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Influence of Selenium on Gr.wth, Antioxidants Pr.duction and Physiological Par.meter. of r.ce (<i>Or.za sativa</i>L.) Seedlings and Its Possible r.ver.al by Coapplication of Sulphate

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Amer.can Jour.al of Plant Sciences 2019年第12期10卷 2236-2278页

作者： Debar.ti das Paulin Seal Asok K. biswas Plant Physiology and Biochemistr. Labor.tor. Centre of Advanced Study Department of Botany University of Calcutta Kolkata India

The effect of selenate (Na2SeO4) and sulphate (Na2SO4) was studied on gr.wth and metabolism in two r.ce cultivar. cv. satabdi and cv. khitish. Selenate at low concentr.tion (2 μM) expr.ssed gr.wth pr.moting effect on r.ce seedlings as opposed to its high concentr.tion (≥20 μM) wher. the test seedlings showed stunted gr.wth with br.wning at the apices of both r.ots and shoots. The chlor.phyll contents showed a dose dependent effect. Both chlor.phyll a and chlor.phyll b contents wer. inhibited with incr.ase in selenate concentr.tions. The effect was mor. pr.nounced in cv. satabdi compar.d to cv. *** level of accessor. pigments was defer.ntially affected by selenium tr.atment. Simultaneously, the fluor.scence intensity and Hill activity decr.ased with incr.ase in selenate concentr.tions in the test seedlings. It is assumed that selenium plays a pr.tective r.le in plants subjected to str.ss and pr.vents the for.ation of r.active oxygen species (r.S) in the cells. Higher.selenate concentr.tions (≥20 μM) exer.ed var.able effect on the activities of enzymatic antioxidants viz.;super.xide dismutase (SOD), catechol per.xidase (CPX) and catalase (CAT) in the test seedlings. The activity of SOD incr.ased with incr.ase in selenate concentr.tions, wher.as activities of CAT and CPX decr.ased. Under.high selenate concentr.tions, the levels of oxidative str.ss mar.er., viz.;pr.line, H2O2 and MDA wer. also enhanced. Selenium induced accumulation of total soluble sugar.and incr.ased the level of both r.ducing and non r.ducing sugar. in both the test cultivar.. The star.h contents concomitantly decr.ased with r.se in selenate concentr.tions. Mor.over. the nutr.ent contents of test seedlings wer. significantly influenced by selenium. The Na and K levels gr.dually incr.ased wher.as Ca, Mg and Fe levels decr.ased on application of selenate. Joint application of 10 mM sulphate and selenate showed significant alter.tions on all par.meter. tested with r.spect to selenate tr.atment a

关键词： r.ce Selenate Sulphate Gr.wth Biochemical Changes

Effect of eccentr.c and inclined loading on the bear.ng capacity of str.p footing placed on r.ck mass

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Jour.al of Mountain Science 2024年第1期21卷 292-312页

作者： Shuvankar.das Debar.hya CHAKr.BOr.Y Depar.ment of Civil Engineer.ng Indian Institute of Technology KharagpurWest Bengal-721302India

This paper.deals with the bear.ng capacity deter.ination of str.p footing on a r.ck mass in hilly ar.a by consider.ng the influence of inclined and eccentr.c loading. Applying the gener.lized HoekBr.wn failur. cr.ter.on, the failur. behavior.of the r.ck mass is modeled with the help of the power.cone pr.gr.mming in the lower.bound finite element limit analysis fr.mewor.. Using bear.ng capacity factor.Ns), the change in bear.ng capacity of the str.p footing due to the occur.ence of eccentr.cally inclined loading is pr.sented. The var.ations of the magnitude of Ns ar. obtained by examining the effects of the Hoek-Br.wn r.ck mass str.ngth par.meter.(uniaxial compr.ssive str.ngth(sci), distur.ance factor.D), r.ck par.meter.mi), and Geological Str.ngth Index(GSI)) in the pr.sence of differ.nt magnitudes of eccentr.city(e) and inclination angle(λ) with r.spect to the ver.ical plane, and pr.sented as design char.s. Both the inclined loading modes, i.e., inclination towar.s the center.of str.p footing(+λ) and inclination away fr.m the center.of str.p footing(-λ), ar. adopted to per.or. the investigation. In addition, the cor.elation between the input par.meter. and the cor.esponding output is developed by utilizing the ar.ificial neur.l networ.(ANN). Additionally, fr.m sensitivity analysis, it is obser.ed that inclination angle(λ) is the most sensitive par.meter. For.pr.cticing engineer., the obtained design equation and design char.s can be beneficial to under.tand the bear.ng capacity var.ation in the existence of eccentr.cally inclined loading in mountain ar.as.

关键词： Eccentr.c and inclined Power.cone pr.gr.mming r.ck mass Limit analysis Ar.ificial neur.l networ.

Can we constr.in the evolution of HI bias using configur.tion entr.py?

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r.sear.h in Astr.nomy and Astr.physics 2021年第2期21卷 82-88页

作者： Biswajit das Biswajit Pandey Depar.ment of Physics Visva-Bharati UniversitySantiniketanBirbhum731235India

We study the evolution of the configur.tion entr.py of HI distr.bution in the post-r.ionization er. assuming differ.nt time evolution of HI *** descr.be time evolution of linear.bias of HI distr.bution using a simple for. b(a)=b_(0)a^(n) with differ.nt index *** der.vative of the configur.tion entr.py r.te is known to exhibit a peak at the scale factor.cor.esponding to theΛ-matter.equality in the unbiasedΛCDM *** show that in theΛCDM model with time-dependent linear.bias,the peak shifts to smaller.scale factor. for.negative values of *** is r.lated to the fact that the gr.wth of str.ctur.s in the HI density field can significantly slow down even befor. the onset ofΛdomination in the pr.sence of a str.ng time evolution of the HI *** find that the shift is linear.y r.lated to the index *** obtain the best fit r.lation between these two par.meter. and pr.pose that identifying the location of this peak fr.m obser.ations would allow us to constr.in the time evolution of HI bias within the fr.mewor. of theΛCDM model.

关键词： methods analytical-cosmology theor.-lar.e scale str.ctur. of the univer.e

Entr.py analysis of unsteady magneto-nanofluid flow past acceler.ting str.tching sheet with convective boundar. condition

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Applied Mathematics and Mechanics(English Edition) 2015年第12期36卷 1593-1610页

作者： S.das S.CHAKr.BOr.Y r.N.JANA O.D.MAKINDE Depar.ment of Mathematics University of Gour Banga Depar.ment of Applied Mathematics Vidyasagar University Faculty of Militar. Science Stellenbosch University

The unsteady laminar.magnetohydr.dynamics （MHD） boundar. layer.flow and heat tr.nsfer.of nanofluids over.an acceler.ting convectively heated str.tching sheet ar. numer.cally studied in the pr.sence of a tr.nsver.e magnetic field with heat sour.e/sink The unsteady gover.ing equations ar. solved by a shooting method with the r.nge-Kutta- Fehlber. scheme. Thr.e differ.nt types of water.based nanofluids, containing copper. aluminium oxide, and titanium dioxide, ar. taken into consider.tion. The effects of the per.inent par.meter. on the fluid velocity, the temper.tur., the entr.py gener.tion num- ber. the Bejan number. the shear.str.ss, and the heat tr.nsfer.r.te at the sheet sur.ace ar. gr.phically and quantitatively discussed in detail. A compar.son of the entr.py gener.tion due to the heat tr.nsfer.and the fluid fr.ction is made with the help of the Bejan number. It is obser.ed that the pr.sence of the metallic nanopar.icles cr.ates mor. entr.py in the nanofluid flow than in the r.gular.fluid flow.

关键词： unsteady MHD flow nanofluid heat sour.e/sink entr.py gener.tion Bejan number

A Cocktail of Natur.l Compounds Holds Pr.mise for.New Immunother.peutic Potential in Head and Neck Cancer

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Chinese Jour.al of Integr.tive Medicine 2024年第1期30卷 42-51页

作者： Sunil Kumar.Asmita das Depar.ment of Biotechnology Delhi Technological UniversityDelhi(110042)India

Objective: To obtain detailed under.tanding on the gene r.gulation of natur.l compounds in alter.ng pr.gnosis of head and neck squamous cell car.inomas(HNSC). Methods: Gene expr.ssion data of HNSC samples and per.pher.l blood mononuclear.cells(PBMCs) of HNSC patients wer. collected fr.m Gene Expr.ssion Omnibus(GEO). Differ.ntial gene expr.ssion analysis of GEO datasets wer. achieved by the GEO2r.tool. Common differ.ntially expr.ssed ger.es(DEGs) wer. scr.ened by compar.ng DEGs of HNSC with those of PBMCs. The combination was fur.her.analyzed for.r.gulating pathways and biological pr.cesses that wer. affected. r.sults: Totally 110 DEGs wer. r.tr.eved and identified to be involved in biological pr.cesses r.lated to tumor.r.gulation. Then 102 natur.l compounds wer. scr.ened for.a combination such that the expr.ssions of all 110 commonly DEGs wer. alter.d. A combination of salidr.side, ginsenoside r., or.donin, br.tanin, and scutellar.in was chosen. A multifaceted, multi-dimensional tumor.r.gr.ssion was showed by alter.ng autophagy, apoptosis, inhibiting cell pr.lifer.tion, angiogenesis, metastasis and inflammator. cytokines pr.duction. Conclusions: This study has helped develop a unique combination of natur.l compounds that will mar.edly r.duce the pr.pensity of development of dr.g r.sistance in tumor. and immune evasion by tumor.. The r.sult is cr.cial to developing a combinator.al natur.l ther.peutic cocktail with accentuated immunother.peutic potential.

关键词： natur.l compounds chemopr.ventive gene expr.ssion head and neck cancer immunomodulator salidr.side ginsenoside r. or.donin br.tanin scutellar.in

Boulder.induced for. r.ughness and skin shear.str.sses in a gr.vel-bed str.am

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Jour.al of Mountain Science 2024年第1期21卷 346-360页

作者： das r.tul DATTA Akash Civil Engineer.ng Depar.ment National Institute of Technology AgartalaAgartala-799046India

Boulder.spacing in mountain r.ver. and near.wake flow zones within the boulder.ar.ay is ver. useful for.fish habitat and gr.wth of aquatic *** pr.sent study aims to investigate how the boulder.ar.ay and spacing influence the near.bed flow str.ctur.s in a gr.vel-bed *** ar. stagger.d over.a gr.vel-bed str.am with thr.e differ.nt inter.boulder.spacing namely(a)lar.e(b)medium and(c)small *** acoustic Doppler.velocimeter.was used for.flow measur.ments in a r.ctangular.channel and the r.sults wer. compar.d with those acquir.d fr.m numer.cal *** time-aver.ged velocity pr.files at the near.wake flow zones of boulder. exper.ence maximum flow r.tar.ation which is an outcome of the boulder.induced for. *** r.tio of velocity differ.nces associated to for. and skin r.ughness and its positive magnitude r.veals the dominance of for. r.ughness closest to the *** r.ughness computed is 1.75 to 2 times higher.than the skin r.ughness at the near.wake flow *** par.icular.the collective immobile boulder. placed at differ.nt inter.boulder.spacings developed high and low bed shear.str.sses closest to the *** low bed shear.str.sses char.cter.sed by a secondar. peak developed at the tr.ugh location of the boulder. is attr.buted to the skin shear.***,the spatial aver.ging of time-aver.ged flow quantities gives additional impetus to pr.sent an impr.ved illustr.tion of fluid shear.*** for.ation of for.-induced shear.str.ss is estimated to be 17%to 23%of doubleaver.ged r.ynolds shear.str.ss and par.ially compensates for.the damping of time-aver.ged r.ynolds shear.str.ss in the inter.acial *** quadr.nt analysis of spatial velocity fluctuations depicts that the for.-induced shear.str.sses ar. dominant in the inter.acial sub-layer.and have no significance above the gr.vel-bed sur.ace.

关键词： Ar.ay of boulder. Near.wake flow zones Velocity distr.butions Skin r.ughness For. induced shear.str.sses

BIST Design for.Detecting Multiple Stuck—Open Faults in CMOS Cir.uits Using Tr.nsition Count

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Jour.al of Computer.Science & Technology 2002年第6期17卷 731-737页

作者： Hafizur.ahaman DebeshK.das 等 IndianInstituteofInfor.ationTechnology Calcutta－700106India Depar.mentofComputer.cienceandEngineer.ng JadavpurUniversityCalcutta－700032India

This paper.pr.sents a built-in self-test (BIST) scheme for.detecting allr.bustly testable multiple stuck-open faults confined to any single complex cell of a CMOS *** test patter. gener.tor.(TPG) gener.tes all n·2~n single-input-change (SIC) or.er.d test pair.for.an n-input cir.uit-under.test (CUT) contained in a sequence of length 2n·2~n. The pr.poseddesign is univer.al, i.e., independent of the str.ctur. and functionality of the CUT. A counter.thatcounts the number.of alter.ate tr.nsitions at the output of the CUT, is used as a signatur.analyzer.(SA). The design of TPG and SA is simple and no special design-or.synthesis-for.testabilitytechniques and/or.additional contr.l lines ar. needed.

关键词： BIST CMOS complex cell stuck-open faults testing TPG

A Study of Hologr.phic Dar. Ener.y Models with Configur.tion Entr.py

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r.sear.h in Astr.nomy and Astr.physics 2023年第6期23卷 28-37页

作者： Biswajit das Biswajit Pandey Depar.ment of Physics Visva-Bharati UniversitySantiniketanBirbhum731235India

The hologr.phic dar. ener.y models pr.vide an alter.ative descr.ption of dar. *** models ar. motivated by the possible application of the hologr.phic pr.nciple to the dar. ener.y *** this wor.,we pr.sent a theor.tical study of the one par.meter.Li hologr.phic dar. ener.y and the two par.meter.Bar.ow hologr.phic dar. ener.y models using configur.tion entr.py of the matter.distr.bution in the *** configur.tion entr.py r.te exhibits a distinct minimum at a specific scale factor.that cor.esponds to the epoch,beyond which dar. ener.y takes a dr.ving r.le in the acceler.ted expansion of the *** find that the location of the minimum and magnitude of the entr.py r.te at the minimum ar. sensitive to the par.meter. of the *** find the best fit r.lations between these quantities and the par.meter. of each *** pr.pose that these r.lations can be used to constr.in the par.meter. of the hologr.phic dar. ener.y models fr.m futur. obser.ations such as the *** study suggests that the signatur. of a lar.e quantum gr.vitational effect on the futur. event hor.zon can be detected fr.m measur.ments of the configur.tion entr.py of the matter.distr.bution at multiple r.dshifts.

关键词： cosmology:theor. (cosmology:)dar. ener.y (cosmology:)lar.e-scale str.ctur. of univer.e

Wave scatter.ng by a hor.zontal cir.ular.cylinder.in a thr.e-layer.fluid

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Jour.al of Ocean Engineer.ng and Science 2016年第2期1卷 135-148页

作者： Dilip das Depar.ment of Mathematics Shibpur Dinobundhoo Institution(College)Calcutta UniversityHowrahWest BengalIndia

Using linear.water.wave theor.,wave scatter.ng by a hor.zontal cir.ular.cylinder.submer.ed in a thr.e-layer.ocean consisting of a layer.of finite depth bounded above by finite depth water.with fr.e sur.ace and below by an infinite layer.of fluid of gr.ater.density is *** cylinder.is submer.ed in either.of the thr.e *** such a situation time-har.onic waves with given fr.quency can pr.pagate with thr.e differ.nt wave *** the method of multipoles the pr.blem is r.duced to an infinite system of linear.equations which ar. solved numer.cally by standar. technique after.*** tr.nsmission and r.flection coefficients ar. obtained and depicted gr.phically against the wave number.for.all *** a two-layer.fluid ther. ar. ener.y identities that exist connecting the tr.nsmission and r.flection coefficients that *** ener.y identities ar. systematically extended to the thr.e-fluid cases which ar. obtained.

关键词： Thr.e-layer.fluid Wave scatter.ng Cir.ular.cylinder r.flection and tr.nsmission coefficients Ener.y identities