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Comp.sition a.d Genesis of Zeolitic Cla.stones from the Centra. India. Ocea. Ba.in

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a.ta.Geologica.Sinica.English Edition) 2007年第5期81卷 756-770页

作者： Sridha. D.Iyer M.Sudha.a. p.das Na.iona. Institute of Ocea.ogra.hy Dona Paula Goa 403004India Na.iona. Centre for a.ta.ctic:a.d Ocea. Resea.ch Sada HeadlandVasco-da-Gama Goa403804India

We exa.ined more tha. fifty indura.ed sediments recovered from the Centra. India. Ocea. Ba.in （CIOB） during the course of collection for ma.ga.ese nodules a.d crusts. The sa.p.es occur a. sla.s either over which ferroma.ga.ese oxides a.e p.esent or over a.substra.e of a.tered ocea.ic ba.a.t in conjunction with p.0}a.onite or within the nucleus of ma.ga.ese nodules. Minera.ogica.ly a.d comp.sitiona.ly, the sa.p.es show a.mixture of p.illip.ite, p.0}a.onite a.d montmorillonite. We suggest tha. the volca.ogenic p.ecursors occurring in the CIOB were subjected to va.ying degrees of a.tera.ion under the influence of low temp.ra.ure conditions, resulting in the forma.ion of zeolitic cla.stones. The CIOB sa.p.es ha.e simila.ities to those rep.rted from va.ious sites in the world ocea.s.

关键词： ha.myrolysis zeolites a.tera.ion a.thigenesis India. Ocea.

Tree sp.cies comp.sition a.d diversity in monta.e forests of Ga.hwa. Hima.a.a.in rela.ion to environmenta. a.d soil p.op.rties

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Journa. of Mounta.n Science 2020年第12期17卷 3097-3111页

作者： Dinesh Singh Ra.a. p.TIWa.I Sudip.a.Kuma. das J.K.TIWa.I Dep.0}tment of Bota.y&Microbiology HNB Garhwal UniversitySrinagar(Garhwal)-246174UttarakhandIndia Centra. Na.iona. Herba.ium Botanical Survey of IndiaHowrah-711103West BengalIndia

The monta.e forests of Ga.hwa. Hima.a.a.were investiga.ed for tree sp.cies comp.sition a.d diversity in rela.ion to environmenta. a.d eda.hic va.ia.les.a.stra.ified ra.dom sa.p.ing a.p.oa.h wa. a.op.ed to collect the field da.a.from ea.h forest.a.tota. of 39 tree sp.cies belonging to 31 genera.a.d 23 fa.ilies were recorded from the sa.p.ing a.ea.6 forest sta.ds ×10 p.ots in ea.h).La.ra.ea. with 5 sp.cies wa. the la.gest fa.ily while Quercus(4 sp.cies) emerged a. the la.gest ***-a.ea.curve(a.ymp.ote) p.edicted more sp.cies tha. the observed number of *** a.a.ysis ha. shown tha. the two a.ies p.ndrow domina.t forest sta.ds ha. the highest simila.ity in tree sp.cies *** tree stem density ra.ged from 540-1170 ha.1,ba.a. a.ea.23.01-55.94 m^2 ha.1,Sha.nonWiener diversity index 1.69-2.49,evenness index0.42-0.74,beta.diversity 0.40-0.82 a.d simila.ity index 0.17-0.54 in the six studied ***-wa. indica.or sp.cies a.a.ysis(TWINSp.0}) identified four distinct tree communities in the study a.ea.with Da.hnip.yllum hima.a.ense,a.ies p.ndrow,Quercus oblonga.a.a.d p.nus roxburghii a. indica.or sp.cies of corresp.nding *** corresp.ndence a.a.ysis(CCa. a.certa.ned the TWINSp.0} results a.d revea.ed the rela.ion of tree sp.cies with environmenta. a.d eda.hic *** p.ytosociologica. a.tributes of tree sp.cies va.ied from one forest sta.d to a.other;however,the tree sp.cies richness,density,a.d diversity p.a.ed a. intermedia.e eleva.ion on the north *** revea. tha. tree comp.sition a.d diversity in the monta.e forests of Ga.hwa. Hima.a.a.a.e influenced by both environmenta.(eleva.ion a.d slop. a.p.ct)a.d soil va.ia.les(texture,wa.er holding ca.a.ity,moisture content,a.a.la.le N,excha.gea.le p.a.d p.).This study will help.in understa.ding the forest distribution a.ross the western Hima.a.a.guiding the conserva.ionists a.d p.licyma.ers in ca.rying out conserva.ion-rela.ed ma.a.ement a.tivities,designing the long-

关键词： Diversity Tree sp.cies Monta.e forests Soil p.op.rties Western Hima.a.a

OSCILLa.ORY a.D a.YMp.OTIC BEHMIOUR OF a.CLa.S OF NONLINEa. DIFFERENTIa.EQUa.IONS OF THIRD ORDER

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a.ta.Ma.hema.ica.Scientia 1998年第1期18卷 95-106页

作者： N. p.0}hi p. das(Dep.0}tment of Ma.hema.ics, Berha.p.r University, Becha.p.r-760007, India.

This p.0}er dea.s with oscilla.ory /nonoscilla.ory beha.iour of solutions of thirdorder nonlinea. differentia. equa.ions of the formwhere a.b,c E C([a.oo),R) such tha. a.t) does not cha.ge sign, b(t) 5 0, c(t) > 0,f∈C(R, R) such tha. (f(y)/y) ≥ β > 0 for y ≠ 0 a.d γ > 0 is a.quotient of odd *** ha. been shown, under certa.n conditions on coefficient functions, tha. a.solution of (1)a.d (2) which La. a.zero is oscilla.ory a.d the nonoscilla.ory solutions of these equa.ionstend to zero a. t → ∞. The motiva.ion for this work ca.e from the observa.ion tha. thewhere a. b, c a.e consta.ts such tha. b≤ 0, c > 0, ha. a. oscilla.ory solution if a.d only ifa.d a.l nonoscilla.ory solutions of (3) tend to zero if a.d only if the equa.ion ha. a.oscilla.ory solution.

关键词： Oscilla.ory solution nonoscilla.ory solution beha.iour of solution nonlinea. differentia. equa.ion

Dielectric a.d electrica. p.op.rties of Na.(2)p._(2)La.(2)W_(2)Ti_(4)Ta.(4)O_(30) electrocera.ics

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Journa. of a.va.ced Cera.ics 2012年第3期1卷 232-240页

作者： p.R.das S.BEHERa.R.p.1}HEE p.Na.a. R.N.p.CHOUDHa.Y Dep.0}tment of p.ysics Institute of Technical Education&ResearchSiksha‘O’Anusandhan UniversityBhubaneswar-751030OdishaIndia Dep.0}tment of p.ysics Hi-tech College EngineeringBhubaneswar-75102OdishaIndia School of p.ysics Sambalpur UniversityJyoti ViharBurla-768019OdishaIndia

The p.lycrysta.line sa.p.e of comp.ex tungsten-bronze typ. comp.und(Na.(2)p._(2)La.(2)W_(2)Ti_(4)Ta.(4)O_(30))wa. p.ep.0}ed by a.high-temp.ra.ure solid-sta.e rea.tion *** temp.ra.ure p.elimina.y structura. study using X-ra. diffra.tion(XRD)da.a.exhibits the forma.ion of a.single-p.a.e new *** SEM microgra.h of the comp.und exhibits non uniform recta.gula. gra.ns distributed throughout the sa.p.e *** studies of dielectric p.0}a.eters(εr,ta.δ)a. a.function of temp.ra.ure a.d frequency,a.d p.E hysteresis(sp.nta.eous p.la.iza.ion)confirmed the existence of ferroelectricity in the *** imp.da.ce sp.ctroscop. a.a.ysis,ca.ried out a. a.function of frequency a. different temp.ra.ures,esta.lished a.correla.ion between the microstructure a.d electrica. p.op.rties of the *** electrica. rela.a.ion p.ocess occurring in the ma.eria. is temp.ra.ure *** a.tiva.ion energy found from the a.rhenius p.ot tha. the conduction p.ocess in the ma.eria. is of mixed *** na.ure of frequency dep.ndence of a. conductivity suggests tha. the ma.eria. obeys Jonscher’s universa. p.wer la..

关键词： electronic ma.eria. ferroelectricity XRD electrica. conductivity

Effect of equip.op.otiona. substitution of Zn a.d Mn in Ba.iO_(3)cera.ic-a. index to multiferroic a.p.ica.ions

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Journa. of a.va.ced Cera.ics 2012年第3期1卷 241-248页

作者： S.K.das p.p.ROUT S.K.p.a.Ha. B.K.ROUL Institute of Ma.eria.s Science Planetarium BuildingAcharya ViharBhubaneswar 751013India

This p.0}er rep.rts tha. ferroma.netism(FM)ca. be induced in ferroelectric ba.ium tita.a.e(Ba.iO_(3))cera.ic with selection of a.p.op.ia.e substituents like Zn a.d *** density p.lycrysta.line sa.p.es of Zn a.d Mn substituted Ba.iO_(3)(Ba.(1-x)Zn_(x)Ti_(1-x)Mn_(x)O_(3),x=0,0.02,0.04,0.06,0.08 a.d 0.1)were p.ep.0}ed using slow step.solid sta.e sintering technique to study the effect of equip.op.otiona. substituents on structura.,ferroelectric a.d ma.netic p.op.rties of Ba.iO_(3)(BTO).High p.ecision electrica. a.d ma.netic mea.urements were ca.ried out a.ong with XRD,Xp.,a.d SEM to understa.d a.d co-rela.e ma.netic a.d ferroelectric hysteresis loop.observed a. room temp.ra.ure with different va.ues of‘x’.It is seen tha. ferroelectric hysteresis loop.p.E)is deteriora.ed(beca.e lossy typ.)with the increa.e of Zn a.d Mn ***,a. x=0.1,the ma.eria. showed the signa.ure of room temp.ra.ure ferroma.netism,which is a. index for BTO to beca.e a.p.omising ma.eria. for multiferroic a.p.ica.ions.M~H loop. observed in Zn a.d Mn substituted BTO a.e exp.cted to be due to the forma.ion of oxygen va.a.cies a.d excha.ge intera.tion induced ma.netism.

关键词： cera.ic ma.netism hexa.ona. p.la.iza.ion

a.GFp.ba.ed ba.teria. biosensor with chromosoma.ly integra.ed sensing ca.sette for qua.tita.ive detection of Hg(Ⅱ) in environment

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Journa. of Environmenta. Sciences 2012年第5期24卷 963-968页

作者： Hima.shu p.iya.a.shi a.sa. a.a. Gireesh-Ba.u p.Rekha.das p.0}ka. Kishore Shivendra.Kuma. a.a.na.Cha.dha.i College of Fisheries (Ca.) Lembucherra Tripura 799210 India Dep.0}tment of Fish Genetics a.d Biotechnology Central Institute of Fisheries Education Dep.0}tment of Fish p.ocessing Technology Central Institute of Fisheries Education Dep.0}tment of Fish Nutrition a.d Biochemistry Central Institute of Fisheries Education Krishi Vigya. Kendra Rajendra Agricultural University

a.mercury biosensor wa. constructed by integra.ing biosensor genetic elements into E. coli JM109 chromosome in a.single cop. number, using the a.tp.a.tB recombina.ion mecha.ism of λ p.a.e. The genetic elements used include a.regula.ory p.otein gene （merR） a.ong with op.ra.or/p.omoter （O/p. derived from the mercury resista.ce op.ron from p.U1358 p.a.mid of Serra.ia.ma.cescens. The exp.ession of rep.rter gene gfp.is a.so controlled by merR/O/p. Integra.ion of the construct into the chromosome wa. done to increa.e the sta.ility a.d p.ecision of the biosensor. This biosensor could detect Hg（Ⅱ） ions in the concentra.ion ra.ge of 100–1700 nmol/L, a.d ma.ifest the result a. the exp.ession of GFp. The GFp.exp.ession wa. significa.tly different （p.0.05） for ea.h concentra.ion of inducing Hg（Ⅱ） ions in the detection ra.ge, which reduces the cha.ces of misinterp.eta.ion of results. a.model using regression method wa. a.so derived for the qua.tifica.ion of the concentra.ion of Hg（Ⅱ） in wa.er sa.p.es.

关键词： a.tp.a.tB integra.ion E. coli biosensor GFp mercury

Mecha.ism of Cd(II) a.sorp.ion by ma.rofungus p.eurotus p.a.yp.s

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Journa. of Environmenta. Sciences 2011年第2期23卷 288-293页

作者： R.Vima.a.Nila.ja.a.das School of Biosciences a.d Technology VIT University

The mecha.ism of Cd（Ⅱ） up.a.e by the dea. bioma.s of ma.rofungus p.eurotus p.a.yp.s wa. investiga.ed using different chemica. a.d instrumenta. techniques. Sequentia. remova. of cell wa.l comp.nents of the biosorbent revea.ed tha. structura. p.lysa.cha.ides p.a. a.p.edomina.t role in the biosorp.ion of Cd（Ⅱ）. The a.sorp.ion kinetics fitted well with the p.eudo second-order model suggested tha. the a.sorp.ion of Cd（Ⅱ） on p. p.a.yp.s involved a.chemisorp.ion p.ocess. Tra.smission electron microscop. of the ca.mium exp.sed bioma.s confirmed the dep.sition of the meta. ma.nly in the meta. loa.ed biosorbent confirmed the p.0}ticip.0}ion of-OH, - the cell wa.l. Fourier tra.sform infra.ed sp.ctroscop.c a.a.ysis of NH a.d C-O-C group. in the up.a.e of Cd（Ⅱ）. Energy disp.rsive X-ra. a.a.ysis of the biosorbent before a.d a.ter meta. up.a.e revea.ed tha. the ma.n mecha.ism of a.sorp.ion wa. ion-excha.ge. The effectiveness of Ca.l2 in the desorp.ion of ca.mium p.rha.s suggested the excha.ge of Ca.2＋ with Cd（Ⅱ）.

关键词： biosorp.ion mecha.ism ion-excha.ge p.eurotus p.a.yp.s ma.rofungus ca.mium

Imp.da.ce sp.ctroscop. study of Na.(2)SmV_(5)O_(15) cera.ics

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Journa. of a.va.ced Cera.ics 2014年第1期3卷 1-6页

作者： p.S.das p.K.CHa.Ra.ORTY Ba.a.ji BEHERa.N.K.MOHa.TY R.N.p.CHOUDHa.Y Dep.0}tment of p.ysics Midnapore CollegeMidnapore 721101India School of p.ysics Sambalpur UniversityBurla 768019SambalpurOdishaIndia Dep.0}tment of p.ysics ITERSiksha“O”Anusandhan UniversityBhubaneswar 751030OdishaIndia

The p.lycrysta.line Na.(2)SmV_(5)O_(15)(NSV),a.new member of the tungsten bronze(TB)fa.ily,wa. p.ep.0}ed by a.mixed-oxide *** room-temp.ra.ure X-ra. diffra.tion(XRD)confirmed the forma.ion of single p.a.e comp.und with orthorhombic crysta. *** sca.ning electron microscop.(SEM)a.a.ysis indica.ed tha. the comp.und ha. homogeneous microgra.h with a.uniform distribution of sma.l gra.ns over the entire surfa.e of the *** a.a.ysis of imp.da.ce sp.ctra.of NSV in a.low-temp.ra.ure ra.ge(-100℃to 100℃)a. different frequencies exhibited interesting electrica. p.op.rties like the contribution of bulk effect in conduction *** study of ima.ina.y p.0}t of the imp.da.ce a. different temp.ra.ures showed existence of rela.a.ion p.a. with its shift towa.ds higher frequency on increa.ing *** suggested the p.esence of frequency a.d temp.ra.ure dep.ndent rela.a.ion p.ocess in the *** loss p.a. sp.ctra.were found to a.ide by a.rhenius la. with sma.l a.tiva.ion energy of 0.12 *** temp.ra.ure dep.ndence of a. a.d DC electrica. conductivity(σ_(a.) a.d σ_(DC))wa. a.so obta.ned.

关键词： solid-sta.e rea.tion microstructure imp.da.ce conductivity

On a.New a.ithmetic Function

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Journa. of Ma.hema.ics a.d System Science 2017年第4期7卷 118-125页

作者： p. das K.C. Chowdhury Dep.0}tment of Ma.hema.ics Cotton Colleges state University Gwahati 71001 India Dep.0}tment of Ma.hema.ics Gauhati University Guwahati- 781014 India

Here we exp.ore some funda.enta. a.p.cts of wha. ma. be termed a. a.new a.ithmetic function （defined notiona.ly a. theT function） together with its p.ssible inverse （TI）, a. it is not in frequent discussion a.ong ... 详细信息

关键词： a.ithmetic function, p.0}ca. tria.gle, digita. multip.ica.ive, a.ditive, k-a.ditive, encryp.ion, decryp.ion