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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="antioxidant activity"> <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> 6621</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: antioxidant activity</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6621</span> Antioxidant Activity of the Algerian Traditional Kefir Supernatant</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=H.%20Amellal-Chibane">H. Amellal-Chibane</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Dehdouh"> N. Dehdouh</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Ait-Kaki"> S. Ait-Kaki</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20%20Halladj"> F. Halladj</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Kefir is fermented milk that is produced by adding Kefir grains, consisting of bacteria and yeasts, to milk. The aim of this study was to investigate the antioxidant activity of the kefir supernatant and the raw milk. The Antioxidant activity assays of kefir supernatant and raw milk were evaluated by assessing the DPPH radical-scavenging activity. Kefir supernatant demonstrated high antioxidant activity (87.75%) compared to the raw milk (70.59 %). These results suggest that the Algerian kefir has interesting antioxidant activity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title="antioxidant activity">antioxidant activity</a>, <a href="https://publications.waset.org/abstracts/search?q=kefir" title=" kefir"> kefir</a>, <a href="https://publications.waset.org/abstracts/search?q=kefir%20supernatant" title=" kefir supernatant"> kefir supernatant</a>, <a href="https://publications.waset.org/abstracts/search?q=raw%20milk" title=" raw milk "> raw milk </a> </p> <a href="https://publications.waset.org/abstracts/24330/antioxidant-activity-of-the-algerian-traditional-kefir-supernatant" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24330.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">506</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">6620</span> Antioxidant Extraction from Indonesian Crude Palm Oil and Its Antioxidation Activity</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Supriyono">Supriyono</a>, <a href="https://publications.waset.org/abstracts/search?q=Sumardiyono"> Sumardiyono</a>, <a href="https://publications.waset.org/abstracts/search?q=Puti%20Pertiwi"> Puti Pertiwi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Crude palm oil (CPO) is a vegetable oil that came from a palm tree bunch. Palm oil tree was known as highest vegetable oil yield. It was grown across Equatorial County, especially in Malaysia and Indonesia. The greenish red color on CPO was came from carotenoid antioxidant, which could be extracted and use separately as functional food and other purposes as antioxidant source. Another antioxidant that also found in CPO is tocopherol. The aim of the research work is to find antioxidant activity on CPO comparing to the synthetic antioxidant that available in a market. On this research work, antioxidant was extracted by using a mixture of acetone and n. hexane, while activity of the antioxidant extract was determine by DPPH method. The extracted matter was shown that their antioxidant activity was about 45% compare to pure tocopherol and beta carotene. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antioxidant" title="antioxidant">antioxidant</a>, <a href="https://publications.waset.org/abstracts/search?q=" title=" "> </a>, <a href="https://publications.waset.org/abstracts/search?q=beta%20carotene" title=" beta carotene"> beta carotene</a>, <a href="https://publications.waset.org/abstracts/search?q=" title=" "> </a>, <a href="https://publications.waset.org/abstracts/search?q=crude%20palm%20oil" title=" crude palm oil"> crude palm oil</a>, <a href="https://publications.waset.org/abstracts/search?q=" title=""></a>, <a href="https://publications.waset.org/abstracts/search?q=DPPH" title=" DPPH"> DPPH</a>, <a href="https://publications.waset.org/abstracts/search?q=" title=" "> </a>, <a href="https://publications.waset.org/abstracts/search?q=tocopherol" title=" tocopherol "> tocopherol </a> </p> <a href="https://publications.waset.org/abstracts/74220/antioxidant-extraction-from-indonesian-crude-palm-oil-and-its-antioxidation-activity" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/74220.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">291</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">6619</span> Crude Palm Oil Antioxidant Extraction and the Antioxidation Activity</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Supriyono%20Supriyono">Supriyono Supriyono</a>, <a href="https://publications.waset.org/abstracts/search?q=Sumardiyono%20Sumardiyono"> Sumardiyono Sumardiyono</a>, <a href="https://publications.waset.org/abstracts/search?q=Peni%20Pujiastuti"> Peni Pujiastuti</a>, <a href="https://publications.waset.org/abstracts/search?q=Dian%20Indriana%20Hapsari"> Dian Indriana Hapsari</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Crude palm oil (CPO) is a vegetable oil that came from a palm tree bunch. The productivity of the oil is 12 ton/hectare/year. Thus palm oil tree was known as highest vegetable oil yield. It was grown across Equatorial County, especially in Malaysia and Indonesia. The greenish-red color on CPO was come from carotenoid. Carotenoid is one of the antioxidants that could be extracted. Carotenoid could be used as functional food and other purposes. Another antioxidant that also found in CPO is tocopherol. The aim of the research work is to find antioxidant activity on CPO comparing to the synthetic antioxidant that available in a market. In this research work, antioxidant was extracted by a mixture of acetone and n.hexane, while the activity of the antioxidant extract was determined by DPPH method. Antioxidant activity of the extracted compound about 46% compared to pure tocopherol. While the solvent mixture compose by 90% acetone and 10% n. hexane meet the best on the antioxidant activity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antioxidant" title="antioxidant">antioxidant</a>, <a href="https://publications.waset.org/abstracts/search?q=beta%20carotene" title=" beta carotene"> beta carotene</a>, <a href="https://publications.waset.org/abstracts/search?q=crude%20palm%20oil" title=" crude palm oil"> crude palm oil</a>, <a href="https://publications.waset.org/abstracts/search?q=DPPH" title=" DPPH"> DPPH</a>, <a href="https://publications.waset.org/abstracts/search?q=tocopherol" title=" tocopherol"> tocopherol</a> </p> <a href="https://publications.waset.org/abstracts/91546/crude-palm-oil-antioxidant-extraction-and-the-antioxidation-activity" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/91546.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">214</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">6618</span> A New Phenolic Compound Isolated from Laurus nobilis from Lebanon and Comparison of Antioxidant Activity of Different Parts</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Turk%20Ayman">Turk Ayman</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahn%20Jong%20Hoon"> Ahn Jong Hoon</a>, <a href="https://publications.waset.org/abstracts/search?q=Khalife%20K.%20Hala"> Khalife K. Hala</a>, <a href="https://publications.waset.org/abstracts/search?q=Gali-Muhtasib%20Hala"> Gali-Muhtasib Hala</a>, <a href="https://publications.waset.org/abstracts/search?q=Lee%20Mi%20Kyeong"> Lee Mi Kyeong </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Laurus nobilis is an aromatic plant widely distributed in the Mediterranean region. The leaves of this plant are frequently used as a spice and as a traditional medicine for several diseases. In our present study, the methanolic extract of L. nobilis leaves showed antioxidant activity. Chromatographic separations of the EtOAc fraction which had the highest antioxidant activity led to the isolation of 12 compounds. Among them, there was a new phenylpropanoid derivative, which was identified by 1D and 2D NMR experiments, as well as high resolution mass spectrometry. In addition, two major compounds, catechin and epicatechin, which showed strong antioxidant activity may be responsible for the antioxidant activity of L. nobilis leaves. Since different plant parts may contain different types of constituents which contribute to the biological activities, we investigated the antioxidant activity of different parts of L. nobilis such as leaves, stems and fruits. Stems of L. nobilis showed the most potent antioxidant activity, followed by leaves. Further quantitation of total phenol and flavonoids contents revealed a positive correlation between the content of these compounds and antioxidant activity. Taken together, phenolic compounds including flavonoids are responsible for antioxidant activity of L. nobilis. In addition, stem parts of L. nobilis are suggested as good sources for antioxidant activity. Conclusively, L. nobilis might be effective in several free radical mediated diseases. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title="antioxidant activity">antioxidant activity</a>, <a href="https://publications.waset.org/abstracts/search?q=different%20parts" title=" different parts"> different parts</a>, <a href="https://publications.waset.org/abstracts/search?q=Laurus%20nobilis" title=" Laurus nobilis"> Laurus nobilis</a>, <a href="https://publications.waset.org/abstracts/search?q=phenolic%20compound" title=" phenolic compound "> phenolic compound </a> </p> <a href="https://publications.waset.org/abstracts/56185/a-new-phenolic-compound-isolated-from-laurus-nobilis-from-lebanon-and-comparison-of-antioxidant-activity-of-different-parts" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/56185.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">307</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">6617</span> Polyphenols Content and Antioxidant Activity of Extracts from Peganum harmala Seeds</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rachid%20Kacem">Rachid Kacem</a>, <a href="https://publications.waset.org/abstracts/search?q=Sara%20Talbi"> Sara Talbi</a>, <a href="https://publications.waset.org/abstracts/search?q=Yasmina%20Hemissi"> Yasmina Hemissi</a>, <a href="https://publications.waset.org/abstracts/search?q=Sofia%20%20Bouguattoucha"> Sofia Bouguattoucha</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of the present work is the evaluation of the antioxidant activity of the Peganum harmala (P. harmala) seeds extracts. The antioxidant activity was evaluated by applying two methods, the method of ß-carotene bleaching and DPPH (2, 2-Diphenyl-1-Picryl-Hydrazyl). Using Folin-Ciocalteu assay, these results revealed that the concentration of polyphenols in EthOH E. (122.28 ± 2.24 µg GAE/mg extract) is the highest. The antiradical activity of the P. harmala seeds extracts on DPPH was found to be dose dependent with polyphenols concentration. The E. EthOH extract showed the highest antioxidant activity (IC = 252.10 ± 11.18 μg /ml). The test of β-carotene bleaching indicates that the E. EthOH of P. harmala showed the highest percentage of the antioxidant activity (49.88 %). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title="antioxidant activity">antioxidant activity</a>, <a href="https://publications.waset.org/abstracts/search?q=Peganum%20harmala" title=" Peganum harmala"> Peganum harmala</a>, <a href="https://publications.waset.org/abstracts/search?q=polyphenols" title=" polyphenols"> polyphenols</a>, <a href="https://publications.waset.org/abstracts/search?q=flavonoids" title=" flavonoids "> flavonoids </a> </p> <a href="https://publications.waset.org/abstracts/32852/polyphenols-content-and-antioxidant-activity-of-extracts-from-peganum-harmala-seeds" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/32852.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">506</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">6616</span> In vitro Antioxidant and DNA Protectant Activity of Different Skin Colored Eggplant (Solanum melongena)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=K.%20M.%20Somawathie">K. M. Somawathie</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20Rizliya"> V. Rizliya</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20A.%20M.%20Wickrmasinghe"> H. A. M. Wickrmasinghe</a>, <a href="https://publications.waset.org/abstracts/search?q=Terrence%20Madhujith"> Terrence Madhujith</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The main objective of our study was to determine the in vitro antioxidant and DNA protectant activity of aqueous extract of S. melongena with different skin colors; dark purple (DP), moderately purple (MP), light purple (LP) and purple and green (PG). The antioxidant activity was evaluated using the DPPH and ABTS free radical scavenging assay, ferric reducing antioxidant power (FRAP), ferric thiocyanate (FTC) and the egg yolk model. The effectiveness of eggplant extracts against radical induced DNA damage was also determined. There was a significant difference (p < 0.0001) between the skin color and antioxidant activity. TPC and FRAP values of eggplant extracts ranged from 48.67±0.27-61.11±0.26 (mg GAE/100 g fresh weight) and 4.19±0.11-7.46±0.26 (mmol of FeS04/g of fresh weight) respectively. MP displayed the highest percentage of DPPH radical scavenging activity while, DP demonstrated the strongest total antioxidant capacity. In the FTC and egg yolk model, DP and MP showed better antioxidant activity than PG and LP. All eggplant extracts showed potent antioxidant activity in retaining DNA against AAPH mediated radical damage. DP and MP demonstrated better antioxidant activity which may be attributed to the higher phenolic content since a positive correlation was observed between the TPC and the antioxidant parameters. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Solanum%20melongena" title="Solanum melongena">Solanum melongena</a>, <a href="https://publications.waset.org/abstracts/search?q=skin%20color" title=" skin color"> skin color</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant" title=" antioxidant"> antioxidant</a>, <a href="https://publications.waset.org/abstracts/search?q=DNA%20protection" title=" DNA protection"> DNA protection</a>, <a href="https://publications.waset.org/abstracts/search?q=lipid%20peroxidation" title=" lipid peroxidation"> lipid peroxidation</a> </p> <a href="https://publications.waset.org/abstracts/35657/in-vitro-antioxidant-and-dna-protectant-activity-of-different-skin-colored-eggplant-solanum-melongena" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/35657.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">431</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">6615</span> Chemical Composition and Antioxidant Activity of Methanolic Extract of Spilanthes acmella Murr.</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Wanthani%20Paengsri">Wanthani Paengsri</a>, <a href="https://publications.waset.org/abstracts/search?q=Thanyarat%20Chuesaard"> Thanyarat Chuesaard</a>, <a href="https://publications.waset.org/abstracts/search?q=Napapha%20Promsawan"> Napapha Promsawan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Spilanthes acmella Murr. was extracted with methanol, yielding methanol crude extract 5.86 %w/w. This study aimed to examine the chemical composition and antioxidant activity of methanolic crude extract. The chemical composition of methanolic crude extract was analyzed by gas chromatography-mass spectrometry (GC-MS). The predominant components were found to be palmitic acid (40.08%), 2-hexadecanoyl glycerol (6.96%) and octadecanoic acid (4.06%). Antioxidant activity was determined using 2,2-diphenyl-1-picryl hydrazyl (DPPH) free radical, for evaluating free radicle scavenging activity. The methanolic extract at 150 µg/mL showed an antioxidant activity with high of radical scavenging activity (75.23%). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title="antioxidant activity">antioxidant activity</a>, <a href="https://publications.waset.org/abstracts/search?q=GC-MS%20analysis" title=" GC-MS analysis"> GC-MS analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=Spilanthes" title=" Spilanthes"> Spilanthes</a>, <a href="https://publications.waset.org/abstracts/search?q=Phak-Kratt%20Hauwaen" title=" Phak-Kratt Hauwaen"> Phak-Kratt Hauwaen</a> </p> <a href="https://publications.waset.org/abstracts/80642/chemical-composition-and-antioxidant-activity-of-methanolic-extract-of-spilanthes-acmella-murr" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/80642.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">531</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">6614</span> Antioxidant and Antimicrobial Properties of Twenty Medicinal Plants</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Krimat">S. Krimat</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20Dob"> T. Dob</a>, <a href="https://publications.waset.org/abstracts/search?q=L.%20Lamari"> L. Lamari</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Metidji"> H. Metidji</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of this study is to evaluate the antioxidant and antimicrobial activity of hydromethanolic extract of selected Algerian medicinal flora. The antioxidant activity of extract was evaluated in terms of radical scavenging potential (DPPH) and β-carotene bleaching assay. Total phenolic contents and flavonoid contents were also measured. Antimicrobial activity of these plants was tested against five microorganisms Pseu-domonas aeruginosa Bacillus subtilis, Escherichia coli, Staphylococcus aureus, and Candida albicans. The results showed that Pistacia lentiscus showed the highest antioxidant capacities using DPPH assay (IC50 = 4.60 μg/ml), while Populus trimula had the highest antioxidant activity in β-carotene/linolaic acid assay. The most interesting antimicrobial activity was obtained from Sysimbrium officinalis, Rhamnus alaternus, Origanum glandulosum, Cupressus sempervirens, Pinus halipensis and Centaurea calcitrapa. The results indicate that the plants tested may be potential sources for isolation of natural antioxidant and antimicrobial compounds. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Algerian%20medicinal%20plants" title="Algerian medicinal plants">Algerian medicinal plants</a>, <a href="https://publications.waset.org/abstracts/search?q=antimicrobial%20activity" title=" antimicrobial activity"> antimicrobial activity</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title=" antioxidant activity"> antioxidant activity</a>, <a href="https://publications.waset.org/abstracts/search?q=disc%20diffusion%20method" title=" disc diffusion method"> disc diffusion method</a> </p> <a href="https://publications.waset.org/abstracts/53185/antioxidant-and-antimicrobial-properties-of-twenty-medicinal-plants" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/53185.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">350</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">6613</span> Enrichment of the Antioxidant Activity of Decaffeinated Assam Green Tea by Herbal Plant: A Synergistic Effect</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abhijit%20Das">Abhijit Das</a>, <a href="https://publications.waset.org/abstracts/search?q=Runu%20Chakraborty"> Runu Chakraborty</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Tea is the most widely consumed beverage aside from water; it is grown in about 30 countries with a per capita worldwide consumption of approximately 0.12 liter per year. Green tea is of growing importance with its antioxidant contents associated with its health benefits. The various extraction methods can influence the polyphenol concentrations of green tea. The purpose of the study was to quantify the polyphenols, flavonoid and antioxidant activity of both caffeinated and decaffeinated form of tea manufactured commercially in Assam, North Eastern part of India. The results display that phenolic/flavonoid content well correlated with antioxidant activity which was performed by DPPH (2,2-diphenyl-1-picrylhydrazyl) and FRAP (Ferric reducing ability of plasma) assay. After decaffeination there is a decrease in the polyphenols concentration which also affects the antioxidant activity of green tea. For the enrichment of antioxidant activity of decaffeinated tea a herbal plant extract is used which shows a synergistic effect between green tea and herbal plant phenolic compounds. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title="antioxidant activity">antioxidant activity</a>, <a href="https://publications.waset.org/abstracts/search?q=decaffeination" title=" decaffeination"> decaffeination</a>, <a href="https://publications.waset.org/abstracts/search?q=green%20tea" title=" green tea"> green tea</a>, <a href="https://publications.waset.org/abstracts/search?q=flavonoid%20content" title=" flavonoid content"> flavonoid content</a>, <a href="https://publications.waset.org/abstracts/search?q=phenolic%20content" title=" phenolic content"> phenolic content</a>, <a href="https://publications.waset.org/abstracts/search?q=plant%20extract" title=" plant extract"> plant extract</a> </p> <a href="https://publications.waset.org/abstracts/40137/enrichment-of-the-antioxidant-activity-of-decaffeinated-assam-green-tea-by-herbal-plant-a-synergistic-effect" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/40137.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">6612</span> In vitro Synergistic Antioxidant Activity of Honey-Mentha Spicata Combination</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yuva%20Bellik">Yuva Bellik</a>, <a href="https://publications.waset.org/abstracts/search?q=Selles%20Mohamed%20Amar"> Selles Mohamed Amar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The beneficial health effects including antioxidant properties of mint (Mentha spicata) and honey bees (Apis mellifera) have been extensively studied. However, there is no data about the effects of their associated use. In this study the total phenolic and flavonoid contents for individual extracts of mint and honey and their combination were determined. The antioxidant activity was investigated by using reducing power, 1,1-diphenyl-2-picrylhydrazyl (DPPH), 2,2´- azinobis-(3-ethylbenzothiazoline-6-sulphonic acid diamonium salt (ABTS), and chelating power methods. The results showed that individual extracts contained important quantity of phenolics and flavonoids and their combination was found to produce best antioxidant activity. A significant linear correlation between the phenolic/flavonoid contents and antioxidant activity, especially with reducing power and free radical scavenging abilities, was observed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=honey" title="honey">honey</a>, <a href="https://publications.waset.org/abstracts/search?q=mint" title=" mint"> mint</a>, <a href="https://publications.waset.org/abstracts/search?q=synergy" title=" synergy"> synergy</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title=" antioxidant activity"> antioxidant activity</a> </p> <a href="https://publications.waset.org/abstracts/23244/in-vitro-synergistic-antioxidant-activity-of-honey-mentha-spicata-combination" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/23244.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">389</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">6611</span> In-vitro Antioxidant Activity of Two Selected Herbal Medicines</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Vinotha">S. Vinotha</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20Thabrew"> I. Thabrew</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Sri%20Ranjani"> S. Sri Ranjani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hot aqueous and methanol extracts of the two selected herbal medicines such are Vellarugu Chooranam (V.C) and Amukkirai Chooranam (A.C) were examined for total phenolic and flavonoid contents and in-vitro antioxidant activity using four different methods. The total phenolic and flavonoid contents in methanol extract of V.C were found to be higher (44.41±1.26 mg GAE⁄g; 174.44±9.32 mg QE⁄g) than in the methanol extract of A.C (20.56±0.67 mg GAE⁄g;7.21±0.85 mg QE⁄g). Hot methanol and aqueous extracts of both medicines showed low antioxidant activity in DPPH, ABTS, and FRAP methods and Iron chelating activity not found at highest possible concentration. V.C contains higher concentrations of total phenolic and flavonoid contents than A.C and can also exert greater antioxidant activity than A.C, although the activities demonstrated were lower than the positive control Trolox. The in-vitro antioxidant activity was not related with the total phenolic and flavonoid contents of the methanol and aqueous extracts of both herbal medicines (A.C and V.C). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=activity" title="activity">activity</a>, <a href="https://publications.waset.org/abstracts/search?q=different%20extracts" title=" different extracts"> different extracts</a>, <a href="https://publications.waset.org/abstracts/search?q=herbal%20medicines" title=" herbal medicines"> herbal medicines</a>, <a href="https://publications.waset.org/abstracts/search?q=in-vitro%20antioxidant" title=" in-vitro antioxidant"> in-vitro antioxidant</a> </p> <a href="https://publications.waset.org/abstracts/16823/in-vitro-antioxidant-activity-of-two-selected-herbal-medicines" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16823.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">405</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">6610</span> Antioxidant Activity and Chemical Constituents of Leaf Essential Oils of Pseuduvaria Monticola and Pseuduvaria Macrophylla (Annonaceae)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hairin%20Taha">Hairin Taha</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20Narrima"> P. Narrima</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20A.%20Hapipah"> M. A. Hapipah</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20M.%20Mustafa"> A. M. Mustafa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The chemical constituents and antioxidant activity of the leaf essential oils of Pseuduvaria monticola and Pseuduvaria macrophylla from the Annonaceae family were investigated. GC-TOFMS analyses identified 46 compounds from Pseuduvaria monticola and 11 compounds from Pseuduvaria macrophylla. The major constituents in the leaf essential oil of Pseuduvaria monticola were a-cadinol (13.0%), calamenene-cis (6.9%), alfa copaene (4%), and epizonarene (3.8%), while in the leaf essential oil of Pseuduvaria macrophylla were caryophyllene oxide (29.7%) and elimicin (28%). The antioxidant activity of both the essential oils were determined using the 2,2'-diphenyl-1-picrylhydrazyl assay (DPPH). The present study suggests that both essential oils demonstrated good antioxidant activity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pseuduvaria%20monticola" title="Pseuduvaria monticola">Pseuduvaria monticola</a>, <a href="https://publications.waset.org/abstracts/search?q=Pseuduvaria%20macrophylla" title=" Pseuduvaria macrophylla"> Pseuduvaria macrophylla</a>, <a href="https://publications.waset.org/abstracts/search?q=leaf%20essential%20oils" title=" leaf essential oils"> leaf essential oils</a>, <a href="https://publications.waset.org/abstracts/search?q=GC-MSTOF" title=" GC-MSTOF"> GC-MSTOF</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title=" antioxidant activity"> antioxidant activity</a> </p> <a href="https://publications.waset.org/abstracts/20076/antioxidant-activity-and-chemical-constituents-of-leaf-essential-oils-of-pseuduvaria-monticola-and-pseuduvaria-macrophylla-annonaceae" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/20076.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">381</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">6609</span> In vitro Antioxidant Activity of Caesalpinia sappan Extract</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Monthon%20Tangjitmungman">Monthon Tangjitmungman</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Numerous diseases have been linked to oxidative stress, in which a disproportion of free radicals in the body leads to tissue or cell damage. Polyphenols are the most abundant antioxidants found in plants, and they are highly effective at scavenging oxidative free radicals. Due to the presence of phenolic compounds in Caesalpinia sappan has been discovered to have antioxidant activity. It has several health benefits, the most important of which is preventing cardiovascular and cancer diseases. This study aimed to determine the phenolic content and antioxidant activity of C. sappan extract using a variety of antioxidant assays. The extract of C. sappan was made using a mixture of solvents (ethyl alcohol: water in ratio 8:2). The total phenolic content of C. sappan extract was determined and expressed as gallic acid equivalents using the Folin-Cioucalteu method (GAE). The antioxidant activity of C. sappan extract was assessed using the 2, 2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging assay and the ABTS radical scavenging capacity assay. An association was found between antioxidant activity and total phenol content. The antioxidant activity of C. sappan extract was also determined by DPPH and ABTS assays. The IC50 values for C. sappan extract from DPPH and ABTS assays were 54.48 μg/mL ± 0.545 and 25.46 μg/mL ± 0.790, respectively, in the DPPH assay. In the DPPH assay, vitamin C was used as a positive control, whereas Trolox was used as a positive control in the ABTS assay. In conclusion, C. sappan extract contains a high level of total phenolics and exhibits significant antioxidant activity. Nevertheless, more research should be done on the antioxidant activity, such as SOD and ROS scavenging assays and in vivo experiments, to determine whether the compound has antioxidant activity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ABTS%20assay" title="ABTS assay">ABTS assay</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title=" antioxidant activity"> antioxidant activity</a>, <a href="https://publications.waset.org/abstracts/search?q=Caesalpinia%20sappan" title=" Caesalpinia sappan"> Caesalpinia sappan</a>, <a href="https://publications.waset.org/abstracts/search?q=DPPH%20assays" title=" DPPH assays"> DPPH assays</a>, <a href="https://publications.waset.org/abstracts/search?q=total%20phenolic%20content" title=" total phenolic content"> total phenolic content</a> </p> <a href="https://publications.waset.org/abstracts/140865/in-vitro-antioxidant-activity-of-caesalpinia-sappan-extract" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/140865.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">384</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">6608</span> Geoclimatic Influences on the Constituents and Antioxidant Activity of Extracts from the Fruit of Arbutus unedo L.</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Khadidja%20Bouzid">Khadidja Bouzid</a>, <a href="https://publications.waset.org/abstracts/search?q=Fouzia%20Benali%20Toumi"> Fouzia Benali Toumi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Bouzouina"> Mohamed Bouzouina </a> </p> <p class="card-text"><strong>Abstract:</strong></p> We made a comparison between the total phenolic content, concentrations of flavonoids and antioxidant activity of four different extracts (butanol, ethyl acetate, chloroform, water) of Arbutus unedo L. fruit (Ericacea) of El Marsa and Terni area. The total phenolic content in the extracts was determined using the Folin-Ciocalteu reagent and it ranged between 26.57 and 48.23 gallic acid equivalents mg/g of dry weight of extract. The concentrations of flavonoids in plant extracts varied from 17.98 to 56.84 catechin equivalents mg/g. The antioxidant activity was analyzed in vitro using the DPPH reagent; among all extracts, ethyl acetate fraction from El Marsa area showed the highest antioxidant activity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title="antioxidant activity">antioxidant activity</a>, <a href="https://publications.waset.org/abstracts/search?q=Arbutus%20unedo%20L." title=" Arbutus unedo L."> Arbutus unedo L.</a>, <a href="https://publications.waset.org/abstracts/search?q=fruit%20flavonoids" title=" fruit flavonoids"> fruit flavonoids</a>, <a href="https://publications.waset.org/abstracts/search?q=phenols" title=" phenols"> phenols</a>, <a href="https://publications.waset.org/abstracts/search?q=Western%20Algeria" title=" Western Algeria "> Western Algeria </a> </p> <a href="https://publications.waset.org/abstracts/16009/geoclimatic-influences-on-the-constituents-and-antioxidant-activity-of-extracts-from-the-fruit-of-arbutus-unedo-l" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16009.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">454</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">6607</span> Evaluation of Bioactive Phenols in Blueberries from Different Cultivars</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Christophe%20Gon%C3%A7alves">Christophe Gonçalves</a>, <a href="https://publications.waset.org/abstracts/search?q=Raquel%20P.%20F.%20Guin%C3%A9"> Raquel P. F. Guiné</a>, <a href="https://publications.waset.org/abstracts/search?q=Daniela%20Teixeira"> Daniela Teixeira</a>, <a href="https://publications.waset.org/abstracts/search?q=Fernando%20J.%20Gon%C3%A7alves"> Fernando J. Gonçalves</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Blueberries are widely valued for their high content in phenolic compounds with antioxidant activity, and hence beneficial for the human health. In this way, a study was done to determine the phenolic composition (total phenols, anthocyanins and tannins) and antioxidant activity of blueberries from three cultivars (Duke, Bluecrop, and Ozarblue) grown in two different Portuguese farms. Initially two successive extractions were done with methanol followed by two extractions with aqueous acetone solutions. These extracts obtained were then used to evaluate the amount of phenolic compounds and the antioxidant activity. The total phenols were observed to vary from 4.9 to 8.2 mg GAE/g fresh weight, with anthocyanin’s contents in the range 1.5-2.8 mg EMv3G/g and tannins contents in the range 1.5- 3.8 mg/g. The results for antioxidant activity ranged from 9.3 to 23.2 mol TE/g, and from 24.7 to 53.4 mol TE/g, when measured, respectively, by DPPH and ABTS methods. In conclusion it was observed that, in general, the cultivar had a visible effect on the phenols present, and furthermore, the geographical origin showed relevance either in the phenols contents or the antioxidant activity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=anthocyanins" title="anthocyanins">anthocyanins</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title=" antioxidant activity"> antioxidant activity</a>, <a href="https://publications.waset.org/abstracts/search?q=blueberry%20cultivar" title=" blueberry cultivar"> blueberry cultivar</a>, <a href="https://publications.waset.org/abstracts/search?q=geographical%20origin" title=" geographical origin"> geographical origin</a>, <a href="https://publications.waset.org/abstracts/search?q=phenolic%20compounds" title=" phenolic compounds"> phenolic compounds</a> </p> <a href="https://publications.waset.org/abstracts/22045/evaluation-of-bioactive-phenols-in-blueberries-from-different-cultivars" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22045.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">474</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">6606</span> γ-Irradiation of Oat β- Glucan: Effect on Antioxidant and Antiproliferative Properties </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Asima%20Shah">Asima Shah</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20A.%20Masoodi"> F. A. Masoodi</a>, <a href="https://publications.waset.org/abstracts/search?q=Adil%20Gani"> Adil Gani</a>, <a href="https://publications.waset.org/abstracts/search?q=Bilal%20Ahmad%20Ashwar"> Bilal Ahmad Ashwar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present study was designed to evaluate the effect of γ-rays on the antioxidant and antiproliferative potential of β-glucan isolated from oats. The β-glucan was irradiated with 0, 2, 6, and 10 kGy by gamma ray. The samples were characterized by FT-IR, GPC, and quantitative estimation by Megazyme β-glucan assay kit. The average molecular weight of non-irradiated β-glucan was 199 kDa that decreased to 70 kDa at 10 kGy. Both FT-IR spectrum and chemical analysis revealed that the extracted β-glucan was pure having minor impurities. Antioxidant activity was evaluated by DPPH, lipid peroxidation, reducing power, metal chelating ability and oxidative DNA damage assays. Results revealed that the antioxidant activity of β-glucan increased with the increase in irradiation dose. Irradiated β-glucan also exhibited dose dependent cancer cell growth inhibition with irradiation doses. The study revealed that low molecular weight β-glucan with enhanced antioxidant and antiproliferative activities can be produced by a simple irradiation method. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=%CE%B3-irradiation" title="γ-irradiation">γ-irradiation</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title=" antioxidant activity"> antioxidant activity</a>, <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=%CE%B2-glucan" title=" β-glucan"> β-glucan</a>, <a href="https://publications.waset.org/abstracts/search?q=oats" title=" oats"> oats</a> </p> <a href="https://publications.waset.org/abstracts/17343/gh-irradiation-of-oat-v-glucan-effect-on-antioxidant-and-antiproliferative-properties" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17343.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">457</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">6605</span> Polyphenol and Antimicrobial Activity in Olive Oil from Algeria</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kamel%20Zemour">Kamel Zemour</a>, <a href="https://publications.waset.org/abstracts/search?q=Kada%20Mohamed%20Amine%20Chouhim"> Kada Mohamed Amine Chouhim</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Mairif"> Mohamed Mairif</a>, <a href="https://publications.waset.org/abstracts/search?q=Tadj%20Eddine%20Adda%20Ardjan"> Tadj Eddine Adda Ardjan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Many recent studies show the positive effect of phenolic compounds in olive oil on health. They are known for their biological properties, where they have shown potential activity as an antioxidant, anti-inflammatory, and antimicrobial agents. However, this characteristic is rarely studied in olive oil from different regions of Algeria. Different samples collected from the western region of Algeria were evaluated for their polyphenol content, antioxidant activity, and antimicrobial effect. The obtained results demonstrated that this oil is rich in polyphenols and revealed high antimicrobial activity against Staphylococcus aureus and Escherichia coli. Finally, this study has highlighted the nutritional and pharmaceutical importance of olive oil grown in Algeria. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=olive%20oil" title="olive oil">olive oil</a>, <a href="https://publications.waset.org/abstracts/search?q=polyphenols" title=" polyphenols"> polyphenols</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title=" antioxidant activity"> antioxidant activity</a>, <a href="https://publications.waset.org/abstracts/search?q=antimicrobial%20activity" title=" antimicrobial activity"> antimicrobial activity</a> </p> <a href="https://publications.waset.org/abstracts/159649/polyphenol-and-antimicrobial-activity-in-olive-oil-from-algeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/159649.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">152</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">6604</span> In vitro Antioxidant Activity of Derris scandens Extract</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nattawit%20Thiapairat">Nattawit Thiapairat</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Multiple diseases have been linked to excessive levels of free radicals, which cause tissue or cell damage as a result of oxidative stress. Many plants are sources of high antioxidant activity. Derris scandens has a high amount of phenolic and flavonoid contents which demonstrated good biological activities. This study focused on the antioxidant activity of polyphenols extracted from D. scandens. This study performs total flavonoids content and various antioxidant assays, which were 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging capacity assays. The total flavonoid content of D. scandens extract was determined and expressed as quercetin equivalents (QE)/g measured by the aluminum chloride colorimetric method. The antioxidant activity of D. scandens extract was also determined by DPPH and ABTS assays. In the DPPH assay, vitamin C was used as a positive control, whereas Trolox was used as a positive control in the ABTS assay. The half-maximal inhibitory concentration (IC50) values for D. scandens extract from DPPH and ABTS assays were 41.79 μg/mL ± 0.783 and 29.42 μg/mL ± 0.890, respectively, in the DPPH assay. To conclude, D. scandens extract consists of a high amount of total phenolic content, which exhibits a significant antioxidant activity. However, further investigation regarding antioxidant activity such as SOD, ROS, and RNS scavenging assays and in vivo experiments should be performed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ABTS%20assay" title="ABTS assay">ABTS assay</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title=" antioxidant activity"> antioxidant activity</a>, <a href="https://publications.waset.org/abstracts/search?q=Derris%20scandens" title=" Derris scandens"> Derris scandens</a>, <a href="https://publications.waset.org/abstracts/search?q=DPPH%20assays" title=" DPPH assays"> DPPH assays</a>, <a href="https://publications.waset.org/abstracts/search?q=total%20flavonoid%20content" title=" total flavonoid content"> total flavonoid content</a> </p> <a href="https://publications.waset.org/abstracts/141175/in-vitro-antioxidant-activity-of-derris-scandens-extract" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/141175.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">213</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">6603</span> Screening of Antioxidant Activity of Exopolysaccharides Produced by Lactic Acid Bacteria From Human Origin</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pi%C3%B1a-Ronces%20Laura%20Gabriela">Piña-Ronces Laura Gabriela</a>, <a href="https://publications.waset.org/abstracts/search?q=Reyes-Escogido%20Mar%C3%ADa%20de%20Lourdes"> Reyes-Escogido María de Lourdes</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Exist a large variability in Exopolysaccharides (EPS) produced by LAB depending on carbon source, they have multiple applications in food industry mainly, but they have become important for the health. In this study, we identified EPS-producing strains belonging to the BAL group; they were previously isolated from humans. After that, we extracted and evaluated the antioxidant activity of EPS produced by all strains. Antioxidant activity was determined by DPPH method using ascorbic acid as standard for both comparison and quantification. 31 strains (51.66 %) produced EPS at concentrations between 451 and 1.561 mg/l, 16 of EPS extracted showed antioxidant effect superior to ascorbic acid at the same concentrations. EPS-producing strains were L. plantarum, L. sp and L. fermentum corresponding to Lactobacillus genus and, E. faecium, E. durans, and E. hirae of Enterococcus genus. Antioxidant activity showed by EPS from 3 strains of L. plantarum and 3 strains of E. faecium was different into specie, while the antioxidant activity determined for EPS obtained from the other strains did not show difference at specie level, but was superior to ascorbic acid. EPS produced by L. plantarum and E. hirae had the best activity, it could be considerate for selection them as a possible new alternative for therapy or treatment of diseases related whit oxidative stress. Further studies about biological functions of EPS have to be conducted for new applications in health. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=oxidative%20stress" title="oxidative stress">oxidative stress</a>, <a href="https://publications.waset.org/abstracts/search?q=lactic%20acid%20bacteria" title=" lactic acid bacteria"> lactic acid bacteria</a>, <a href="https://publications.waset.org/abstracts/search?q=exopolysaccharides" title=" exopolysaccharides"> exopolysaccharides</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title=" antioxidant activity"> antioxidant activity</a> </p> <a href="https://publications.waset.org/abstracts/17968/screening-of-antioxidant-activity-of-exopolysaccharides-produced-by-lactic-acid-bacteria-from-human-origin" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17968.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">360</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">6602</span> Evaluation of Antioxidant Activities of Cabbage (Brassica oleracea L. var. capitata L.)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rutanachai%20Thaipratum">Rutanachai Thaipratum</a> </p> <p class="card-text"><strong>Abstract:</strong></p> At present, it is widely-known that free radicals are the causes of illness such as cancers, coronary heart disease, Alzheimer’s disease and aging. One method of protection from free radical is the consumption of antioxidant-containing foods or herbs. Several analytical methods have been used for qualitative and quantitative determination of antioxidants. This project aimed to evaluate antioxidant activity of ethanolic and aqueous extracts from cabbage (Brassicca oleracea L. var. capitata L.) measured by DPPH and hydroxyl radical scavenging method. The results show that averaged antioxidant activity measured in ethanolic extract (µmol ascorbic acid equivalent/g fresh mass) were 7.316 ± 0.715 and 4.66 ± 1.029 as determined by DPPH and hydroxyl radical scavenging activity assays, respectively. Averaged antioxidant activity measured in aqueous extract (µmol ascorbic acid equivalent/g fresh mass) were 15.141 ± 2.092 and 4.955 ± 1.975 as determined by DPPH and hydroxyl radical scavenging activity assays respectively. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=free%20radical" title="free radical">free radical</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant" title=" antioxidant"> antioxidant</a>, <a href="https://publications.waset.org/abstracts/search?q=cabbage" title=" cabbage"> cabbage</a>, <a href="https://publications.waset.org/abstracts/search?q=Brassica%20oleracea%20L.%20var.%20capitata%20L." title=" Brassica oleracea L. var. capitata L. "> Brassica oleracea L. var. capitata L. </a> </p> <a href="https://publications.waset.org/abstracts/9765/evaluation-of-antioxidant-activities-of-cabbage-brassica-oleracea-l-var-capitata-l" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/9765.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">388</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">6601</span> Antioxidant Activity of Selected Medicinal Plants Used in Folk Medicine in Libya</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Salmin%20Alshalmani">Salmin Alshalmani</a>, <a href="https://publications.waset.org/abstracts/search?q=Ghazall%20M%20Benhusein"> Ghazall M Benhusein</a>, <a href="https://publications.waset.org/abstracts/search?q=Ebtisam%20Alhadi%20Absomaha"> Ebtisam Alhadi Absomaha</a>, <a href="https://publications.waset.org/abstracts/search?q=Marwa%20I.%20Meshri"> Marwa I. Meshri</a>, <a href="https://publications.waset.org/abstracts/search?q=Hamdoon%20A.%20Mohammed"> Hamdoon A. Mohammed</a>, <a href="https://publications.waset.org/abstracts/search?q=Jamal%20Mezogi"> Jamal Mezogi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Eight wild medicinal plants used by Libyan and growing in Al-Jebel Al-Akhdar, Libya were suspected to estimate the antioxidant activity using 2,2-Diphenyl-1-Picrylhydrazyl stable free radical (DPPH). Incidences of purple colour reduction of the DPPH by testing extracts in addition to quercetin and vitamin C as positive controls reflect its ability to scavenge free radicals. All testing plants extract showed noticeable strength as antioxidant regarding its abilities to scavenge DPPH with an especial regards to Sarcopoterium spinosum. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antioxidant" title="antioxidant">antioxidant</a>, <a href="https://publications.waset.org/abstracts/search?q=scavenging%20activity" title=" scavenging activity"> scavenging activity</a>, <a href="https://publications.waset.org/abstracts/search?q=folk%20medicine" title=" folk medicine"> folk medicine</a>, <a href="https://publications.waset.org/abstracts/search?q=methanol%20extracts" title=" methanol extracts "> methanol extracts </a> </p> <a href="https://publications.waset.org/abstracts/16036/antioxidant-activity-of-selected-medicinal-plants-used-in-folk-medicine-in-libya" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/16036.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">601</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">6600</span> Biological Activity of Hibiscus sabdariffa Extract</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chanasit%20Chaocharoenphat">Chanasit Chaocharoenphat</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hibiscus sabdariffa is a herbal plant that is commonly used for home remedies in Thailand. This study aims to determine the antioxidant activity of polyphenols, as oxidative stress plays a vital role in the development of cancer, and H. sabdariffa was used in this study. The total flavonoids content was determined using the aluminium chloride colourimetric method and expressed as quercetin equivalents (QE)/g and the antioxidant capacity of the flavonoids using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging capacity assays. The IC50 values of H. sabdariffa extract were 167.14 μg/mL ± 0.843 and 77.59 μg/mL ± 0.798, respectively. In the DPPH assay, vitamin C was used as a positive control, whereas Trolox was used as a positive control in the ABTS assay. To summarise, H. sabdariffa extract contains a high concentration of total flavonoids and exhibits potent antioxidant activity. However, additional antioxidant activity assays such as superoxide dismutase (SOD), reactive oxygen species (ROS), and reactive nitrogen species (RNS) scavenging assays and in vitro antioxidant experiments should be carried out to investigate the molecular mechanism of the compound. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ABTS%20assay" title="ABTS assay">ABTS assay</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title=" antioxidant activity"> antioxidant activity</a>, <a href="https://publications.waset.org/abstracts/search?q=Gracilaria%20fisheri" title=" Gracilaria fisheri"> Gracilaria fisheri</a>, <a href="https://publications.waset.org/abstracts/search?q=DPPH%20assays" title=" DPPH assays"> DPPH assays</a>, <a href="https://publications.waset.org/abstracts/search?q=total%20flavonoid%20content" title=" total flavonoid content"> total flavonoid content</a> </p> <a href="https://publications.waset.org/abstracts/140790/biological-activity-of-hibiscus-sabdariffa-extract" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/140790.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">242</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">6599</span> Investigation of Growth Yield and Antioxidant Activity of Monascus purpureus Extract Isolated from Stirred Tank Bioreactor</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Pourshirazi">M. Pourshirazi</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Esmaelifar"> M. Esmaelifar</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Aliahmadi"> A. Aliahmadi</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Yazdian"> F. Yazdian</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20S.%20Hatamian%20Zarami"> A. S. Hatamian Zarami</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20J.%20Ashrafi"> S. J. Ashrafi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Monascus purpureus is an antioxidant-producing fungus whose secondary metabolites can be used in drug industries. The growth yield and antioxidant activity of extract were investigated in 3-L liquid fermentation media in a 5-L stirred tank bioreactor (STD) at 30°C, pH 5.93 and darkness for 4 days with 150 rpm agitation and 40% dissolved oxygen. Results were compared to extract isolated from Erlenmeyer flask with the same condition. The growth yield was 0.21 and 0.17 in STD condition and Erlenmeyer flask, respectively. Furthermore, the IC50 of DPPH scavenging activity was 256.32 µg/ml and 150.43 µg/ml for STD extract and flask extract, respectively. Our data demonstrated that transferring the growth condition into the STD caused an increase in growth yield but not in antioxidant activity. Accordingly, there is no relationship between growth rate and secondary metabolites formation. More studies are needed to determine the mass transfer coefficient and also evaluating the hydrodynamic condition have to be done in the future studies. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Monascus%20purpureus" title="Monascus purpureus">Monascus purpureus</a>, <a href="https://publications.waset.org/abstracts/search?q=bioreactor" title=" bioreactor"> bioreactor</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant" title=" antioxidant"> antioxidant</a>, <a href="https://publications.waset.org/abstracts/search?q=growth%20yield" title=" growth yield"> growth yield</a> </p> <a href="https://publications.waset.org/abstracts/9632/investigation-of-growth-yield-and-antioxidant-activity-of-monascus-purpureus-extract-isolated-from-stirred-tank-bioreactor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/9632.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">404</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">6598</span> Synthesis of [1-(Substituted-Sulfonyl)-Piperidin-4-yl]-(2,4-Difluoro-Phenyl)-Methanone Oximes and Their Biological Activity</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=L.%20Mallesha">L. Mallesha</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20S.%20Karthik"> C. S. Karthik</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20Mallu"> P. Mallu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A series of new [1-(substituted-benzoyl)-piperidin-4-yl]-(2,4-difluoro-phenyl)-methanone oxime derivatives, 3(a-f) were synthesized and characterized by different spectral studies. All compounds were evaluated for their in vitro antibacterial activity against bacterial strains. These compounds were screened for their antioxidant activity by DPPH• and Fe2+ chelating assay. Antiproliferative effects were evaluated using the MTT assay method against two human cancer cell lines and one astrocytoma brain tumor cell line. Compound 3b exhibited moderate antibacterial activity when compared with other compounds. All the compounds showed antioxidant activity, where compound 3f was the best radical scavenger and Fe2+ ion scavenger. Compounds, 3b, and 3d showed good activity on all cell lines, whereas the other compounds in the series exhibited moderate activity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Piperidine" title="Piperidine">Piperidine</a>, <a href="https://publications.waset.org/abstracts/search?q=antibacterial" title=" antibacterial"> antibacterial</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant" title=" antioxidant"> antioxidant</a>, <a href="https://publications.waset.org/abstracts/search?q=antiproliferative" title=" antiproliferative"> antiproliferative</a> </p> <a href="https://publications.waset.org/abstracts/46525/synthesis-of-1-substituted-sulfonyl-piperidin-4-yl-24-difluoro-phenyl-methanone-oximes-and-their-biological-activity" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/46525.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">412</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">6597</span> Antibacterial and Antioxidant Activities of Artemisia herba-alba Asso Essential Oil Growing in M’sila (Algeria)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Asma%20Meliani">Asma Meliani</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Lakehal"> S. Lakehal</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Z.%20Benrebiha"> F. Z. Benrebiha</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20Chaouia"> C. Chaouia</a> </p> <p class="card-text"><strong>Abstract:</strong></p> There is an increasing interest in phytochemicals as new source of natural antioxidant and antimicrobial agents. Plants essential oils have come more into the focus of phytomedicine. Many researchers have reported various biological and/or pharmacological properties of Artemisia herba alba Asso essential oil. The present study describes antimicrobial and antioxidant properties of Artemisia herba alba Asso essential oil. Artemisia herba alba Asso essential oil obtained by hydrodistillation (using Clevenger type apparatus) growing in Algeria (M’sila) was analyzed by GC-MS. The essential oil yield of the study was 0.7%. The major components were found to be camphor, chrysanthenone et 1,8-cineole. The antimicrobial activity of the essential oil was tested against four bacteria (Gram-negative and Gram-positive) and three fungi using the diffusion method and by determining the inhibition zone. The oil was found to have significant antibacterial activity. In addition, antioxidant activity was determined by 1, 1-diphenyl-1-picrylhydrazyl (DPPH) assay, ferric reducing (FRAP) assay and β-carotene bleaching test, and high activity was found for Artemisia herba-alba oil. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Artemisia%20herba-alba" title="Artemisia herba-alba">Artemisia herba-alba</a>, <a href="https://publications.waset.org/abstracts/search?q=essential%20oil" title=" essential oil"> essential oil</a>, <a href="https://publications.waset.org/abstracts/search?q=antibacterial%20activity" title=" antibacterial activity"> antibacterial activity</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title=" antioxidant activity"> antioxidant activity</a> </p> <a href="https://publications.waset.org/abstracts/15986/antibacterial-and-antioxidant-activities-of-artemisia-herba-alba-asso-essential-oil-growing-in-msila-algeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/15986.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">333</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">6596</span> Study of the Effect of Extraction Solvent on the Content of Total Phenolic, Total Flavonoids and the Antioxidant Activity of an Endemic Medicinal Plant Growing in Morocco</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Aghoutane%20Basma">Aghoutane Basma</a>, <a href="https://publications.waset.org/abstracts/search?q=Naama%20Amal"> Naama Amal</a>, <a href="https://publications.waset.org/abstracts/search?q=Talbi%20Hayat"> Talbi Hayat</a>, <a href="https://publications.waset.org/abstracts/search?q=El%20Manfalouti%20Hanae"> El Manfalouti Hanae</a>, <a href="https://publications.waset.org/abstracts/search?q=Kartah%20Badreddine"> Kartah Badreddine</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Aromatic and medicinal plants are used by man for different needs, including food and medicinal needs for their biological properties attributed mainly to phenolic compounds and for their antioxidant capacity. In our study, the aim is to compare three extraction solvents by evaluating the contents of phenolic compounds, the contents of flavonoids, and the antioxidant activities of extracts from different methods of extracting the aerial part of an endemic medicinal plant from Morocco. This activity was also confirmed by three methods (2,2-diphenyl-1-picrylhydrazyl (DPPH), antioxidant reducing power of iron (FRAP), and total antioxidant capacity (CAT)). The results showed that this plant is rich in polyphenols and flavonoids, as well as it has a very important antioxidant capacity in whatever the solvent or the extraction method. This suggests the importance of using extracts from this plant as a new natural source of food additives and potent antioxidants in the food industry. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=endemic%20plant%20of%20Morocco" title="endemic plant of Morocco">endemic plant of Morocco</a>, <a href="https://publications.waset.org/abstracts/search?q=phenolic%20compound" title=" phenolic compound"> phenolic compound</a>, <a href="https://publications.waset.org/abstracts/search?q=solvent" title=" solvent"> solvent</a>, <a href="https://publications.waset.org/abstracts/search?q=extraction%20technique" title=" extraction technique"> extraction technique</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title=" antioxidant activity"> antioxidant activity</a> </p> <a href="https://publications.waset.org/abstracts/142337/study-of-the-effect-of-extraction-solvent-on-the-content-of-total-phenolic-total-flavonoids-and-the-antioxidant-activity-of-an-endemic-medicinal-plant-growing-in-morocco" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/142337.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">298</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">6595</span> Antibacterial and Antioxidant Properties of Artemisia herba-alba Asso Essential Oil Growing in M’sila, Algeria</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Asma%20Meliani">Asma Meliani</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Lakehal"> S. Lakehal</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Z.%20Benrebiha"> F. Z. Benrebiha</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20Chaouia"> C. Chaouia</a> </p> <p class="card-text"><strong>Abstract:</strong></p> There is an increasing interest in phytochemicals as new source of natural antioxidant and antimicrobial agents. Plants essential oils have come more into the focus of phytomedicine. Many researchers have reported various biological and/or pharmacological properties of Artemisia herba alba Asso essential oil. The present study describes antimicrobial and antioxidant properties of Artemisia herba alba Asso essential oil. Artemisia herba alba Asso essential oil obtained by hydrodistillation (using Clevenger type apparatus) growing in Algeria (M’sila) was analyzed by GC-MS. The essential oil yield of the study was 0.7 %. The major components were found to be camphor, chrysanthenone et 1,8-cineole. The antimicrobial activity of the essential oil was tested against four bacteria (Gram-negative and Gram-positive) and one fungi using the diffusion method and by determining the inhibition zone. The oil was found to have significant antibacterial activity. In addition, antioxidant activity was determined by 1,1-diphenyl-1-picrylhydrazyl (DPPH) assay, ferric reducing (FRAP) assay and β-carotene bleaching test, and high activity was found for Artemisia herba-alba oil. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Artemisia%20herba-alba" title="Artemisia herba-alba">Artemisia herba-alba</a>, <a href="https://publications.waset.org/abstracts/search?q=essential%20oil" title=" essential oil"> essential oil</a>, <a href="https://publications.waset.org/abstracts/search?q=antibacterial%20activity" title=" antibacterial activity"> antibacterial activity</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title=" antioxidant activity"> antioxidant activity</a> </p> <a href="https://publications.waset.org/abstracts/18124/antibacterial-and-antioxidant-properties-of-artemisia-herba-alba-asso-essential-oil-growing-in-msila-algeria" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18124.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">470</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">6594</span> Antioxidant Activity of Aristolochia longa L. Extracts</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Merouani%20Nawel">Merouani Nawel</a>, <a href="https://publications.waset.org/abstracts/search?q=Belhattab%20Rachid"> Belhattab Rachid</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Aristolochia longa L. (Aristolochiacea) is a native plant of Algeria used in traditional medicine. This study was devoted to the determination of polyphenols, flavonoids, and condensed tannins contents of Aristolochia longa L. after their extraction by using various solvents with different polarities (methanol, acetone and distilled water). These extracts were prepared from stem, leaves, fruits and rhizome. The antioxidant activity was determined using three in vitro assays methods: scavenging effect on DPPH, the reducing power assay and ẞ-carotene bleaching inhibition (CBI). The results obtained indicate that the acetone extracts from the aerial parts presented the highest contents of polyphenols. The results of The antioxidant activity showed that all extracts of Aristolochia longa L., prepared using different solvent, have diverse antioxidant capacities. However, the aerial parts methanol extract exhibited the highest antioxidant capacity of DPPH and reducing power (Respectively 55,04ug/ml±1,29 and 0,2 mg/ml±0,019 ). Nevertheless, the aerial parts acetone extract showed the highest antioxidant capacity in the test of ẞ-carotene bleaching inhibition with 57%. These preliminary results could be used to justify the traditional use of this plant and their bioactive substances could be exploited for therapeutic purposes such as antioxidant and antimicrobial. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aristolochia%20longa%20l." title="aristolochia longa l.">aristolochia longa l.</a>, <a href="https://publications.waset.org/abstracts/search?q=polyphenols" title=" polyphenols"> polyphenols</a>, <a href="https://publications.waset.org/abstracts/search?q=flavonoids" title=" flavonoids"> flavonoids</a>, <a href="https://publications.waset.org/abstracts/search?q=condensed%20tannins" title=" condensed tannins"> condensed tannins</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title=" antioxidant activity"> antioxidant activity</a> </p> <a href="https://publications.waset.org/abstracts/41824/antioxidant-activity-of-aristolochia-longa-l-extracts" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/41824.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">251</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">6593</span> Phytochemical Study and Biological Activity of Sage (Salvia officinalis L.)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mekhaldi%20Abdelkader">Mekhaldi Abdelkader</a>, <a href="https://publications.waset.org/abstracts/search?q=Bouzned%20Ahcen"> Bouzned Ahcen</a>, <a href="https://publications.waset.org/abstracts/search?q=Djibaoui%20Rachid"> Djibaoui Rachid</a>, <a href="https://publications.waset.org/abstracts/search?q=Hamoum%20Hakim"> Hamoum Hakim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study presents an attempt to evaluate the antioxidant and antimicrobial activity of methanolic extract and essential oils prepared from the leaves of sage (Salvia officinalis L.). The content of polyphenols in the methanolic extract of the leaves from Salvia officinalis extract was determined by spectrophoto- metrically, calculated as gallic acid and catechin equivalent. Antioxidant activity was evaluated by free radical scavenging activity using 2,2-diphenylpicryl-1-picrylhydrazyl (DPPH) assay. The plant essential oil and methanol extract were also subjected to screenings for the evaluation of their antioxidant activities using 2, 2-diphenyl-1-picrylhydrazyl (DPPH) test. While the plant essential oil showed only weak antioxidant activities, its methanol extract was considerably active in DPPH (IC50= 37.29µg/ml) test. Appreciable total phenolic content (31.25mg/g) was also detected for the plant methanol extract as gallic acid equivalent in the Folin–Ciocalteu test. The plant was also screened for its antimicrobial activity and good to moderate inhibitions were recorded for its essential oil and methanol extract against most of the tested microorganisms. The present investigation revealed that this plant has rich source of antioxidant properties. It is for this reason that sage has found increasing application in food formulations. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antibacterial%20activity" title="antibacterial activity">antibacterial activity</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20activity" title=" antioxidant activity"> antioxidant activity</a>, <a href="https://publications.waset.org/abstracts/search?q=flavonoid" title=" flavonoid"> flavonoid</a>, <a href="https://publications.waset.org/abstracts/search?q=polyphenol" title=" polyphenol"> polyphenol</a>, <a href="https://publications.waset.org/abstracts/search?q=salvia%20officinalis" title=" salvia officinalis "> salvia officinalis </a> </p> <a href="https://publications.waset.org/abstracts/15899/phytochemical-study-and-biological-activity-of-sage-salvia-officinalis-l" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/15899.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">409</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">6592</span> Antioxidant Activities, Chemical Components, Physicochemical, and Sensory Characteristics of Kecombrang Tea (Etlingera elatior)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rifda%20Naufalin">Rifda Naufalin</a>, <a href="https://publications.waset.org/abstracts/search?q=Nurul%20Latifasari"> Nurul Latifasari</a>, <a href="https://publications.waset.org/abstracts/search?q=Siti%20Nuryanti"> Siti Nuryanti</a>, <a href="https://publications.waset.org/abstracts/search?q=Muna%20Ridha%20Hanifah"> Muna Ridha Hanifah</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Kecombrang is a Zingiberaceae plant which has antioxidant properties. The high antioxidant content in kecombrang flowers has the potential to be processed as a functional beverage raw material so that it can be used as an ingredient in making herbal teas. The purpose of this study was to determine the chemical components, physicochemistry, antioxidant activity and sensory characteristics of kecombrang tea. The research methodology was carried out by using a completely randomized design with processing factors of kecombrang tea namely blanching and non-blanching, fermentation and non-fermentation, and the optimal time for drying kecombrang tea. The best treatment combination based on the effective index method is the treatment of the blanching process followed by drying at a temperature of 50ᵒC until the 2% moisture content can produce kecombrang tea with a total phenol content of 5.95 mg Tannic Acid Equivalent (TAE) / gram db, total flavonoid 3%, pH 4.5, and antioxidant activity 82.95%, red color, distinctive aroma of tea, fresh taste, and preferred by panelists. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=kecombrang%20tea" title="kecombrang tea">kecombrang tea</a>, <a href="https://publications.waset.org/abstracts/search?q=blanching" title=" blanching"> blanching</a>, <a href="https://publications.waset.org/abstracts/search?q=fermentation" title=" fermentation"> fermentation</a>, <a href="https://publications.waset.org/abstracts/search?q=total%20phenol" title=" total phenol"> total phenol</a>, <a href="https://publications.waset.org/abstracts/search?q=and%20antioxidant%20activity" title=" and antioxidant activity"> and antioxidant activity</a> </p> <a href="https://publications.waset.org/abstracts/106909/antioxidant-activities-chemical-components-physicochemical-and-sensory-characteristics-of-kecombrang-tea-etlingera-elatior" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/106909.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> <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=antioxidant%20activity&page=2">2</a></li> <li class="page-item"><a class="page-link" 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