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spectroscopy</title> <meta name="description" content="Search results for: FTIR spectroscopy"> <meta name="keywords" content="FTIR spectroscopy"> <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="FTIR spectroscopy"> <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> 2408</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: FTIR spectroscopy</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2258</span> SEM and FTIR Study of Adsorption Characteristics Using Xanthate (KIBX) Synthesized Collectors on Sphalerite</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zohir%20Nedjar">Zohir Nedjar</a>, <a href="https://publications.waset.org/abstracts/search?q=Djamel%20Barkat"> Djamel Barkat</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Thiols such as alkyl xanthates are commonly used as collectors in the froth flotation of sulfide minerals. Under the concen-tration, pH and Eh conditions relevant to flotation, the thermodynamically favoured reaction between a thiol and a sulfide mineral surface is charge transfechemisorption in which the collector becomes bonded to metal atoms in the outermost layer of the sulfide lattice. The adsorption of potassium isobutyl xanthate (KIBX 3.10-3M) on sphalerite has been also studied using electrochemical potential, FTIR technique and SEM. Non activated minerals and minerals activated with copper sulfate (10-4 M) and copper nitrate (10-4 M) have been investigated at pH = 7.5. Surface species have been identified by FTIR and correlated with SEM. After copper sulfate activation, copper xanthate exists on all of the minerals studied. Neutral pH is most favorable for potassium isobutyl xanthate adsorption on sphalerite. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=flotation" title="flotation">flotation</a>, <a href="https://publications.waset.org/abstracts/search?q=adsorption" title=" adsorption"> adsorption</a>, <a href="https://publications.waset.org/abstracts/search?q=xanthate%20KIBX" title=" xanthate KIBX"> xanthate KIBX</a>, <a href="https://publications.waset.org/abstracts/search?q=sphalerite" title=" sphalerite"> sphalerite</a> </p> <a href="https://publications.waset.org/abstracts/11381/sem-and-ftir-study-of-adsorption-characteristics-using-xanthate-kibx-synthesized-collectors-on-sphalerite" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11381.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">2257</span> Preparation and Conductivity Measurements of LSM/YSZ Composite Solid Oxide Electrolysis Cell Anode Materials</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Christian%20C.%20Vaso">Christian C. Vaso</a>, <a href="https://publications.waset.org/abstracts/search?q=Rinlee%20Butch%20M.%20Cervera"> Rinlee Butch M. Cervera</a> </p> <p class="card-text"><strong>Abstract:</strong></p> One of the most promising anode materials for solid oxide electrolysis cell (SOEC) application is the Sr-doped LaMnO<sub>3</sub> (LSM) which is known to have a high electronic conductivity but low ionic conductivity. To increase the ionic conductivity or diffusion of ions through the anode, Yttria-stabilized Zirconia (YSZ), which has good ionic conductivity, is proposed to be combined with LSM to create a composite electrode and to obtain a high mixed ionic and electronic conducting anode. In this study, composite of lanthanum strontium manganite and YSZ oxide, La<sub>0.8</sub>Sr<sub>0.2</sub>MnO<sub>3</sub>/Zr<sub>0.92</sub>Y<sub>0.08</sub>O<sub>2</sub> (LSM/YSZ), with different wt.% compositions of LSM and YSZ were synthesized using solid-state reaction. The obtained prepared composite samples of 60, 50, and 40 wt.% LSM with remaining wt.% of 40, 50, and 60, respectively for YSZ were fully characterized for its microstructure by using powder X-ray diffraction (XRD), Thermogravimetric analysis (TGA), Fourier transform infrared (FTIR), and Scanning electron microscope/Energy dispersive spectroscopy (SEM/EDS) analyses. Surface morphology of the samples via SEM analysis revealed a well-sintered and densified pure LSM, while a more porous composite sample of LSM/YSZ was obtained. Electrochemical impedance measurements at intermediate temperature range (500-700 °C) of the synthesized samples were also performed which revealed that the 50 wt.% LSM with 50 wt.% YSZ (L50Y50) sample showed the highest total conductivity of 8.27x10<sup>-1</sup> S/cm at 600 <sup>o</sup>C with 0.22 eV activation energy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ceramics" title="ceramics">ceramics</a>, <a href="https://publications.waset.org/abstracts/search?q=microstructure" title=" microstructure"> microstructure</a>, <a href="https://publications.waset.org/abstracts/search?q=fuel%20cells" title=" fuel cells"> fuel cells</a>, <a href="https://publications.waset.org/abstracts/search?q=electrochemical%20impedance%20spectroscopy" title=" electrochemical impedance spectroscopy"> electrochemical impedance spectroscopy</a> </p> <a href="https://publications.waset.org/abstracts/60719/preparation-and-conductivity-measurements-of-lsmysz-composite-solid-oxide-electrolysis-cell-anode-materials" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/60719.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">247</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">2256</span> Photocatalytic Degradation of Naproxen in Water under Solar Irradiation over NiFe₂O₄ Nanoparticle System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=H.%20Boucheloukh">H. Boucheloukh</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Rouissa"> S. Rouissa</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Aoun"> N. Aoun</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Beloucifa"> M. Beloucifa</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20Sehili"> T. Sehili</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Parrino"> F. Parrino</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20Loddo"> V. Loddo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> To optimize water purification and wastewater treatment by heterogeneous photocatalysis, we used NiFe₂O₄ as a catalyst and solar irradiation as a source of energy. In this concept, an organic substance present in many industrial effluents was chosen: naproxen ((S)-6-methoxy-α-methyl-2-naphthaleneacetic acid or 2-(6-methoxynaphthalenyl) propanoic), a non-steroidal anti-inflammatory drug. The main objective of this study is to degrade naproxen by an iron and nickel catalyst, the degradation of this organic pollutant by nickel ferrite has been studied in a heterogeneous aqueous medium, with the study of the various factors influencing photocatalysis such as the concentration of matter and the acidity of the medium. The photocatalytic activity was followed by HPLC-UV andUV-Vis spectroscopy. A first-order kinetic model appropriately fitted the experimental data. The degradation of naproxen was also studied in the presence of H₂O₂ as well as in an aqueous solution. The new hetero-system NiFe₂O₄/oxalic acid is also discussed. The fastest naproxen degradation was obtained with NiFe₂O₄/H₂O₂. In a first-place, we detailed the characteristics of the material NiFe₂O₄, which was synthesized by the sol-gel methods, using various analytical techniques: visible UV spectrophotometry, X-ray diffraction, FTIR, cyclic voltammetry, luminescent discharge optical emission spectroscopy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=naproxen" title="naproxen">naproxen</a>, <a href="https://publications.waset.org/abstracts/search?q=nickelate" title=" nickelate"> nickelate</a>, <a href="https://publications.waset.org/abstracts/search?q=photocatalysis" title=" photocatalysis"> photocatalysis</a>, <a href="https://publications.waset.org/abstracts/search?q=oxalic%20acid" title=" oxalic acid"> oxalic acid</a> </p> <a href="https://publications.waset.org/abstracts/141299/photocatalytic-degradation-of-naproxen-in-water-under-solar-irradiation-over-nife2o4-nanoparticle-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/141299.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">209</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">2255</span> Removal of P-Nitrophenol in Wastewater by Using Fe-Nano Zeolite Synthesized</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pham-Thi%20Huong">Pham-Thi Huong</a>, <a href="https://publications.waset.org/abstracts/search?q=Byeong-Kyu%20Lee"> Byeong-Kyu Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=Chi-Hyeon%20Lee"> Chi-Hyeon Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=JiTae%20Kim"> JiTae Kim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study analyzed the removal of p-nitrophenol from wastewater using Fe-nano zeolite synthesized. The basic physical-chemical properties of Fe-nano zeolite was determined by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy. We focus on finding out the optimum conditions in adsorption and desorption processes for removal of p-nitrophenol by using Fe-nano zeolite in wastewater. The optimum pH for p-nitrophenol removal in wastewater was 5.0. Adsorption isotherms were better fitted with the Langmuir isotherm than with the Freundlich with 165.58 mg/g adsorption capacity of p-nitrophenol. These findings support potential of Fe-nano zeolite as an effective adsorbent for p-nitrophenol removal from wastewater. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fe-nano%20zeolite" title="Fe-nano zeolite">Fe-nano zeolite</a>, <a href="https://publications.waset.org/abstracts/search?q=adsorption" title=" adsorption"> adsorption</a>, <a href="https://publications.waset.org/abstracts/search?q=wastewater" title=" wastewater"> wastewater</a>, <a href="https://publications.waset.org/abstracts/search?q=regeneration" title=" regeneration"> regeneration</a> </p> <a href="https://publications.waset.org/abstracts/44511/removal-of-p-nitrophenol-in-wastewater-by-using-fe-nano-zeolite-synthesized" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/44511.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">311</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">2254</span> Water-Repellent Finishing on Cotton Fabric by SF₆ Plasma</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=We%27aam%20Alali">We'aam Alali</a>, <a href="https://publications.waset.org/abstracts/search?q=Ziad%20Saffour"> Ziad Saffour</a>, <a href="https://publications.waset.org/abstracts/search?q=Saker%20Saloum"> Saker Saloum</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Low-pressure, sulfur hexafluoride (SF₆) remote radio-frequency (RF) plasma, ignited in a hollow cathode discharge (HCD-L300) plasma system, has been shown to be a powerful method in cotton fabric finishing to achieve water-repellent property. This plasma was ignited at an SF6 flow rate of (200 cm), low pressure (0.5 mbar), and radio frequency (13.56 MHz) with a power of (300 W). The contact angle has been measured as a function of the plasma exposure period using the water contact angle measuring device (WCA), and the changes in the morphology, chemical structure, and mechanical properties as tensile strength and elongation at the break of the fabric have also been investigated using the scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDX), attenuated total reflectance Fourier transform Infrared spectroscopy (ATR-FTIR), and tensile test device, respectively. In addition, weight loss of the fabric and the fastness of washing have been studied. It was found that the exposure period of the fabric to the plasma is an important parameter. Moreover, a good water-repellent cotton fabric can be obtained by treating it with SF₆ plasma for a short time (1 min) without degrading its mechanical properties. Regarding the modified morphology of the cotton fabric, it was found that grooves were formed on the surface of the fibers after treatment. Chemically, the fluorine atoms were attached to the surface of the fibers. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cotton%20fabric" title="cotton fabric">cotton fabric</a>, <a href="https://publications.waset.org/abstracts/search?q=SEM" title=" SEM"> SEM</a>, <a href="https://publications.waset.org/abstracts/search?q=SF%E2%82%86%20plasma" title=" SF₆ plasma"> SF₆ plasma</a>, <a href="https://publications.waset.org/abstracts/search?q=water-repellency" title=" water-repellency"> water-repellency</a> </p> <a href="https://publications.waset.org/abstracts/162085/water-repellent-finishing-on-cotton-fabric-by-sf6-plasma" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/162085.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">79</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">2253</span> Preparation and Characterization of Silk/Diopside Composite Nanofibers via Electrospinning for Tissue Engineering Application</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abbas%20Teimouri">Abbas Teimouri</a>, <a href="https://publications.waset.org/abstracts/search?q=Leila%20Ghorbanian"> Leila Ghorbanian</a>, <a href="https://publications.waset.org/abstracts/search?q=Iren%20Dabirian"> Iren Dabirian</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This work focused on preparation and characterizations of silk fibroin (SF)/nanodiopside nanoceramic via electrospinning process. Nanofibrous scaffolds were characterized by combined techniques of scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD). The results confirmed that fabricated SF/diopside scaffolds improved cell attachment and proliferation. The results indicated that the electrospun of SF/nanodiopside nanofibrous scaffolds could be considered as ideal candidates for tissue engineering. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electrospinning" title="electrospinning">electrospinning</a>, <a href="https://publications.waset.org/abstracts/search?q=nanofibers" title=" nanofibers"> nanofibers</a>, <a href="https://publications.waset.org/abstracts/search?q=silk%20fibroin" title=" silk fibroin"> silk fibroin</a>, <a href="https://publications.waset.org/abstracts/search?q=diopside" title=" diopside"> diopside</a>, <a href="https://publications.waset.org/abstracts/search?q=composite%20scaffold" title=" composite scaffold"> composite scaffold</a> </p> <a href="https://publications.waset.org/abstracts/45720/preparation-and-characterization-of-silkdiopside-composite-nanofibers-via-electrospinning-for-tissue-engineering-application" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/45720.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">277</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">2252</span> Growth and Characterization of Bis-Thiourea Nickel Barium Chloride Single Crystals</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rakesh%20Hajiyani">Rakesh Hajiyani</a>, <a href="https://publications.waset.org/abstracts/search?q=Chetan%20Chauhan"> Chetan Chauhan</a>, <a href="https://publications.waset.org/abstracts/search?q=Harshkant%20Jethva"> Harshkant Jethva</a>, <a href="https://publications.waset.org/abstracts/search?q=Mihir%20Joshi"> Mihir Joshi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Metal bis-thiourea type organo-metallic crystals are popular as non-linear optical materials. Bis-thiourea nickel barium chloride was synthesized and crystals were grown by slow aqueous solvent evaporation technique. The transparent and colorless crystals having maximum dimensions of 13 mm x 8 mm x 2.2 mm were obtained. The EDAX was carried out to estimate the content of nickel and barium in the grown crystals. The powder XRD analysis suggested orthorhombic crystal structure with unit cell parameters as: a= 9.70 Å, b= 10.68 Å and c= 17.95 Å. The FTIR spectroscopy study confirmed the presence of various functional groups. The UV-vis spectroscopy study indicated that the crystals were transparent in the visible region with 90% transmittance level further optical parameters were studied. From the TGA it was found that the crystals remained stable up to 170 0C and then decomposed through two decomposition stages. The dielectric study was carried out in the frequency range of applied field from 500 Hz to 1 MHz. The variations of dielectric constant, dielectric loss were studied with frequency. It was found that the dielectric constant and the dielectric loss decreased as the frequency of applied field increased. The results are discussed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=crystal%20growth" title="crystal growth">crystal growth</a>, <a href="https://publications.waset.org/abstracts/search?q=dielectric%20study" title=" dielectric study"> dielectric study</a>, <a href="https://publications.waset.org/abstracts/search?q=optical%20parameters" title=" optical parameters"> optical parameters</a>, <a href="https://publications.waset.org/abstracts/search?q=organo-metallic%20crystals" title=" organo-metallic crystals"> organo-metallic crystals</a>, <a href="https://publications.waset.org/abstracts/search?q=powder%20xrd" title=" powder xrd"> powder xrd</a>, <a href="https://publications.waset.org/abstracts/search?q=slow%20evaporation%20technique" title=" slow evaporation technique"> slow evaporation technique</a>, <a href="https://publications.waset.org/abstracts/search?q=TGA" title=" TGA"> TGA</a> </p> <a href="https://publications.waset.org/abstracts/36334/growth-and-characterization-of-bis-thiourea-nickel-barium-chloride-single-crystals" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/36334.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">449</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">2251</span> Characterization of Biosurfactant during Crude Oil Biodegradation Employing Pseudomonas sp. PG1: A Strain Isolated from Garage Soil</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kaustuvmani%20Patowary">Kaustuvmani Patowary</a>, <a href="https://publications.waset.org/abstracts/search?q=Suresh%20Deka"> Suresh Deka</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Oil pollution accidents, nowadays, have become a common phenomenon and have caused ecological and social disasters. Microorganisms with high oil-degrading performance are essential for bioremediation of petroleum hydrocarbon. In this investigation, an effective biosurfactant producer and hydrocarbon degrading bacterial strain, Pseudomonas sp.PG1 (identified by 16s rDNA sequencing) was isolated from hydrocarbon contaminated garage soil of Pathsala, Assam, India, using crude oil enrichment technique. The growth parameters such as pH and temperature were optimized for the strain and upto 81.8% degradation of total petroleum hydrocarbon (TPH) has been achieved after 5 weeks when grown in mineral salt media (MSM) containing 2% (w/v) crude oil as the carbon source. The biosurfactant production during the course of hydrocarbon degradation was monitored by surface tension measurement and emulsification activity. The produced biosurfactant had the ability to decrease the surface tension of MSM from 72 mN/m to 29.6 mN/m, with the critical micelle concentration (CMC)of 56 mg/L. The biosurfactant exhibited 100% emulsification activity on crude oil. FTIR spectroscopy and LCMS-MS analysis of the purified biosurfactant revealed that the biosurfactant is Rhamnolipidic in nature with several rhamnolipid congeners. Gas Chromatography-Mass spectroscopy (GC-MS) analysis clearly demonstrated that the strain PG1 efficiently degrade different hydrocarbon fractions of the crude oil. The study suggeststhat application of the biosurfactant producing strain PG1 as an appropriate candidate for bioremediation of crude oil contaminants. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=petroleum%20hydrocarbon" title="petroleum hydrocarbon">petroleum hydrocarbon</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrocarbon%20contamination" title=" hydrocarbon contamination"> hydrocarbon contamination</a>, <a href="https://publications.waset.org/abstracts/search?q=bioremediation" title=" bioremediation"> bioremediation</a>, <a href="https://publications.waset.org/abstracts/search?q=biosurfactant" title=" biosurfactant"> biosurfactant</a>, <a href="https://publications.waset.org/abstracts/search?q=rhamnolipid" title=" rhamnolipid"> rhamnolipid</a> </p> <a href="https://publications.waset.org/abstracts/27073/characterization-of-biosurfactant-during-crude-oil-biodegradation-employing-pseudomonas-sp-pg1-a-strain-isolated-from-garage-soil" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27073.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">354</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">2250</span> Thermal Reduction of Perfect Well Identified Hexagonal Graphene Oxide Nano-Sheets for Super-Capacitor Applications</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20N.%20Fouda">A. N. Fouda</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A novel well identified hexagonal graphene oxide (GO) nano-sheets were synthesized using modified Hummer method. Low temperature thermal reduction at 350°C in air ambient was performed. After thermal reduction, typical few layers of thermal reduced GO (TRGO) with dimension of few hundreds nanometers were observed using high resolution transmission electron microscopy (HRTEM). GO has a lot of structure models due to variation of the preparation process. Determining the atomic structure of GO is essential for a better understanding of its fundamental properties and for realization of the future technological applications. Structural characterization was identified by x-ray diffraction (XRD), Fourier transform infra-red spectroscopy (FTIR) measurements. A comparison between exper- imental and theoretical IR spectrum were done to confirm the match between experimentally and theoretically proposed GO structure. Partial overlap of the experimental IR spectrum with the theoretical IR was confirmed. The electrochemical properties of TRGO nano-sheets as electrode materials for supercapacitors were investigated by cyclic voltammetry and electrochemical impedance spectroscopy (EIS) measurements. An enhancement in supercapacitance after reduction was confirmed and the area of the CV curve for the TRGO electrode is larger than those for the GO electrode indicating higher specific capacitance which is promising in super-capacitor applications <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hexagonal%20graphene%20oxide" title="hexagonal graphene oxide">hexagonal graphene oxide</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20reduction" title=" thermal reduction"> thermal reduction</a>, <a href="https://publications.waset.org/abstracts/search?q=cyclic%20voltammetry" title=" cyclic voltammetry"> cyclic voltammetry</a> </p> <a href="https://publications.waset.org/abstracts/23306/thermal-reduction-of-perfect-well-identified-hexagonal-graphene-oxide-nano-sheets-for-super-capacitor-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/23306.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">493</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">2249</span> Covalent Functionalization of Graphene Oxide with Aliphatic Polyisocyanate</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=E.%20Changizi">E. Changizi</a>, <a href="https://publications.waset.org/abstracts/search?q=E.%20Ghasemi"> E. Ghasemi</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Ramezanzadeh"> B. Ramezanzadeh</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Mahdavian"> M. Mahdavian</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, the graphene oxide was functionalized with polyisocyanate (piGO). The functionalization was carried out at 45⁰C for 24 hrs under nitrogen atmosphere. The X-ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR) and thermal gravimetric analysis (TGA) were utilized in order to evaluate the GO functionalization. The GO and piGO stability were then investigated in polar and nonpolar solvents. Results obtained showed that polyisocyanate was successfully grafted on the surface of graphen oxide sheets through covalent bonds formation. The surface nature of the graphen oxide was changed into the hydrophobic after functionalization. Moreover, the graphen oxide sheets interlayer distance increased after modification. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=graphen%20oxide" title="graphen oxide">graphen oxide</a>, <a href="https://publications.waset.org/abstracts/search?q=functionalization" title=" functionalization"> functionalization</a>, <a href="https://publications.waset.org/abstracts/search?q=polyisocyanate" title=" polyisocyanate"> polyisocyanate</a>, <a href="https://publications.waset.org/abstracts/search?q=XRD" title=" XRD"> XRD</a>, <a href="https://publications.waset.org/abstracts/search?q=TGA" title=" TGA"> TGA</a>, <a href="https://publications.waset.org/abstracts/search?q=FTIR" title=" FTIR "> FTIR </a> </p> <a href="https://publications.waset.org/abstracts/11430/covalent-functionalization-of-graphene-oxide-with-aliphatic-polyisocyanate" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11430.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">443</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">2248</span> Development of a Semiconductor Material Based on Functionalized Graphene: Application to the Detection of Nitrogen Oxides (NOₓ)</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Djamil%20Guettiche">Djamil Guettiche</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Mekki"> Ahmed Mekki</a>, <a href="https://publications.waset.org/abstracts/search?q=Tighilt%20Fatma-Zohra"> Tighilt Fatma-Zohra</a>, <a href="https://publications.waset.org/abstracts/search?q=Rachid%20Mahmoud"> Rachid Mahmoud</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of this study was to synthesize and characterize conducting polymer composites of polypyrrole and graphene, including pristine and surface-treated graphene (PPy/GO, PPy/rGO, and PPy/rGO-ArCOOH), for use as sensitive elements in a homemade chemiresistive module for on-line detection of nitrogen oxides vapors. The chemiresistive module was prepared, characterized, and evaluated for performance. Structural and morphological characterizations of the composite were carried out using FTIR, Raman spectroscopy, and XRD analyses. After exposure to NO and NO₂ gases in both static and dynamic modes, the sensitivity, selectivity, limit of detection, and response time of the sensor were determined at ambient temperature. The resulting sensor showed high sensitivity, selectivity, and reversibility, with a low limit of detection of 1 ppm. A composite of polypyrrole and graphene functionalized with aryl 4-carboxy benzene diazonium salt was synthesized and characterized using FTIR, scanning electron microscopy, transmission electron microscopy, UV-visible, and X-ray diffraction. The PPy-rGOArCOOH composite exhibited a good electrical resistance response to NO₂ at room temperature and showed enhanced NO₂-sensing properties compared to PPy-rGO thin films. The selectivity and stability of the NO₂ sensor based on the PPy/rGO-ArCOOH nanocomposite were also investigated. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=conducting%20polymers" title="conducting polymers">conducting polymers</a>, <a href="https://publications.waset.org/abstracts/search?q=surface%20treated%20graphene" title=" surface treated graphene"> surface treated graphene</a>, <a href="https://publications.waset.org/abstracts/search?q=diazonium%20salt" title=" diazonium salt"> diazonium salt</a>, <a href="https://publications.waset.org/abstracts/search?q=polypyrrole" title=" polypyrrole"> polypyrrole</a>, <a href="https://publications.waset.org/abstracts/search?q=Nitrogen%20oxide%20sensing" title=" Nitrogen oxide sensing"> Nitrogen oxide sensing</a> </p> <a href="https://publications.waset.org/abstracts/164940/development-of-a-semiconductor-material-based-on-functionalized-graphene-application-to-the-detection-of-nitrogen-oxides-no" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/164940.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">78</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">2247</span> Preparation and Characterization of Nickel-Tungsten Nanoparticles Using Microemulsion Mediated Synthesis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Pal">S. Pal</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20Singh"> R. Singh</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Sivakumar"> S. Sivakumar</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20Kunzru"> D. Kunzru</a> </p> <p class="card-text"><strong>Abstract:</strong></p> AOT stabilized reverse micelles of deionized water, dispersed in isooctane have been used to synthesize bimetallic nickel tungsten nanoparticles. Prepared nanoparticles were supported on γ-Al2O3 followed by calcination at 500oC. Characterizations of the nanoparticles were done by TEM, XRD, FTIR, XRF, TGA and BET. XRF results showed that this method gave good composition control with W/Ni weight ratio equal to 3.2. TEM images showed particle size of 5-10 nm. Removal of surfactant after calcination was confirmed by TGA and FTIR. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanoparticles" title="nanoparticles">nanoparticles</a>, <a href="https://publications.waset.org/abstracts/search?q=reverse%20micelles" title=" reverse micelles"> reverse micelles</a>, <a href="https://publications.waset.org/abstracts/search?q=nickel" title=" nickel"> nickel</a>, <a href="https://publications.waset.org/abstracts/search?q=tungsten" title=" tungsten "> tungsten </a> </p> <a href="https://publications.waset.org/abstracts/19384/preparation-and-characterization-of-nickel-tungsten-nanoparticles-using-microemulsion-mediated-synthesis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/19384.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">591</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">2246</span> Scientific Investigation for an Ancient Egyptian Polychrome Wooden Stele </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Abdrabou">Ahmed Abdrabou</a>, <a href="https://publications.waset.org/abstracts/search?q=Medhat%20Abdalla"> Medhat Abdalla</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The studied stele dates back to Third Intermediate Period (1075-664) B.C in an ancient Egypt. It is made of wood and covered with painted gesso layers. This study aims to use a combination of multi spectral imaging {visible, infrared (IR), Visible-induced infrared luminescence (VIL), Visible-induced ultraviolet luminescence (UVL) and ultraviolet reflected (UVR)}, along with portable x-ray fluorescence in order to map and identify the pigments as well as to provide a deeper understanding of the painting techniques. Moreover; the authors were significantly interested in the identification of wood species. Multispectral imaging acquired in 3 spectral bands, ultraviolet (360-400 nm), visible (400-780 nm) and infrared (780-1100 nm) using (UV Ultraviolet-induced luminescence (UVL), UV Reflected (UVR), Visible (VIS), Visible-induced infrared luminescence (VIL) and Infrared photography. False color images are made by digitally editing the VIS with IR or UV images using Adobe Photoshop. Optical Microscopy (OM), potable X-ray fluorescence spectroscopy (p-XRF) and Fourier Transform Infrared Spectroscopy (FTIR) were used in this study. Mapping and imaging techniques provided useful information about the spatial distribution of pigments, in particular visible-induced luminescence (VIL) which allowed the spatial distribution of Egyptian blue pigment to be mapped and every region containing Egyptian blue, even down to single crystals in some instances, is clearly visible as a bright white area; however complete characterization of the pigments requires the use of p. XRF spectroscopy. Based on the elemental analysis found by P.XRF, we conclude that the artists used mixtures of the basic mineral pigments to achieve a wider palette of hues. Identification of wood species Microscopic identification indicated that the wood used was Sycamore Fig (Ficus sycomorus L.) which is recorded as being native to Egypt and was used to make wooden artifacts since at least the Fifth Dynasty. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=polychrome%20wooden%20stele" title="polychrome wooden stele">polychrome wooden stele</a>, <a href="https://publications.waset.org/abstracts/search?q=multispectral%20imaging" title=" multispectral imaging"> multispectral imaging</a>, <a href="https://publications.waset.org/abstracts/search?q=IR%20luminescence" title=" IR luminescence"> IR luminescence</a>, <a href="https://publications.waset.org/abstracts/search?q=Wood%20identification" title=" Wood identification"> Wood identification</a>, <a href="https://publications.waset.org/abstracts/search?q=Sycamore%20Fig" title=" Sycamore Fig"> Sycamore Fig</a>, <a href="https://publications.waset.org/abstracts/search?q=p-XRF" title=" p-XRF "> p-XRF </a> </p> <a href="https://publications.waset.org/abstracts/58954/scientific-investigation-for-an-ancient-egyptian-polychrome-wooden-stele" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/58954.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">264</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">2245</span> Performance of the SrSnO₃/SnO₂ Nanocomposite Catalyst on the Photocatalytic Degradation of Dyes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=H.%20Boucheloukh">H. Boucheloukh</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20Aoun"> N. Aoun</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Denni"> M. Denni</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Mahrouk"> A. Mahrouk</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20Sehili"> T. Sehili</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Perovskite materials with strontium alkaline earth metal have attracted researchers in photocatalysis. Thus, nanocomposite-based strontium has been synthesized by the sol-gel method, calciened at 700 °C, and characterized by different methods such as X-ray difraction (DRX), Fourier transformed infrared (FTIR), and diffuse relectance spectroscopy (DRS). After that, the photocatlytic performance of SrNO3/SnO2 has been tested under sunlight in an aqueous solution for two dyes methylene blue and congo-red. The results reveal that 70% of methylene blue has already been degraded after 45 minutes of exposure to sun light, while 80% of Congo red has been eliminated by adsorption on SrSnO₃/SnO₂ in 120 minutes of contact. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=congo-red" title="congo-red">congo-red</a>, <a href="https://publications.waset.org/abstracts/search?q=methylene%20blue" title=" methylene blue"> methylene blue</a>, <a href="https://publications.waset.org/abstracts/search?q=photocatalysis" title=" photocatalysis"> photocatalysis</a>, <a href="https://publications.waset.org/abstracts/search?q=perovskite" title=" perovskite"> perovskite</a> </p> <a href="https://publications.waset.org/abstracts/184875/performance-of-the-srsno3sno2-nanocomposite-catalyst-on-the-photocatalytic-degradation-of-dyes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/184875.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">54</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">2244</span> Tracking of Linarin from the Ethyl Acetate Fraction of Melinjo (Gnetum gnemon L.) Seeds Using Preparative High Performance Liquid Chromatography</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Asep%20Sukohar">Asep Sukohar</a>, <a href="https://publications.waset.org/abstracts/search?q=Ramadhan%20Triyandi"> Ramadhan Triyandi</a>, <a href="https://publications.waset.org/abstracts/search?q=Muhammad%20Iqbal"> Muhammad Iqbal</a>, <a href="https://publications.waset.org/abstracts/search?q=Sahidin"> Sahidin</a>, <a href="https://publications.waset.org/abstracts/search?q=Suharyani"> Suharyani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Introduction: Resveratrol is a class of bioactive chemicals found in melinjo, which has a wide range of biological actions. The purpose of this study is to determine the linarin content of the melinjo fraksi by using preparative-high-performance liquid chromatography (prep-HPLC). Method: Extraction used the soxhletation method with 96% ethanol solvent. Fractionation used ethyl acetate and ethanol in a ratio of 1:1. Tracing of linarin compound used prep-HPLC with a mobile phase ratio of distilled water: methanol (55: 45, v/v). The presence of linarin was detected using a wavelength of 215 nm. Fourier Transform Infrared (FTIR) was used to identify the functional groups of compound. Result: The retention time required to elute the ethyl acetate fraction was 2.601 minutes. Compound separation identification using Fourier Transform Infrared Spectroscopy - Quest Attenuated Total Reflectance (FTIR - QATR) has a similarity value range with standards from 0 to 1000. The elution results of the ethyl acetate fraction have similar values with the standard compounds linarin (668), resveratrol (578), and catechin (455). Conclusion: Tracing for active compound in the ethyl acetate fraction of Gnetum Gnemon L. using prep-HPLC showed a strong suspicion of the presence of linarin compound. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gnetum%20gnemon%20L." title="Gnetum gnemon L.">Gnetum gnemon L.</a>, <a href="https://publications.waset.org/abstracts/search?q=linarin" title=" linarin"> linarin</a>, <a href="https://publications.waset.org/abstracts/search?q=prep-HPLC" title=" prep-HPLC"> prep-HPLC</a>, <a href="https://publications.waset.org/abstracts/search?q=fraction%20ethyl%20acetate" title=" fraction ethyl acetate"> fraction ethyl acetate</a> </p> <a href="https://publications.waset.org/abstracts/171258/tracking-of-linarin-from-the-ethyl-acetate-fraction-of-melinjo-gnetum-gnemon-l-seeds-using-preparative-high-performance-liquid-chromatography" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/171258.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">116</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">2243</span> Synthesis of Plant-Mediated Silver Nanoparticles Using Erythrina indica Extract and Evaluation of Their Anti-Microbial Activities</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chandra%20Sekhar%20Singh">Chandra Sekhar Singh</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20Chakrapani"> P. Chakrapani</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Arun%20Jyothi"> B. Arun Jyothi</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Roja%20Rani"> A. Roja Rani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The green synthesis of metallic nanoparticles (NPs) involves biocompatible ingredients under physiological conditions of temperature and pressure. Moreover, the biologically active molecules involved in the green synthesis of NPs act as functionalizing ligands, making these NPs more suitable for biomedical applications. Among the most important bioreductants are plant extracts, which are relatively easy to handle, readily available, low cost, and have been well explored for the green synthesis of other nanomaterials. Various types of metallic NPs have already been synthesized using plant extracts. They have wide applicability in various areas such as electronics, catalysis, chemistry, energy, and medicine. Metallic nanoparticles are traditionally synthesized by wet chemical techniques, where the chemicals used are quite often toxic and flammable. In our study, we were described a cost effective and environment friendly technique for green synthesis of silver nanoparticles from 1mM AgNO3 solution through the aqueous extract of Erythrina indica as reducing as well as capping agent. Nanoparticles were characterized using UV–Vis absorption spectroscopy, FTIR, XRD, X-ray diffraction, SEM and TEM analysis showed the average particle size of 30 nm as well as revealed their spherical structure. Further these biologically synthesized nanoparticles were found to be highly toxic against different human pathogens viz. two Gram positive namely Klebsiella pneumonia and Bacillus subtilis bacteria and two were Gram negative bacteria namely Staphylococcus aureus and Escherichia coli (E. coli). This is for the first time reporting that Erythrina indica plant extract was used for the synthesis of nanoparticles. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=silver%20nanoparticles" title="silver nanoparticles">silver nanoparticles</a>, <a href="https://publications.waset.org/abstracts/search?q=green%20synthesis" title=" green synthesis"> green synthesis</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=FTIR" title=" FTIR"> FTIR</a>, <a href="https://publications.waset.org/abstracts/search?q=TEM" title=" TEM"> TEM</a>, <a href="https://publications.waset.org/abstracts/search?q=SEM" title=" SEM"> SEM</a> </p> <a href="https://publications.waset.org/abstracts/11912/synthesis-of-plant-mediated-silver-nanoparticles-using-erythrina-indica-extract-and-evaluation-of-their-anti-microbial-activities" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11912.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">504</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">2242</span> Utilization of Nanoclay to Reinforce Flax Fabric-Geopolymer Composites</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=H.%20S.%20Assaedi">H. S. Assaedi</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20U.%20A.%20Shaikh"> F. U. A. Shaikh</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20M.%20Low"> I. M. Low</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Geopolymer composites reinforced with flax fabrics and nano-clay are fabricated and studied for physical and mechanical properties using X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscope (SEM). Nanoclay platelets at a weight of 1.0%, 2.0%, and 3.0% were added to geopolymer pastes. Nanoclay at 2.0 wt.% was found to improve density and decrease porosity while improving flexural strength and post-peak toughness. A microstructural analysis indicated that nanoclay behaves as filler and as an activator supporting geopolymeric reaction while producing a higher content geopolymer gel improving the microstructure of binders. The process enhances adhesion between the geopolymer matrix and flax fibres. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=flax%20fibres" title="flax fibres">flax fibres</a>, <a href="https://publications.waset.org/abstracts/search?q=geopolymer" title=" geopolymer"> geopolymer</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20properties" title=" mechanical properties"> mechanical properties</a>, <a href="https://publications.waset.org/abstracts/search?q=nanoclay" title=" nanoclay"> nanoclay</a> </p> <a href="https://publications.waset.org/abstracts/40080/utilization-of-nanoclay-to-reinforce-flax-fabric-geopolymer-composites" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/40080.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">245</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">2241</span> Synthesis and Characterization of Some Nano-Structured Metal Hexacyanoferrates Using Sapindus mukorossi, a Natural Surfactant</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Uma%20Shanker">Uma Shanker</a>, <a href="https://publications.waset.org/abstracts/search?q=Vidhisha%20Jassal"> Vidhisha Jassal</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A novel green route was used to synthesize few metal hexacyanoferrates (FeHCF, NiHCF, CoHCF and CuHCF) nanoparticles using Sapindus mukorossias a natural surfactant and water as a solvent. The synthesized nanoparticles were characterized by Powder X-ray diffraction (PXRD), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), Fourier Transform Infrared Spectroscopy (FTIR) and Thermo gravimetric techniques. Trasmission electron microscopic images showed that synthesized MHCF nanoparticles exhibited cubic and spherical shapes with exceptionally small sizes ranging from 3nm - 186 nm. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=metal%20hexacyanoferrates" title="metal hexacyanoferrates">metal hexacyanoferrates</a>, <a href="https://publications.waset.org/abstracts/search?q=natural%20surfactant" title=" natural surfactant"> natural surfactant</a>, <a href="https://publications.waset.org/abstracts/search?q=Sapindus%20mukorossias" title=" Sapindus mukorossias"> Sapindus mukorossias</a>, <a href="https://publications.waset.org/abstracts/search?q=nanoparticles" title=" nanoparticles "> nanoparticles </a> </p> <a href="https://publications.waset.org/abstracts/17815/synthesis-and-characterization-of-some-nano-structured-metal-hexacyanoferrates-using-sapindus-mukorossi-a-natural-surfactant" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17815.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">526</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">2240</span> Preparation, Characterization, and in-Vitro Drug Release Study of Methotrexate-Loaded Hydroxyapatite-Sodium Alginate Nanocomposites</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Friday%20G.%20Okibe">Friday G. Okibe</a>, <a href="https://publications.waset.org/abstracts/search?q=Edit%20B.%20Agbaji"> Edit B. Agbaji</a>, <a href="https://publications.waset.org/abstracts/search?q=Victor%20O.%20Ajibola"> Victor O. Ajibola</a>, <a href="https://publications.waset.org/abstracts/search?q=Christain%20C.%20Onoyima"> Christain C. Onoyima</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Controlled drug delivery systems reduce dose-dependent toxicity associated with potent drugs, including anticancer drugs. In this research, hydroxyapatite (HA) and hydroxyapatite-sodium alginate nanocomposites (HASA) were successfully prepared and characterized using Fourier Transform Infrared spectroscopy (FTIR) and Scanning Electron Microscopy (SEM). The FTIR result showed absorption peaks characteristics of pure hydroxyapatite (HA), and also confirmed the chemical interaction between hydroxyapatite and sodium alginate in the formation of the composite. Image analysis from SEM revealed nano-sized hydroxyapatite and hydroxyapatite-sodium alginate nanocomposites with irregular morphologies. Particle size increased with the formation of the nanocomposites relative to pure hydroxyapatite, with no significant change in particles morphologies. Drug loading and in-vitro drug release study were carried out using synthetic body fluid as the release medium, at pH 7.4 and 37 °C and under perfect sink conditions. The result shows that drug loading is highest for pure hydroxyapatite and decreased with increasing quantity of sodium alginate. However, the release study revealed that HASA-5%wt and HASA-20%wt presented better release profile than pure hydroxyapatite, while HASA-33%wt and HASA-50%wt have poor release profiles. This shows that Methotrexate-loaded hydroxyapatite-sodium alginate if prepared under optimal conditions is a potential carrier for effective delivery of Methotrexate. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=drug-delivery" title="drug-delivery">drug-delivery</a>, <a href="https://publications.waset.org/abstracts/search?q=hydroxyapatite" title=" hydroxyapatite"> hydroxyapatite</a>, <a href="https://publications.waset.org/abstracts/search?q=methotrexate" title=" methotrexate"> methotrexate</a>, <a href="https://publications.waset.org/abstracts/search?q=nanocomposites" title=" nanocomposites"> nanocomposites</a>, <a href="https://publications.waset.org/abstracts/search?q=sodium%20alginate" title=" sodium alginate"> sodium alginate</a> </p> <a href="https://publications.waset.org/abstracts/53235/preparation-characterization-and-in-vitro-drug-release-study-of-methotrexate-loaded-hydroxyapatite-sodium-alginate-nanocomposites" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/53235.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">277</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">2239</span> Synthesis and Pharmacological Activity of Some Oxyindole Derivatives</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vivek%20Singh%20Bhadauria">Vivek Singh Bhadauria</a>, <a href="https://publications.waset.org/abstracts/search?q=Abhishek%20Pandey"> Abhishek Pandey</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Indole-2,3-diones are known for their various biological activities. By suitable control of a substituent, different novel indole-2,3-diones were synthesized. In this present study, various Schiff and Mannich bases were synthesized and characterized, and evaluated their for different pharmacological activities. The compounds were prepared by reacting indole-2,3-dione with benzyl chloride and 4-substituted thiosemicarbazides. All the synthesized compounds were characterized by the TLC, MP, Elemental analysis, FTIR, 1H-NMR and Mass spectroscopy. The compounds have been evaluated for their anticancer, antituberculosis, anticonvulsant, antiinflammatory as well as anti-SARS activity and the results are presented. Some of compounds possessed different pharmacological activity at a concentration of 200 mg/kg body weight and even at lower concentration. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=indoles" title="indoles">indoles</a>, <a href="https://publications.waset.org/abstracts/search?q=isatin" title=" isatin"> isatin</a>, <a href="https://publications.waset.org/abstracts/search?q=NMR" title=" NMR"> NMR</a>, <a href="https://publications.waset.org/abstracts/search?q=biological%20activities" title=" biological activities"> biological activities</a> </p> <a href="https://publications.waset.org/abstracts/2954/synthesis-and-pharmacological-activity-of-some-oxyindole-derivatives" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2954.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">355</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">2238</span> Synthesis of Amine Functionalized MOF-74 for Carbon Dioxide Capture</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ghulam%20Murshid">Ghulam Murshid</a>, <a href="https://publications.waset.org/abstracts/search?q=Samil%20Ullah"> Samil Ullah</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Scientific studies suggested that the incremented greenhouse gas concentration in the atmosphere, particularly of carbon dioxide (CO2) is one of the major factors in global warming. The concentration of CO2 in our climate has crossed the milestone level of 400 parts per million (ppm) hence breaking the record of human history. A report by 49 researchers from 10 countries said, 'Global CO2 emissions from burning fossil fuels will rise to a record 36 billion metric tons (39.683 billion tons) this year.' Main contributors of CO2 in to the atmosphere are usage of fossil fuel, transportation sector and power generation plants. Among all available technologies, which include; absorption via chemicals, membrane separation, cryogenic and adsorption are in practice around the globe. Adsorption of CO2 using metal organic frameworks (MOF) is getting interest of researcher around the globe. In the current work, MOF-74 as well as modified MOF-74 with a sterically hindered amine (AMP) was synthesized and characterized. The modification was carried out using a sterically hindered amine in order to study the effect on its adsorption capacity. Resulting samples were characterized by using Fourier Transform Infrared Spectroscopy (FTIR), Field Emission Scanning Electron Microscope (FESEM), Thermal Gravimetric Analyser (TGA) and Brunauer-Emmett-Teller (BET). The FTIR results clearly confirmed the formation of MOF-74 structure and the presence of AMP. FESEM and TEM revealed the topography and morphology of the both MOF-74 and amine modified MOF. BET isotherm result shows that due to the addition of AMP in to the structure, significant enhancement of CO2 adsorption was observed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=adsorbents" title="adsorbents">adsorbents</a>, <a href="https://publications.waset.org/abstracts/search?q=amine" title=" amine"> amine</a>, <a href="https://publications.waset.org/abstracts/search?q=CO2" title=" CO2"> CO2</a>, <a href="https://publications.waset.org/abstracts/search?q=global%20warming" title=" global warming "> global warming </a> </p> <a href="https://publications.waset.org/abstracts/34976/synthesis-of-amine-functionalized-mof-74-for-carbon-dioxide-capture" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/34976.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">422</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">2237</span> Comparative Studies of Modified Clay/Polyaniline Nanocomposites</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fatima%20Zohra%20Zeggai">Fatima Zohra Zeggai</a>, <a href="https://publications.waset.org/abstracts/search?q=Benjamin%20Carbonnier"> Benjamin Carbonnier</a>, <a href="https://publications.waset.org/abstracts/search?q=A%C3%AFcha%20Hachemaoui"> Aïcha Hachemaoui</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Yahiaoui"> Ahmed Yahiaoui</a>, <a href="https://publications.waset.org/abstracts/search?q=Samia%20Mahouche-Chergui"> Samia Mahouche-Chergui</a>, <a href="https://publications.waset.org/abstracts/search?q=Zakaria%20Salmi"> Zakaria Salmi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A series of polyaniline (PANI)/modified Montmorillonite (MMT) Clay nanocomposite materials have been successfully prepared by In-Situ polymerization in the presence of modified MMT-Clay or Diazonium-MMT-Clay. The obtained nanocomposites were characterized and compared by various physicochemical techniques. The presence of physicochemical interaction, probably hydrogen bonding, between clay and polyaniline, which was confirmed by FTIR, UV-Vis Spectroscopy. The electrical conductivity of neat PANI and a series of the obtained nanocomposites were also studied by cyclic voltammograms. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=polyaniline" title="polyaniline">polyaniline</a>, <a href="https://publications.waset.org/abstracts/search?q=clay" title=" clay"> clay</a>, <a href="https://publications.waset.org/abstracts/search?q=nanocomposites" title=" nanocomposites"> nanocomposites</a>, <a href="https://publications.waset.org/abstracts/search?q=in-situ%20polymerization" title=" in-situ polymerization"> in-situ polymerization</a>, <a href="https://publications.waset.org/abstracts/search?q=polymers%20conductors" title=" polymers conductors"> polymers conductors</a>, <a href="https://publications.waset.org/abstracts/search?q=diazonium%20salt" title=" diazonium salt"> diazonium salt</a> </p> <a href="https://publications.waset.org/abstracts/17853/comparative-studies-of-modified-claypolyaniline-nanocomposites" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17853.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">471</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">2236</span> Experimental Quantification and Modeling of Dissolved Gas during Hydrate Crystallization: CO₂ Hydrate Case</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amokrane%20Boufares">Amokrane Boufares</a>, <a href="https://publications.waset.org/abstracts/search?q=Elise%20Provost"> Elise Provost</a>, <a href="https://publications.waset.org/abstracts/search?q=Veronique%20Osswald"> Veronique Osswald</a>, <a href="https://publications.waset.org/abstracts/search?q=Pascal%20Clain"> Pascal Clain</a>, <a href="https://publications.waset.org/abstracts/search?q=Anthony%20Delahaye"> Anthony Delahaye</a>, <a href="https://publications.waset.org/abstracts/search?q=Laurence%20Fournaison"> Laurence Fournaison</a>, <a href="https://publications.waset.org/abstracts/search?q=Didier%20Dalmazzone"> Didier Dalmazzone </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Gas hydrates have long been considered as problematic for flow assurance in natural gas and oil transportation. On the other hand, they are now seen as future promising materials for various applications (i.e. desalination of seawater, natural gas and hydrogen storage, gas sequestration, gas combustion separation and cold storage and transport). Nonetheless, a better understanding of the crystallization mechanism of gas hydrate and of their formation kinetics is still needed for a better comprehension and control of the process. To that purpose, measuring the real-time evolution of the dissolved gas concentration in the aqueous phase during hydrate formation is required. In this work, CO₂ hydrates were formed in a stirred reactor equipped with an Attenuated Total Reflection (ATR) probe coupled to a Fourier Transform InfraRed (FTIR) spectroscopy analyzer. A method was first developed to continuously measure in-situ the CO₂ concentration in the liquid phase during solubilization, supersaturation, hydrate crystallization and dissociation steps. Thereafter, the measured concentration data were compared with those of equilibrium concentrations. It was observed that the equilibrium is instantly reached in the liquid phase due to the fast consumption of dissolved gas by the hydrate crystallization. Consequently, it was shown that hydrate crystallization kinetics is limited by the gas transfer at the gas-liquid interface. Finally, we noticed that the liquid-hydrate equilibrium during the hydrate crystallization is governed by the temperature of the experiment under the tested conditions. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=gas%20hydrate" title="gas hydrate">gas hydrate</a>, <a href="https://publications.waset.org/abstracts/search?q=dissolved%20gas" title=" dissolved gas"> dissolved gas</a>, <a href="https://publications.waset.org/abstracts/search?q=crystallization" title=" crystallization"> crystallization</a>, <a href="https://publications.waset.org/abstracts/search?q=infrared%20spectroscopy" title=" infrared spectroscopy "> infrared spectroscopy </a> </p> <a href="https://publications.waset.org/abstracts/93392/experimental-quantification-and-modeling-of-dissolved-gas-during-hydrate-crystallization-co2-hydrate-case" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/93392.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">282</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">2235</span> Material Detection by Phase Shift Cavity Ring-Down Spectroscopy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rana%20Muhammad%20Armaghan%20Ayaz">Rana Muhammad Armaghan Ayaz</a>, <a href="https://publications.waset.org/abstracts/search?q=Yigit%20Uysall%C4%B1"> Yigit Uysallı</a>, <a href="https://publications.waset.org/abstracts/search?q=Nima%20Bavili"> Nima Bavili</a>, <a href="https://publications.waset.org/abstracts/search?q=Berna%20Morova"> Berna Morova</a>, <a href="https://publications.waset.org/abstracts/search?q=Alper%20Kiraz"> Alper Kiraz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Traditional optical methods for example resonance wavelength shift and cavity ring-down spectroscopy used for material detection and sensing have disadvantages, for example, less resistance to laser noise, temperature fluctuations and extraction of the required information can be a difficult task like ring downtime in case of cavity ring-down spectroscopy. Phase shift cavity ring down spectroscopy is not only easy to use but is also capable of overcoming the said problems. This technique compares the phase difference between the signal coming out of the cavity with the reference signal. Detection of any material is made by the phase difference between them. By using this technique, air, water, and isopropyl alcohol can be recognized easily. This Methodology has far-reaching applications and can be used in air pollution detection, human breath analysis and many more. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=materials" title="materials">materials</a>, <a href="https://publications.waset.org/abstracts/search?q=noise" title=" noise"> noise</a>, <a href="https://publications.waset.org/abstracts/search?q=phase%20shift" title=" phase shift"> phase shift</a>, <a href="https://publications.waset.org/abstracts/search?q=resonance%20wavelength" title=" resonance wavelength"> resonance wavelength</a>, <a href="https://publications.waset.org/abstracts/search?q=sensitivity" title=" sensitivity"> sensitivity</a>, <a href="https://publications.waset.org/abstracts/search?q=time%20domain%20approach" title=" time domain approach"> time domain approach</a> </p> <a href="https://publications.waset.org/abstracts/107606/material-detection-by-phase-shift-cavity-ring-down-spectroscopy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/107606.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">149</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">2234</span> Pioneer Synthesis and Characterization of Boron Containing Hard Materials</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=G%C3%BCl%C5%9Fah%20%C3%87elik%20G%C3%BCl">Gülşah Çelik Gül</a>, <a href="https://publications.waset.org/abstracts/search?q=Figen%20Kurtulu%C5%9F"> Figen Kurtuluş</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The first laboratory synthesis of hard materials such as diamond proceeded to attack of developing materials with high hardness to compete diamond. Boron rich solids are good candidates owing to their short interatomic bond lengths and strong covalent character. Boron containing hard material was synthesized by modified-microwave method under nitrogen atmosphere by using a fuel (glycine or urea), amorphous boron and/or boric acid in appropriate molar ratio. Characterizations were done by x-ray diffraction (XRD), fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy/energy dispersive analyze (SEM/EDS), thermo gravimetric/differantial thermal analysis (TG/DTA). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=boron%20containing%20materials" title="boron containing materials">boron containing materials</a>, <a href="https://publications.waset.org/abstracts/search?q=hard%20materials" title=" hard materials"> hard materials</a>, <a href="https://publications.waset.org/abstracts/search?q=microwave%20synthesis" title=" microwave synthesis"> microwave synthesis</a>, <a href="https://publications.waset.org/abstracts/search?q=powder%20X-ray%20diffraction" title=" powder X-ray diffraction "> powder X-ray diffraction </a> </p> <a href="https://publications.waset.org/abstracts/27062/pioneer-synthesis-and-characterization-of-boron-containing-hard-materials" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/27062.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">593</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">2233</span> Fabrication of Porous Materials for the Removal of Lead from Waste Water</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Marcia%20Silva">Marcia Silva</a>, <a href="https://publications.waset.org/abstracts/search?q=Jayme%20Kolarik"> Jayme Kolarik</a>, <a href="https://publications.waset.org/abstracts/search?q=Brennon%20Garthwait"> Brennon Garthwait</a>, <a href="https://publications.waset.org/abstracts/search?q=William%20Lee"> William Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=Hai-Feng%20Zhang"> Hai-Feng Zhang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Adsorption of lead by a natural porous material was studied to establish a baseline for the removal of heavy metals from drinking and waste water. Samples were examined under different conditions such as solution pH, solution concentration, solution temperature, and exposure time. New materials with potentially enhanced adsorption properties were developed by functionalizing the surface of the natural porous material to fabricate graphene based coated and sulfide based treated porous material. The functionalized materials were characterized with Fourier Transform Infrared Spectroscopy (FTIR), Raman, Thermogravimetric Analysis (TGA) and Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) techniques. Solution pH effect on removal efficiency has been investigated in acidic (pH = 4), neutral (pH = 6) and basic (pH = 10) pH levels. All adsorbent materials showed highest adsorption capacities at neutral pH levels. Batch experiment was employed to assess the efficacy for the removal of lead with the sorption kinetics and the adsorption isotherms being determined for the natural and treated porous materials. The addition of graphene-based and sulfide-based materials increased the lead removal capacity of the natural clean porous material. Theoretical calculations confirmed pseudo-second order model as kinetic mechanism for lead adsorption for all adsorbents. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=heavy%20metals" title="heavy metals">heavy metals</a>, <a href="https://publications.waset.org/abstracts/search?q=ion%20exchange" title=" ion exchange"> ion exchange</a>, <a href="https://publications.waset.org/abstracts/search?q=adsorption" title=" adsorption"> adsorption</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20remediation" title=" water remediation"> water remediation</a> </p> <a href="https://publications.waset.org/abstracts/91223/fabrication-of-porous-materials-for-the-removal-of-lead-from-waste-water" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/91223.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">248</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">2232</span> Microwave-Assisted Synthesis of Silver Nanoparticles from Dioscorea Deltoidea Callus Extract and Evaluation of Its Antimicrobial Activity</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mujeeb%20Mohd">Mujeeb Mohd</a>, <a href="https://publications.waset.org/abstracts/search?q=Aqil%20Mohd"> Aqil Mohd</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20K.%20Najmi"> A. K. Najmi</a>, <a href="https://publications.waset.org/abstracts/search?q=Akhtar%20MMohd"> Akhtar MMohd</a>, <a href="https://publications.waset.org/abstracts/search?q=Vasim%20Mohd"> Vasim Mohd</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Dioscorea deltoidea belongs to the Dioscoreaceae family, is usually found in the north-western Himalayas and some other parts of the world up to an altitude of 1000–3000 m. D. deltoidea commonly known as yam and is an extensively used medicinal plant in the indigenous system of medicine. It has been reported to contain dioscine a steroidal glycoside in higher concentration. In the present investigation, silver nanoparticles (AgNPs) have been synthesized by a simple, efficient, environmentally benevolent and economic microwave-assisted method. Callus culture of D. deltoidea was developed and maintained on Murashige and skooge basal medium supplemented with different combination and concentration of plant growth regulators. Aqueous extract of callus culture was used as the reducing and stabilizing agent. The synthesized nanoparticles have been characterized by UV–Vis spectroscopy, Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and X-ray diffraction (XRD analysis. The presence of a characteristic surface plasmon resonance (SPR) absorption band at 430 nm in UV–Vis reveals the reduction of silver metal ions into silver nanoparticles. Whereas FTIR analysis was performed to probe the possible functional group involved in the synthesis of AgNPs. Further extract and AgNPs were evaluated for antimicrobial activity against different pathogenic microorganisms. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antimicrobial" title="antimicrobial">antimicrobial</a>, <a href="https://publications.waset.org/abstracts/search?q=Dioscorea%20deltoidea" title=" Dioscorea deltoidea"> Dioscorea deltoidea</a>, <a href="https://publications.waset.org/abstracts/search?q=microwave" title=" microwave"> microwave</a>, <a href="https://publications.waset.org/abstracts/search?q=silver" title=" silver"> silver</a>, <a href="https://publications.waset.org/abstracts/search?q=nanoparticles" title=" nanoparticles"> nanoparticles</a> </p> <a href="https://publications.waset.org/abstracts/64630/microwave-assisted-synthesis-of-silver-nanoparticles-from-dioscorea-deltoidea-callus-extract-and-evaluation-of-its-antimicrobial-activity" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/64630.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">268</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">2231</span> FTIR Characterization of EPS Ligands from Mercury Resistant Bacterial Isolate, Paenibacillus jamilae PKR1</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Debajit%20Kalita">Debajit Kalita</a>, <a href="https://publications.waset.org/abstracts/search?q=Macmillan%20Nongkhlaw"> Macmillan Nongkhlaw</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20R.%20Joshi"> S. R. Joshi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Mercury (Hg) is a highly toxic heavy metal released both from naturally occurring volcanoes and anthropogenic activities like alkali and mining industries as well as biomedical wastes. Exposure to mercury is known to affect the nervous, gastrointestinal and renal systems. In the present study, a bacterial isolate identified using 16S rRNA marker as Paenibacillus jamilae PKR1 isolated from India’s largest sandstone-type uranium deposits, containing an average of 0.1% U3O8, was found to be resistance to Hg contamination under culture conditions. It showed strong hydrophobicity as revealed by SAT, MATH, PAT, SAA adherence assays. The Fourier Transform Infrared (FTIR) spectra showed the presence of hydroxyl, amino and carboxylic functional groups on the cell surface EPS which are known to contribute in the binding of metals. It is proposed that the characterized isolate tolerating up to 4.0mM of mercury provides scope for its application in bioremediation of mercury from contaminated sites. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mercury" title="mercury">mercury</a>, <a href="https://publications.waset.org/abstracts/search?q=Domiasiat" title=" Domiasiat"> Domiasiat</a>, <a href="https://publications.waset.org/abstracts/search?q=uranium" title=" uranium"> uranium</a>, <a href="https://publications.waset.org/abstracts/search?q=paenibacillus%20jamilae" title=" paenibacillus jamilae"> paenibacillus jamilae</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrophobicity" title=" hydrophobicity"> hydrophobicity</a>, <a href="https://publications.waset.org/abstracts/search?q=FTIR" title=" FTIR"> FTIR</a> </p> <a href="https://publications.waset.org/abstracts/31677/ftir-characterization-of-eps-ligands-from-mercury-resistant-bacterial-isolate-paenibacillus-jamilae-pkr1" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/31677.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">2230</span> The Effects and Interactions of Synthesis Parameters on Properties of Mg Substituted Hydroxyapatite</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20Sharma">S. Sharma</a>, <a href="https://publications.waset.org/abstracts/search?q=U.%20Batra"> U. Batra</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Kapoor"> S. Kapoor</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Dua"> A. Dua</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, the effects and interactions of reaction time and capping agent assistance during sol-gel synthesis of magnesium substituted hydroxyapatite nanopowder (MgHA) on hydroxyapatite (HA) to β-tricalcium phosphate (β-TCP) ratio, Ca/P ratio and mean crystallite size was examined experimentally as well as through statistical analysis. MgHA nanopowders were synthesized by sol-gel technique at room temperature using aqueous solution of calcium nitrate tetrahydrate, magnesium nitrate hexahydrate and potassium dihydrogen phosphate as starting materials. The reaction time for sol-gel synthesis was varied between 15 to 60 minutes. Two process routes were followed with and without addition of triethanolamine (TEA) in the solutions. The elemental compositions of as-synthesized powders were determined using X-ray fluorescence (XRF) spectroscopy. The functional groups present in the as-synthesized MgHA nanopowders were established through Fourier Transform Infrared Spectroscopy (FTIR). The amounts of phases present, Ca/P ratio and mean crystallite sizes of MgHA nanopowders were determined using X-ray diffraction (XRD). The HA content in biphasic mixture of HA and β-TCP and Ca/P ratio in as-synthesized MgHA nanopowders increased effectively with reaction time of sols (p < 0.0001, two way Anova), however, these were independent of TEA addition (p > 0.15, two way Anova). The MgHA nanopowders synthesized with TEA assistance exhibited 14 nm lower crystallite size (p < 0.018, 2 sample t-test) compared to the powder synthesized without TEA assistance. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=capping%20agent" title="capping agent">capping agent</a>, <a href="https://publications.waset.org/abstracts/search?q=hydroxyapatite" title=" hydroxyapatite"> hydroxyapatite</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=sol-gel" title=" sol-gel"> sol-gel</a>, <a href="https://publications.waset.org/abstracts/search?q=2-%20sample%20t-test" title=" 2- sample t-test"> 2- sample t-test</a>, <a href="https://publications.waset.org/abstracts/search?q=two-way%20analysis%20of%20variance%20%28ANOVA%29" title=" two-way analysis of variance (ANOVA)"> two-way analysis of variance (ANOVA)</a> </p> <a href="https://publications.waset.org/abstracts/35507/the-effects-and-interactions-of-synthesis-parameters-on-properties-of-mg-substituted-hydroxyapatite" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/35507.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">370</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">2229</span> Antimicrobial Activity of Functionalized Alpaca Fabrics with Silver Nanoparticles</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gina%20Zavaleta-Espejo">Gina Zavaleta-Espejo</a>, <a href="https://publications.waset.org/abstracts/search?q=Segundo%20R.%20J%C3%A1uregui-Rosas"> Segundo R. Jáuregui-Rosas</a>, <a href="https://publications.waset.org/abstracts/search?q=Fanny%20V.%20Samanamud-Moreno"> Fanny V. Samanamud-Moreno</a>, <a href="https://publications.waset.org/abstracts/search?q=Jos%C3%A9%20Salda%C3%B1a%20Jim%C3%A9nez"> José Saldaña Jiménez</a>, <a href="https://publications.waset.org/abstracts/search?q=Anibal%20Felix-Quintero"> Anibal Felix-Quintero</a>, <a href="https://publications.waset.org/abstracts/search?q=V%C3%ADctor%20Montero-Del%20Aguila"> Víctor Montero-Del Aguila</a>, <a href="https://publications.waset.org/abstracts/search?q=Elsi%20Mej%C3%ADa-Uriarte"> Elsi Mejía-Uriarte</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Vicugnapacos "alpaca" fabrics are considered special for their finesse, and the garments in the textile market are very luxurious. It has many special characteristics such as antiallergic, soft, hygroscopic, among others. In this sense, the research aimed to evaluate the antimicrobial activity of alpaca fabrics functionalized with silver nanoparticles on the bacteria Escherichia coli ATCC 25922 and Staphylococcus aureus ATCC 25923. For the functionalization of the fabrics, AgNO3 and different concentrations of trisodium citrate (TSC) 2, 6, and 10 mg. Tissue characterization was performed using Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The determination of the antimicrobial activity of the alpaca tissues was made by the Kirby-Bauer method with alpaca tissue discs functionalized with silver nanoparticles, an experimental design was made in completely randomized blocks with three treatments and a negative control with three repetitions. The results showed that inhibition halos were formed for both bacteria, therefore, the functionalized tissues have a high antimicrobial activity, whose mechanism of action is attributed to the free radicals (ROS) generated by the nanoparticles that cause oxidative damage to the bacteria. proteins and lipids of the bacterial cell wall. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antimicrobial" title="antimicrobial">antimicrobial</a>, <a href="https://publications.waset.org/abstracts/search?q=animal%20fibers" title=" animal fibers"> animal fibers</a>, <a href="https://publications.waset.org/abstracts/search?q=fabrics" title=" fabrics"> fabrics</a>, <a href="https://publications.waset.org/abstracts/search?q=functionalization" title=" functionalization"> functionalization</a>, <a href="https://publications.waset.org/abstracts/search?q=trisodium%20citrate" title=" trisodium citrate"> trisodium citrate</a> </p> <a href="https://publications.waset.org/abstracts/149105/antimicrobial-activity-of-functionalized-alpaca-fabrics-with-silver-nanoparticles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/149105.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">136</span> </span> </div> </div> <ul class="pagination"> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=FTIR%20spectroscopy&page=5" rel="prev">&lsaquo;</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=FTIR%20spectroscopy&page=1">1</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=FTIR%20spectroscopy&page=2">2</a></li> <li class="page-item"><a class="page-link" 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