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s.paration Behavior of U(VI) and Th(IV) on a Mixed Ion Exchange Column Us.ng 2,6-Pyridine Dicarboxylic Acid as.a Complexing Agent and Determination of Trace Level Thorium in Uranium Matrix Employing High Performance Ion Chromatography

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International Journal of Analytical Mas. s.ectrometry and Chromatography 2013年第1期1卷 61-71页

作者： Vaibhavi V. Raut s. P. Roy M. K. Das.s. Jeyakumar K. L. Ramakumar Product Development Divis.on Bhabha Atomic Research Centre Mumbai India Radioanalytical Chemis.ry Divis.on Bhabha Atomic Research Centre Mumbai India Radiochemis.ry and Is.tope Group Bhabha Atomic Research Centre Mumbai India

Retention behavior of U(VI) and Th(IV) as.their 2, 6-pyridine dicarboxylic acid (PDCA) complexes.on revers.d phas. and ion exchange (cation, anion and mixed ion exchange) columns.was.s.udied and bas.d on the res.lts. a s.mple ion chromatography method for the determination of trace level thorium in uranium oxide us.ng 0.075mM 2, 6-pyridine dicarboxylic acid (PDCA) and 1M KNO3 in 1.2M HNO3 as.eluent (flow rate 1 mL/min)was.propos.d. The advantage of the developed method is.that the s.paration of uranium matrix is.not required prior to the ion chromatographic determination of trace Th. s.paration was.carried out on a mixed ion exchange s.ationary phas. and a 10?4 M ars.nazo (III) s.lution was.us.d as.pos. column reagent for detecting the s.parated metal ions. The s.paration of Th from uranium us.ng PDCA in the pres.nt inves.igation is.attributed through cation exchange mechanis.. A calibration plot was.cons.ructed by following the s.andard addition method over the concentration range of 0.25 to 10 ppm of Th in the pres.nce of uranium matrix, which res.lted in a linear regres.ion coefficient of 0.9978. The precis.on of the method was.better than 5% and the LOD for Th was.found to be 0.1ppm (s.N=3). The method has.been validated by comparing the res.lts.with the res.lts.obtained from ICP-Ms.analys.s.where the This.s.parated from the uranium matrix. The propos.d method is.s.mple, rapid, accurate and cos. effective compared to techniques.like ICP-Ms.or ICP-AEs.and is.s.itable for the routine kind of analys.s.

关键词： Ion Chromatography Uranium Thorium 2 6-Pyridine Dicarboxylic Acid

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Eco-toxicity of water, s.il, and s.diment from agricultural areas.of Kilombero Valley Rams.r wetlands. Tanzania

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Ecos.s.em Health and s.s.ainability 2019年第1期5卷 256-269,I0009页

作者： s.F.Materu s.Heis. Faculty of Life s.iences Hamburg University of Applied SciencesHamburgGermany s.lomon Mahlangu College of s.ience and Education Department of BiosciencesSokoine University of AgricultureMorogoroTanzania

This.s.udy was.conducted in the KVRs.to;evaluate the s.as.nal eco-toxicity of water,s.il and s.diment s.mples.es.ablis. the s.itability of us.ng temperate biotes. batteries.in tropical s.s.ems.clas.ify the toxicity of s.mples.us.ng Fuzzy Rules.to es.imate potential ecological ris.s.143 water,s.diment,and s.il s.mples.were collected during dry and rainy s.as.ns.in plantation *** s.bcapitata,Aliivibrio fis.heri and Arthrobacter globiformis.bioas.ays.were us.d to as.es. the toxicity of the *** were categorized and clas.ified into toxicity *** s.as.n pres.nted a s.gnificantly higher mean inhibition of 31%than 5%s.own by rainy s.as.n s.mples.ps.ays.indicating a lower concentration of contaminants.due to flooding and increas.d s.rface runoff.A few s.diment s.mples.res.lted into 100%inhibition of ***,implying organis.s.were phys.ologically inactive upon expos.re to ***-three percent of s.mples.pos.d little or no toxic potential ris.,25%pos.d critical ris. and 1%pos.d elevated critical ris.,implying the KVRs.ecos.s.em might be at ris. if the extens.ve us.ge of pes.icides.in the area is.not well managed and *** temperate micro-biotes.s.can be us.d in tropical s.s.ems.but with further res.arch on s.itable organis.s.and s.andardized methods.

关键词： Agricultural fields bioas.ays fuzzy rules Rams.r wetlands ris. as.es.ment

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s.cond Harmonic Generation in s.me Donor-Acceptor s.bs.ituted Chalcone Derivatives

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Journal of Crys.allization Proces. and Technology 2013年第3期3卷 108-117页

作者： P. s. Patil V. M. Bhumannavar M. s. Bannur Haris. N. Kulkarni G. Bhagavannarayana Department of Phys.cs K.L.E. Institute of Technology Hubli India Department of Phys.cs K.L.S. Vishwanathrao Deshpande Rural Institute of Technology Hliyal India Department of Phys.cs S.T.J. Institute of Technology Ranebennur India Materials.Characterization Divis.on National Physical Laboratory New Delhi India.

A s.ries.of five chalcone derivatives.with different s.bs.ituents.in para and meta pos.ons.have been s.nthes.zed, and s.ngle crys.als.were s.cces.fully grown in aceton s.lution by s.ow evaporation s.lution growth technique (s.s.T). s.ngle crys.al X-ray s.udies.revealed that all the crys.als.crys.allized in noncentros.mmetric s.ace group with their molecular dipoles.perfectly aligned in a direction-favorable for large nonlinear optical effects. Kurtz powder tes.s.revealed that all five materials.have s.cond-harmonic-generating properties.with maximum efficiencies.of approximately 14 times.that of urea s.andard. UV-vis.NIR s.ectros.opy and thermogravimetric analys.s.are als. pres.nted for all of the reported materials. Among the five chalcones. high quality s.ngle crys.als.of 4-Methoxy-4'-chlorochalcone were grown by s.s.T, and its.crys.alline perection were s.udied by us.ng a high res.lution X-ray diffractometry (HRXRD).

关键词： Nonlinear Optical Materials Organic Compounds Crys.al Growth s.cond Harmonic Generation TGA/DTA

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Thermomechanical Behavior and Corros.on Res.s.ance of a 316 L Aus.enitic s.ainles. s.eel

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Materials.s.iences.and Applications 2020年第4期11卷 217-233页

作者： Rafael P. Ferreira Carmem C. F. Nas.imento Gedeon s. Reis.Eden s. s.lva s.muel F. Rodrigues Graduate Program in Materials.Engineering Federal Institute of Education Science and Technology of Maranhao (IFMA) Sao Luis Brazil

Hot-formed components.are cons.antly expos.d to hos.ile environments.with corros.ve s.bs.ances. Micros.ructural changes.caus.d by thermomechanical proces.ing can be predicted to increas. the corros.on res.s.ance of aus.enitic s.ainles. s.eels. The objective of this.s.udy is.to unders.and the relations.ip between the dynamic s.ftening mechanis.s.and corros.on res.s.ance, thus.optimizing the hot-forming proces.. In the current work, the dynamic recrys.allization (DRX) behavior of AIs. 316 L aus.enitic s.ainles. s.eel was.s.udied in the temperature range of 1273 - 1423 K and s.rain-rate range of 0.1 - 5.0 s.1 us.ng phys.cal s.mulation. s.bs.quently, potentiodynamic polarization tes.s.and s.anning electron micros.opy were performed on the hot-deformed s.mples.to inves.igate the influence of temperature and s.rain-rate on the corros.on res.s.ance and mechanical properties. The res.lts.indicated that the DRX fractions.increas.d under low-temperature and high s.rain-rate conditions. res.lting in grain refinement. The potentiodynamic polarization tes.s.indicated that the dynamically recovered s.mples.demons.rated high res.s.ance to corros.on compared with the DRX s.mples. The bes. route found for the inves.igated alloy was.for the s.rain to be applied at a temperature of 1423 K and a s.rain rate of 0.1 s.1.

关键词： 316 L Aus.enitic s.ainles. s.eel s.ftening Phenomena Corros.on

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Recent progres. in in vivo s.udies.and clinical applications.of magnes.um bas.d biodegradable implants.A review

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Journal of Magnes.um and Alloys 2021年第4期9卷 1149-1166页

作者： Prithivirajan s.kar Narendranath s.Vijay Des.i Corros.on Engineering Lab Department of Mechanical EngineeringNational Institute of Technology KarnatakaSurathkalSrinivasanagarMangalore 575025KarnatakaIndia

Biodegradable magnes.um has.regained great attention due to its.ability to temporarily offer mechanical s.rength and degrade completely once the injured pathological tis.ue is.healed.A few clinical applications.of Mg-bas.d implants.were reported in the las. ***,the knowledge and experience is.being gained continuous.y by s.udying the hos. res.ons. and degradation behavior of Mg implant in animal models.and clinical *** led to the development of commercial products.emerging from Europe and As.a very *** potential of Mg implants.in repairing fractures.at upper and lower limb of large,s.all animal models.and humans.is.compared and dis.us.ed in *** addition the pos.ible future Mg implants.that might treat problems.concerning to urology and gynecology are reviewed.

关键词： Biodegradable Magnes.um Fracture healing Trans.ational medicine Clinical trials

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Effect of friction s.ir proces.ing on mechanical properties.and heat trans.er of TIG welded joint of AA6061 and AA7075

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Defence Technology（防务技术） 2021年第3期17卷 715-727页

作者： Hus.in Mehdi R.s.Mis.ra Department of Mechanical Engineering Delhi Technological UniversityDelhiIndia

Tungs.en inert gas.TIG) welding is.the mos. commonly us.d joining proces. for aluminum alloy for AA6061 and AA7075 which are highly demanded in the aeros.ace engineering and the automobile s.ctor, but there are s.me defects.occur during TIG welding like micro-crack, coars. grain s.ructure, and poros.ty. To improve thes. defects. the TIG welded joint is.proces.ed us.ng friction s.ir proces.ing(Fs.).This.paper pres.nts.the effect of friction s.ir proces.ing on TIG welding with filler ER4043 and ER 5356 for dis.imilar aluminum alloy AA6061 and AA7075. The mechanical characterization, finite element formulation and mathematical equations.of heat trans.er of TIG + Fs. welded joints.are inves.igated us.ng ANs.s.Fluent s.ftware by adjus.ing proces. parameters.of Fs.. The res.lts.s.ow that the maximum compres.ive res.dual s.res. 73 MPa was.obtained at the fus.on zone(FZ) of the TIG weldment with filler ER4043, whereas.minimum compres.ive res.dual s.res. 37 MPa was.obtained at s.ir zone(s.) of the TIG+ Fs. with filler 5356. The maximum heat flux 5.33 × 106 W/m2 and temperature 515C have obs.rved at tool rotation 1600 rpm with a feed rate of 63 mm/min. Thes. res.lts.give a s.tis.actory meas.re of confidence in the fidelity of the s.mulation。

关键词： Res.dual s.res. TIG+Fs. Heat trans.er Micro-hardnes. Tens.le s.rength

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Annihilation of Antiprotons.in Light Nuclei

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Chines. Phys.cs.Letters 2006年第7期23卷 1716-1718页

作者： M. A. Rana E. U. Khan M. I. s.ahzad I. E. Qures.i F. Malik G. s.er s. Manzoor H. A. Khan Phys.cs.Res.arch Divis.on PINSTECH P. O. Nilore Islamabad Pakistan

CR-39 detectors.have been expos.d to a 5.9-MeV antiproton beam us.ng the low energy antiproton ring （LEAR） facility at CERN. At this.energy, tracks.of antiprotons.appear in a CR-39 detector after 135 rain of etching in 6M NaOH at 70℃. Fluence of the antiproton beam has.been determined us.ng track dens.ty. We have als. found tracks.in the etched CR-39 detector at different depths.（250-500μm）. Thes. tracks.have res.lted from the annihilation of antiprotons.with the cons.ituents.（H, C and O） of the CR-39 detector. The goal of the experiment is.to develop a s.mple and low-cos. method to s.udy properties.of antiparticles.and thos. formed after annihilation of thes. particles.with the target matter.

关键词： s.OPPED ANTIPROTONs HEAVY-NUCLEI GEV/C

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s.lective Termination of Pregnancy: About a Cas. of Anencephaly on a Bi-Chorial Twin Pregnancy

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Open Journal of Obs.etrics.and Gynecology 2018年第4期8卷 315-320页

作者： C. Ts.abu Aguemon s. Lokos.ou M. Ogoudjobi s. Kamga B. Matabis.i M. Diab M. s.nou Centre National Hos.italier et Univers.taire-HKM Cotonou Benin Centre Hos.italier Univers.taire-OP Porto-Novo Benin Center Hos.italier d’Arpajon Arpajon France

Background: The dis.overy of a lethal or dis.bling malformation requires.a thoughtful decis.on in the event of a termination of pregnancy on medical grounds. The termination of pregnancy can be s.lective in the cas. of multiple pregnancies.if a twin is.s.ffering from a s.rious.condition. Objective: To report a cas. of anencephaly on a twin pregnancy and conduct a review of literature. Cas.: This.is.a 30-year-old woman carrying a pregnancy obtained after the third attempt at in vitro fertilization (IVF) with trans.er of two embryos. No ris. factor was.found on this.pregnancy except for the twinning. The diagnos.s.was.made at 14 weeks.+1 day during firs. term ultras.und, which dis.overed an on-going bi-chorial bi-amniotic twin pregnancy, with twin B (TB) carrying a defect on his.head. A s.lective interruption was.performed on TB at 16 weeks.by cordonal injection with potas.ium chloride. The pregnancy went on without incident and with s.ontaneous.vaginal delivery of the s.cond twin at 39 weeks.of pregnancy. Des.ite the s.lective termination, the pregnancy went on without any complication. Conclus.on: Anencephaly on twin pregnancy is.a rare occurrence. In a bichorial pregnancy, a s.lective feticide can improve the ges.ational age at birth.

关键词： Anencephaly s.lective Interruption Twin Pregnancy

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Totally Umbilical s.reen Trans.ers.l Lightlike s.bmanifolds.of s.mi-Riemannian Product Manifolds

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Advances.in Pure Mathematics 2012年第4期2卷 285-290页

作者： s. M. Khurs.eed Haider Advin Mas.ih Mamta Thakur Department of Mathematics Jamia Millia Islamia New Delhi India

We s.udy totally umbilical s.reen trans.ers.l lightlike s.bmanifolds.immers.d in a s.mi-Riemannian product manifold and obtain neces.ary and s.fficient conditions.for induced connection ▽ on a totally umbilical radical s.reen trans.ers.l lightlike s.bmanifold to be metric connection. We prove a theorem which clas.ifies.totally umbilical s.-anti-invariant lightlike s.bmanifold immers.d in a s.mi-Riemannian product manifold.

关键词： s.mi-Riemannian Product Manifolds Lightlike s.bmanifolds Totally Umbilical Radical s.-Lightlike s.bmanifolds Totally Umbilical s.-Anti-Invariant Lightlike s.bmanifolds

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ON ABEL-GONTs.HAROFF-GOULD’s.POLYNOMIALs

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Analys.s.in Theory and Applications 2003年第2期19卷 166-184页

作者： HeTianxiao Leets.hC.Hs. PeterJ.s.s.iue Illinois.es.eyanUnivers.ty USA DalianUnivers.tyofTechnology China Univers.tyofNevadaLas.egas USA

In this.paper a connective s.udy of Gould's.annihilation coefficients.and Abel-Gonts.haroff polynomials.is.pres.nted. It is.s.own that Gould's.annihilation coefficients.and Abel-Gonts.haroff polynomials.are actually equivalent to each other under certain linear s.bs.itutions.for the variables. Moreover, a pair of related expans.on formulas.involving Gonts.haroff s.remainder and a new form of it are demons.rated, and als. illus.rated with s.veral examples.

关键词： annihilation coefficients Gould's.identity Abel-Gonts.haroff polynomial ring of formal power s.ries Abel-Gonts.haroff interpolation s.ries

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