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Hydr.m.gnetic thin film.flow of Casson fluid in non-Dar.y por.us m.dium.with Joule dissipation and Navier.s par.ial slip

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Applied m.them.tics and m.chanics(English Edition) 2017年第11期38卷 1613-1626页

作者： G.S.SETH r.tripathi m.K.m.SHr. Depar.m.nt of Applied m.them.tics Indian Institute of Technology (India School of Mines) Dhanbad 826004 India

In this paper. the effects of viscous and Ohm.c heating and heat gener.- tion/absor.tion on m.gnetohydr.dynam.c flow of an electr.cally conducting Casson thin film.fluid over.an unsteady hor.zontal str.tching sheet in a non-Dar.y por.us m.dium.ar. investigated. The fluid is assum.d to slip along the boundar. of the sheet. Sim.lar. ity tr.nsfor.ation is used to tr.nslate the gover.ing par.ial differ.ntial equations into or.inar. differ.ntial equations. A shooting technique in conjunction with the 4th or.er.r.nge-Kutta m.thod is used to solve the tr.nsfor.ed equations. Com.utations ar. car. r.ed out for.velocity and tem.er.tur. of the fluid thin film.along with local skin fr.ction coefficient and local Nusselt num.er.for.a r.nge of values of per.inent flow par.m.ter.. It is obser.ed that the Casson par.m.ter.has the ability to enhance fr.e sur.ace velocity and film.thickness, wher.as the For.hheim.r.par.m.ter. which, is r.sponsible for.the iner.ial dr.g has an adver.e effect on the fluid velocity inside the film. The velocity slip along the boundar. tends to decr.ase the fluid velocity. This investigation has var.ous applications in engineer.ng and in pr.ctical pr.blem. such as ver. lar.e scale integr.tion （VLSI） of electr.nic chips and film.coating.

关键词： fluid thin film non-Dar.y m.dium velocity slip unsteady str.tching sheet,Joule dissipation heat gener.tion/absor.tion

Nanom.ter.al Based Biosensor. for.Detection of Vir.ses Including SAr.-CoV-2:A r.view

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Jour.al of Analysis and Testing 2021年第4期5卷 327-340页

作者： Ayushi Bisht Abhishek m.shr. Har.nder.Bisht r.m.tripathi Am.ty Institute of Biotechnology Amity UniversityNoida 201303India Am.ty Institute of Nanotechnology Amity UniversityNoida 201303India r.liance Industr.es Lim.ted MotikhavdiJamnagar 361140India

The COVID-19 outbr.ak led to an uncontr.llable situation and was later.declar.d a global ***-PCr.is one of the r.liable m.thods for.the detection of COVID-19,but it r.quir.s tr.nspor.ing sam.les to sophisticated labor.tor.es and takes a significant am.unt of tim. to am.lify the vir.l ***,ther. is an ur.ent need for.a lar.e-scale,r.pid,specific,and por.able detection *** nanom.ter.als-based detection technology has been developed and it showed advancem.nt over.the conventional m.thods in selectivity and *** r.view aim. at sum.ar.sing som. of the m.st pr.m.sing nanom.ter.al-based sensing technologies for.detecting *** possess unique physical,chem.cal,electr.cal and optical pr.per.ies,which can be exploited for.the application in ***,nanom.ter.als wor. on the sam. scale as biological pr.cesses and can be easily functionalized with substr.tes of *** devices do not r.quir. extr.or.inar. sophistication and ar. suitable for.use by com.on individuals without high-tech *** and color.m.tr.c m.thods sim.lar.to glucom.ter.and pr.gnancy test kits ar. discussed and r.viewed as potential diagnostic devices for.*** devices wor.ing on the pr.nciple of im.une r.sponse and m.cr.ar.ays ar. also discussed as possible *** such as m.tal nanopar.icles,gr.phene,quantum.dots,and CNTs enhance the lim.t of detection and accur.cy of the biosensor. to give spontaneous *** challenges of industr.al-scale pr.duction of these devices ar. also *** m.ss pr.duction is successfully developed,these sensor. can r.m. up the testing to pr.vide the accur.te num.er.of people aff ected by the vir.s,which is extr.m.ly cr.tical in today’s scenar.o.

关键词： SAr.-CoV-2 Electr.chem.cal sensor. Nanom.ter.als Color.m.tr.c detection m.cr.ar.ay-based sensor. Im.edim.tr.c biosensor.

A novel appr.ach towar.s m.lecular.m.m.r. device in gate tunable str.ctur. of m.S_(2)-gr.phene

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Nano r.sear.h 2021年第1期14卷 177-184页

作者： r.hul tripathi Abha m.sr. Depar.m.nt of Instr.m.ntation and Applied Physics Indian Institute of Sciencey BangaloreKarnataka 560012India

m.lecular.inter.ction in two-dim.nsional(2D)van der.Waals(vdW)inter.aces has dr.wn tr.m.ndous attention for.extr.or.inar. m.ter.als *** sensing char.cter.stics of m.lecular.inter.ction has been exploited extensively to r.ach the detection lim.t to a few par.s-per.billion(ppb)of m.lecules and far.less attention is given to the evolution of per.istent cur.ent state due to the m.lecular.*** study focuses on m.lecular.m.m.r. oper.tion of m.S_(2)-gr.phene heter.str.ctur. based field effect *** r.sistance state of the device due to the exter.al per.ur.ation of m.lecules is tuned to get a near.y r.laxation fr.e cur.ent state at m.ch lower.m.lecular.concentr.tion of 10 ppb tofacilitate non-volatile m.m.r. featur.s for.m.lecular.m.m.r. *** ultr.fast switching oper.tion in m.lli-second or.er.is achieved at r.om.tem.er.tur. for.the fastest r.cover. obtained sofar.in any m.lecular.*** pr.cess is co-contr.lled both by m.lecular.as well as exter.al char.e density.

关键词： m.S_(2) gr.phene field effect tr.nsistor m.lecular.m.m.r. tr.p char.es

Pr.spects for.3D biopr.nting of or.anoids

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Bio-Design and m.nufactur.ng 2021年第3期4卷 627-640页

作者： Pr.ety r.wal Dinesh m.tripathi Seer.m.r.m.kr.shna Savneet Kaur Depar.m.nt of m.lecular.and Cellular.m.dicine Institute of Liver and Biliary Sciences(ILBS)D1Vasant KunjNew Delhi 110070India School of Biotechnology Gautam Buddha UniversityGreater NoidaIndia Depar.m.nt of m.chanical Engineer.ng National University of SingaporeSingaporeSingapore

Thr.e-dim.nsional(3D)or.anoids der.ved fr.m.plur.potent or.adult tissue stem.cells seem.to possess excellent potential for.studying developm.nt and disease m.chanism. alongside having a m.r.ad of applications in r.gener.tive ***,lack of pr.cise ar.hitectur.s and lar.e-scale tissue sizes ar. som. of the key lim.tations of cur.ent or.anoid technologies.3D biopr.nting of or.anoids has r.cently em.r.ed to addr.ss som. of these *** this r.view,we discuss 3D biopr.nting with r.spect to the use of bioinks and biopr.nting m.thods and highlight r.cent studies that have shown success in biopr.nting of stem.cells and *** also sum.ar.ze the use of sever.l vascular.zation str.tegies for.the biopr.nted or.anoids,that ar. cr.tical for.a com.lex tissue *** fully r.alize the tr.nslational applications of or.anoids in disease m.deling and r.gener.tive m.dicine,these ar.as in 3D biopr.nting need to be appr.pr.ately har.essed and channelized.

关键词： Thr.e-dim.nsional biopr.nting Bioink Or.anoid m.cr.fluidics Extr.cellular.m.tr.x(ECm. Biom.ter.al

A high-capacity viologen-based anolyte for.high ener.y density neutr.l pH aqueous r.dox-flow batter.es

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Jour.al of Ener.y Chem.str. 2023年第3期78卷 222-231,I0007页

作者： Anubhav Kum.r.Bijay P.tripathi Depar.m.nt of m.ter.als Science and Engineer.ng Indian Institute of Technology DelhiHauz KhasNew Delhi 110016India

r.dox-ﬂow batter.es(r.Bs)ar. a pr.m.sing ener.y stor.ge technology with r.m.r.able scalability and safety for.stor.ng vast am.unts of r.newable ener.y and m.tigating outputﬂuctuations of r.newable power.*** dem.nstr.te a neutr.l pH aqueous r.B using a custom.designed 1’,1’’’,1’’’’’-(benzene-1,3,5-tr.yltr.s(m.thylene))tr.s(1-(3-(tr.m.thyl am.onio)pr.pyl)-[4’’,4’’’-bipyr.dine]-1,1’-diium.nonachlor.de(BTTm.B)as a 3 e-stor.ge *** custom.design with the high polar.zation in char.e density has led to the excellent water.solubility of 4.0 m.in H_(2)O(321.6 A h L^(-1))and 2.4 m.in 2.0 m.NaCl(192.9 A h L^(-1)).The density functional theor.(DFT)calculations and electr.chem.cal exper.m.nts have shown 3 e-stor.ge r.sponse of BTTm.B with a diffusion coefﬁcient of 3.1×10^(-6)cm.(2) s^(-1)and r.te con-stant of 1.6×10^(-2)cm.s^(-1) for.theﬁr.t r.duction *** synthesized anolyte was pair.d with(Fer.ocenylm.thyl)tr.m.thylam.onium.chlor.de(FcNCl)as catholyte enabling a 0.92 V aqueous r.B with 125.9 W h L^(-1)theor.tical ener.y *** aqueous r.B has an excellent cycling per.or.ance fr.m.10-30 m.A cm.(-2),ener.y efﬁciency up to 80%,capacity r.tention of 99.96%per.cycle at 20 m.A cm.(-2),and a high dem.nstr.ted ener.y density of 29.1 W h L^(-1).

关键词： Ener.y stor.ge Aqueous r.dox-ﬂow batter. r.dox-active or.anic m.ter.al Viologen der.vative Solvation ener.y

Stokes flow of m.cr.-polar.fluids by per.staltic pum.ing thr.ugh tube with slip boundar. condition

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Applied m.them.tics and m.chanics(English Edition) 2011年第12期32卷 1587-1598页

作者： D.tripathi m.K.CHAUBE P.K.GUPTA Depar.m.nt of m.them.tics Indian Institute of Technology Ropar Punjab 140001 India Depar.m.nt of m.them.tics Raj Kumar Goel Institute of Technology Ghaziabad 201001 India Depar.m.nt of Applied m.them.tics Institute of Technology Banaras Hindu University Varanasi 221005 India

This paper.studies the Stokes flow of m.cr.-polar.fluids by per.staltic pum.ing thr.ugh the cylindr.cal tube under.the effect of the slip boundar. condition. The m.tion of the wall is gover.ed by the sinusoidal wave equation. The analytical and num.r.cal solutions for.the axial velocity, the m.cr.-polar.vector. the str.am.function, the pr.ssur. gr.dient, the fr.ction for.e, and the m.chanical efficiency ar. obtained by using the lu- br.cation theor. under.the low r.ynolds num.er.and long wavelength appr.xim.tions. The im.acts of the em.r.ing par.m.ter., such as the coupling num.er. the m.cr.-polar.par.m.ter. the slip par.m.ter.on pum.ing char.cter.stics, the fr.ction for.e, the velocity pr.file, the m.chanical efficiency, and the tr.pping phenom.non ar. depicted gr.phically. The num.r.cal r.sults infer.that lar.e pr.ssur. is r.quir.d for.per.staltic pum.ing when the coupling num.er.is lar.e, while opposite behavior. ar. found for.the m.cr.-polar.par.m.ter.and the slip par.m.ter. The size of the tr.pped bolus r.duces with the incr.ase in the coupling num.er.and the m.cr.-polar.par.m.ter. wher.as it blows up with the incr.ase in the slip par.m.ter.

关键词： Stokes flow slip boundar. condition m.chanical efficiency m.cr.-polar.luid per.staltic pum.ing tr.pping

A r.view on m.dicinal im.or.ance,phar.acological activity and bioanalytical aspects of beta-car.oline alkaloid "Har.ine"

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Asian Pacific Jour.al of Tr.pical Biom.dicine 2012年第8期2卷 660-664页

作者： K Patel m.Gadewar.r.tripathi SK Pr.sad Dinesh Kum.r.Patel G.L.A Institute of Phar.aceutical r.sear.h S.K.I.P.S Depar.m.nt of Phar.aceutics Institute of TechnologyBanaras Hindu University

Har.ine,a beta-car.oline alkaloid,is widely distr.buted in the plants,m.r.ne cr.atur.s,insects, m.m.alians as well as in hum.n tissues and body *** was or.ginally isolated fr.m.seeds of Peganum.har.al in 1847 having a cor. indole str.ctur. and a pyr.dine *** has var.ous types of phar.acological activities such as antim.cr.bial,antifungal,antitum.r.cytotoxic, antiplasm.dial,antioxidaant,antim.tagenic,antigenotoxic and hallucinogenic *** acts on gam.a-am.nobutyr.c acid type A and m.noam.ne oxidase A or.B r.ceptor.enhances insulin sensitivity and also pr.duces vasor.laxant *** pr.vents bone loss by suppr.ssing *** cur.ent r.view gives an over.iew on phar.acological activity and analytical techniques of har.ine,which m.y be useful for.r.sear.her.s to explor. the hidden potential of har.ine and and will also help in developing new dr.gs for.the tr.atm.nt of var.ous diseases.

关键词： Har.ine Alkaloid Phar.acological activity Analytical technique Peganum har.ala

Effects of of Habitats and Pesticides on Aer.bic Capacity and Sur.ival of Soil Fauna

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Biom.dical and Envir.nm.ntal Sciences 2005年第3期18卷 169-175页

作者： G. tripathi B. m. SHAr.A Depar.m.nt of Zoology J. N. Vyas University Jodhpur-342 001 IndiaDepartment of Zoology J. N. Vyas University Jodhpur-342 001 India

Objective Faunal health is lar.ely dependent on their.soil envir.nm.nt and available litter.quality. So the effects of differ.nt soil habitats and pesticides on citr.te synthase (CS) activity of soil fauna and its population wer. studied. m.thods The soil anim.ls wer. collected fr.m.differ.nt pedoecosystem. for.habitat study. Wher.as Vigna r.diata based system.was selected for.pesticidal obser.ations. The field was divided into five equal plots for.contr.l and tr.atm.nt of γ-BHC, quinalphos, car.ar.l and cyper.ethr.n. Soil fauna was collected by quadr.t m.thod and extr.cted by Tullgr.n funnel. Individuals of a species having sim.lar.sizes wer. collected for.the estim.tion of CS activity. They wer. hom.genized and fr.ctions wer. obtained by differ.ntial centr.fugation. The activity of CS was assayed spectr.photom.tr.cally. r.sults Citr.te synthase (CS) activity of beetle (r.sphytus fr.gi), woodlouse (Por.ellio laevis) and centipede (Scolopendr. m.r.itans) var.ed significantly with r.spect to changes in differ.nt soil habitats. Though the CS activity of r. fr.gi, P. laevis, and S. m.r.itans differ.d am.ng them.elves but the highest activity of CS in these anim.ls was in V. r.diata and lowest in A. nilotica based pedoecosystem. The aer.bic capacity of centipede was m.xim.m.followed by woodlouse and beetle. The tr.atm.nt of γ-BHC, quinalphos, car.ar.l and cyper.ethr.n significantly r.duced the CS activity of these anim.ls. γ-BHC showed m.xim.m.r.duction in CS activity indicating highly toxic effect of or.anochlor.ne on aer.bic m.tabolism.of soil fauna. However. m.nim.m.r.duction was obser.ed in r.sponse to car.ar.l (in beetle) or.cyper.ethr.n (in woodlouse/centipede) leading to im.air.ent of aer.bic capacity. The differ.nces in pesticide effects m.ght be assigned to the differ.nces in chem.cal natur. of pesticides and their.inter.ctions with below-gr.und fauna. Tr.atm.nt of γ-BHC and quinalphos r.duced the population of Acar., Coleopter., Collem.ola, other.ar.hr.pods as

关键词： Citr.te synthase Habitat Pesticide Soil fauna and deser.

Fauna-associated Changes in Chem.cal and Biochem.cal Pr.per.ies of Soil

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Biom.dical and Envir.nm.ntal Sciences 2006年第6期19卷 422-426页

作者： G. tripathi B. m. SHAr.A Depar.m.nt of Zoology J. N. V. UniversityJodhpur-342 001India

Objective To study the im.acts of abundance of woodlice, ter.ites, and m.tes on som. functional aspects of soil in or.er.to elucidate the specific r.le of soil fauna in im.r.ving soil fer.ility in deser.. m.thods Fauna-r.ch sites wer. selected as exper.m.ntal sites and adjacent ar.as wer. taken as contr.l, Soil sam.les wer. collected fr.m.both sites. Soil r.spir.tion was m.asur.d at both sites. The soil sam.les wer. sent to labor.tor., their.chem.cal and biochem.cal pr.per.ies wer. analyzed. r.sults Woodlice showed 25% decr.ase in or.anic car.on and or.anic m.tter.as com.ar.d to contr.l site. Wher.as ter.ites and m.tes showed 58% and 16% decr.ase in or.anic car.on and or.anic m.tter. In contr.st, available nitr.gen （nitr.te and am.onical both） and phosphor.s exhibited 2-fold and 1.2-fold incr.ase, r.spectively. Soil r.spir.tion and dehydr.genase activity at the sites r.ch in woodlice, ter.ites and m.tes pr.duced 2.5-, 3.5- and 2-fold incr.ases, r.spectively as com.ar.d to their.contr.l values. Fauna-associated incr.ase in these biological par.m.ter. clear.y r.flected fauna-induced m.cr.bial activity in soil. m.xim.m.decr.ase in or.anic car.on and incr.ase in nitr.te-nitr.gen and am.onical-nitr.gen, available phosphor.s, soil r.spir.tion and dehydr.genase activity wer. pr.duced by ter.ites and m.nim.m.by m.tes r.flecting ter.ite as an efficient soil im.r.ver.in deser. envir.nm.nt. Conclusion The soil fauna-associated changes in chem.cal （or.anic car.on, nitr.te-nitr.gen, am.onical-nitr.gen, phosphor.s） and biochem.cal （soil r.spir.tion, dehydr.genase activity） pr.per.ies of soil im.r.ve soil health and help in conser.ation of deser. pedoecosystem.

关键词： Soil fauna Or.anic car.on Nitr.gen Phosphor.s Soil r.spir.tion Dehydr.genase activity