检索结果-南通市图书馆

Electroanalytical tools to investigate the divalent state of Eu(Ⅲ) and Nd(Ⅲ) ions in non-aqueous medium

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2012年第4期30卷 392-396页

作者： Jignasu P mehta Himanshu m.pandya Kahan I pandya Department of Chemistry DST-FIST sponsored Department Mahatma Gandhi Campus Bhavnagar University

The divalent state of Ln（III） ions has attracted much interest because of their ability to serve isomorphously in many biological system of divalent Ca（II） ion. Therefore, present paper deals with the study of divalent state of Eu（III） and Nd（III） ions in non-aqueous medium. In present study, cyclic voltammetry and chronopotentiometry were utilized to establish the divalent state of Eu（III） and Nd（III） ions. The cyclic voltammetric technique showed two-step reduction process at cathode for both Ln（III） ions under specified experimental conditions and chronopotentiometric method also showed two different transition times （r）. Looking to the shape of cyclic voltammogram we calculated het- erogeneous forward rate constant （K^fh, cm/s） and diffusion coefficient （D, cm2/s） for both ions, which suggested that sweep rate had great ef- fect on the shape of cyclic voltammogram of Eu（III） and Nd（III） ions. The result of chronopotentiometry also suggested that stable divalent states of Eu（III） and Nd（III） ions existed with chronopotentiogram with two distinct transition times. The diffusion coefficients （D, cm2/s） were calculated from Sand equation. The diffusion coefficients of both techniques were compared and the results suggested that the system at electrode surface was changing from being reversible to irreversible.

关键词： Eu(IlI) and Nd(III) ions non-aqueous medium cyclic-voltammetry chronopotentiomentry rare earths

Integration of evacuated solar collectors with an adsorptive ice maker for hot climate region

在线全文

学校读者我要写书评

暂无评论

Energy and Built Environment 2022年第2期3卷 181-189页

作者： Nishant modi Bhargav pandya College of Sciences and Engineering University of TasmaniaTasmaniaAustralia School of Chemical Engineering University of BirminghamBirminghamUnited Kingdom

This research study compares the steady-state and dynamic behaviour of a solar-powered activated carbon-35(AC35)/methanol-based vapour adsorption refrigeration system for production of ice at hot climate ***-modynamic comparisons are made with the coefficient of performance(COP),system COP(SCOP),specific refrig-eration capacity(SRC)and critical parameters such as cycle time and ice production rate are ***,the sustainability of the proposed ice maker has proven by integrating economic and environmental *** minimum solar flux required to ensure continuous ice production was found 800 W/m^(2).moreover,the max-imum ice production rate and COP were decreased by 32.36%and 37.63%respectively when the system was operated under real ambient *** proposed solar adsorptive ice maker achieved maximum SRC of 61.6 g m^(−2)during April month and reduced the CO_(2)emissions by 12.82 ton annually.

关键词： Solar cooling system Adsorption refrigeration cycle Ice production rate Activated carbon-35(AC35)/methanol GHG emissions Simple payback period

Extending the resolution limits of nanoshape imprint lithography using molecular dynamics of polymer crosslinking

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

microsystems & Nanoengineering 2021年第1期7卷 141-150页

作者： Anshuman Cherala Parth N.pandya Kenneth m.Liechti S.V.Sreenivasan NASCENT Engineering Research Center The University of Texas at AustinAustinTXUSA

Emerging nanoscale applications in energy,electronics,optics,and medicine can exhibit enhanced performance by incorporating nanoshaped structures(nanoshape structures here are defined as shapes enabled by sharp corners with radius of curvaturem).Nanoshaped fabrication at high-throughput is well beyond the capabilities of advanced optical *** the highest-resolution e-beams and large-area e-beams have a resolution limit of 5 and 18 nm half-pitch lines or 20 nm half-pitch holes,respectively,their low throughput necessitates finding other fabrication *** using nanoimprint lithography followed by metal-assisted chemical etching,diamond-like nanoshapes with~3 nm radius corners and 100 nm half-pitch over large areas have been previously demonstrated to improve the nanowire capacitor performance(by~90%).In future dynamic random-access memory(DRAm)nodes(with DRAm being an exemplar CmOS application),the implementation of nanowire capacitors scaled tom halfpitch is *** scale nanoshape imprint lithography down to these half-pitch values,the previously established atomistic simulation framework indicates that the current imprint resist materials are unable to retain the nanoshape structures needed for DRAm *** this study,the previous simulation framework is extended to study improved shape retention by varying the resist formulations and by introducing novel bridge structures in nanoshape *** simulation study has demonstrated viable approaches to sub-10 nm nanoshaped imprinting with good shape retention,which are matched by experimental data.

关键词： lithography shaped corners

Simultaneous enantioseparation and simulation studies of atenolol,metoprolol and propranolol on Chiralpak^■IG column using supercritical fluid chromatography

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Pharmaceutical Analysis 2021年第6期11卷 746-756页

作者： Pranav A.pandya Priyanka A.Shah Pranav S.Shrivastav Department of Chemistry School of SciencesGujarat UniversityAhmedabad380009India

Enantioseparation of threeβ-blockers,i.e.,atenolol,metoprolol and propranolol,was studied on amylose tris(3-chloro-5-methylphenylcarbamate)immobilized chiral stationary phase using supercritical fluid chromatography(SFC).The effect of organic modifiers(methanol,isopropanol and their mixture),column temperature and back pressure on chiral separation ofβ-blockers was *** chromatographic separation with respect to resolution,retention,and analysis time was achieved using a mixture of CO_(2) and 0.1%isopropyl amine in isopropanol:methanol(50:50,V/V),in 75:25(V/V)*** the optimized conditions,the resolution factors(Rs)and separation factors(a)were greater than3.0 and 1.5,***,with increase in temperature(25-45℃)and pressure(100-150 bars)there was corresponding decrease in retention factors(k),a and ***,a reverse trend(a and Rs)was observed for atenolol with increase in *** thermodynamic data from van’t Hoff plots revealed that the enantioseparation was enthalpy driven for metoprolol and propranolol while entropy driven for *** understand the mechanism of chiral recognition and the elution behavior of the enantiomers,molecular docking studies were *** binding energies obtained from simulation studies were in good agreement with the elution order found experimentally and also with the free energy *** method was validated in the concentration range of 0.5-10μg/m L for all the *** limit of detection and limit of quantitation ranged from 0.126 to 0.137μg/m L and 0.376-0.414μg/m L,*** method was used successfully to analyze these drugs in pharmaceutical preparations.

关键词： Enantioseparation Supercritical fluid chromatography β-blockers Chiralpak^(■)IG column molecular docking Binding energy

molecular mechanisms underlying SARS-CoV-2 hepatotropism and liver damage

在线全文

学校读者我要写书评

暂无评论

World Journal of Hepatology 2024年第1期16卷 1-11页

作者： Jorge Quarleri m Victoria Delpino Instituto de Investigaciones Biomédicas en Retrovirus y Sida(INBIRS) Universidad de Buenos Aires(UBA)Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET)Buenos Aires 1121Argentina

In coronavirus disease 2019(COVID-19),severe acute respiratory syndrome coronavirus-2(SARS-CoV-2)primarily targets the respiratory system,but evidence suggests extrapulmonary organ involvement,notably in the *** RNA has been detected in hepatic tissues,and in situ hybridization revealed virions in blood vessels and endothelial *** microscopy confirmed viral particles in hepatocytes,emphasizing the need for understanding hepatotropism and direct cytopathic effects in COVID-19-related liver *** factors contribute to liver injury,including direct cytotoxicity,vascular changes,inflammatory responses,immune reactions from COVID-19 and vaccinations,and druginduced liver *** a typical hepatitis presentation is not widely documented,elevated liver biochemical markers are common in hospitalized COVID-19 patients,primarily showing a hepatocellular pattern of ***-term studies suggest progressive cholestasis may affect 20%of patients with chronic liver disease post-SARS-CoV-2 *** molecular mechanisms underlying SARS-CoV-2 infection in the liver and the resulting liver damage are ***“Editorial”highlights the expression of the Angiotensin-converting enzyme-2 receptor in liver cells,the role of inflammatory responses,the impact of hypoxia,the involvement of the liver's vascular system,the infection of bile duct epithelial cells,the activation of hepatic stellate cells,and the contribution of monocyte-derived *** also mentions that pre-existing liver conditions can worsen the outcomes of *** the interaction of SARS-CoV-2 with the liver is still evolving,and further research is required.

关键词： SARS-CoV-2 COVID-19 Hepatotropism Angiotensin-converting enzyme-2

Oldest Asian Record of Snapping Shrimps(malacostraca:Alpheidae)from the Kutch Basin,Western India and Associated Biota:Biostratigraphic,Paleoenvironmental and Paleoecological Significance

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2022年第6期96卷 1867-1883页

作者： Vivesh V.KAPUR Kamlesh KUmAR Pranav J.pandya Amit KGHOSH Arindam CHAKRABORTY Anupam SHARmA Gaurav CHAUHAN m.G.THAKKAR Birbal Sahni Institute of Palaeosciences 53University RoadLucknow 226007India Department of Biology Shri R.R.Lalan CollegeBhujKachchh DistrictGujaratIndia Institute of Earth Sciences Academia SinicaTaipeiTaiwan 11529China Department of Earth and Environmental Science K.S.K.V.Kachchh UniversityBhujKachchh DistrictGujaratIndia

The oldest Asian record of alpheid shrimps,assigned to genus Alpheus,based on snapping claw fingertips from the miocene Khari Nadi Formation in the Kutch Basin,western India reported herein,extends the fossil record of the family Alpheidae from Asia by~22 million *** early miocene(Aquitanian)age is estimated based on the associated assemblage of calcareous nannofossils,Sphenolithus disbelemnos,Cyclicargolithus floridanus,and Reticulofenestra *** co-occurring microbiota includes bony fish otolith remains,identified as“genus Gobiidarum”,isolated teeth of Dasyatis rays,Sphyrna sharks,and teleosts,ctenoid and placoid scales,ostracods,belonging to the genera Paractinocythereis,Alocopocythere,Ruggieria,Aglaiocypris,Bairdoppilata,and echinoid *** together,the microfossil assemblage and data from chemical analyses using Energy Dispersive Spectroscopy,X-Ray Diffraction and Wavelength Dispersive X-Ray Fluorescence of host and associated lithologies suggests prevalence of a shallow(neritic)to coastal marine(intertidal)depositional *** present investigation also provides the oldest fossil evidence on the co-occurrence of Alpheus and gobiids(based on otoliths)that strongly advocates that the mutualistic association between these animal groups had developed by the Aquitanian.

关键词： biostratigraphy Crustacea Caridea Elasmobranchs Gobiidae invertebrate and vertebrate paleontology nannofossils Oligocene-miocene Indian subcontinent

Exclusive semileptonic decays of D and Ds mesons in the covariant confining quark model

在线全文

学校读者我要写书评

暂无评论

Frontiers of physics 2019年第6期14卷 103-132页

作者： m.A.Ivanov J.G.Korner J.N.pandya P.Santorelli N.R.Soni C.T.Tran Bogoliubov Laboratory of Theoretical Physics Joint Institute for Nuclear Research141980 DubnaRussia PRISmA Cluster of Excellence Institut für PhysikJohannes Gutenberg-UniversitatD-55099 MainzGermany Applied Physics Department Faculty of Technology and EngineeringThe Maharaja Sayajirao University of BarodaVadodara 390001GujaratIndia Dipartimento di Fisica"E.Pancini" Universitàdi Napoli FedericoⅡComplesso Universitario di Monte S.AngeloVia CintiaEdificio 680126 NapoliItaly Istituto Nazionale di Fisica Nucleare Sezione di Napoli80126 NapoliItaly

Recently,the BESⅢcollaboration has reported numerous measurements of various D(s)meson semileptonic decays with significantly improved *** with similar studies carried out at BABAR,Belle,and CLEO,new windows to a better understanding of weak and strong interactions in the charm sector have been *** light of new experimental data,we review the theoretical description and predictions for the semileptonic decays of D(s)to a pseudoscalar or a vector *** review is essentially an extended discussion of our recently published results obtained in the framework of the covariant confining quark model.

关键词： covariant quark model semileptonic decay charmed meson form factor angular distribution

Decay rates and electromagnetic transitions of heavy quarkonia

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics C 2015年第12期39卷 19-24页

作者： J.N.pandya N.R.Soni N.Devlani A.K.Rai Applied Physics Department Faculty of Technology & Engineeringthe M S University of Baroda Applied Physics Department Polytechnicthe M S University of Baroda Department of Applied Physics Sardar Vallabhbhai National Institute of Technology

The electromagnetic radiative transition widths for heavy quarkonia, as well as digamma and digluon decay widths, are computed in the framework of the extended harmonic confinement model （ERHm） and Coulomb plus power potential （CPP,） with varying potential index v. The outcome is compared with the values obtained from other theoretical models and experimental results. While the mass spectra, digamma and digluon widths from ERHm as well as CPP v=1 are in good agreement with experimental data, the electromagnetic transition widths span over a wide range for the potential models considered here making it difficult to prefer a particular model over the others because of the lack of experimental data for most transition widths.

关键词： heavy quarkonia radiative decays electromagnetic transitions

Integrated Single-cell multiomic Analysis of HIV Latency Reversal Reveals Novel Regulators of viral Reactivation

在线全文

学校读者我要写书评

暂无评论

Genomics, Proteomics & Bioinformatics 2024年第1期22卷 67-88页

作者： manickam Ashokkumar Wenwen mei Jackson J.Peterson Yuriko Harigaya David m.murdoch David m.margolis Caleb Kornfein Alex Oesterling Zhicheng Guo Cynthia D.Rudin Yuchao Jiang Edward P.Browne Department of medicine University of North Carolina at Chapel HillChapel HillNC 27599USA HIV Cure Center University of North Carolina at Chapel HillChapel HillNC 27599USA Department of Biostatistics University of North Carolina at Chapel HillChapel HillNC 27599USA Department of microbiology and Immunology University of North Carolina at Chapel HillChapel HillNC 27599USA Department of Genetics University of North Carolina at Chapel HillChapel HillNC 27599USA Department of medicine Duke UniversityDurhamNC 27708USA Department of Computer Science Duke UniversityDurhamNC 27708USA Department of Statistics Texas A&M UniversityCollege StationTX 77843USA Department of Biology Texas A&M UniversityCollege StationTX 77843USA Department of Biomedical Engineering Texas A&M UniversityCollege StationTX 77843USA

Despite the success of antiretroviral therapy,human immunodeficiency virus(HIV)cannot be cured because of a reservoir of latently infected cells that evades *** understand the mechanisms of HIV latency,we employed an integrated single-cell RNA sequencing(scRNA-seq)and single-cell assay for transposase-accessible chromatin with sequencing(scATAC-seq)approach to simultaneously profile the transcriptomic and epigenomic characteristics of~125,000 latently infected primary CD4^(+)T cells after reactivation using three different latency reversing *** expressed genes and differentially accessible motifs were used to examine transcriptional pathways and transcription factor(TF)activities across the cell *** identified cellular transcripts and TFs whose expression/activity was correlated with viral reactivation and demonstrated that a machine learning model trained on these data was 75%-79%accurate at predicting viral ***,we validated the role of two candidate HIV-regulating factors,FOXP1 and GATA3,in viral *** data demonstrate the power of integrated multimodal single-cell analysis to uncover novel relationships between host cell factors and HIV latency.

关键词： HIV latency reversal Primary CD4þT cell Single-cell multiomics HIV-regulating factor machine learning