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plasma</title> <meta name="description" content="Search results for: DBD oxygen plasma"> <meta name="keywords" content="DBD oxygen plasma"> <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="DBD oxygen plasma"> <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: DBD oxygen plasma</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2348</span> High-Production Laser and Plasma Welding Technologies for High-Speed Vessels Production</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=V.%20M.%20Levshakov">V. M. Levshakov</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20A.%20Steshenkova"> N. A. Steshenkova</a>, <a href="https://publications.waset.org/abstracts/search?q=N.%20A.%20Nosyrev"> N. A. Nosyrev</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Application of hulls processing technologies, based on high-concentrated energy sources (laser and plasma technologies), allow improve shipbuilding production. It is typical for high-speed vessels construction using steel and aluminum alloys with high precision hulls required. Report describes high-performance technologies for plasma welding (using direct current of reversed polarity), laser, and hybrid laser-arc welding of hulls structures developed by JSC “SSTC”. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=flat%20sections" title="flat sections">flat sections</a>, <a href="https://publications.waset.org/abstracts/search?q=hybrid%20laser-arc%20welding" title=" hybrid laser-arc welding"> hybrid laser-arc welding</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20welding" title=" plasma welding"> plasma welding</a>, <a href="https://publications.waset.org/abstracts/search?q=plasmatron" title=" plasmatron"> plasmatron</a> </p> <a href="https://publications.waset.org/abstracts/8894/high-production-laser-and-plasma-welding-technologies-for-high-speed-vessels-production" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8894.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">448</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">2347</span> Resistive Instability in a Multi Ions Hall Thrusters Plasma</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sukhmander%20Singh">Sukhmander Singh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hall thrusters are preferred over chemical thrusters because of its high exhaust velocity (around 10 times higher) and high specific impulse. The propellant Xenon is ionized inside the channel and controlled by the magnetic field. The strength of the magnetic field is such that only electrons get magnetized and ions remain unmagnetized because of larger Larmor radius as compared with the length of the channel of the device. There is quite a possibility of the existence of multi ions in a Hall thruster plasma because of dust contribution or another process which take place in the chamber. In this paper, we have derived the dispersion relation for multi ions resistive instability in a hall plasma. The analytical approach is also used to find out the propagating speed and the growth rate of the instability. In addition, some growing waves are also found to exist in the plasma. The dispersion relation is solved numerically to see the behavior of the instability with the plasma parameters viz, the temperature of plasma species, wave number, drift velocity, collision frequency, magnetic field. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=instability" title="instability">instability</a>, <a href="https://publications.waset.org/abstracts/search?q=resisitive" title=" resisitive"> resisitive</a>, <a href="https://publications.waset.org/abstracts/search?q=thrusters" title=" thrusters"> thrusters</a>, <a href="https://publications.waset.org/abstracts/search?q=waves" title=" waves"> waves</a> </p> <a href="https://publications.waset.org/abstracts/108866/resistive-instability-in-a-multi-ions-hall-thrusters-plasma" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/108866.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">312</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">2346</span> Comparison of Structure and Corrosion Properties of Titanium Oxide Films Prepared by Thermal Oxidation, DC Plasma Oxidation, and by the Sol-Gel</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=O.%20%C3%87omakl%C4%B1">O. Çomaklı</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Yaz%C4%B1c%C4%B1"> M. Yazıcı</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20Yetim"> T. Yetim</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20F.%20Yetim"> A. F. Yetim</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20%C3%87elik"> A. Çelik</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work, TiO₂ films were deposited on Cp-Ti substrates by thermal oxidation, DC plasma oxidation, and by the sol-gel method. Microstructures of uncoated and TiO₂ film coated samples were examined by X-ray diffraction and SEM. Thin oxide film consisting of anatase (A) and rutile (R) TiO₂ structures was observed on the surface of CP-Ti by under three different treatments. Also, the more intense anatase and rutile peaks appeared at samples plasma oxidized at 700˚C. The thicknesses of films were about 1.8 μm at the TiO₂ film coated samples by sol-gel and about 2.7 μm at thermal oxidated samples, while it was measured as 3.9 μm at the plasma oxidated samples. Electrochemical corrosion behaviour of uncoated and coated specimens was mainly carried out by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) in simulated body fluid (SBF) solution. Results showed that at the plasma oxidated samples exhibited a better resistance property to corrosion than that of other treatments. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=TiO%E2%82%82" title="TiO₂">TiO₂</a>, <a href="https://publications.waset.org/abstracts/search?q=CP-Ti" title=" CP-Ti"> CP-Ti</a>, <a href="https://publications.waset.org/abstracts/search?q=corrosion%20properties" title=" corrosion properties"> corrosion properties</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20oxidation" title=" thermal oxidation"> thermal oxidation</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20oxidation" title=" plasma oxidation"> plasma oxidation</a>, <a href="https://publications.waset.org/abstracts/search?q=sol-gel" title=" sol-gel"> sol-gel</a> </p> <a href="https://publications.waset.org/abstracts/74991/comparison-of-structure-and-corrosion-properties-of-titanium-oxide-films-prepared-by-thermal-oxidation-dc-plasma-oxidation-and-by-the-sol-gel" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/74991.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">2345</span> Protein and MDA (Malondialdehyde) Profil of Bull Sperm and Seminal Plasma After Freezing</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sri%20Rahayu">Sri Rahayu</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Dwi%20Susan"> M. Dwi Susan</a>, <a href="https://publications.waset.org/abstracts/search?q=Aris%20Soewondo"> Aris Soewondo</a>, <a href="https://publications.waset.org/abstracts/search?q=W.%20M.%20Agung%20Pramana"> W. M. Agung Pramana</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Semen is an organic fluid (seminal plasma) that contain spermatozoa. Proteins are one of the major seminal plasma components that modulate sperm functionality, influence sperm capacitation and maintaining the stability of the membrane. Semen freezing is a procedure to preserve sperm cells. The process causes decrease in sperm viability due to temperature shock and oxidation stress. Oxidation stress is a disturbance on phosphorylation that increases ROS concentration, and it produces lipid peroxide in spermatozoa membrane resulted in high MDA (malondialdehyde) concentration. The objective of this study was to examine the effect of freezing on protein and MDA profile of bovine sperm cell and seminal plasma after freezing. Protein and MDA of sperm cell and seminal plasma were isolated from 10 sample. Protein profiles was analyzed by SDS PAGE with separating gel 12,5 %. The concentration of MDA was measured by spectrophotometer. The results of the research indicated that freezing of semen cause lost of the seminal plasma proteins with molecular with 20, 10, and 9 kDa. In addition, the result research showed that protein of the sperm (26, 10, 9, 7, and 6 kDa) had been lost. There were difference MDA concentration of seminal plasma and sperm cell were increase after freezing. MDA concentration of seminal plasma before and after freezing were 2.2 and 2.4 nmol, respectively. MDA concentration of sperm cell before and after freezing were 1,5 and 1.8 nmol, respectively. In conclusion, there were differences protein profiles of spermatozoa before and after semen freezing and freezing cause increasing of the MDA concentration. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=MDA" title="MDA">MDA</a>, <a href="https://publications.waset.org/abstracts/search?q=semen%20freezing" title=" semen freezing"> semen freezing</a>, <a href="https://publications.waset.org/abstracts/search?q=SDS%20PAGE" title=" SDS PAGE"> SDS PAGE</a>, <a href="https://publications.waset.org/abstracts/search?q=protein%20profile" title=" protein profile"> protein profile</a> </p> <a href="https://publications.waset.org/abstracts/9455/protein-and-mda-malondialdehyde-profil-of-bull-sperm-and-seminal-plasma-after-freezing" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/9455.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">275</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">2344</span> Non-thermal Plasma Promotes Boar Sperm Quality Through Increasing AMPK Methylation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jiaojiao%20Zhang">Jiaojiao Zhang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Boar sperm quality, as an important indicator of reproductive efficiency, directly affects the efficiency of livestock production. Here, this study was conducted to improve the boar sperm quality by using a non-thermal dielectric barrier discharge (DBD) plasma. Our results showed that DBD plasma exposure at 2.1 W for 15 s could improve boar sperm quality by increasing the exon methylation level of adenosine monophosphate-activated protein kinase (AMPK) and thus improving the glycolytic flux, mitochondrial function, and antioxidant capacity without damaging the integrity of sperm DNA and acrosome. In addition, DBD plasma could rescue DNA methyltransferase inhibitor decitabine-caused low sperm quality by reducing oxidative stress and mitochondrial damage. Therefore, the application of non-thermal plasma provides a new strategy for reducing sperm oxidative damage and improving sperm quality, which shows great potential in assisted reproduction to solve the problem of male infertility. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=non-thermal%20DBD%20plasma" title="non-thermal DBD plasma">non-thermal DBD plasma</a>, <a href="https://publications.waset.org/abstracts/search?q=sperm%20quality" title=" sperm quality"> sperm quality</a>, <a href="https://publications.waset.org/abstracts/search?q=AMPK%20methylation" title=" AMPK methylation"> AMPK methylation</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20metabolism" title=" energy metabolism"> energy metabolism</a>, <a href="https://publications.waset.org/abstracts/search?q=antioxidant%20capacity" title=" antioxidant capacity"> antioxidant capacity</a> </p> <a href="https://publications.waset.org/abstracts/193854/non-thermal-plasma-promotes-boar-sperm-quality-through-increasing-ampk-methylation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/193854.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">9</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">2343</span> Plasma Treatment of a Lignite Using Water-Stabilized Plasma Torch at Atmospheric Pressure</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Anton%20Serov">Anton Serov</a>, <a href="https://publications.waset.org/abstracts/search?q=Alan%20Maslani"> Alan Maslani</a>, <a href="https://publications.waset.org/abstracts/search?q=Michal%20Hlina"> Michal Hlina</a>, <a href="https://publications.waset.org/abstracts/search?q=Vladimir%20Kopecky"> Vladimir Kopecky</a>, <a href="https://publications.waset.org/abstracts/search?q=Milan%20Hrabovsky"> Milan Hrabovsky</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Recycling of organic waste is an increasingly hot topic in recent years. This issue becomes even more interesting if the raw material for the fuel production can be obtained as the result of that recycling. A process of high-temperature decomposition of a lignite (a non-hydrolysable complex organic compound) was studied on the plasma gasification reactor PLASGAS, where water-stabilized plasma torch was used as a source of high enthalpy plasma. The plasma torch power was 120 kW and allowed heating of the reactor to more than 1000 °C. The material feeding rate in the gasification reactor was selected 30 and 60 kg per hour that could be compared with small industrial production. An efficiency estimation of the thermal decomposition process was done. A balance of the torch energy distribution was studied as well as an influence of the lignite particle size and an addition of methane (CH4) in a reaction volume on the syngas composition (H2+CO). It was found that the ratio H2:CO had values in the range of 1,5 to 2,5 depending on the experimental conditions. The recycling process occurred at atmospheric pressure that was one of the important benefits because of the lack of expensive vacuum pump systems. The work was supported by the Grant Agency of the Czech Republic under the project GA15-19444S. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=atmospheric%20pressure" title="atmospheric pressure">atmospheric pressure</a>, <a href="https://publications.waset.org/abstracts/search?q=lignite" title=" lignite"> lignite</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20treatment" title=" plasma treatment"> plasma treatment</a>, <a href="https://publications.waset.org/abstracts/search?q=water-stabilized%20plasma%20torch" title=" water-stabilized plasma torch"> water-stabilized plasma torch</a> </p> <a href="https://publications.waset.org/abstracts/47529/plasma-treatment-of-a-lignite-using-water-stabilized-plasma-torch-at-atmospheric-pressure" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/47529.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">373</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">2342</span> BTEX (Benzene, Toluene, Ethylbenzene and Xylene) Degradation by Cold Plasma</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Anelise%20Leal%20Vieira%20Cubas">Anelise Leal Vieira Cubas</a>, <a href="https://publications.waset.org/abstracts/search?q=Marina%20de%20Medeiros%20Machado"> Marina de Medeiros Machado</a>, <a href="https://publications.waset.org/abstracts/search?q=Mar%C3%ADlia%20de%20Medeiros%20Machado"> Marília de Medeiros Machado</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The volatile organic compounds - BTEX (Benzene, Toluene, Ethylbenzene, and Xylene) petroleum derivatives, have high rates of toxicity, which may carry consequences for human health, biota and environment. In this direction, this paper proposes a method of treatment of these compounds by using corona discharge plasma technology. The efficiency of the method was tested by analyzing samples of BTEX after going through a plasma reactor by gas chromatography method. The results show that the optimal residence time of the sample in the reactor was 8 minutes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=BTEX" title="BTEX">BTEX</a>, <a href="https://publications.waset.org/abstracts/search?q=degradation" title=" degradation"> degradation</a>, <a href="https://publications.waset.org/abstracts/search?q=cold%20plasma" title=" cold plasma"> cold plasma</a>, <a href="https://publications.waset.org/abstracts/search?q=ecological%20sciences" title=" ecological sciences"> ecological sciences</a> </p> <a href="https://publications.waset.org/abstracts/8639/btex-benzene-toluene-ethylbenzene-and-xylene-degradation-by-cold-plasma" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8639.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">317</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">2341</span> Particleboard Production from Atmospheric Plasma Treated Wheat Straw Particles</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=%C5%A0t%C4%9Bp%C3%A1n%20H%C3%BDsek">Štěpán Hýsek</a>, <a href="https://publications.waset.org/abstracts/search?q=Milan%20Podlena"> Milan Podlena</a>, <a href="https://publications.waset.org/abstracts/search?q=Milo%C5%A1%20Pavelek"> Miloš Pavelek</a>, <a href="https://publications.waset.org/abstracts/search?q=Mat%C4%9Bj%20Hodou%C5%A1ek"> Matěj Hodoušek</a>, <a href="https://publications.waset.org/abstracts/search?q=Martin%20B%C3%B6hm"> Martin Böhm</a>, <a href="https://publications.waset.org/abstracts/search?q=Petra%20Gajda%C4%8Dov%C3%A1"> Petra Gajdačová</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Particle boards have being used in the civil engineering as a decking for load bearing and non-load bearing vertical walls and horizontal panels (e. g. floors, ceiling, roofs) in a large scale. When the straw is used as non-wood material for manufacturing of lignocellulosic panels, problems with wax layer on the surface of the material can occur. Higher percentage of silica and wax cause the problems with the adhesion of the adhesive and this is the reason why it is necessary to break the surface layer for the better bonding effect. Surface treatment of the particles cause better mechanical properties, physical properties and the overall better results of the composite material are reached. Plasma application is one possibility how to modify the surface layer. The aim of this research is to modify the surface of straw particles by using cold plasma treatment. Surface properties of lignocellulosic materials were observed before and after cold plasma treatment. Cold plasma does not cause any structural changes deeply in the material. There are only changes in surface layers, which are required. Results proved that the plasma application influenced the properties of surface layers and the properties of composite material. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=composite" title="composite">composite</a>, <a href="https://publications.waset.org/abstracts/search?q=lignocellulosic%20materials" title=" lignocellulosic materials"> lignocellulosic materials</a>, <a href="https://publications.waset.org/abstracts/search?q=straw" title=" straw"> straw</a>, <a href="https://publications.waset.org/abstracts/search?q=cold%20plasma" title=" cold plasma"> cold plasma</a>, <a href="https://publications.waset.org/abstracts/search?q=surface%20treatment" title=" surface treatment"> surface treatment</a> </p> <a href="https://publications.waset.org/abstracts/72455/particleboard-production-from-atmospheric-plasma-treated-wheat-straw-particles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/72455.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">330</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">2340</span> Simulation for the Magnetized Plasma Compression Study</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Victor%20V.%20Kuzenov">Victor V. Kuzenov</a>, <a href="https://publications.waset.org/abstracts/search?q=Sergei%20V.%20Ryzhkov"> Sergei V. Ryzhkov</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ongoing experimental and theoretical studies on magneto-inertial confinement fusion (Angara, C-2, CJS-100, General Fusion, MagLIF, MAGPIE, MC-1, YG-1, Omega) and new constructing facilities (Baikal, C-2W, Z300 and Z800) require adequate modeling and description of the physical processes occurring in high-temperature dense plasma in a strong magnetic field. This paper presents a mathematical model, numerical method, and results of the computer analysis of the compression process and the energy transfer in the target plasma, used in magneto-inertial fusion (MIF). The computer simulation of the compression process of the magnetized target by the high-power laser pulse and the high-speed plasma jets is presented. The characteristic patterns of the two methods of the target compression are being analysed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=magnetized%20target" title="magnetized target">magnetized target</a>, <a href="https://publications.waset.org/abstracts/search?q=magneto-inertial%20fusion" title=" magneto-inertial fusion"> magneto-inertial fusion</a>, <a href="https://publications.waset.org/abstracts/search?q=mathematical%20model" title=" mathematical model"> mathematical model</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20and%20laser%20beams" title=" plasma and laser beams"> plasma and laser beams</a> </p> <a href="https://publications.waset.org/abstracts/66035/simulation-for-the-magnetized-plasma-compression-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/66035.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">296</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2339</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">2338</span> Nanoprofiling of GaAs Surface in a Combined Low-Temperature Plasma for Microwave Devices</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Victor%20S.%20Klimin">Victor S. Klimin</a>, <a href="https://publications.waset.org/abstracts/search?q=Alexey%20A.%20Rezvan"> Alexey A. Rezvan</a>, <a href="https://publications.waset.org/abstracts/search?q=Maxim%20S.%20Solodovnik"> Maxim S. Solodovnik</a>, <a href="https://publications.waset.org/abstracts/search?q=Oleg%20A.%20Ageev"> Oleg A. Ageev</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, the problems of existing methods of profiling and surface modification of nanoscale arsenide-gallium structures are analyzed. The use of a combination of methods of local anodic oxidation and plasma chemical etching to solve this problem is considered. The main features that make this technology one of the promising areas of modification and profiling of near-surface layers of solids are demonstrated. In this paper, we studied the effect of formation stress and etching time on the geometrical parameters of the etched layer and the roughness of the etched surface. Experimental dependences of the thickness of the etched layer on the time and stress of formation were obtained. The surface analysis was carried out using atomic force microscopy methods, the corresponding profilograms were constructed from the obtained images, and the roughness of the etched surface was studied accordingly. It was shown that at high formation voltage, the depth of the etched surface increased, this is due to an increase in the number of active particles (oxygen ions and hydroxyl groups) formed as a result of the decomposition of water molecules in an electric field, during the formation of oxide nanostructures on the surface of gallium arsenide. Oxide layers were used as negative masks for subsequent plasma chemical etching by the STE ICPe68 unit. BCl₃ was chosen as the chlorine-containing gas, which differs from analogs in some parameters for the effect of etching of nanostructures based on gallium arsenide in the low-temperature plasma. The gas mixture of reaction chamber consisted of a buffer gas NAr = 100 cm³/min and a chlorine-containing gas NBCl₃ = 15 cm³/min at a pressure P = 2 Pa. The influence of these methods modes, which are formation voltage and etching time, on the roughness and geometric parameters, and corresponding dependences are demonstrated. Probe nanotechnology was used for surface analysis. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanostructures" title="nanostructures">nanostructures</a>, <a href="https://publications.waset.org/abstracts/search?q=GaAs" title=" GaAs"> GaAs</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20chemical%20etching" title=" plasma chemical etching"> plasma chemical etching</a>, <a href="https://publications.waset.org/abstracts/search?q=modification%20structures" title=" modification structures"> modification structures</a> </p> <a href="https://publications.waset.org/abstracts/106770/nanoprofiling-of-gaas-surface-in-a-combined-low-temperature-plasma-for-microwave-devices" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/106770.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">145</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">2337</span> Studies on the Solubility of Oxygen in Water Using a Hose to fill the Air with Different Shapes</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Wichan%20Lertlop">Wichan Lertlop</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This research is to study the solubility of oxygen in water taking the form of aeration pipes that have different shaped objectives of the research to compare the amount of oxygen dissolved in the water, whice take the form of aeration pipes. Shaped differently When aeration 5 minutes on air for 10 minutes, and when air fills 30 minutes, as well as compare the durability of the oxygen is dissolved in the water of the inlet air refueling shaped differently when you fill the air 30 minutes and when. aeration and 60 minutes populations used in this study, the population of pond water from Rajabhat University in February 2014 used in this study consists of 1. Aerator 2. Hose using a hose to fill the air with 3 different shape, different shapes pyramid whose base is on the water tank. Shaped rectangular water tank onto the ground. And shapes in a vertical pipe. 3 meter, dissolved oxygen, dissolved in water to get the calibration standard. 4. The clock for timer 5. Three water tanks which are 39 cm wide, 51 cm long and 32 cm high. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aeration" title="aeration">aeration</a>, <a href="https://publications.waset.org/abstracts/search?q=dissolve%20oxygen" title=" dissolve oxygen"> dissolve oxygen</a>, <a href="https://publications.waset.org/abstracts/search?q=different%20shapes" title=" different shapes"> different shapes</a> </p> <a href="https://publications.waset.org/abstracts/10005/studies-on-the-solubility-of-oxygen-in-water-using-a-hose-to-fill-the-air-with-different-shapes" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10005.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">310</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">2336</span> Ergosterol Biosynthesis: Non-Conventional Method for Improving Process</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Madalina%20Postaru">Madalina Postaru</a>, <a href="https://publications.waset.org/abstracts/search?q=Alexandra%20Tucaliuc"> Alexandra Tucaliuc</a>, <a href="https://publications.waset.org/abstracts/search?q=Dan%20Cascaval"> Dan Cascaval</a>, <a href="https://publications.waset.org/abstracts/search?q=Anca%20Irina%20Galaction"> Anca Irina Galaction</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ergosterol (ergosta-5,7,22-trien-3β-ol) is the precursor of vitamin D2 (ergocalciferol), known as provitamin D2 as it is converted under UV radiation to this vitamin. The natural sources of ergosterol are mainly the yeasts (Saccharomyces sp., Candida sp.), but it can be also found in fungus (Claviceps sp.) or plants (orchids). As ergosterol is mainly accumulated in yeast cell membranes, especially in free form in the plasma-membrane, and the chemical synthesis of ergosterol does not represent an efficient method for its production, this study aimed to analyze the influence of aeration efficiency on ergosterol production by S. cerevisiae in batch and fed-batch fermentations, by considering different levels of mixing intensity, aeration rate, and n-dodecane concentration. Our previous studies on ergosterol production by S. cerevisiae in batch and fed-batch fermentation systems indicated that the addition of n-dodecane led to the increase of almost 50% of this sterol concentration, the highest productivity being reached for the fed-batch process. The experiments were carried out in a laboratory stirred bioreactor, provided with computer-controlled and recorded parameters. In batch fermentation system, the study indicated that the oxygen mass transfer coefficient, kLa, is amplified for about 3 times by increasing the volumetric concentration of n-dodecane from 0 to 15%. Moreover, the increase of dissolved oxygen concentration by adding n-dodecane leads to the diminution for 3.5 times of the produced alcohol amount. In fed-batch fermentation process, the positive influence of hydrocarbon on oxygen transfer rate is amplified mainly at its higher concentration level, as the result of the increased yeasts cells amount. Thus, by varying n-dodecane concentration from 0 to 15% vol., the kLa value increase becomes more important than for the batch fermentation, being of 4 times <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ergosterol" title="ergosterol">ergosterol</a>, <a href="https://publications.waset.org/abstracts/search?q=yeast%20fermentation" title=" yeast fermentation"> yeast fermentation</a>, <a href="https://publications.waset.org/abstracts/search?q=n-dodecane" title=" n-dodecane"> n-dodecane</a>, <a href="https://publications.waset.org/abstracts/search?q=oxygen-vector" title=" oxygen-vector"> oxygen-vector</a> </p> <a href="https://publications.waset.org/abstracts/116342/ergosterol-biosynthesis-non-conventional-method-for-improving-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/116342.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">119</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">2335</span> A Study of the Growth of Single-Phase Mg0.5Zn0.5O Films for UV LED</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hong%20Seung%20Kim">Hong Seung Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Chang%20Hoi%20Kim"> Chang Hoi Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Lili%20Yue"> Lili Yue</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Single-phase, high band gap energy Zn0.5Mg0.5O films were grown under oxygen pressure, using pulse laser deposition with a Zn0.5Mg0.5O target. Structural characterization studies revealed that the crystal structures of the ZnX-1MgXO films could be controlled via changes in the oxygen pressure. TEM analysis showed that the thickness of the deposited Zn1-xMgxO thin films was 50–75 nm. As the oxygen pressure increased, we found that one axis of the crystals did not show a very significant increase in the crystallization compared with that observed at low oxygen pressure. The X-ray diffraction peak intensity for the hexagonal-ZnMgO (002) plane increased relative to that for the cubic-ZnMgO (111) plane. The corresponding c-axis of the h-ZnMgO lattice constant increased from 5.141 to 5.148 Å, and the a-axis of the c-ZnMgO lattice constant decreased from 4.255 to 4.250 Å. EDX analysis showed that the Mg content in the mixed-phase ZnMgO films decreased significantly, from 54.25 to 46.96 at.%. As the oxygen pressure was increased from 100 to 150 mTorr, the absorption edge red-shifted from 3.96 to 3.81 eV; however, a film grown at the highest oxygen pressure tested here (200 mTorr). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=MgO" title="MgO">MgO</a>, <a href="https://publications.waset.org/abstracts/search?q=UV%20LED" title=" UV LED"> UV LED</a>, <a href="https://publications.waset.org/abstracts/search?q=ZnMgO" title=" ZnMgO"> ZnMgO</a>, <a href="https://publications.waset.org/abstracts/search?q=ZnO" title=" ZnO"> ZnO</a> </p> <a href="https://publications.waset.org/abstracts/6244/a-study-of-the-growth-of-single-phase-mg05zn05o-films-for-uv-led" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6244.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">403</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2334</span> Investigation of Fusion Zone Microstructures in Plasma Arc Welding of Austenitic Stainless Steel (SS-304L) with Low Carbon Steel (A-36) with or without Filler Alloy</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Shan-e-Fatima">Shan-e-Fatima</a>, <a href="https://publications.waset.org/abstracts/search?q=Mushtaq%20Khan"> Mushtaq Khan</a>, <a href="https://publications.waset.org/abstracts/search?q=Syed%20Imran%20Hussian"> Syed Imran Hussian</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Plasma arc welding technology is used for welding SS-304L with A-36. Two different optimize butt welded joints were produced by using austenitic filler alloy E-309L and with direct fusion at 45 A, 2mm/sec by keeping plasma gas flow rate at 0.5LPM. Microstructure analysis of the weld bead was carried out. The results reveal complex heterogeneous microstructure in austenitic base filler alloy sample where as full martensite was found in directly fused sample. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fusion%20zone%20microstructure" title="fusion zone microstructure">fusion zone microstructure</a>, <a href="https://publications.waset.org/abstracts/search?q=stainless%20steel" title=" stainless steel"> stainless steel</a>, <a href="https://publications.waset.org/abstracts/search?q=low%20carbon%20steel" title=" low carbon steel"> low carbon steel</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20arc%20welding" title=" plasma arc welding"> plasma arc welding</a> </p> <a href="https://publications.waset.org/abstracts/14603/investigation-of-fusion-zone-microstructures-in-plasma-arc-welding-of-austenitic-stainless-steel-ss-304l-with-low-carbon-steel-a-36-with-or-without-filler-alloy" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/14603.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">575</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">2333</span> A Study on the Etching Characteristics of High aspect ratio Oxide Etching Using C4F6 Plasma in Inductively Coupled Plasma with Low Frequency Bias</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=ByungJun%20Woo">ByungJun Woo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, high-aspect-ratio (HAR) oxide etching characteristics in inductively coupled plasma were investigated using low frequency (2 MHz) bias power with C4F6 gas. An experiment was conducted using CF4/C4F6/He as the mixed gas. A 100 nm (etch area)/500 nm (mask area) line patterns were used, and the etch cross-section and etch selectivity of the amorphous carbon layer thin film were derived using a scanning electron microscope. Ion density was extracted using a double Langmuir probe, and CFx and F neutral species were observed via optical emission spectroscopy. Based on these results, the possibility for HAR oxide etching using C4F6 gas chemistry was suggested in this work. These etching results also indicate that the use of C4F6 gas can significantly contribute to the development of next-generation HAR oxide etching. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=plasma" title="plasma">plasma</a>, <a href="https://publications.waset.org/abstracts/search?q=etching" title=" etching"> etching</a>, <a href="https://publications.waset.org/abstracts/search?q=C4F6" title=" C4F6"> C4F6</a>, <a href="https://publications.waset.org/abstracts/search?q=high%20aspect%20ratio" title=" high aspect ratio"> high aspect ratio</a>, <a href="https://publications.waset.org/abstracts/search?q=inductively%20coupled%20plasma" title=" inductively coupled plasma"> inductively coupled plasma</a> </p> <a href="https://publications.waset.org/abstracts/183420/a-study-on-the-etching-characteristics-of-high-aspect-ratio-oxide-etching-using-c4f6-plasma-in-inductively-coupled-plasma-with-low-frequency-bias" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/183420.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">73</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">2332</span> Impact of the Oxygen Content on the Optoelectronic Properties of the Indium-Tin-Oxide Based Transparent Electrodes for Silicon Heterojunction Solar Cells</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Brahim%20Aissa">Brahim Aissa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Transparent conductive oxides (TCOs) used as front electrodes in solar cells must feature simultaneously high electrical conductivity, low contact resistance with the adjacent layers, and an appropriate refractive index for maximal light in-coupling into the device. However, these properties may conflict with each other, motivating thereby the search for TCOs with high performance. Additionally, due to the presence of temperature sensitive layers in many solar cell designs (for example, in thin-film silicon and silicon heterojunction (SHJ)), low-temperature deposition processes are more suitable. Several deposition techniques have been already explored to fabricate high-mobility TCOs at low temperatures, including sputter deposition, chemical vapor deposition, and atomic layer deposition. Among this variety of methods, to the best of our knowledge, magnetron sputtering deposition is the most established technique, despite the fact that it can lead to damage of underlying layers. The Sn doped In₂O₃ (ITO) is the most commonly used transparent electrode-contact in SHJ technology. In this work, we studied the properties of ITO thin films grown by RF sputtering. Using different oxygen fraction in the argon/oxygen plasma, we prepared ITO films deposited on glass substrates, on one hand, and on a-Si (p and n-types):H/intrinsic a-Si/glass substrates, on the other hand. Hall Effect measurements were systematically conducted together with total-transmittance (TT) and total-reflectance (TR) spectrometry. The electrical properties were drastically affected whereas the TT and TR were found to be slightly impacted by the oxygen variation. Furthermore, the time of flight-secondary ion mass spectrometry (TOF-SIMS) technique was used to determine the distribution of various species throughout the thickness of the ITO and at various interfaces. The depth profiling of indium, oxygen, tin, silicon, phosphorous, boron and hydrogen was investigated throughout the various thicknesses and interfaces, and obtained results are discussed accordingly. Finally, the extreme conditions were selected to fabricate rear emitter SHJ devices, and the photovoltaic performance was evaluated; the lower oxygen flow ratio was found to yield the best performance attributed to lower series resistance. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=solar%20cell" title="solar cell">solar cell</a>, <a href="https://publications.waset.org/abstracts/search?q=silicon%20heterojunction" title=" silicon heterojunction"> silicon heterojunction</a>, <a href="https://publications.waset.org/abstracts/search?q=oxygen%20content" title=" oxygen content"> oxygen content</a>, <a href="https://publications.waset.org/abstracts/search?q=optoelectronic%20properties" title=" optoelectronic properties"> optoelectronic properties</a> </p> <a href="https://publications.waset.org/abstracts/90133/impact-of-the-oxygen-content-on-the-optoelectronic-properties-of-the-indium-tin-oxide-based-transparent-electrodes-for-silicon-heterojunction-solar-cells" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/90133.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">159</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">2331</span> Plasma-Induced Modification of Biomolecules: A Tool for Analysis of Protein Structures</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yuting%20Wu">Yuting Wu</a>, <a href="https://publications.waset.org/abstracts/search?q=Faraz%20Choudhury"> Faraz Choudhury</a>, <a href="https://publications.waset.org/abstracts/search?q=Daniel%20Benjamin"> Daniel Benjamin</a>, <a href="https://publications.waset.org/abstracts/search?q=James%20Whalin"> James Whalin</a>, <a href="https://publications.waset.org/abstracts/search?q=Joshua%20Blatz"> Joshua Blatz</a>, <a href="https://publications.waset.org/abstracts/search?q=Leon%20Shohet"> Leon Shohet</a>, <a href="https://publications.waset.org/abstracts/search?q=Michael%20Sussman"> Michael Sussman</a>, <a href="https://publications.waset.org/abstracts/search?q=Mark%20Richards"> Mark Richards</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Plasma-Induced Modification of Biomolecules (PLIMB) has been developed as a technology, which, together with mass spectrometry, measures three-dimensional structural characteristics of proteins. This technique uses hydroxyl radicals generated by atmospheric-pressure plasma discharge to react with the solvent-accessible side chains of protein in an aqueous solution. In this work, we investigate the three-dimensional structure of hemoglobin and myoglobin using PLIMB. Additional modifications to these proteins, such as oxidation, fragmentations, and conformational changes caused by PLIMB are also explored. These results show that PLIMB, coupled with mass spectrometry, is an effective way to determine solvent access to hemoproteins. Furthermore, we show that many factors, including pH and the electrical parameters used to generate the plasma, have a significant influence on solvent accessibility. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=plasma" title="plasma">plasma</a>, <a href="https://publications.waset.org/abstracts/search?q=hemoglobin" title=" hemoglobin"> hemoglobin</a>, <a href="https://publications.waset.org/abstracts/search?q=myoglobin" title=" myoglobin"> myoglobin</a>, <a href="https://publications.waset.org/abstracts/search?q=solvent%20access" title=" solvent access"> solvent access</a> </p> <a href="https://publications.waset.org/abstracts/124966/plasma-induced-modification-of-biomolecules-a-tool-for-analysis-of-protein-structures" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/124966.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">193</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">2330</span> Quantom Magnetic Effects of P-B Fusion in Plasma Focus Devices</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Habibi">M. Habibi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The feasibility of proton-boron fusion in plasmoids caused by magneto hydrodynamics instabilities in plasma focus devices is studied analytically. In plasmoids, fusion power for 76 keV < Ti < 1500 keV exceeds bremsstrahlung loss (W/Pb=5.39). In such situation gain factor and the ratio of Te to Ti for a typical 150 kJ plasma focus device will be 7.8 and 4.8 respectively. Also with considering the ion viscous heating effect, W/Pb and Ti/Te will be 2.7 and 6 respectively. Strong magnetic field will reduces ion-electron collision rate due to quantization of electron orbits. While approximately there is no change in electron-ion collision rate, the effect of quantum magnetic field makes ions much hotter than electrons which enhance the fraction of fusion power to bremsstrahlung loss. Therefore self-sustained p-11B fusion reactions would be possible and it could be said that p-11B fuelled plasma focus device is a clean and efficient source of energy. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=plasmoids" title="plasmoids">plasmoids</a>, <a href="https://publications.waset.org/abstracts/search?q=p11B%20fuel" title=" p11B fuel"> p11B fuel</a>, <a href="https://publications.waset.org/abstracts/search?q=ion%20viscous%20heating" title=" ion viscous heating"> ion viscous heating</a>, <a href="https://publications.waset.org/abstracts/search?q=quantum%20magnetic%20field" title=" quantum magnetic field"> quantum magnetic field</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20focus%20device" title=" plasma focus device"> plasma focus device</a> </p> <a href="https://publications.waset.org/abstracts/26776/quantom-magnetic-effects-of-p-b-fusion-in-plasma-focus-devices" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/26776.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">463</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">2329</span> Mineral Status of Feeds and Fodder and Its Subsequent Effect on Plasma of Livestock and Its Products in Red Lateritic Zone of West Bengal, India</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20K.%20Pyne">S. K. Pyne</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Mondal"> M. Mondal</a>, <a href="https://publications.waset.org/abstracts/search?q=G.%20Samanta"> G. Samanta</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A survey was carried out in red lateritic zone of West Bengal to compare the mineral status in plasma of livestock grazing over red lateritic region. Sufficient number of samples of soil, feeds, fodder and blood were collected from four districts of red lateritic zone namely, West Midnapore, Birbhum, Bankura and Purulia respectively. The samples were analysed for Calcium (Ca), Phosphorus (P), Copper (Cu), Zinc (Zn), Manganese (Mn) and Iron (Fe). Concentration of Cu, Mn and Fe in soil were above the minimum critical level, whereas, Zn deficiency is wide spread in red lateritic soil. Paddy straw is deficient in Ca, P, Zn and Mn in the region. Green fodders are also deficient in P, Cu, Zn. The richness of iron (Fe) in soil, feeds, fodder and tree leaves is the characteristics of this region. Phosphorus is deficient in plasma of all categories of livestock with the exception of bullock. Cu is deficient in plasma of calf. Plasma Mn and Fe were higher (p<0.01) in the animals of red lateritic zone. The study reveals that the overall deficiency of phosphorus in different categories of livestock and there is need of dietary supplementation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mineral" title="mineral">mineral</a>, <a href="https://publications.waset.org/abstracts/search?q=red%20lateritic%20zone" title=" red lateritic zone"> red lateritic zone</a>, <a href="https://publications.waset.org/abstracts/search?q=grazing%20livestock" title=" grazing livestock"> grazing livestock</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma" title=" plasma"> plasma</a> </p> <a href="https://publications.waset.org/abstracts/46146/mineral-status-of-feeds-and-fodder-and-its-subsequent-effect-on-plasma-of-livestock-and-its-products-in-red-lateritic-zone-of-west-bengal-india" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/46146.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">329</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">2328</span> Macroscopic Evaluation of the Effect of Low-Level Laser and Plasma Jet on Wound Healing in Rats</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zahra%20Tabarsi">Zahra Tabarsi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehdi%20Marjani"> Mehdi Marjani</a>, <a href="https://publications.waset.org/abstracts/search?q=Alireza%20Najafpour"> Alireza Najafpour</a>, <a href="https://publications.waset.org/abstracts/search?q=Alborz%20Mirzade"> Alborz Mirzade</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of this study was to evaluate and compare the macroscopic effect of low level laser and plasma jet for wound healing in rats. The study was performed on 40 old male white rats with an average weight of 250 g and an average age of the same age. After preparing the rats from Ibn Sina Research Institute, they were kept the same for one week under environmental conditions such as temperature, humidity and light, and nutrition such as the type of diet and the number of meals. Then, to start the research, rats were randomly divided into two groups (A): laser treatment of wounds, group (B): plasma wound treatment. All rats were inhibited 4 hours before each anesthesia under conditions of abstinence and up to 2 hours after drinking water. Rats were anesthetized by intraperitoneal injection of ketamine 10% and xylazine 2%.After scrubbing between two shoulders of each rat, a circular wound was created by sterile 5 mm biopsy puncture. Group A rats were treated with low level laser in three sessions and group B in three sessions with argon plasma. Based on the observed results, it seems that Low level laser radiation has more acceptable and appropriate effects than cold plasma on the healing of rat skin wounds. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=low-level%20laser" title="low-level laser">low-level laser</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20jet" title=" plasma jet"> plasma jet</a>, <a href="https://publications.waset.org/abstracts/search?q=rat" title=" rat"> rat</a>, <a href="https://publications.waset.org/abstracts/search?q=wound%20healing" title=" wound healing"> wound healing</a> </p> <a href="https://publications.waset.org/abstracts/151027/macroscopic-evaluation-of-the-effect-of-low-level-laser-and-plasma-jet-on-wound-healing-in-rats" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/151027.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">110</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">2327</span> Computational Quantum Mechanics Study of Oxygen as Substitutional Atom in Diamond</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=K.%20M.%20Etmimi">K. M. Etmimi</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20A.%20Sghayer"> A. A. Sghayer</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20M.%20Gsiea"> A. M. Gsiea</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20M.%20Abutruma"> A. M. Abutruma</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Relatively few chemical species can be incorporated into diamond during CVD growth, and until recently the uptake of oxygen was thought to be low perhaps as a consequence of a short surface residence time. Within the literature, there is speculation regarding spectroscopic evidence for O in diamond, but no direct evidence. For example, the N3 and OK1 EPR centres have been tentatively assigned models made up from complexes of substitutional N and substitutional oxygen. In this study, we report density-functional calculations regarding the stability, electronic structures, geometry and hyperfine interaction of substitutional oxygen in diamond and show that the C2v, S=1 configuration very slightly lower in energy than the other configurations (C3v, Td, and C2v with S=0). The electronic structure of O in diamond generally gives rise to two defect-related energy states in the band gap one a non-degenerate a1 state lying near the middle of the energy gap and the other a threefold-degenerate t2 state located close to the conduction band edges. The anti-bonding a1 and t2 states will be occupied by one to three electrons for O+, O and O− respectively. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=DFT" title="DFT">DFT</a>, <a href="https://publications.waset.org/abstracts/search?q=oxygen" title=" oxygen"> oxygen</a>, <a href="https://publications.waset.org/abstracts/search?q=diamond" title=" diamond"> diamond</a>, <a href="https://publications.waset.org/abstracts/search?q=hyperfine" title=" hyperfine"> hyperfine</a> </p> <a href="https://publications.waset.org/abstracts/19564/computational-quantum-mechanics-study-of-oxygen-as-substitutional-atom-in-diamond" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/19564.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">375</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">2326</span> Development of Soft-Core System for Heart Rate and Oxygen Saturation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Caje%20F.%20Pinto">Caje F. Pinto</a>, <a href="https://publications.waset.org/abstracts/search?q=Jivan%20S.%20Parab"> Jivan S. Parab</a>, <a href="https://publications.waset.org/abstracts/search?q=Gourish%20M.%20Naik"> Gourish M. Naik</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper is about the development of non-invasive heart rate and oxygen saturation in human blood using Altera NIOS II soft-core processor system. In today's world, monitoring oxygen saturation and heart rate is very important in hospitals to keep track of low oxygen levels in blood. We have designed an Embedded System On Peripheral Chip (SOPC) reconfigurable system by interfacing two LED’s of different wavelengths (660 nm/940 nm) with a single photo-detector to measure the absorptions of hemoglobin species at different wavelengths. The implementation of the interface with Finger Probe and Liquid Crystal Display (LCD) was carried out using NIOS II soft-core system running on Altera NANO DE0 board having target as Cyclone IVE. This designed system is used to monitor oxygen saturation in blood and heart rate for different test subjects. The designed NIOS II processor based non-invasive heart rate and oxygen saturation was verified with another Operon Pulse oximeter for 50 measurements on 10 different subjects. It was found that the readings taken were very close to the Operon Pulse oximeter. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=heart%20rate" title="heart rate">heart rate</a>, <a href="https://publications.waset.org/abstracts/search?q=NIOS%20II" title=" NIOS II"> NIOS II</a>, <a href="https://publications.waset.org/abstracts/search?q=oxygen%20saturation" title=" oxygen saturation"> oxygen saturation</a>, <a href="https://publications.waset.org/abstracts/search?q=photoplethysmography" title=" photoplethysmography"> photoplethysmography</a>, <a href="https://publications.waset.org/abstracts/search?q=soft-core" title=" soft-core"> soft-core</a>, <a href="https://publications.waset.org/abstracts/search?q=SOPC" title=" SOPC"> SOPC</a> </p> <a href="https://publications.waset.org/abstracts/82788/development-of-soft-core-system-for-heart-rate-and-oxygen-saturation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/82788.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">195</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2325</span> Fabrication of Aluminum Nitride Thick Layers by Modified Reactive Plasma Spraying</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=C%C3%A9cile%20Dufloux">Cécile Dufloux</a>, <a href="https://publications.waset.org/abstracts/search?q=Klaus%20B%C3%B6ttcher"> Klaus Böttcher</a>, <a href="https://publications.waset.org/abstracts/search?q=Heike%20Oppermann"> Heike Oppermann</a>, <a href="https://publications.waset.org/abstracts/search?q=J%C3%BCrgen%20Wollweber"> Jürgen Wollweber</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hexagonal aluminum nitride (AlN) is a promising candidate for several wide band gap semiconductor compound applications such as deep UV light emitting diodes (UVC LED) and fast power transistors (HEMTs). To date, bulk AlN single crystals are still commonly grown from the physical vapor transport (PVT). Single crystalline AlN wafers obtained from this process could offer suitable substrates for a defect-free growth of ultimately active AlGaN layers, however, these wafers still lack from small sizes, limited delivery quantities and high prices so far.Although there is already an increasing interest in the commercial availability of AlN wafers, comparatively cheap Si, SiC or sapphire are still predominantly used as substrate material for the deposition of active AlGaN layers. Nevertheless, due to a lattice mismatch up to 20%, the obtained material shows high defect densities and is, therefore, less suitable for high power devices as described above. Therefore, the use of AlN with specially adapted properties for optical and sensor applications could be promising for mass market products which seem to fulfill fewer requirements. To respond to the demand of suitable AlN target material for the growth of AlGaN layers, we have designed an innovative technology based on reactive plasma spraying. The goal is to produce coarse grained AlN boules with N-terminated columnar structure and high purity. In this process, aluminum is injected into a microwave stimulated nitrogen plasma. AlN, as the product of the reaction between aluminum powder and the plasma activated N2, is deposited onto the target. We used an aluminum filament as the initial material to minimize oxygen contamination during the process. The material was guided through the nitrogen plasma so that the mass turnover was 10g/h. To avoid any impurity contamination by an erosion of the electrodes, an electrode-less discharge was used for the plasma ignition. The pressure was maintained at 600-700 mbar, so the plasma reached a temperature high enough to vaporize the aluminum which subsequently was reacting with the surrounding plasma. The obtained products consist of thick polycrystalline AlN layers with a diameter of 2-3 cm. The crystallinity was determined by X-ray crystallography. The grain structure was systematically investigated by optical and scanning electron microscopy. Furthermore, we performed a Raman spectroscopy to provide evidence of stress in the layers. This paper will discuss the effects of process parameters such as microwave power and deposition geometry (specimen holder, radiation shields, ...) on the topography, crystallinity, and stress distribution of AlN. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=aluminum%20nitride" title="aluminum nitride">aluminum nitride</a>, <a href="https://publications.waset.org/abstracts/search?q=polycrystal" title=" polycrystal"> polycrystal</a>, <a href="https://publications.waset.org/abstracts/search?q=reactive%20plasma%20spraying" title=" reactive plasma spraying"> reactive plasma spraying</a>, <a href="https://publications.waset.org/abstracts/search?q=semiconductor" title=" semiconductor"> semiconductor</a> </p> <a href="https://publications.waset.org/abstracts/47813/fabrication-of-aluminum-nitride-thick-layers-by-modified-reactive-plasma-spraying" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/47813.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">281</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">2324</span> Effects of Acacia Honey Drink Ingestion during Rehydration after Exercise Compared to Sports Drink on Physiological Parameters and Subsequent Running Performance in the Heat</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Foong%20Kiew%20Ooi">Foong Kiew Ooi</a>, <a href="https://publications.waset.org/abstracts/search?q=Aidi%20Naim%20Mohamad%20Samsani"> Aidi Naim Mohamad Samsani</a>, <a href="https://publications.waset.org/abstracts/search?q=Chee%20Keong%20Chen"> Chee Keong Chen</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Saat%20Ismail"> Mohamed Saat Ismail</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Introduction: Prolonged exercise in a hot and humid environment can result in glycogen depletion and associated with loss of body fluid. Carbohydrate contained in sports beverages is beneficial for improving sports performance and preventing dehydration. Carbohydrate contained in honey is believed can be served as an alternative form of carbohydrate for enhancing sports performance. Objective: To investigate the effectiveness of honey drink compared to sports drink as a recovery aid for running performance and physiological parameters in the heat. Method: Ten male recreational athletes (age: 22.2 ± 2.0 years, VO2max: 51.5 ± 3.7 ml.kg-1.min-1) participated in this randomized cross-over study. On each trial, participants were required to run for 1 hour in the glycogen depletion phase (Run-1), followed by a rehydration phase for 2 hours and subsequently a 20 minutes time trial performance (Run-2). During Run-1, subjects were required to run on the treadmill in the heat (31°C) with 70% relative humidity at 70 % of their VO2max. During rehydration phase, participants drank either honey drink or sports drink, or plain water with amount equivalent to 150% of body weight loss in dispersed interval (60 %, 50 % and 40 %) at 0 min, 30 min and 60 min respectively. Subsequently, time trial was performed by the participants in 20 minutes and the longest distance covered was recorded. Physiological parameters were analysed using two-way ANOVA with repeated measure and time trial performance was analysed using one-way ANOVA. Results: Result showed that Acacia honey elicited a better time trial performance with significantly longer distance compared to water trial (P<0.05). However, there was no significant difference between Acacia honey and sport drink trials (P > 0.05). Acacia honey and sports drink trials elicited 249 m (8.24 %) and 211 m (6.79 %) longer in distance compared to the water trial respectively. For physiological parameters, plasma glucose, plasma insulin and plasma free fatty acids in Acacia honey and sports drink trials were significantly higher compared to the water trial respectively during rehydration phase and time trial running performance phase. There were no significant differences in body weight changes, oxygen uptake, hematocrit, plasma volume changes and plasma cortisol in all the trials. Conclusion: Acacia honey elicited greatest beneficial effects on sports performance among the drinks, thus it has potential to be used for rehydration in athletes who train and compete in hot environment. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=honey%20drink" title="honey drink">honey drink</a>, <a href="https://publications.waset.org/abstracts/search?q=rehydration" title=" rehydration"> rehydration</a>, <a href="https://publications.waset.org/abstracts/search?q=sports%20performance" title=" sports performance"> sports performance</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20glucose" title=" plasma glucose"> plasma glucose</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20insulin" title=" plasma insulin"> plasma insulin</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20cortisol" title=" plasma cortisol"> plasma cortisol</a> </p> <a href="https://publications.waset.org/abstracts/66944/effects-of-acacia-honey-drink-ingestion-during-rehydration-after-exercise-compared-to-sports-drink-on-physiological-parameters-and-subsequent-running-performance-in-the-heat" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/66944.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">309</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">2323</span> An Efficient Automated Radiation Measuring System for Plasma Monopole Antenna</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Gurkirandeep%20Kaur">Gurkirandeep Kaur</a>, <a href="https://publications.waset.org/abstracts/search?q=Rana%20Pratap%20Yadav"> Rana Pratap Yadav</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This experimental study is aimed to examine the radiation characteristics of different plasma structures of a surface wave-driven plasma antenna by an automated measuring system. In this study, a 30 cm long plasma column of argon gas with a diameter of 3 cm is excited by surface wave discharge mechanism operating at 13.56 MHz with RF power level up to 100 Watts and gas pressure between 0.01 to 0.05 mb. The study reveals that a single structured plasma monopole can be modified into an array of plasma antenna elements by forming multiple striations or plasma blobs inside the discharge tube by altering the values of plasma properties such as working pressure, operating frequency, input RF power, discharge tube dimensions, i.e., length, radius, and thickness. It is also reported that plasma length, electron density, and conductivity are functions of operating plasma parameters and controlled by changing working pressure and input power. To investigate the antenna radiation efficiency for the far-field region, an automation-based radiation measuring system has been fabricated and presented in detail. This developed automated system involves a combined setup of controller, dc servo motors, vector network analyzer, and computing device to evaluate the radiation intensity, directivity, gain and efficiency of plasma antenna. In this system, the controller is connected to multiple motors for moving aluminum shafts in both elevation and azimuthal plane whereas radiation from plasma monopole antenna is measured by a Vector Network Analyser (VNA) which is further wired up with the computing device to display radiations in polar plot forms. Here, the radiation characteristics of both continuous and array plasma monopole antenna have been studied for various working plasma parameters. The experimental results clearly indicate that the plasma antenna is as efficient as a metallic antenna. The radiation from plasma monopole antenna is significantly influenced by plasma properties which provides a wider range in radiation pattern where desired radiation parameters like beam-width, the direction of radiation, radiation intensity, antenna efficiency, etc. can be achieved in a single monopole. Due to its wide range of selectivity in radiation pattern; this can meet the demands of wider bandwidth to get high data speed in communication systems. Moreover, this developed system provides an efficient and cost-effective solution for measuring the radiation pattern in far-field zone for any kind of antenna system. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antenna%20radiation%20characteristics" title="antenna radiation characteristics">antenna radiation characteristics</a>, <a href="https://publications.waset.org/abstracts/search?q=dynamically%20reconfigurable" title=" dynamically reconfigurable"> dynamically reconfigurable</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20antenna" title=" plasma antenna"> plasma antenna</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20column" title=" plasma column"> plasma column</a>, <a href="https://publications.waset.org/abstracts/search?q=plasma%20striations" title=" plasma striations"> plasma striations</a>, <a href="https://publications.waset.org/abstracts/search?q=surface%20wave" title=" surface wave"> surface wave</a> </p> <a href="https://publications.waset.org/abstracts/93278/an-efficient-automated-radiation-measuring-system-for-plasma-monopole-antenna" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/93278.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">119</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">2322</span> Mid-Temperature Methane-Based Chemical Looping Reforming for Hydrogen Production via Iron-Based Oxygen Carrier Particles</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yang%20Li">Yang Li</a>, <a href="https://publications.waset.org/abstracts/search?q=Mingkai%20Liu"> Mingkai Liu</a>, <a href="https://publications.waset.org/abstracts/search?q=Qiong%20Rao"> Qiong Rao</a>, <a href="https://publications.waset.org/abstracts/search?q=Zhongrui%20Gai"> Zhongrui Gai</a>, <a href="https://publications.waset.org/abstracts/search?q=Ying%20Pan"> Ying Pan</a>, <a href="https://publications.waset.org/abstracts/search?q=Hongguang%20Jin"> Hongguang Jin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hydrogen is an ideal and potential energy carrier due to its high energy efficiency and low pollution. An alternative and promising approach to hydrogen generation is the chemical looping steam reforming of methane (CL-SRM) over iron-based oxygen carriers. However, the process faces challenges such as high reaction temperature (>850 ℃) and low methane conversion. We demonstrate that Ni-mixed Fe-based oxygen carrier particles have significantly improved the methane conversion and hydrogen production rate in the range of 450-600 ℃ under atmospheric pressure. The effect on the reaction reactivity of oxygen carrier particles mixed with different Ni-based particle mass ratios has been determined in the continuous unit. More than 85% of methane conversion has been achieved at 600 ℃, and hydrogen can be produced in both reduction and oxidation steps. Moreover, the iron-based oxygen carrier particles exhibited good cyclic performance during 150 consecutive redox cycles at 600 ℃. The mid-temperature iron-based oxygen carrier particles, integrated with a moving-bed chemical looping system, might provide a powerful approach toward more efficient and scalable hydrogen production. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=chemical%20looping" title="chemical looping">chemical looping</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrogen%20production" title=" hydrogen production"> hydrogen production</a>, <a href="https://publications.waset.org/abstracts/search?q=mid-temperature" title=" mid-temperature"> mid-temperature</a>, <a href="https://publications.waset.org/abstracts/search?q=oxygen%20carrier%20particles" title=" oxygen carrier particles"> oxygen carrier particles</a> </p> <a href="https://publications.waset.org/abstracts/162319/mid-temperature-methane-based-chemical-looping-reforming-for-hydrogen-production-via-iron-based-oxygen-carrier-particles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/162319.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">141</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">2321</span> Heat Transfer Analysis of a Multiphase Oxygen Reactor Heated by a Helical Tube in the Cu-Cl Cycle of a Hydrogen Production</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mohammed%20W.%20Abdulrahman">Mohammed W. Abdulrahman</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the thermochemical water splitting process by Cu-Cl cycle, oxygen gas is produced by an endothermic thermolysis process at a temperature of 530<sup>o</sup>C. Oxygen production reactor is a three-phase reactor involving cuprous chloride molten salt, copper oxychloride solid reactant and oxygen gas. To perform optimal performance, the oxygen reactor requires accurate control of heat transfer to the molten salt and decomposing solid particles within the thermolysis reactor. In this paper, the scale up analysis of the oxygen reactor that is heated by an internal helical tube is performed from the perspective of heat transfer. A heat balance of the oxygen reactor is investigated to analyze the size of the reactor that provides the required heat input for different rates of hydrogen production. It is found that the helical tube wall and the service side constitute the largest thermal resistances of the oxygen reactor system. In the analysis of this paper, the Cu-Cl cycle is assumed to be heated by two types of nuclear reactor, which are HTGR and CANDU SCWR. It is concluded that using CANDU SCWR requires more heat transfer rate by 3-4 times than that when using HTGR. The effect of the reactor aspect ratio is also studied and it is found that increasing the aspect ratio decreases the number of reactors and the rate of decrease in the number of reactors decreases by increasing the aspect ratio. Comparisons between the results of this study and pervious results of material balances in the oxygen reactor show that the size of the oxygen reactor is dominated by the heat balance rather than the material balance. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=heat%20transfer" title="heat transfer">heat transfer</a>, <a href="https://publications.waset.org/abstracts/search?q=Cu-Cl%20cycle" title=" Cu-Cl cycle"> Cu-Cl cycle</a>, <a href="https://publications.waset.org/abstracts/search?q=hydrogen%20production" title=" hydrogen production"> hydrogen production</a>, <a href="https://publications.waset.org/abstracts/search?q=oxygen" title=" oxygen"> oxygen</a>, <a href="https://publications.waset.org/abstracts/search?q=clean%20energy" title=" clean energy"> clean energy</a> </p> <a href="https://publications.waset.org/abstracts/45088/heat-transfer-analysis-of-a-multiphase-oxygen-reactor-heated-by-a-helical-tube-in-the-cu-cl-cycle-of-a-hydrogen-production" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/45088.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">261</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">2320</span> Influence of La0.1Sr0.9Co1-xFexO3-δ Catalysts on Oxygen Permeation Using Mixed Conductor</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Y.%20Muto">Y. Muto</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Araki"> S. Araki</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Yamamoto"> H. Yamamoto</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The separation of oxygen is one key technology to improve the efficiency and to reduce the cost for the processed of the partial oxidation of the methane and the condensation of the carbon dioxide. Particularly, carbon dioxide at high concentration would be obtained by the combustion using pure oxygen separated from air. However, the oxygen separation process occupied the large part of energy consumption. Therefore, it is considered that the membrane technologies enable to separation at lower cost and lower energy consumption than conventional methods. In this study, it is examined that the separation of oxygen using membranes of mixed conductors. Oxygen permeation through the membrane is occurred by the following three processes. At first, the oxygen molecules dissociate into oxygen ion at feed side of the membrane, subsequently, oxygen ions diffuse in the membrane. Finally, oxygen ions recombine to form the oxygen molecule. Therefore, it is expected that the membrane of thickness and material, or catalysts of the dissociation and recombination affect the membrane performance. However, there is little article about catalysts for the dissociation and recombination. We confirmed the performance of La0.6Sr0.4Co1.0O3-δ (LSC) based catalyst which was commonly used as the dissociation and recombination. It is known that the adsorbed amount of oxygen increase with the increase of doped Fe content in B site of LSC. We prepared the catalysts of La0.1Sr0.9Co0.9Fe0.1O3-δ(C9F1), La0.1Sr0.9Co0.5Fe0.5O3-δ(C5F5) and La0.1Sr0.9Co0.3Fe0.7O3-δ(C7F3). Also, we used Pr2NiO4 type mixed conductor as a membrane material. (Pr0.9La0.1)2(Ni0.74Cu0.21Ga0.05)O4+δ(PLNCG) shows the high oxygen permeability and the stability against carbon dioxide. Oxygen permeation experiments were carried out using a homemade apparatus at 850 -975 °C. The membrane was sealed with Pyrex glass at both end of the outside dense alumina tubes. To measure the oxygen permeation rate, air was fed to the film side at 50 ml min-1, helium as the sweep gas and reference gas was fed at 20 ml min-1. The flow rates of the sweep gas and the gas permeated through the membrane were measured using flow meter and the gas concentrations were determined using a gas chromatograph. Then, the permeance of the oxygen was determined using the flow rate and the concentration of the gas on the permeate side of the membrane. The increase of oxygen permeation was observed with increasing temperature. It is considered that this is due to the catalytic activities are increased with increasing temperature. Another reason is the increase of oxygen diffusivity in the bulk of membrane. The oxygen permeation rate is improved by using catalyst of LSC or LSCF. The oxygen permeation rate of membrane with LSCF showed higher than that of membrane with LSC. Furthermore, in LSCF catalysts, oxygen permeation rate increased with the increase of the doped amount of Fe. It is considered that this is caused by the increased of adsorbed amount of oxygen. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=membrane%20separation" title="membrane separation">membrane separation</a>, <a href="https://publications.waset.org/abstracts/search?q=oxygen%20permeation" title=" oxygen permeation"> oxygen permeation</a>, <a href="https://publications.waset.org/abstracts/search?q=K2NiF4-type%20structure" title=" K2NiF4-type structure"> K2NiF4-type structure</a>, <a href="https://publications.waset.org/abstracts/search?q=mixed%20conductor" title=" mixed conductor"> mixed conductor</a> </p> <a href="https://publications.waset.org/abstracts/35526/influence-of-la01sr09co1-xfexo3-d-catalysts-on-oxygen-permeation-using-mixed-conductor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/35526.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">519</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">2319</span> Modeling of Hydrogen Production by Inductively Coupled Methane Plasma for Input Power Pin=700W</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abdelatif%20Gadoum">Abdelatif Gadoum</a>, <a href="https://publications.waset.org/abstracts/search?q=Djilali%20Benyoucef"> Djilali Benyoucef</a>, <a href="https://publications.waset.org/abstracts/search?q=Mouloudj%20Hadj"> Mouloudj Hadj</a>, <a href="https://publications.waset.org/abstracts/search?q=Alla%20Eddine%20Toubal%20Maamar"> Alla Eddine Toubal Maamar</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Habib%20Allah%20%20Lahoual"> Mohamed Habib Allah Lahoual</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hydrogen occurs naturally in the form of chemical compounds, most often in water and hydrocarbons. The main objective of this study is 2D modeling of hydrogen production in inductively coupled plasma in methane at low pressure. In the present model, we include the motions and the collisions of both neutral and charged particles by considering 19 species (i.e in total ; neutrals, radicals, ions, and electrons), and more than 120 reactions (electron impact with methane, neutral-neutral, neutral-ions and surface reactions). The results show that the rate conversion of methane reach 90% and the hydrogen production is about 30%. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hydrogen%20production" title="hydrogen production">hydrogen production</a>, <a href="https://publications.waset.org/abstracts/search?q=inductively%20coupled%20plasma" title=" inductively coupled plasma"> inductively coupled plasma</a>, <a href="https://publications.waset.org/abstracts/search?q=fluid%20model" title=" fluid model"> fluid model</a>, <a href="https://publications.waset.org/abstracts/search?q=methane%20plasma" title=" methane plasma"> methane plasma</a> </p> <a href="https://publications.waset.org/abstracts/123259/modeling-of-hydrogen-production-by-inductively-coupled-methane-plasma-for-input-power-pin700w" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/123259.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> 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