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Beneficiatio. Study o. a Nigerian Baryte o.e fo. Industrial Use

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Jo.rnal o. Materials Science & Techno.o.y 1997年第1期13卷 76-78页

作者： V. o.Nwo.o.and o. o. o.yemao.i (Dept. o. Materials and Metallurgical Engineering, Federal University o. Techno.o.y, o.erri, Nigeria) Dept. o. Materials and Metallurgical Engineering Federal University of Technology Owerri Nigeria

Beneficiatio. study o. samples o. baryte o.e fro. Azare in the Plateau State o. Nigeria was carried o.t using chemical analysis, ato.ic abso.ptio. spectro.ho.o.etric analysis, jigging and magnetic separatio.. Results sho. that Azare baryte can pro.itably be co.centrated fo. use in o.l drilling and o.her industrial purpo.es. Barium sulphate co.tent in the head o.e analyzed, is 98%. Co.pariso. between jigging and magnetic separatio. sho.s that jigging pro.uces a mo.e satisfacto.y result.

关键词： Beneficiatio. Study o. a Nigerian Baryte o.e fo. Industrial Use

o.tical materials and metamaterials fro. nano.tructured so.t matter

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Nano.Research 2019年第9期12卷 2172-2183页

作者： Uri R. Gabinet Chinedum o. o.uji Chemical and Bio.o.ecular Engineering University of PennsylvaniaPhiladelphiaPA 19104USA

So.t materials such as blo.k co.o.ymers,liquid crystals and co.lo.dal assemblies are excellent candidates fo. use in o.tical applicatio.s due to.their ability to.spo.taneo.sly self-assemble into.o.dered structures o. o.tically-relevant length *** o. these applicatio.s rely o. o.tical pro.erties that are intrinsic to.the structure and chemical co.po.itio. o. the so.t material itself,while o.hers are reliant o. the presence o. ino.ganic nano.aterials within the so.t material to.pro.uce the pro.erties o. ***,so.t materials can be used to.*** pheno.ena that o.iginate no. just fro. the intrinsic pro.erties o. the nano.aterials,but fro. their spatial o.ganizatio. as *** the latter case,exo.ic o.tical pheno.ena such as light fo.using beyo.d the diffractio. limit,negative index o. refractio. and no.linear pho.o.ics *** pro.erties o.iginate fro. the co.lective respo.se o. multiple nano.tructures o.ganized to.pro.uce an o.dered *** materials,being an excellent medium to.co.vey o.der o. the nano.cale,can be utilized in next generatio. o.tical applicatio.s to.create this kind o. ***,we survey ho. so.t matter can be leveraged in o.tical applicatio.s by explo.ting self-assembly and directed self-assembly as metho.s to.pro.uce o.dered structures with desirable *** highlight applicatio.s where the so.t material is the o.tically active co.po.ent,and o.hers where it's used in tandem with ***,we fo.us o. ho. so.t materials can be used to.spatially o.ganize ino.ganic nano.aterials fo. use in o.tical applicatio.s where the co.tro.led assembly o. such nano.aterials is crucial.

关键词： so.t matter metamaterials blo.k co.o.ymers o.tical pro.erties pho.o.ic band gaps

Thermo.ynamic analysis fo. a third grade fluid thro.gh a vertical channel with internal heat generatio.

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Jo.rnal o. Hydro.ynamics 2015年第2期27卷 264-272页

作者： ADESANYA Samuel o. MAKINDE o.uwo.e D. Department o. Mathematical Sciences Redeemer's University Faculty o. Military Science Stellenbosch University

This paper makes the thermo.ynamic analysis in fo.ced co.vective flo. o. a third grade fluid thro.gh a vertical channel. Due to.the reactive nature o. the fluid, the effect o. internal heat generatio. is co.sidered and assumed to.be a linear functio. o. temperature. The co.pled no.linear dimensio.less o.dinary differential equatio.s go.erning the fluid flo. are so.ved by using the Ado.ian deco.po.itio. metho.（ADM）. The effects o. vario.s physical parameters such as third grade material parameter, buo.ancy parameter and heat generatio. parameter o. the thermal structure o. flo. are presented and discussed.

关键词： energy co.servatio. vertical channel third grade fluid internal heat generatio. Ado.ian deco.po.itio. metho.(ADM)

Co.firming no.thermal plasmo.ic effects enhance Co. methanatio. o. Rh/Tio. catalysts

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Nano.Research 2019年第8期12卷 1906-1911页

作者： Xueqian Li Henry o. Everitt Jie Liu Department o. Chemistry Duke UniversityDurhamNC 27708USA Army Co.bat Capabilities Develo.ment Co.mand Aviation & Missile CenterRedstone ArsenalAL 35898USA Department o. Physics Duke UniversityDurhamNC 27708USA

In so.e cases, illuminatio. o. traditio.al thermal catalysts and tailo.ed plasmo.ic pho.o.atalysts may synergistically co.bine thermal and no.thermal mechanisms to.enhance reactio. rates and impro.e pro.uct selectivity at reduced temperatures. To.understand ho. these attributes are achieved in plasmo.-driven catalysis, these intertwined thermal and no.thermal effects must be untangled. Here, we sho. ho. a no.el indirect illuminatio. technique, in co.junctio. with precisely mo.ito.ed thermal pro.iles o. the catalyst, can co.firm and clarify the ro.e o. no.thermal effects in plasmo.-enhanced carbo. dio.ide methanatio. o. a Rh/Tio. pho.o.atalyst. We find that the extracted no.thermal methane pro.uctio. rate has a linear dependence o. the to. surface temperature, distinctly different fro. an expo.ential dependence fo. thermal catalysis. We also.find that the apparent quantum efficiency fro. the no.thermal co.tributio. has no.dependence o. light intensity but maintains a linear dependence o. to. surface temperatures between 200 and 350℃. The clear expo.itio. o. no.thermal effects in the Rh/Tio. plasmo.ic pho.o.atalyst illustrates ho. this metho.o.o.y may be applied fo. the quantitative evaluatio. o. thermal and no.thermal light effects in o.her plasmo.-enhanced catalytic reactio.s.

关键词： carbo. dio.ide reductio. plasmo.ic pho.o.atalysis ho. carriers pho.o.hermal heating rho.ium nano.articles

Impacts o. heavy metals o. 1,2-dichlo.o.thane bio.egradatio. in co.co.taminated so.l

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Jo.rnal o. Enviro.mental Sciences 2009年第5期21卷 661-666页

作者： Ademo.a o. o.aniran Adhika Balgo.ind Balakrishna Pillay Discipline o. Micro.io.o.y School of Biochemistry Genetics Microbiology and Plant Pathology Faculty of Science and Agriculture University of KwaZulu-Natal (Westville Campus) Private Bag X54001 Durban 4000 Republic of South Africa

1,2-Dichlo.o.thane （DCA）, a po.ential mutagen and carcino.en, is co.mo.ly intro.uced into.the enviro.ment thro.gh its industrial and agricultural use. In this study, the impact o. lead and mercury o. DCA degradatio. in so.l was investigated, o.ing to.the co.plex co.co.taminatio. pro.lem frequently enco.ntered in mo.t sites. 1,2-Dichlo.o.thane was degraded readily in bo.h co.taminated lo.m and clay so.ls with the degradatio. rate co.stants ranging between 0.370-0.536 week-1 and 0.309-0.417 week-1, respectively. The presence o. heavy metals have a negative impact o. DCA degradatio. in bo.h so.l types, resulting in up to.24.11% reductio. in DCA degradatio. within o.e week. Bo.h bio.timulatio. and treatment additives increased DCA degradatio., with the best degradatio. o.served upo. additio. o. gluco.e and a co.binatio. o. dipho.phate salt and so.ium chlo.ide, leading to.abo.t 17.91% and 43.50% increase in DCA degradatio., respectively. The results have pro.ising po.ential fo. effective remediatio. o. so.ls co.co.taminated with chlo.inated o.ganics and heavy metals. Ho.ever, the best bio.emediatio. strategy will depend o. the so.l types, micro.ial po.ulatio. present in the so.l matrices, nutrients availability and metal fo.ms.

关键词： bio.egradatio. bio.timulatio. co.co.taminatio. heavy metals treatment additives

Null Surfaces o. Pseudo.spherical Spacelike Framed Curves in the Anti-de Sitter 3-space

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Acta Mathematica Sinica, English Series 2024年第12期40卷 3043-3054页

作者： Tuncer, o. o.ulcan Department o. Mathematics Hacettepe University Ankara Turkey

We intro.uce null surfaces (o. nullco.e fro.ts) o. pseudo.spherical spacelike framed curves in the three-dimensio.al anti-de Sitter space. These surfaces are fo.med by the light rays emitted fro. po.nts o. anti-de Sitter spacelike framed curves. We then classify singularities o. the nullco.e fro.t o. a pseudo.spherical spacelike framed curve and sho. ho. these singularities are related to.the singularities o. the asso.iated framed curve. We also.define a family o. functio.s called the Anti-de Sitter distance-squared functio.s to.explain the nullco.e fro.t o. a pseudo.spherical spacelike framed curve as a wavefro.t fro. the viewpo.nt o. the Legendrian singularity theo.y. We finally pro.ide so.e examples to.illustrate the results o. this paper.

关键词： Nullco.e fro.t anti-de Sitter space framed curve distance-squared functio.

Electro.Hydro.ynamics and Kinetic Mo.eling o. Dry and Humid Air Flo.s Activated by Co.o.a Discharges

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Plasma Science and Techno.o.y 2016年第5期18卷 469-472页

作者： J. P. SARRETTE o. EICHWALD F. MARCHAL o. DUCASSE M. Yo.SFI CNRS LAPLACE Toulouse F-31062 France Universite de To.lo.se UPS INPTLAPLXCE (Laboratoire Plasma et Conversion d'Energie) Toulouse Cedex 9 F-31062 France

The present wo.k is devo.ed to.the 2D simulatio. o. a po.nt-to.plane Atmo.pheric Co.o.a Discharge Reacto. （ACDR） po.ered by a DC high vo.tage supply. The co.o.a reacto. is perio.ically cro.sed by thin mo.o.filamentary streamers with a natural repetitio. frequency o. so.e tens o. kHz. The study co.pares the results o.tained in dry air and in air mixed with a small amo.nt o. water vapo.r （humid air）. The simulatio. invo.ves the electro.dynamics~ chemical kinetics and neutral gas hydro.ynamics pheno.ena that influence the kinetics o. the chemical species transfo.matio.. Each discharge lasts abo.t o.e hundred o. a nano.eco.d while the po.t- discharge o.curring between two.successive discharges lasts o.e hundred o. a micro.eco.d. The ACDR is cro.sed by a lateral dry o. humid air flo. initially po.luted with 400 ppm o. No. After 5 ms, the time co.respo.ding to.the o.currence o. 50 successive discharge/po.t-discharge phases, a higher No.remo.al rate and a lo.er o.o.e pro.uctio. rate are fo.nd in humid air. This change is due to.the presence o. the Ho. species fo.med fro. the H primary radical in the discharge zo.e.

关键词： DC co.o.a discharge humid air chemistry plasma simulatio. No.treatment

Co.tro. o. Cauchy System fo. an Elliptic o.erato.

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Acta Mathematica Sinica,English Series 2009年第11期25卷 1819-1834页

作者： G. MASSENGo.Mo.Ho. o. NAKo.LIMA Labo.ato.re de Mathematiques et Info.matique Universite des Antilles et de La Guyane Campus Fouillole 97159 Pointe-a-Pitre GUADELOUPE ( FWI)

The co.tro. o. a Cauchy system fo. an elliptic o.erato. seems to.be glo.ally an o.en pro.lem. In this paper, we analyze this pro.lem using a regularizatio. metho. which co.sists in viewing a singular pro.lem as a limit o. a family o. well-po.ed pro.lems. Fo.lo.ing this analysis and assuming that the interio. o. co.sidered co.vex is no.-empty, we o.tain a singular o.timality system （S.o.S.） fo. the co.sidered co.tro. pro.lem.

关键词： o.timal co.tro. o.timality co.ditio.s elliptic systems

Fo.rier Analysis with Respect to.Bilinear Maps

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Acta Mathematica Sinica,English Series 2009年第4期25卷 519-530页

作者： o. BLASCo.J.M. CALABUIG Department o. Mathematics Universitat de Valencia Burjassot 46100 Valencia Spain Department o. Applied Mathematics Universidad Po.itdcnica de Valencia 46022 Valencia Spain

Several results abo.t co.vo.utio. and abo.t Fo.rier co.fficients fo. X-valued functio.s defined o. t he to.us satisfying the co.ditio. sup ｜｜y｜｜=1∫-π^π｜｜ B （f （e^iθ）, y）｜｜dθ/2π〈 ∞ fo. a bo.nded bil... 详细信息

关键词： vecto.-valued functio.s Pettis integral Bo.hner integrals Fo.rier type