Search results for: A. R. Varasteh

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Varasteh</title> <meta name="description" content="Search results for: A. R. Varasteh"> <meta name="keywords" content="A. R. Varasteh"> <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 navbar-toggler ml-auto" type="button" data-toggle="collapse" data-target="#navbarMenu" aria-controls="navbarMenu" aria-expanded="false" aria-label="Toggle navigation"> <span class="navbar-toggler-icon"></span> </button> <div class="w-100"> <div class="d-none d-lg-flex flex-row-reverse"> <form method="get" action="https://waset.org/search" class="form-inline my-2 my-lg-0"> <input class="form-control mr-sm-2" type="search" placeholder="Search Conferences" value="A. 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R. Varasteh"> <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> 3</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: A. R. Varasteh</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3</span> The Construction of a Probiotic Lactic Acid Bacterium Expressing Acid-Resistant Phytase Enzyme</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=R.%20Majidzadeh%20Heravi">R. Majidzadeh Heravi</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Sankian"> M. Sankian</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Kermanshahi"> H. Kermanshahi</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20R.%20Nassiri"> M. R. Nassiri</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Heravi%20Moussavi"> A. Heravi Moussavi</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20A.%20Lari"> S. A. Lari</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20R.%20Varasteh"> A. R. Varasteh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The use of probiotics engineered to express specific enzymes has been the subject of considerable attention in poultry industry because of increased nutrient availability and reduced cost of enzyme supplementation. Phytase enzyme is commonly added to poultry feed to improve digestibility and availability of phosphorus from plant sources. To construct a probiotic with potential of phytate degradation, phytase gene (<em>appA</em>) from <em>E. coli</em> was cloned and transformed into two probiotic bacteria <em>Lactobacillus salivarius</em> and <em>Lactococcus lactis</em>. <em>L. salivarous</em> showed plasmid instability, unable to express the gene. The expression of <em>appA</em> gene in <em>L. lactis</em> was analyzed by detecting specific RNA and zymography assay. Phytase enzyme was isolated from cellular extracts of recombinant <em>L. lactis, </em>showing a 46 kDa band upon the SDS-PAGE analysis. Zymogram also confirmed the phytase activity of the 46 kDa band corresponding to the enzyme. An enzyme activity of 4.9U/ml was obtained in cell extracts of <em>L. lactis</em>. The growth of native and recombinant <em>L. lactis</em> was similar in the presence of two concentrations of ox bile. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Lactobacillus%20salivarus" title="Lactobacillus salivarus">Lactobacillus salivarus</a>, <a href="https://publications.waset.org/abstracts/search?q=Lactococcuslactis" title=" Lactococcuslactis"> Lactococcuslactis</a>, <a href="https://publications.waset.org/abstracts/search?q=recombinant" title=" recombinant"> recombinant</a>, <a href="https://publications.waset.org/abstracts/search?q=phytase" title=" phytase"> phytase</a>, <a href="https://publications.waset.org/abstracts/search?q=poultry" title=" poultry"> poultry</a> </p> <a href="https://publications.waset.org/abstracts/30949/the-construction-of-a-probiotic-lactic-acid-bacterium-expressing-acid-resistant-phytase-enzyme" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/30949.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">490</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">2</span> Combining in vitro Protein Expression with AlphaLISA Technology to Study Protein-Protein Interaction</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Shayli%20Varasteh%20Moradi">Shayli Varasteh Moradi</a>, <a href="https://publications.waset.org/abstracts/search?q=Wayne%20A.%20Johnston"> Wayne A. Johnston</a>, <a href="https://publications.waset.org/abstracts/search?q=Dejan%20Gagoski"> Dejan Gagoski</a>, <a href="https://publications.waset.org/abstracts/search?q=Kirill%20Alexandrov"> Kirill Alexandrov</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The demand for a rapid and more efficient technique to identify protein-protein interaction particularly in the areas of therapeutics and diagnostics development is growing. The method described here is a rapid in vitro protein-protein interaction analysis approach based on AlphaLISA technology combined with Leishmania tarentolae cell-free protein production (LTE) system. Cell-free protein synthesis allows the rapid production of recombinant proteins in a multiplexed format. Among available in vitro expression systems, LTE offers several advantages over other eukaryotic cell-free systems. It is based on a fast growing fermentable organism that is inexpensive in cultivation and lysate production. High integrity of proteins produced in this system and the ability to co-express multiple proteins makes it a desirable method for screening protein interactions. Following the translation of protein pairs in LTE system, the physical interaction between proteins of interests is analysed by AlphaLISA assay. The assay is performed using unpurified in vitro translation reaction and therefore can be readily multiplexed. This approach can be used in various research applications such as epitope mapping, antigen-antibody analysis and protein interaction network mapping. The intra-viral protein interaction network of Zika virus was studied using the developed technique. The viral proteins were co-expressed pair-wise in LTE and all possible interactions among viral proteins were tested using AlphaLISA. The assay resulted to the identification of 54 intra-viral protein-protein interactions from which 19 binary interactions were found to be novel. The presented technique provides a powerful tool for rapid analysis of protein-protein interaction with high sensitivity and throughput. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=AlphaLISA%20technology" title="AlphaLISA technology">AlphaLISA technology</a>, <a href="https://publications.waset.org/abstracts/search?q=cell-free%20protein%20expression" title=" cell-free protein expression"> cell-free protein expression</a>, <a href="https://publications.waset.org/abstracts/search?q=epitope%20mapping" title=" epitope mapping"> epitope mapping</a>, <a href="https://publications.waset.org/abstracts/search?q=Leishmania%20tarentolae" title=" Leishmania tarentolae"> Leishmania tarentolae</a>, <a href="https://publications.waset.org/abstracts/search?q=protein-protein%20interaction" title=" protein-protein interaction"> protein-protein interaction</a> </p> <a href="https://publications.waset.org/abstracts/81407/combining-in-vitro-protein-expression-with-alphalisa-technology-to-study-protein-protein-interaction" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/81407.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">237</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">1</span> Sensitivity Analysis of the Heat Exchanger Design in Net Power Oxy-Combustion Cycle for Carbon Capture</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hirbod%20Varasteh">Hirbod Varasteh</a>, <a href="https://publications.waset.org/abstracts/search?q=Hamidreza%20Gohari%20Darabkhani"> Hamidreza Gohari Darabkhani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The global warming and its impact on climate change is one of main challenges for current century. Global warming is mainly due to the emission of greenhouse gases (GHG) and carbon dioxide (CO<sub>2</sub>) is known to be the major contributor to the GHG emission profile. Whilst the energy sector is the primary source for CO<sub>2</sub> emission, Carbon Capture and Storage (CCS) are believed to be the solution for controlling this emission. Oxyfuel combustion (Oxy-combustion) is one of the major technologies for capturing CO<sub>2</sub> from power plants. For gas turbines, several Oxy-combustion power cycles (Oxyturbine cycles) have been investigated by means of thermodynamic analysis. NetPower cycle is one of the leading oxyturbine power cycles with almost full carbon capture capability from a natural gas fired power plant. In this manuscript, sensitivity analysis of the heat exchanger design in NetPower cycle is completed by means of process modelling. The heat capacity variation and supercritical CO<sub>2 </sub>with gaseous admixtures are considered for multi-zone analysis with Aspen Plus software. It is found that the heat exchanger design has a major role to increase the efficiency of NetPower cycle. The pinch-point analysis is done to extract the composite and grand composite curve for the heat exchanger. In this paper, relationship between the cycle efficiency and the minimum approach temperature (鈭員min) of the heat exchanger has also been evaluated.  Increase in 鈭員min causes a decrease in the temperature of the recycle flue gases (RFG) and an overall decrease in the required power for the recycled gas compressor. The main challenge in the design of heat exchangers in power plants is a tradeoff between the capital and operational costs. To achieve lower 鈭員min, larger size of heat exchanger is required. This means a higher capital cost but leading to a better heat recovery and lower operational cost. To achieve this, 鈭員min is selected from the minimum point in the diagrams of capital and operational costs. This study provides an insight into the NetPower Oxy-combustion cycle’s performance analysis and operational condition based on its heat exchanger design. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20capture%20and%20storage" title="carbon capture and storage">carbon capture and storage</a>, <a href="https://publications.waset.org/abstracts/search?q=oxy-combustion" title=" oxy-combustion"> oxy-combustion</a>, <a href="https://publications.waset.org/abstracts/search?q=netpower%20cycle" title=" netpower cycle"> netpower cycle</a>, <a href="https://publications.waset.org/abstracts/search?q=oxy%20turbine%20cycles" title=" oxy turbine cycles"> oxy turbine cycles</a>, <a href="https://publications.waset.org/abstracts/search?q=zero%20emission" title=" zero emission"> zero emission</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20exchanger%20design" title=" heat exchanger design"> heat exchanger design</a>, <a href="https://publications.waset.org/abstracts/search?q=supercritical%20carbon%20dioxide" title=" supercritical carbon dioxide"> supercritical carbon dioxide</a>, <a href="https://publications.waset.org/abstracts/search?q=oxy-fuel%20power%20plant" title=" oxy-fuel power plant"> oxy-fuel power plant</a>, <a href="https://publications.waset.org/abstracts/search?q=pinch%20point%20analysis" title=" pinch point analysis"> pinch point analysis</a> </p> <a href="https://publications.waset.org/abstracts/85218/sensitivity-analysis-of-the-heat-exchanger-design-in-net-power-oxy-combustion-cycle-for-carbon-capture" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/85218.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">204</span> </span> </div> </div> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div 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Search results for: A. R. Varasteh