriculture"> agriculture</a> </p> <a href="https://publications.waset.org/abstracts/14822/rapid-proliferation-of-tissue-culture-using-of-olive-olea-europea-l-cvzard" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/14822.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">292</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">222</span> The Pharmacology and Physiology of Steroid Oral Contraceptives</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ragy%20Raafat%20Gaber%20Attaalla">Ragy Raafat Gaber Attaalla</a> </p> <p class="card-text"><strong>Abstract:</strong></p> PIP: This review, based on 2 large-scale studies, discusses the pharmacology and physiology of oral steroid contraceptives (OCs). The pharmacological distinction between synthetic and naturally occurring steroids centers on changes in biological activity dependent on compound formulation and an individual's metabolism. OC mechanism of action is explained as the main prevention of ovulation by interference with gonadotropin-releasing hormone. Since some 52 metabolic alterations have been reported in OC users, these phenomena are dealt with in 3 categories: 1) effects on the primary target organs of the female reproductive tract (ovary, myometrium, endometrium, cervix, vagina, breasts, and hypothalamus), 2) general metabolic effects (serum proteins, carbohydrate metabolism, lipid metabolism, water and electrolyte metabolism, body weight, tryptophan metabolism, and vitamins and minerals), and 3) effects on other organ systems (liver, central nervous system, skin, genitourinary, gastrointestinal tract, eye, immune phenomena, and effect on subsequent fertility). The choice of the proper OC formulation and use of OCs by adolescents are discussed. Assessment of OC safety, contraindications, and patient monitoring are provided. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=steroid%20oral%20contraceptives" title="steroid oral contraceptives">steroid oral contraceptives</a>, <a href="https://publications.waset.org/abstracts/search?q=ovulation" title=" ovulation"> ovulation</a>, <a href="https://publications.waset.org/abstracts/search?q=female%20reproductive%20tract" title=" female reproductive tract"> female reproductive tract</a>, <a href="https://publications.waset.org/abstracts/search?q=metabolic%20effects" title=" metabolic effects"> metabolic effects</a> </p> <a href="https://publications.waset.org/abstracts/160813/the-pharmacology-and-physiology-of-steroid-oral-contraceptives" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/160813.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">96</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">221</span> Effects of PAHs on Blood Thyroidal Hormones of Liza klunzingeri in the Northern Part of Hormuz Strait (Persian Gulf)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fateme%20Afkhami">Fateme Afkhami</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohsen%20Ehsanpour"> Mohsen Ehsanpour</a>, <a href="https://publications.waset.org/abstracts/search?q=Maryam%20Ehsanpour"> Maryam Ehsanpour</a>, <a href="https://publications.waset.org/abstracts/search?q=Majid%20Afkhami"> Majid Afkhami</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study was conducted to determine the effects of polycyclic aromatic hydrocarbons (PAHs) on thyroidal hormones of Liza klunzingeri and to monitor marine pollution from northern part of Hormuz strait (Persian Gulf). Results showed the highest total PAHs levels (268.56 µg/kg) were in the fish samples and the lowest are obtained from water samples (3.12 µg/kg). Also, highest of PAHs levels in fish, sediment and water were found in St3. There was a positive correlation between T3 and T4, with PAHs results. T4 had a significant positive correlation (P<0.05). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=PAHs" title="PAHs">PAHs</a>, <a href="https://publications.waset.org/abstracts/search?q=thyroidal%20hormones" title=" thyroidal hormones"> thyroidal hormones</a>, <a href="https://publications.waset.org/abstracts/search?q=Liza%20klunzingeri" title=" Liza klunzingeri"> Liza klunzingeri</a>, <a href="https://publications.waset.org/abstracts/search?q=Hormuz%20Strait" title=" Hormuz Strait"> Hormuz Strait</a>, <a href="https://publications.waset.org/abstracts/search?q=Persian%20Gulf" title=" Persian Gulf"> Persian Gulf</a> </p> <a href="https://publications.waset.org/abstracts/14334/effects-of-pahs-on-blood-thyroidal-hormones-of-liza-klunzingeri-in-the-northern-part-of-hormuz-strait-persian-gulf" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/14334.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">703</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">220</span> Nafion Multiwalled Carbon Nano Tubes Composite Film Modified Glassy Carbon Sensor for the Voltammetric Estimation of Dianabol Steroid in Pharmaceuticals and Biological Fluids</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nouf%20M.%20Al-Ourfi">Nouf M. Al-Ourfi</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20S.%20Bashammakh"> A. S. Bashammakh</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20S.%20El-Shahawi"> M. S. El-Shahawi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The redox behavior of dianabol steroid (DS) on Nafion Multiwalled Carbon nano -tubes (MWCNT) composite film modified glassy carbon electrode (GCE) in various buffer solutions was studied using cyclic voltammetry (CV) and differential pulse- adsorptive cathodic stripping voltammetry (DP-CSV) and successfully compared with the results at non modified bare GCE. The Nafion-MWCNT composite film modified GCE exhibited the best electrochemical response among the two electrodes for the electro reduction of DS that was inferred from the EIS, CV and DP-CSV. The modified sensor showed a sensitive, stable and linear response in the concentration range of 5 – 100 nM with a detection limit of 0.08 nM. The selectivity of the proposed sensor was assessed in the presence of high concentration of major interfering species. The analytical application of the sensor for the quantification of DS in pharmaceutical formulations and biological fluids (urine) was determined and the results demonstrated acceptable recovery and RSD of 5%. Statistical treatment of the results of the proposed method revealed no significant differences in the accuracy and precision. The relative standard deviations for five measurements of 50 and 300 ng mL−1 of DS were 3.9 % and 1.0 %, respectively. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dianabol%20steroid" title="dianabol steroid">dianabol steroid</a>, <a href="https://publications.waset.org/abstracts/search?q=determination" title=" determination"> determination</a>, <a href="https://publications.waset.org/abstracts/search?q=modified%20GCE" title=" modified GCE"> modified GCE</a>, <a href="https://publications.waset.org/abstracts/search?q=urine" title=" urine"> urine</a> </p> <a href="https://publications.waset.org/abstracts/43137/nafion-multiwalled-carbon-nano-tubes-composite-film-modified-glassy-carbon-sensor-for-the-voltammetric-estimation-of-dianabol-steroid-in-pharmaceuticals-and-biological-fluids" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/43137.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">284</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">219</span> Chromatographic Lipophilicity Determination of Newly Synthesized Steroid Derivatives for Further Biological Analysis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Milica%20Z.%20Karadzic">Milica Z. Karadzic</a>, <a href="https://publications.waset.org/abstracts/search?q=Lidija%20R.%20Jevric"> Lidija R. Jevric</a>, <a href="https://publications.waset.org/abstracts/search?q=Sanja%20Podunavac-Kuzmanovic"> Sanja Podunavac-Kuzmanovic</a>, <a href="https://publications.waset.org/abstracts/search?q=Strahinja%20Z.%20Kovacevic"> Strahinja Z. Kovacevic</a>, <a href="https://publications.waset.org/abstracts/search?q=Anamarija%20I.%20Mandic"> Anamarija I. Mandic</a>, <a href="https://publications.waset.org/abstracts/search?q=Katarina%20Penov-Gasi"> Katarina Penov-Gasi</a>, <a href="https://publications.waset.org/abstracts/search?q=Andrea%20R.%20Nikolic"> Andrea R. Nikolic</a>, <a href="https://publications.waset.org/abstracts/search?q=Aleksandar%20M.%20Okljesa"> Aleksandar M. Okljesa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, a set of 29 newly synthesized steroid derivatives were investigated using reversed-phase high-performance liquid chromatography (RP-HPLC) as a first step in preselection of drug candidates. This analysis presents an experimental determination of chromatographic lipophilicity, and it was conducted to obtain physicochemical characterization of these molecules. As the most widely used bonded phases in RP-HPLC, octadecyl (C18) and octyl (C8) were used. Binary mixtures of water and acetonitrile or methanol were used as mobile phases. Obtained results were expressed as retention factor values logk and they were correlated with logP values. The results showed that both columns provide good estimations of the chromatographic lipophilicity of the molecules included in this study. This analysis was conducted in order to characterize newly synthesized steroid derivatives for further investigation regarding their antiproliferative and antimicrobial activity. This article is based upon work from COST Action (CM1306), supported by COST (European Cooperation in Science and Technology). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antiproliferative%20activity" title="antiproliferative activity">antiproliferative activity</a>, <a href="https://publications.waset.org/abstracts/search?q=chromatographic%20lipophilicity" title=" chromatographic lipophilicity"> chromatographic lipophilicity</a>, <a href="https://publications.waset.org/abstracts/search?q=liquid%20chromatography" title=" liquid chromatography"> liquid chromatography</a>, <a href="https://publications.waset.org/abstracts/search?q=steroids" title=" steroids"> steroids</a> </p> <a href="https://publications.waset.org/abstracts/49454/chromatographic-lipophilicity-determination-of-newly-synthesized-steroid-derivatives-for-further-biological-analysis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/49454.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">290</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">218</span> The Transcription Factor HNF4a: A Key Player in Haematological Disorders</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tareg%20Belali">Tareg Belali</a>, <a href="https://publications.waset.org/abstracts/search?q=Mosleh%20Abomughaid"> Mosleh Abomughaid</a>, <a href="https://publications.waset.org/abstracts/search?q=Muhanad%20Alhujaily"> Muhanad Alhujaily</a> </p> <p class="card-text"><strong>Abstract:</strong></p> HNF4a is one of the steroid hormone receptor family of transcription factors with roles in the development of the liver and the regulation of several critical metabolic pathways, such as glycolysis, drug metabolism, and apolipoproteins and blood coagulation. The transcriptional potency of HNF4a is well known due to its involvement in diabetes and other metabolic diseases. However, recently HNF4a has been discovered to be closely associated with several haematological disorders, mainly because of genetic mutations, drugs, and hepatic disorders. We review HNF4a structure and function and its role in haematological disorders. We discuss possible good therapies that are based on targeting HNF4a. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hepatocyte%20nuclear%20factor%204%20alpha" title="hepatocyte nuclear factor 4 alpha">hepatocyte nuclear factor 4 alpha</a>, <a href="https://publications.waset.org/abstracts/search?q=HNF4a%20nuclear%20receptor" title=" HNF4a nuclear receptor"> HNF4a nuclear receptor</a>, <a href="https://publications.waset.org/abstracts/search?q=steroid%20hormone%20receptor%20family%20of%20transcription%20factors" title=" steroid hormone receptor family of transcription factors"> steroid hormone receptor family of transcription factors</a>, <a href="https://publications.waset.org/abstracts/search?q=hematological%20disorders" title=" hematological disorders"> hematological disorders</a> </p> <a href="https://publications.waset.org/abstracts/149357/the-transcription-factor-hnf4a-a-key-player-in-haematological-disorders" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/149357.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">96</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">217</span> Influence of Gestational Diabetes Mellitus on the Activity of Steroid C17-Hydroxylase-C17,20-Lyase in Patients with Intrahepatic Cholestasis of Pregnancy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Leona%20Ondrejikova">Leona Ondrejikova</a>, <a href="https://publications.waset.org/abstracts/search?q=Martin%20Hill"> Martin Hill</a>, <a href="https://publications.waset.org/abstracts/search?q=Antonin%20Parizek"> Antonin Parizek</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The incidence of gestational diabetes mellitus (GDM) is higher in women predisposed to developing intrahepatic cholestasis of pregnancy (ICP). Both diseases are associated with altered steroidogenesis when compared with none-ICP controls. However, the effect of GDM on circulating steroids in ICP patients remains unclear. The question remains, whether the levels of circulating steroids differ between ICP patients with and without GDM. In total 10 ICP patients without GDM (ICP+GDM-), 7 ICP patients with GDM (ICP+GDM+), and 15 controls (ICP-GDM-) were monitored during late gestation, at labor, and during three periods postpartum (day 5, week 3, and week 6 postpartum) (Šimják et al., 2018). The relationships between steroid profiles and patients’ status were evaluated using the ANOVA model consisting of subject factor, between-subject factors Group (ICP+GDM+, ICP+GDM-, ICP-GDM-), gestational age at the diagnosis of ICP and gestational age at labor, and within-subject factor Stage and ICP × Stage interaction. The levels of the C21 and C19 Δ5 steroids and 5α/β-reduced C19 steroids were highest in ICP+GDM+, while those for the ICP-GDM-, and ICP+GDM- groups were lower. In the C21 Δ4 steroids and their 5α/β-reduced metabolites, the steroid levels were highest in the ICP+GDM-, intermediate in the ICP-GDM- and lowest in the ICP+GDM+ group. This higher concentration in ICP+GDM- group may be of importance as the 5α-pregnane-3α,20α-diol disulfate, is considered as the substance inducing ICP. In general, these data show that the comorbidity with GDM substantially changes the steroidome in ICP patients towards the higher activity of steroid CYP17A1 lyase step in adrenal zona reticularis reduced CYP17A1 hydroxylase step in zona fasciculata. This is consistent with our previously published hypothesis about the critical role of maternal zona reticularis in the pathophysiology of ICP. Our present data also indicate that the comorbidity with GDM might moderate the gravity of the ICP in this way. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=CYP17A1" title="CYP17A1">CYP17A1</a>, <a href="https://publications.waset.org/abstracts/search?q=GC-MS" title=" GC-MS"> GC-MS</a>, <a href="https://publications.waset.org/abstracts/search?q=gestational%20diabetes%20mellitus" title=" gestational diabetes mellitus"> gestational diabetes mellitus</a>, <a href="https://publications.waset.org/abstracts/search?q=intrahepatic%20cholestasis%20of%20pregnancy" title=" intrahepatic cholestasis of pregnancy"> intrahepatic cholestasis of pregnancy</a> </p> <a href="https://publications.waset.org/abstracts/115495/influence-of-gestational-diabetes-mellitus-on-the-activity-of-steroid-c17-hydroxylase-c1720-lyase-in-patients-with-intrahepatic-cholestasis-of-pregnancy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/115495.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">140</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">216</span> Effects of Dietary E on Semen, Hormonal Profile and Testicular Biometry in Teddy Goat Bucks</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Zubair">Muhammad Zubair</a>, <a href="https://publications.waset.org/abstracts/search?q=Maqbool%20Ahmad"> Maqbool Ahmad</a>, <a href="https://publications.waset.org/abstracts/search?q=Al-Hafizah%20Shafia%20Tehseen%20Gul"> Al-Hafizah Shafia Tehseen Gul</a>, <a href="https://publications.waset.org/abstracts/search?q=Shujait%20Ali"> Shujait Ali </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The use of vitamins has significant effects on the reproductive system of mammals. The present study was conducted to investigate the useful effects of vitamin E on reproductive functions of Teddy bucks. For this purpose, 8 adult Teddy bucks were randomly divided into two treatment groups viz; A (control) and B (vitamin E with dose of 200 mg/kg BW/day). These treatments continued for 12 weeks. Semen quality parameters (volume, motility, sperm morphology and sperm DNA integrity) of experimental bucks of each group was evaluated on weekly basis, while testicular measurements (length, scrotal circumference and weights) were recorded at 0 and 12th week of experiment. Serum concentrations of male sex hormones (testosterone, LH, FSH) and cortisol were recorded fortnightly. Similarly, body weights of bucks were also measured fortnightly until completion of the study. The data were subjected to two-way analysis of variance, followed by Duncan test for multiple mean comparisons. Supplementation of vitamin E improved significantly (P<0.05) the semen quality parameter, body weights, testicular measurements and serum levels of sex hormones. However, there was no effect on serum cortisol. It was concluded from the present study that dietary supplementation of vitamin E has beneficial effects on the semen and hormones in male reproductive system. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hormones" title="hormones">hormones</a>, <a href="https://publications.waset.org/abstracts/search?q=semen" title=" semen"> semen</a>, <a href="https://publications.waset.org/abstracts/search?q=teddy%20bucks" title=" teddy bucks"> teddy bucks</a>, <a href="https://publications.waset.org/abstracts/search?q=testicular%20measurements" title=" testicular measurements"> testicular measurements</a> </p> <a href="https://publications.waset.org/abstracts/54209/effects-of-dietary-e-on-semen-hormonal-profile-and-testicular-biometry-in-teddy-goat-bucks" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/54209.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">293</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">215</span> The Exposure to Endocrine Disruptors during Pregnancy and Relation to Steroid Hormones</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=L.%20Kolatorova">L. Kolatorova</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20Vitku"> J. Vitku</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Adamcova"> K. Adamcova</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Simkova"> M. Simkova</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Hill"> M. Hill</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Parizek"> A. Parizek</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Duskova"> M. Duskova</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Endocrine disruptors (EDs) are substances leaching from various industrial products, which are able to interfere with the endocrine system. Their harmful effects on human health are generally well-known, and exposure during fetal development may have lasting effects. Fetal exposure and transplacental transport of bisphenol A (BPA) have been recently studied; however, less is known about alternatives such as bisphenol S (BPS), bisphenol F (BPF) and bisphenol AF (BPAF), which have started to appear in consumer products. The human organism is usually exposed to the mixture of EDs, out of which parabens are otherwise known to transfer placenta. The usage of many cosmetic, pharmaceutical and consumer products during the pregnancy that may contain parabens and bisphenols has led to the need for investigation. The aim of the study was to investigate the transplacental transport of BPA, its alternatives, and parabens, and to study their relation to fetal steroidogenesis. BPA, BPS, BPF, BPAF, methylparaben, ethylparaben, propylparaben, butylparaben, benzylparaben and 15 steroids including estrogens, corticoids, androgens and immunomodulatory ones were determined in 27 maternal (37th week of gestation) and cord plasma samples using liquid chromatography - tandem mass spectrometry methods. The statistical evaluation of the results showed significantly higher levels of BPA (p=0.0455) in cord plasma compared to maternal plasma. The results from multiple regression models investigated that in cord plasma, methylparaben, propylparaben and the sum of all measured parabens were inversely associated with testosterone levels. To our best knowledge, this study is the first attempt to determine the levels of alternative bisphenols in the maternal and cord blood, and also the first study reporting the simultaneous detection of bisphenols, parabens, and steroids in these biological fluids. Our study confirmed the transplacental transport of BPA, with likely accumulation in the fetal compartment. The negative association of cord blood parabens and testosterone levels highlights their possible risks, especially for the development of male fetuses. Acknowledgements: This work was supported by the project MH CR 17-30528 A from the Czech Health Research Council, MH CZ - DRO (Institute of Endocrinology - EÚ, 00023761) and by the MEYS CR (OP RDE, Excellent research - ENDO.CZ). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bisphenol" title="bisphenol">bisphenol</a>, <a href="https://publications.waset.org/abstracts/search?q=endocrine%20disruptor" title=" endocrine disruptor"> endocrine disruptor</a>, <a href="https://publications.waset.org/abstracts/search?q=paraben" title=" paraben"> paraben</a>, <a href="https://publications.waset.org/abstracts/search?q=pregnancy" title=" pregnancy"> pregnancy</a>, <a href="https://publications.waset.org/abstracts/search?q=steroid" title=" steroid"> steroid</a> </p> <a href="https://publications.waset.org/abstracts/83878/the-exposure-to-endocrine-disruptors-during-pregnancy-and-relation-to-steroid-hormones" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/83878.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">178</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">214</span> Effect of Resistance Exercise on Hypothalamic-Pituitary-Gonadal Axis </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Alireza%20Barari">Alireza Barari</a>, <a href="https://publications.waset.org/abstracts/search?q=Saeed%20Shirali"> Saeed Shirali</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmad%20Abdi"> Ahmad Abdi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Abstract: Introduction: Physical activity may be related to male reproductive function by affecting on thehypothalamic-pituitary-gonadal(HPG) axis. Our aim was to determine the effects of 6 weeks resistance exercise on reproductive hormones, HPG axis. The hypothalamic-pituitary-gonadal (HPG) axis refers tothe effects of endocrine glands in three-level including (i) the hypothalamic releasing hormone GnRH, which is synthesized in in a small heterogenous neuronal population and released in a pulsatile fashion, (ii) the anterior pituitary hormones, follicle-stimulating hormone(FSH) and luteinizing hormone (LH) and (iii) the gonadal hormones, which include both steroid such as testosterone (T), estradiol and progesterone and peptide hormones (such as inhibin). Hormonal changes that create a more anabolic environment have been suggested to contribute to the adaptation to strength exercise. Physical activity has an extensive impact on male reproductive function depending upon the intensity and duration of the exercise and the fitness level of the individual. However, strenuous exercise represents a physical stress and inflammation changed that challenges homeostasis. Materials and methods: Sixteen male volunteered were included in a 6-week control period followed by 6 weeks of resistance training (leg press, lat pull, chest press, squat, seatedrow, abdominal crunch, shoulder press, biceps curl and triceps press down) four times per week. intensity of training loading was 60%-75% of one maximum repetition. Participants performed 3 sets of 10 repetitions. Rest periods were two min between exercises and sets. Start with warm up exercises include: The muscles relax and stretch the body, which was for 10 minutes. Body composition, VO2max and the circulating level of free testosterone (fT), luteinizing hormone (LH), follicle-stimulating hormone (FSH), sex hormone binding globulin (SHBG) and inhibin B measured prior and post 6-week intervention. The hormonal levels of each serum sample were measured using commercially available ELISA kits. Analysis of anthropometrical data and hormonal level were compared using the independent samples t- test in both groups and using SPSS (version 19). P ≤ 0.05 was considered statistically significant. Results: For muscle strength, both lower- and upper-body strength were increased significantly. Aerobic fitness level improved in trained participant from 39.4 ± 5.6 to 41.9 ± 5.3 (P = 0.002). fT concentration rise progressively in the trained group and was signiﬁcantly greater than those in the control group (P = 0.000). By the end of the 6-week resistance training, serum SHBG signiﬁcantly increased in the trained group compared with the control group (P = 0.013). In response to resistance training, LH, FSH and inhibin B were not significantly changed. Discussion: According to our finfings, 6 weeks of resistance training induce fat loss without any changes in body weight and BMI. A decline of 25.3% in percentage of body fat with statiscally same weight was due to increase in muscle mass that happened during resistance exercise periods . Six weeks of resistance training resulted in signiﬁcant improvement in BF%, VO2max and increasing strength and the level of fT and SHBG. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=resistance" title="resistance">resistance</a>, <a href="https://publications.waset.org/abstracts/search?q=hypothalamic" title=" hypothalamic"> hypothalamic</a>, <a href="https://publications.waset.org/abstracts/search?q=pituitary" title=" pituitary"> pituitary</a>, <a href="https://publications.waset.org/abstracts/search?q=gonadal%20axis" title=" gonadal axis"> gonadal axis</a> </p> <a href="https://publications.waset.org/abstracts/34933/effect-of-resistance-exercise-on-hypothalamic-pituitary-gonadal-axis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/34933.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">399</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">213</span> Dependence of Androgen Status in Men with Primary Hypothyroidism on Duration and Condition of Compensation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Krytskyy%20T.">Krytskyy T.</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Introduction: The role of androgen deficiency in men as a factor in the pathogenesis of many somatic diseases is unmistakable. The interaction of thyroid and sex hormones with hypothyroidism in men is still the subject of discussions. The purpose of the study is to assess the androgen status of men with primary hypothyroidism, depending on its duration and the state of compensation. Materials and methods: 45 men with primary hypothyroidism aged 35 to 60 years, as well as 25 healthy men, who formed a control group, were under supervision. A selection of men for examination was conducted in the process of outpatient and in-patient treatment at the endocrinology department of the University Hospital in Ternopil. The functional state of the pituitary-gonadal system was evaluated in order to characterize the androgen status of patients. The concentration of follicle stimulating hormone, luteinizing hormone, prolactin, thyroid-stimulating hormone was determined in blood with the help of enzyme-linked method. Also, the content of hormones: total testosterone, linking sex hormones globulin were determined. Results: Reduced total testosterone (TT) content was found in 42.2% of patients with hypothyroidism. Herewith in 17.8% of patients, blood TT levels were lower than 8.0 nmol / L, and in 11 (24.4%) men, the rate was in the range of 8.0 to 12.0 nmol / L. Based on the results of the determination of the content of free testosterone (FT), the frequency of laboratory hypogonadism in men with hypothyroidism was higher than the results of the determination of TT. The degree of compensation of hypothyroidism probably did not affect the average levels of gonadotropic and sex hormones. Conclusions: Reduced total testosterone content was found in 42.2% of patients with primary hypothyroidism. Herewith, in 17.8% of patients blood TT levels were lower than 8.0 nmol / L, which is a sign of absolute deficiency of testosterone, and in 24.4% of men the rate ranged from 8.0 to 12.0 nmol / l , indicating partial androgen deficiency. Linking sex hormones globulin levels were believed to be lower in 46.7% of patients with hypothyroidism compared to control group. The average levels of E2 in the examined patients did not significantly differ from the mean of control group. FSH, LH, and prolactin levels in men with hypothyroidism were within the normal age limits and probably did not differ from those of control group. The degree of compensation of hypothyroidism probably did not affect the average levels of gonadotropic and sex hormones. The mean LH content in the blood was significantly increased in men with a duration of hypothyroidism up to 5 years and did not differ from that of the control group and in men with a duration of hypothyroidism over 5 years. In men with hypothyroidism, a probable reduction in T / LH coefficient is found. The obtained data may indicate a combined lesion of the central and peripheral parts of the pituitary-gonadal system in men with hypothyroidism. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=androgenic%20status" title="androgenic status">androgenic status</a>, <a href="https://publications.waset.org/abstracts/search?q=hypothyroidism" title=" hypothyroidism"> hypothyroidism</a>, <a href="https://publications.waset.org/abstracts/search?q=testosterone" title=" testosterone"> testosterone</a>, <a href="https://publications.waset.org/abstracts/search?q=linking%20sex%20hormones%20globulin" title=" linking sex hormones globulin"> linking sex hormones globulin</a> </p> <a href="https://publications.waset.org/abstracts/96829/dependence-of-androgen-status-in-men-with-primary-hypothyroidism-on-duration-and-condition-of-compensation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/96829.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">195</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">212</span> The Cooperation among Insulin, Cortisol and Thyroid Hormones in Morbid Obese Children and Metabolic Syndrome </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Orkide%20Donma">Orkide Donma</a>, <a href="https://publications.waset.org/abstracts/search?q=Mustafa%20M.%20Donma"> Mustafa M. Donma</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Obesity, a disease associated with a low-grade inflammation, is a risk factor for the development of metabolic syndrome (MetS). So far, MetS risk factors such as parameters related to glucose and lipid metabolisms as well as blood pressure were considered for the evaluation of this disease. There are still some ambiguities related to the characteristic features of MetS observed particularly in pediatric population. Hormonal imbalance is also important, and quite a lot information exists about the behaviour of some hormones in adults. However, the hormonal profiles in pediatric metabolism have not been cleared yet. The aim of this study is to investigate the profiles of cortisol, insulin, and thyroid hormones in children with MetS. The study population was composed of morbid obese (MO) children without (Group 1) and with (Group 2) MetS components. WHO BMI-for age and sex percentiles were used for the classification of obesity. The values above 99 percentile were defined as morbid obesity. Components of MetS (central obesity, glucose intolerance, high blood pressure, high triacylglycerol levels, low levels of high density lipoprotein cholesterol) were determined. Anthropometric measurements were performed. Ratios as well as obesity indices were calculated. Insulin, cortisol, thyroid stimulating hormone (TSH), free T<sub>3</sub> and free T<sub>4 </sub>analyses were performed by electrochemiluminescence immunoassay. Data were evaluated by statistical package for social sciences program. p<0.05 was accepted as the degree for statistical significance. The mean ages±SD values of Group 1 and Group 2 were 9.9±3.1 years and 10.8±3.2 years, respectively. Body mass index (BMI) values were calculated as 27.4±5.9 kg/m<sup>2</sup> and 30.6±8.1 kg/m<sup>2</sup>, successively. There were no statistically significant differences between the ages and BMI values of the groups. Insulin levels were statistically significantly increased in MetS in comparison with the levels measured in MO children. There was not any difference between MO children and those with MetS in terms of cortisol, T<sub>3</sub>, T<sub>4</sub> and TSH. However, T<sub>4</sub> levels were positively correlated with cortisol and negatively correlated with insulin. None of these correlations were observed in MO children. Cortisol levels in both MO as well as MetS group were significantly correlated. Cortisol, insulin, and thyroid hormones are essential for life. Cortisol, called the control system for hormones, orchestrates the performance of other key hormones. It seems to establish a connection between hormone imbalance and inflammation. During an inflammatory state, more cortisol is produced to fight inflammation. High cortisol levels prevent the conversion of the inactive form of the thyroid hormone T<sub>4</sub> into active form T<sub>3</sub>. Insulin is reduced due to low thyroid hormone. T<sub>3</sub>, which is essential for blood sugar control- requires cortisol levels within the normal range. Positive association of T<sub>4</sub> with cortisol and negative association of it with insulin are the indicators of such a delicate balance among these hormones also in children with MetS. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=children" title="children">children</a>, <a href="https://publications.waset.org/abstracts/search?q=cortisol" title=" cortisol"> cortisol</a>, <a href="https://publications.waset.org/abstracts/search?q=insulin" title=" insulin"> insulin</a>, <a href="https://publications.waset.org/abstracts/search?q=metabolic%20syndrome" title=" metabolic syndrome"> metabolic syndrome</a>, <a href="https://publications.waset.org/abstracts/search?q=thyroid%20hormones" title=" thyroid hormones"> thyroid hormones</a> </p> <a href="https://publications.waset.org/abstracts/91666/the-cooperation-among-insulin-cortisol-and-thyroid-hormones-in-morbid-obese-children-and-metabolic-syndrome" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/91666.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">148</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">211</span> Patterns, Triggers, and Predictors of Relapses among Children with Steroid Sensitive Idiopathic Nephrotic Syndrome at the University of Abuja Teaching Hospital, Gwagwalada, Abuja, Nigeria</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Emmanuel%20Ademola%20Anigilaje">Emmanuel Ademola Anigilaje</a>, <a href="https://publications.waset.org/abstracts/search?q=Ibraheem%20Ishola"> Ibraheem Ishola</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Background: Childhood steroid-sensitive idiopathic nephrotic syndrome (SSINS) is plagued with relapses that contribute to its morbidity and the cost of treatment. Materials and Methods: This is a retrospective review of relapses among children with SSINS at the University of Abuja Teaching Hospital from January 2016 to July 2020. Triggers related to relapse incidents were noted. Chi-square test was deployed for predictors (factors at the first clinical presentations that associate with subsequent relapses) of relapses. Predictors with p-values of less than 0.05 were considered significant and 95% confidence intervals (CI) and odd ratio (OR) were described. Results: Sixty SSINS comprising 52 males (86.7%), aged 23 months to 18 years, with a mean age of 7.04±4.16 years were studied. Thirty-eight (63.3%) subjects had 126 relapses including infrequent relapses in 30 (78.9%) and frequent relapses in 8 (21.1%). The commonest triggers were acute upper respiratory tract infections (68, 53.9%) and urinary tract infections (UTIs) in 25 (19.8%) relapses. In 4 (3.2%) relapses, no trigger was identified. The time-to-first relapse ranged 14 days to 365 days with a median time of 60 days. The significant predictors were hypertension (OR=3.4, 95% CI; 1.04-11.09, p=0.038), UTIs (OR=9.9, 95% CI; 1.16-80.71, p= 0.014), malaria fever (OR=8.0, 95% CI; 2.45-26.38, p˂0.001), micro-haematuria (OR=4.9, 95% CI; 11.58-15.16, p=0.004), elevated serum creatinine (OR=12.3, 95%CI; 1.48-101.20, p=0.005) and hypercholesterolaemia (OR=4.1, 95%CI; 1.35-12.63, p=0.011). Conclusion: While the pathogenesis of relapses remains unknown, it is prudent to consider relapse-specific preventive strategies against triggers and predictors of relapses in our setting. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Patterns" title="Patterns">Patterns</a>, <a href="https://publications.waset.org/abstracts/search?q=triggers" title=" triggers"> triggers</a>, <a href="https://publications.waset.org/abstracts/search?q=predictors" title=" predictors"> predictors</a>, <a href="https://publications.waset.org/abstracts/search?q=steroid-sensitive%20idiopathic%20nephrotic%20syndrome" title=" steroid-sensitive idiopathic nephrotic syndrome"> steroid-sensitive idiopathic nephrotic syndrome</a>, <a href="https://publications.waset.org/abstracts/search?q=relapses" title=" relapses"> relapses</a>, <a href="https://publications.waset.org/abstracts/search?q=Nigeria" title=" Nigeria"> Nigeria</a> </p> <a href="https://publications.waset.org/abstracts/148013/patterns-triggers-and-predictors-of-relapses-among-children-with-steroid-sensitive-idiopathic-nephrotic-syndrome-at-the-university-of-abuja-teaching-hospital-gwagwalada-abuja-nigeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/148013.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">158</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">210</span> Non-Linear Assessment of Chromatographic Lipophilicity of Selected Steroid Derivatives</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Milica%20Karad%C5%BEi%C4%87">Milica Karadžić</a>, <a href="https://publications.waset.org/abstracts/search?q=Lidija%20Jevri%C4%87"> Lidija Jevrić</a>, <a href="https://publications.waset.org/abstracts/search?q=Sanja%20Podunavac-Kuzmanovi%C4%87"> Sanja Podunavac-Kuzmanović</a>, <a href="https://publications.waset.org/abstracts/search?q=Strahinja%20Kova%C4%8Devi%C4%87"> Strahinja Kovačević</a>, <a href="https://publications.waset.org/abstracts/search?q=Anamarija%20Mandi%C4%87"> Anamarija Mandić</a>, <a href="https://publications.waset.org/abstracts/search?q=Aleksandar%20Oklje%C5%A1a"> Aleksandar Oklješa</a>, <a href="https://publications.waset.org/abstracts/search?q=Andrea%20Nikoli%C4%87"> Andrea Nikolić</a>, <a href="https://publications.waset.org/abstracts/search?q=Marija%20Saka%C4%8D"> Marija Sakač</a>, <a href="https://publications.waset.org/abstracts/search?q=Katarina%20Penov%20Ga%C5%A1i"> Katarina Penov Gaši</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Using chemometric approach, the relationships between the chromatographic lipophilicity and in silico molecular descriptors for twenty-nine selected steroid derivatives were studied. The chromatographic lipophilicity was predicted using artificial neural networks (ANNs) method. The most important in silico molecular descriptors were selected applying stepwise selection (SS) paired with partial least squares (PLS) method. Molecular descriptors with satisfactory variable importance in projection (VIP) values were selected for ANN modeling. The usefulness of generated models was confirmed by detailed statistical validation. High agreement between experimental and predicted values indicated that obtained models have good quality and high predictive ability. Global sensitivity analysis (GSA) confirmed the importance of each molecular descriptor used as an input variable. High-quality networks indicate a strong non-linear relationship between chromatographic lipophilicity and used in silico molecular descriptors. Applying selected molecular descriptors and generated ANNs the good prediction of chromatographic lipophilicity of the studied steroid derivatives can be obtained. This article is based upon work from COST Actions (CM1306 and CA15222), supported by COST (European Cooperation and Science and Technology). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=artificial%20neural%20networks" title="artificial neural networks">artificial neural networks</a>, <a href="https://publications.waset.org/abstracts/search?q=chemometrics" title=" chemometrics"> chemometrics</a>, <a href="https://publications.waset.org/abstracts/search?q=global%20sensitivity%20analysis" title=" global sensitivity analysis"> global sensitivity analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=liquid%20chromatography" title=" liquid chromatography"> liquid chromatography</a>, <a href="https://publications.waset.org/abstracts/search?q=steroids" title=" steroids"> steroids</a> </p> <a href="https://publications.waset.org/abstracts/60203/non-linear-assessment-of-chromatographic-lipophilicity-of-selected-steroid-derivatives" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/60203.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">345</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">209</span> Impact of Bacillus subtilis Exotoxins on Fecundity, Sex Hormones and Release of Schistosoma mansoni cercariae in Biomphalaria alexandrina Snails </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Alaa%20A.%20Youssef">Alaa A. Youssef</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20A.%20El-Emam"> Mohamed A. El-Emam</a>, <a href="https://publications.waset.org/abstracts/search?q=Momeana%20B.%20Mahmoud"> Momeana B. Mahmoud</a>, <a href="https://publications.waset.org/abstracts/search?q=Mona%20%20Ragheb"> Mona Ragheb</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Schistosomiasis, also known as bilharzia, is a disease caused by a parasitic trematode worm called Schistosoma. Biological control of the snail intermediate hosts of Schistosoma is one of the promising methods for eliminating this disease in Egypt. The molluscicidal activity of exotoxins secreted from Bacillus subtilis bacteria was studied. The effect of these exotoxins was studied on the fecundity of Biomphalaria alexandrina snails the intermediate host of Schistosoma mansoni; the fecundity includes the reproductive rate (R0) of B. alexandrina snails and levels of sex hormones (progesterone, testosterone, and estradiol). Moreover, the cercarial production of S. mansoni was determined. The results showed a significant reduction in the egg-laying capacity of the treated snails after exposure to sublethal concentrations ( LC10 and LC25) of B. Subtilis exotoxins; this reduction reached 70% at LC25. Moreover, B. Subtilis exotoxins' significantly suppressed the cercarial production of B. alexandrina snails. It is concluded that the exotoxins of Bacillus subtilis bacteria play an important role in the interference of the Schistosomiasis transmission, hence should be applied in the strategy of schistosomiasis control. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=schistosomiasis" title="schistosomiasis">schistosomiasis</a>, <a href="https://publications.waset.org/abstracts/search?q=Biomphalaria%20alexandrina%20snails" title=" Biomphalaria alexandrina snails"> Biomphalaria alexandrina snails</a>, <a href="https://publications.waset.org/abstracts/search?q=Bacillus%20subtilis%20bacteria" title=" Bacillus subtilis bacteria"> Bacillus subtilis bacteria</a>, <a href="https://publications.waset.org/abstracts/search?q=fecundity" title=" fecundity"> fecundity</a>, <a href="https://publications.waset.org/abstracts/search?q=sex%20hormones" title=" sex hormones"> sex hormones</a> </p> <a href="https://publications.waset.org/abstracts/111495/impact-of-bacillus-subtilis-exotoxins-on-fecundity-sex-hormones-and-release-of-schistosoma-mansoni-cercariae-in-biomphalaria-alexandrina-snails" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/111495.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">135</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">208</span> Evaluation of Newly Synthesized Steroid Derivatives Using In silico Molecular Descriptors and Chemometric Techniques</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Milica%20%C5%BD.%20Karad%C5%BEi%C4%87">Milica Ž. Karadžić</a>, <a href="https://publications.waset.org/abstracts/search?q=Lidija%20R.%20Jevri%C4%87"> Lidija R. Jevrić</a>, <a href="https://publications.waset.org/abstracts/search?q=Sanja%20Podunavac-Kuzmanovi%C4%87"> Sanja Podunavac-Kuzmanović</a>, <a href="https://publications.waset.org/abstracts/search?q=Strahinja%20Z.%20Kova%C4%8Devi%C4%87"> Strahinja Z. Kovačević</a>, <a href="https://publications.waset.org/abstracts/search?q=Anamarija%20I.%20Mandi%C4%87"> Anamarija I. Mandić</a>, <a href="https://publications.waset.org/abstracts/search?q=Katarina%20Penov-Ga%C5%A1i"> Katarina Penov-Gaši</a>, <a href="https://publications.waset.org/abstracts/search?q=Andrea%20R.%20Nikoli%C4%87"> Andrea R. Nikolić</a>, <a href="https://publications.waset.org/abstracts/search?q=Aleksandar%20M.%20Oklje%C5%A1a"> Aleksandar M. Oklješa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study considered selection of the in silico molecular descriptors and the models for newly synthesized steroid derivatives description and their characterization using chemometric techniques. Multiple linear regression (MLR) models were established and gave the best molecular descriptors for quantitative structure-retention relationship (QSRR) modeling of the retention of the investigated molecules. MLR models were without multicollinearity among the selected molecular descriptors according to the variance inflation factor (VIF) values. Used molecular descriptors were ranked using generalized pair correlation method (GPCM). In this method, the significant difference between independent variables can be noticed regardless almost equal correlation between dependent variable. Generated MLR models were statistically and cross-validated and the best models were kept. Models were ranked using sum of ranking differences (SRD) method. According to this method, the most consistent QSRR model can be found and similarity or dissimilarity between the models could be noticed. In this study, SRD was performed using average values of experimentally observed data as a golden standard. Chemometric analysis was conducted in order to characterize newly synthesized steroid derivatives for further investigation regarding their potential biological activity and further synthesis. This article is based upon work from COST Action (CM1105), supported by COST (European Cooperation in Science and Technology). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=generalized%20pair%20correlation%20method" title="generalized pair correlation method">generalized pair correlation method</a>, <a href="https://publications.waset.org/abstracts/search?q=molecular%20descriptors" title=" molecular descriptors"> molecular descriptors</a>, <a href="https://publications.waset.org/abstracts/search?q=regression%20analysis" title=" regression analysis"> regression analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=steroids" title=" steroids"> steroids</a>, <a href="https://publications.waset.org/abstracts/search?q=sum%20of%20ranking%20differences" title=" sum of ranking differences"> sum of ranking differences</a> </p> <a href="https://publications.waset.org/abstracts/49456/evaluation-of-newly-synthesized-steroid-derivatives-using-in-silico-molecular-descriptors-and-chemometric-techniques" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/49456.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">347</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">207</span> The Effect of Acute Toxicity and Thyroid Hormone Treatments on Hormonal Changes during Embryogenesis of Acipenser persicus</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Samaneh%20Nazeri">Samaneh Nazeri</a>, <a href="https://publications.waset.org/abstracts/search?q=Bagher%20Mojazi%20Amiri"> Bagher Mojazi Amiri</a>, <a href="https://publications.waset.org/abstracts/search?q=Hamid%20Farahmand"> Hamid Farahmand</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Production of high quality fish eggs with reasonable hatching rate makes a success in aquaculture industries. It is influenced by the environmental stimulators and inhibitors. Diazinon is a widely-used pesticide in Golestan province (Southern Caspian Sea, North of Iran) which is washed to the aquatic environment (3 mg/L in the river). It is little known about the effect of this pesticide on the embryogenesis of sturgeon fish, the valuable species of the Caspian Sea. Hormonal content of the egg is an important factor to guaranty the successful passes of embryonic stages. In this study, the fate of Persian sturgeon embryo to 24, 48, 72, and 96-hours exposure of diazinon (LC<sub>50</sub> dose) was tested. Also, the effect of thyroid hormones (T3 and T4) on these embryos was tested concurrently or separately with diazinon LC <sub>50</sub> dose. Fertilized eggs are exposed to T3 (low dose: 1 ng/ml, high dose: 10 ng/ml), T4 (low dose: 1 ng/ml, high dose: 10 ng/ml). Six eggs were randomly selected from each treatment (with three replicates) in five developmental stages (two cell- division, neural, heart present, heart beaten, and hatched larvae). The possibility of changing T3, T4, and cortisol contents of the embryos were determined in all treated groups and in every mentioned embryonic stage. The hatching rate in treated groups was assayed at the end of the embryogenesis to clarify the effect of thyroid hormones and diazinon. The results indicated significant differences in thyroid hormone contents, but no significant differences were recognized in cortisol levels at various early life stages of embryos. There was also significant difference in thyroid hormones in (T3, T4) + diazinon treated embryos (<em>P</em>˂0.05), while no significant difference between control and treatments in cortisol levels was observed. The highest hatching rate was recorded in HT3 treatment, while the lowest hatching rate was recorded for diazinon LC<sub>50</sub> treatment. The result confirmed that Persian sturgeon embryo is less sensitive to diazinon compared to teleost embryos, and thyroid hormones may increase hatching rate even in the presence of diazinon. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Persian%20sturgeon" title="Persian sturgeon">Persian sturgeon</a>, <a href="https://publications.waset.org/abstracts/search?q=diazinon" title=" diazinon"> diazinon</a>, <a href="https://publications.waset.org/abstracts/search?q=thyroid%20hormones" title=" thyroid hormones"> thyroid hormones</a>, <a href="https://publications.waset.org/abstracts/search?q=cortisol" title=" cortisol"> cortisol</a>, <a href="https://publications.waset.org/abstracts/search?q=embryo" title=" embryo"> embryo</a> </p> <a href="https://publications.waset.org/abstracts/57048/the-effect-of-acute-toxicity-and-thyroid-hormone-treatments-on-hormonal-changes-during-embryogenesis-of-acipenser-persicus" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/57048.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">303</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=steroid%20hormones&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=steroid%20hormones&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=steroid%20hormones&page=4">4</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=steroid%20hormones&page=5">5</a></li> <li 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