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Thermally stimulated properties in Znse：Tb and Znse：(Mn, Tb) phosphors

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Journal of semiconductors 2018年第2期39卷 13-16页

作者： A.K.mishra s.K.mishra s.P.Pandey Kshama Lakshmi mishra sHEAT College of Engineerig Varansi (U.P.) India Army Public school Kunraghat Gorakhpur (U.P.) India Department of Physics MM University Ambala Haryana India shree Thakurdwara Balika Vidyalaya Ghaziabad (U.P.) India

Thermoluminescence studies were performed of Znse：Tb and Znse：（Mn, Tb） phosphors. A method of preparation for Znse phosphors doped with Tb and（Mn, Tb） has been discussed. The thermoluminescence（TL）properties of these phosphors have been studied from 100 to 370 K temperature after exciting by UV radiation（365 nm）at three uniform heating rates 0.4, 0.6 and 0.9 K/s. The trapping parameters like trap depth, lifetime of electrons and capture cross-section have also been determined using various methods.

关键词： thermoluminescence electroluminescence capture cross-section ionizing radiation phosphors Curie's method

HIGHEr-OrDEr DUALITY FOr A CLAss OF NONDIFFErENTIABLE MULTIOBJECTIVE PrOGrAMMING PrOBLEMs INVOLVING GENErALIZED TYPE I AND rELATED FUNCTIONs

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Journal of systems science & Complexity 2011年第5期24卷 883-891页

作者： s. K. mishra shouyang WANG Kin Keung LAI Department of Mathematics Faculty of Science Banaras Hindu University Varanasi 221005 India Institute of systems science Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China Department of Management sciences City University of Hong Kong Tat Chee Avenue Hong Kong China

This paper extends the class of generalized type I functions introduced by Aghezzaf and Hachimi（2000） to the context of higher-order case and formulate a number of higher-order duals to a non-differentiable multi-objective programming problem and establishes higher-order duality results under the higher-order generalized type I functions introduced in the present paper, A special case that appears repeatedly in the literature is that the support function is the square root of a positive semi-definite quadratic form. This and other special cases can be readily generated from these results.

关键词： Generalized convexity higher order duality non-differentiable nonlinear programming support function.

Mechanical and dielectric behaviors of perovskite(Ba,sr)TiO_(3) borosilicate glass ceramics

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Journal of Advanced Ceramics 2014年第2期3卷 137-146页

作者： Avadhesh Kumar YADAV C.r.GAUTAM Abhinay mishra Department of Physics University of Lucknow Lucknow-226007India school of Materials science and Technology Indian Institute of TechnologyBanaras Hindu UniversityVaranasi-221005India

Perovskite(Ba,sr)TiO_(3)glass ceramics were crystallized in the presence of La_(2)O_(3)for glass ceramic system[(Ba_(1-x)sr_(x))TiO_(3)]-[2siO_(2)-B2O_(3)]-[K2O]-[La_(2)O_(3)](x=0.0 and 0.4).The formation of major crystalline phase of BaTiO_(3)along with secondary phase of Ba_(2)Tisi_(2)O_(8) was confirmed by X-ray diffraction(XrD)*** crystalline phase was clearly seen in the micrographs of(Ba,sr)TiO_(3)borosilicate glass ceramic *** prepared glass ceramic samples showed very high values of toughness and elastic *** strontium titanate(BsT)glass ceramics are used in barrier layer capacitors for storage of high energy due to their very high dielectric constant and low dielectric loss.

关键词： (Ba,sr)TiO_(3) X-ray diffraction(XrD) scanning electron microscopy(sEM) elastic modulus dielectric constant

A systematic review of progenitor survival and maturation in Parkinsonian models

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Neural regeneration research 2025年第11期20卷 3172-3178页

作者： Giulia Comini Eilís Dowd Pharmacology&Therapeutics and Galway Neuroscience Center University of GalwayGalwayIreland

stem cell-based brain repair is a promising emergent therapy for Parkinson's disease based on years of foundational research using human fetal donors as a cell *** current therapeutic options for patients,this approach has the potential to provide longterm stem cell–derived reconstruction and restoration of the dopaminergic input to denervated regions of the brain allowing for restoration of certain functions to *** ultimate clinical success of stem cell–derived brain repair will depend on both the safety and efficacy of the approach and the latter is dependent on the ability of the transplanted cells to survive and differentiate into functional dopaminergic neurons in the Parkinsonian *** the pre-clinical literature suggests that there is considerable variability in survival and differentiation between studies,the aim of this systematic review was to assess these parameters in human stem cell-derived dopaminergic progenitor transplant studies in animal models of Parkinson's disease.A defined systematic search of the PubMed database was completed to identify relevant studies published up to March *** screening,76 articles were included in the analysis from which 178 separate transplant studies were *** these,graft survival could be assessed in 52 studies and differentiation in 129 ***,we found that graft survival ranged froms transplanted,with a median of 51%of transplanted cells surviving in the brain;while dopaminergic differentiation of the cells ranged from 0% to 46% of cells transplanted with a median of 3%.This systematic review suggests that there is considerable scope for improvement in the differentiation of stem cell-derived dopaminergic progenitors to maximize the therapeutic potential of this approach for patients.

关键词： cell replacement therapy differentiation embryonic stem cells graft induced pluripotent stem cells Parkinson's disease survival transplant

solution of schrdinger Equation for Two-Dimensional Complex Quartic Potentials

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Communications in Theoretical Physics 2009年第3期51卷 397-406页

作者： ram Mehar singh Fakir Chand s.C.mishra Department of Physics Ch. Devi Lal University Department of Physics Kurukshetra University

We investigate the quasi-exact solutions of the schrodinger wave equation for two-dimensional non-hermitian complex Hamiltonian systems within the frame work of an extended complex phase space characterized by x = x1 ＋ ip3, y = x2 ＋ ip4, px= p1＋ ix3, py= p2 ＋ ix4. Explicit expressions of the energy eigenvalues and the eigenfunctions for ground and first excited states for a complex quartic potential are obtained. Eigenvalue spectra of some variants of the complex quartic potential, including PT-symmetrie one, are also worked out.

关键词： schrodinger equation complex Hamiltonian eigenvalues eigenfunctions PT-symmetry

MHD effect of mixed convection boundary-layer flow of Powell-Eyring fluid past nonlinear stretching surface

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Applied Mathematics and Mechanics(English Edition) 2014年第12期35卷 1525-1540页

作者： s.PANIGrAHI M.rEZA A.K.mishra Department of Mathematics National Institute of Science & TechnologyBerhampur 761008 India Department of Mathematics Berhampur UniversityBerhampur 760007 India

sufficient conditions are found for the existence of similar solutions of the mixed convection flow of a Powell-Eyring fluid over a nonlinear stretching permeable sur- face in the presence of magnetic field. To achieve this, one parameter linear group trans- formation is applied. The governing momentum and energy equations are transformed to nonlinear ordinary differential equations by use of a similarity transformation. These equations are solved by the homotopy analysis method （HAM） to obtain the approximate solutions. The effects of magnetic field, suction, and buoyancy on the Powell-Eyring fluid flow with heat transfer inside the boundary layer are analyzed. The effects of the non- Newtonian fluid （Powell-Eyring model） parameters ε and δon the skin friction and local heat transfer coefficients for the cases of aiding and opposite flows are investigated and discussed. It is observed that the momentum boundary layer thickness increases and the thermal boundary layer thickness decreases with the increase in ε whereas the momentum boundary layer thickness decreases and thermal boundary layer thickness increases with the increase in δ for both the aiding and opposing mixed convection flows.

关键词： stretching surface non-Newtonian fluid mixed convection

Plasma cascaded solid wastes for possible adsorption of NO_(2)in diesel exhaust

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Waste Disposal and sustainable Energy 2023年第3期5卷 383-393页

作者： Apoorva sahu shivani mishra Preeti Jain Bangalore s.rajanikanth Department of Electrical Engineering Indian Institute of ScienceBangaloreIndia Department of Electrical Engineering Jabalpur Engineering CollegeJabalpurIndia

Extensive use of fossil fuel has led to an increase in solid and gaseous particulates in the environment,which in turn necessitated newer,effective,and economical control strategies to abate pollutants,particularly gaseous *** the current research work,focus has been placed on utilizing industry wastes to adsorb nitrogen oxides present in diesel engine exhaust,which is pre-treated by *** exhaust from a 5 kW diesel generator is exposed to discharge plasma where the oxidation of nitric oxide to nitrogen dioxide occurs,which is then made to flow through another reactor filled with industry wastes drawn from agriculture,foundry,utility,marine industry,etc.,comprising mulberry waste,rice husk,wheat husk,areca nut husk,sugarcane bagasse,coffee husk,foundry sand,lignite ash,red mud,and oyster *** the adsorption of nitrogen dioxide was observed in all the wastes,reduction of nitric oxide was observed in metallic compound-based industry *** about 184 J/L,specific energy plasma cascaded industrial waste red mud yielded 98%NO_(x)removal efficiency,and that with agriculture rice husk waste yielded 53%NOx ***_(2)/Fe_(2)O_(3)present in industry wastes might have exhibited photo-catalysis in visible light resulting in the possible reduction of NO.A new pathway for recycling the waste can be expected through nitrogen dioxide adsorption,and the results are further discussed with respect to plasma-alone and cascaded plasma adsorbent systems.

关键词： Industry waste Electrical discharge Diesel exhaust Nitrogen oxide reduction Agriculture waste Plasma adsorption

Geochemistry of Late Archaean shaly BIF formed by oxic exogenic processes: an example from ramagiri schist belt,Dharwar Craton, India

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Chinese Journal Of Geochemistry 2015年第3期34卷 362-378页

作者： Meenal mishra school of sciences Indira Gandhi National Open University

The central block of the auriferous ramagiri schist belt, in the Eastern Dharwar Craton, India consists of bimodal volcanics(mafic-felsic), shaly BIF and metasedimentary rocks. Geochemical studies of the associated shaly BIF have indicated the enrichment of the major and trace elements such as si O2, Al2O3, Ti O2, K2 O, Mg O, Fe2O3(T),Zr, Y, Cr, Ni, alkali and alkaline earth elements indicates that the clastic component of the shaly BIF had their contribution from the contemporaneous bimodal *** concave chondrite normalized rEE patterns share ubiquitously anomalous positive cerium anomaly, absence of positive europium anomaly and the overall HrEE enrichment. The rEE patterns resemble those from the modern day sea water, except for positive Ce anomaly. The data suggests that arc related bimodal volcanism had been the plausible source of Fe, silica, rEE and other trace elements. The coherent behaviour of Fe, Ti, Mn and P with the rEEs indicates that they got incorporated from Fe–Ti–Mn bearing primary minerals and secondary products like clays. The variability of rEE patterns in the BIF formation samples probably results from the differences in scavenging efficiency. The BIF bears signatures of mixing of the contemporaneous clastic and chemical processes, as well as the changes accompanying diagenesis and *** precipitation of Fe did not stop during the sedimentation in an island arc related tectonic setting. The BIF strongly lacks the signatures from hydrothermal input. The presence of positive cerium anomalies and the absence of positive europium anomalies in the shaly banded ironformations imply that iron oxidation during BIF deposition took place in shallow waters rather than at depth, at oxicanoxic boundary.

关键词：地球化学二氧化硅克拉通晚太古代岩带印度力作用双峰式火山岩

PEGylation in anti-cancer therapy: An overview

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Asian Journal of Pharmaceutical sciences 2016年第3期11卷 337-348页

作者： Prajna mishra Bismita Nayak r.K.Dey Centre for Applied Chemistry Central University of Jharkhand Department of Life science National Institute of Technology

Advanced drug delivery systems using poly(ethylene glycol)(PEG) is an important development in anti-cancer therapy. PEGylation has the ability to enhance the retention time of the therapeutics like proteins, enzymes small molecular drugs, liposomes and nanoparticles by protecting them against various degrading mechanisms active inside a tissue or cell, which consequently improves their therapeutic potential. PEGylation effectively alters the pharmacokinetics(PK) of a variety of drugs and dramatically improves the pharmaceutical values;recent development of which includes fabrication of stimuli-sensitive polymers/smart polymers and polymeric micelles to cope of with the pathophysiological environment of targeted site with less toxic effects and more effectiveness. This overview discusses PEGylation involving proteins, enzymes, low molecular weight drugs, liposomes and nanoparticles that has been developed, clinically tried for anti-cancer therapy during the last decade.

关键词： PEG PEGylation Targeted drug delivery Polymers