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Preparation,characterization and thermophysical properties investigation of A70/polyaniline nanocomposite phase change material for medium temperature solar applications

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能源与人工环境(英文) 2021年第3期2卷 271-277页

作者： A.K.Pandey Mathew George Nasrudin Abd Rahim V.V.tyagi Syed Shahabuddin R.Saidur Research Centre for Nano-Materials and Energy Technology(RCNMET) School of Science and TechnologySunway UniversityNo.5Jalan UniversitiBandar SunwayPetaling Jaya47500 Selangor Darul EhsanMalaysia Higher Institution Centre of Excellence(HICoE) UM Power Energy Dedicated Advanced Centre(UMPEDAC)Level 4Wisma R&DUniversity of MalayaJalan Pantai Baharu59990 Kuala LumpurMalaysia Renewable Energy Research Group King Abdulaziz UniversityJeddah 21589Saudi Arabia School of Energy Management Shri Mata Vaishno Devi UniversityKatra 182320(J&K)India Department of Science School of TechnologyPandit Deendayal Petroleum UniversityKnowledge CorridorRaisan VillageGandhinagar 382007GujratIndia

The ever-present demand for energy from various application in industrial and domestic processes has led to the consumption of fossil fuel at a rapid rate with adverse effect due to global *** study focuses on the thermal energy storage aspect intended for medium temperature applications.A novel composite A70 and PANI was prepared and *** study investigates the composites thermophysical and optical *** Scanning Calorimetry and Transient Hot Bridge measured thermal storage capacity and thermal conductivity of the composite,*** heat storage capacity of the composite remained stable within 4%whereas a highest rise of 11.96%in thermal conductivity was *** composites thermal,chemical,and physical stability were analysed from Thermogravimetric Analyser,Fourier Infrared Transform,and Scanning Electron Microscope,*** composites were thermally stable up to a temperature of 250°*** chemical reaction occurred between the nanomaterial and base PCM *** microscopic visuals did not show any considerable change in the microscopic structure of the *** the case of optical properties,the composites showed significant reduction in transmittance of solar spectrum with respect to pure *** maximum decrement in transmission was around~89%compared to *** the composite prepared were thermally stable till 250°C,hence may be utilized for solar thermal and low concentrated photovoltaic application but not limited to these.

关键词： Phase change materials Solar energy Thermal conductivity Latent heat Polyaniline

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Liposome mediated drug delivery for leukocyte adhesion deficieny I （LAD I）： Targeting the mutated gene ITGB2 and expression of CD18 protein

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Frontiers in Biology 2014年第1期9卷 1-4页

作者： C. Subathra DEVI Kritika KEDARINATH Payal CHOUDHARY Vishakha tyagi Mohanasrinivasan. V School of Biosciences and Technology VIT University Vellore 632014 Tamil Nadu India

Leukocyte adhesion deficiency （LAD） I is a disorder caused due to mutations in a gene （ITGB2） located on chromosome 21 and encodes the β2 subunit of the leukocyte integrin molecules. This leads to defects in the adhesion of leukocytes on endothelial cells which further leads to recurrent microbial infections due to a decrease in the immune response. Base Excision Repair Mechanism （BER） is instrumental in repairing damaged DNA by removing mutated/ damaged bases. We have proposed a hypothesis for the treatment of LAD I by making use of the proteins/enzyme complexes responsible for base excision repair mechanism be introduced into the leukocytes via liposomes. This will target the mutated gene in the leukocytes （mostly neutrophils） and DNA repair will occur. The liposomes can be introduced into the patients via intravenous methods.

关键词： CDI8 β-integrin LAD I liposome BER ITGB2

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Caring for the elderly

Caring for the elderly

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作者： (editor.)Paltasingh Tattwamasi (editor.)tyagi Renu

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不同冲击冷却结构对旋转效应的敏感性

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工程热物理学报 2016年第1期37卷 37-41页

作者：杨力 Kartikeya tyagi 任静 Srinath Ekkad 蒋洪德清华大学热能工程系北京100084 弗吉尼亚理工学院

本文针对多排孔冲击和通道之间倾斜冲击结构进行了旋转条件下数值模拟研究,通过流场和传热分析了不同结构和不同部位对旋转科氏力和离心力的敏感性。冲击射流动量较大,旋转数小,且旋转二次流发展空间不足,导致多排孔冲击结构对旋转的敏... 详细信息

本文针对多排孔冲击和通道之间倾斜冲击结构进行了旋转条件下数值模拟研究,通过流场和传热分析了不同结构和不同部位对旋转科氏力和离心力的敏感性。冲击射流动量较大,旋转数小,且旋转二次流发展空间不足,导致多排孔冲击结构对旋转的敏感性降低。通道之间双排倾斜冲击结构对旋转的影响比多排孔冲击结构敏感,主要体现在下游前缘的冲击靶面上。根据旋转数大小采用非对称的射流结构可以优化传热分布。

关键词：旋转冲击冷却科氏力

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Significant Factors for Reliability Estimation of Component Based Software Systems

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Journal of Software Engineering and Applications 2014年第11期7卷 934-942页

作者： Kirti tyagi Arun Sharma Ajay Kumar Garg Engineering College Ghaziabad India Department of Information Technology Indira Gandhi Delhi Technical University for Women (IGDTUW)Kashmere Gate Delhi

Software reliability is defined as the probability of the failure-free operation of a software system for a specified period of time in a specified environment. Traditional approaches for software reliability analysis are black box approaches. These approaches use the software as a whole. At present, main emphasis of software is on reuse, hence component based software applications came into existence. Black box models are not appropriate for these applications. This paper introduces some significant factors for reliability estimation of Component Based Software Applications. Reliability of Component Based Software Application depends upon these factors. This paper?also gives the definition of factors and explains its relation with reliability of software application.

关键词： Failure Rate Reliability Component Based Systems Flexibility Operational Profile

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Synthesis, characterization and biocidal properties of platinum metal complexes derived from 2,6-diacetylpyridine (bis thiosemicarbazone)

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Open Journal of Inorganic Chemistry 2012年第3期2卷 41-48页

作者： Monika tyagi Sulekh Chandra Department of Chemistry Zakir Husain Delhi College (University of Delhi) J. L. N. Marg New Delhi - 110 002 India

The coordination compounds of PdII, PtII, RhIII and IrIII metal ions with a Schiff base ligand (L) i.e. 2,6- diacetylpyridine bis(thiosemicarbazone) have been synthesized and characterized by elemental analyses, molar conductance, magnetic susceptibility measurements, IR, NMR and electronic spectral studies. On the basis of molar conductance and elemental analyses the complexes were found to have composition [M(L)]Cl2 and [M’(L)Cl]Cl2, where M = Pd(II), Pt(II) and M’ = Rh(III), Ir(III). The spectral studies reveal that the complexes possess monomeric composition. Complexes of PdII and PtII were found to have four coordinated square planar geometry whereas the complexes of RhIII and IrIII posses six coordinated octahedral geometry. The ligand field parameters were calculated using various energy level diagrams. In vitro synthesized compounds and metal salts have been tested against some species of plant pathogenic fungi and bacteria in order to assess their antimicrobial properties.

关键词： Schiff Base Platinum Metal Complexes Spectral Studies Biological Screening

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Study of Eppler 423 Airfoil with Gurney Flap and Vortex Generators

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Advances in Aerospace Science and Technology 2020年第1期5卷 1-19页

作者： Sushil Chandra Rajan tyagi Aerospace Engineering Department IIT Bombay Mumbai India

In the past extensive research has been carried out, to study the effect of Gurney flap (GF) on symmetric and cambered airfoil for its usage in low Reynolds number regime. Use of GF at the trailing edge of the airfoil enhances the lift due to increase in the effective camber of the airfoil, which in turn improves the aerodynamic efficiency i.e. Cl/Cd. In the present study, Eppler 423 airfoil is used to first understand the aerodynamics of such a highly cambered airfoil and later GF of various sizes were added on it to understand the change in flow dynamics achieved by adding the GF and their impact on aerodynamic parameters such as Cl, Cd and Cl/Cd. Eppler 423 being a highly cambered airfoil produces high lift coefficient and smoother stall and by adding the GF of various sizes the performance of Eppler 423 improves tremendously and reason for this enhanced performance and effect of size of GF are presented in this paper. Vortex Generators (VG) generate counter rotating vortices that allow the flow to remain attached even at high angles of attack. Also, effect of adding VG at the leading edge of Eppler 423 aerofoil is presented in this paper. At last, results obtained from combination of VG at leading edge and GF at trailing edge on Eppler 423 aerofoil are discussed at length.

关键词： Eppler 423 Airfoil Gurney Flap Vortex Generators Aerodynamic Efficiency Stall

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Biodiesel production from microbial lipid obtained by intermittent feeding of municipal sludge and treated crude glycerol

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Systems Microbiology and Biomanufacturing 2021年第3期1卷 344-355页

作者： Lalit R.Kumar Sravan K.Yellapu R.D.tyagi Patrick Drogui INRS-ETE Universite du QuebecQuebec G1K 9A9Canada School of Technology Huzhou UniversityHuzhouChina BOSK BIOPRODUCTS 100-399 rue JacquardQuebec G1N 4J6Canada

In the present study,municipal secondary sludge and purified glycerol(obtained after acid treatment of crude glycerol)were used together for lipid production using intermittent feeding *** sludge feeding strategy(sludge SS 30 g/L)resulted in a higher biomass(54.99 g/L)and lipid concentration(25.35 g/L)at 96 h when compared to 35 g/L SS single sludge feeding or control strategy(45.67 g/L biomass&19.16 g/L lipid).Moreover,the intermittent sludge feeding strategy significantly reduced foaming and requirement of anti-foam during fermentation when compared to control *** energy balance of biodiesel production from lipid obtained by intermittent sludge feeding strategy(30 g/L SS)was energeti-cally *** was also revealed from yield coefficients and energy balance that sludge had an important contribution in microbial lipid and biodiesel production.

关键词： Intermittent feeding Municipal Sludge Purified glycerol Microbial lipid Biodiesel

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Optimization of trace elements in purified glycerol for microbial lipid and citric acid production by Yarrowia lipolytica SKY7

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Systems Microbiology and Biomanufacturing 2021年第1期1卷 76-89页

作者： Lalit R.Kumar Sravan K.Yellapu R.D.tyagi Patrick Drogui INRS-ETE 490Rue de la CouronneQuebecQC G1K 9A9Canada

Purified glycerol obtained after acid treatment of crude glycerol solution was used as the carbon source for lipid and citric acid production using *** *** purified glycerol was high in phosphorus,it was important to inves-tigate the impact of fortification of trace elements in the medium on cell growth,lipid and citric acid(CA)*** all the trace elements(including phosphates and sulfates)required for growth and lipid production were added to the purified glycerol medium,high biomass(51.67 g/L)and lipid concentration(19.47 g/L)were observed at 96 h of fed-batch fermentation with low CA concentration of 5.42 g/*** purified glycerol medium without additional trace elements gave low biomass(27.67 g/L),lipid concentration(9.35 g/L)at 80 h of fed-batch fermentation,but gave high CA concentration(24.51 g/L).When purified glycerol was provided with only sulfates or all elements except KH_(2)PO_(4),low biomass(32.59 g/L and 38.52 g/L)and citric acid concentration(1 g/L and 2.42 g/L)were obtained at 96 h.

关键词： Yarrowia lipolytica SKY7 Purified glycerol Trace elements Microbial lipid Citric acid

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Cell-type specificity of β-actin expression and its clinicopathological correlation in gastric adenocarcinoma

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World Journal of Gastroenterology 2014年第34期20卷 12202-12211页

作者： Shafqat A Khan Monica tyagi Ajit K Sharma Savio G Barreto Bhawna Sirohi Mukta Ramadwar Shailesh V Shrikhande Sanjay Gupta Epigenetics and Chromatin Biology Group Cancer Research InstituteAdvanced Centre for Treatment Research and Education in CancerTata Memorial CentreKhargharNavi MumbaiMH 410210India Gastrointestinal and Hepato-Pancreato-Biliary Service Department of Surgical OncologyTata Memorial HospitalTata Memorial CentreMumbaiMH 400012India Medanta Institute of Hepatobiliary and Digestive Sciences MedantaThe MedicityGurgaonHaryana 122001India Medical Oncology-GI and Breast Unit Tata Memorial HospitalTata Memorial CentreMumbaiMH 400012India Department of Pathology Tata Memorial HospitalTata Memorial CentreMumbaiMH 400012India

AIM: To investigate cell type specific distribution of β-actin expression in gastric adenocarcinoma and its correlation with clinicopathological parameters.

关键词： Gastric cancer β-actin Immunohistochemistry Epithelial cells Inflammatory cells Tumor infiltrating immune cells Adjacent mucosa Resection margin

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