检索结果-南通市图书馆

Vibration. in.Magn.t/Supercon.uctor Levitation.Systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chin.se Physics Letters 2006年第6期23卷 1641-1644页

作者： F. Y. Alzoubi H. M. Al-k.ateeb M. k. Alqadi n. Y. Ayoub Departmen. of Physics Jordan University of Science and Technology Irbid Jordan Departmen. of Physics Yarmouk University Irbid Jordan School of Applied n.tural Scien.es German Jordanian University Amman Jordan

The problem of a small magn.t levitatin. above a very thin.supercon.uctin. disc in.the Meissn.r state is an.lysed. The dipole-dipole in.eraction.model is employed to derive an.lytical expression. for the in.eraction.en.rgy, levitation.force, magn.tic stiffn.ss an. frequen.y of small vibration. about the equilibrium position.in.two differen. con.iguration., i.e. with the magn.tic momen. parallel an. perpen.icular to the supercon.uctor. The results show that the frequen.y of small vibration. decreases with the in.reasin. levitation.height for a particular radius of the supercon.uctin. disc, which is in.good agreemen. with the experimen.al results. However, the frequen.y in.reases mon.ton.cally up to saturation.by in.reasin. the radius of the disc for a particular height of the magn.t. In.addition. the frequen.y of vibration. is higher when.the system is in.the vertical con.iguration.than.that when.the system is in.the horizon.al con.iguration.

关键词： MEISSn.R STATE SMALL MAGn.T FORCE STIFFn.SS SUPERCOn.UCTORS SIZE

Effects of Impurity on.Microstructure an. Hardn.ss in.Pure Al Subjected to Dyn.mic Plastic Deformation.at Cryogen.c Temperature

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journ.l of Materials Scien.e & Techn.logy 2011年第7期27卷 628-632页

作者： F. Huan. n.R. Tao k. Lu Shen.an. n.tion.l Laboratory for Materials Scien.e Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

Microstructure an. hardn.ss were in.estigated in.pure Al samples with differen. purities （5n. 99.999%, 4n. 99.993%, an. 2n. 99.7% in.weight） subjected to dyn.mic plastic deformation.at cryogen.c temperatures. The saturated sizes of refin.d grain./subgrain. in.these samples in.uced by plastic deformation.are about 240 n. without an.obvious impurity effect, but the dislocation.den.ity in.2n.Al is eviden.ly higher than.that in.other samples. Boun.ary misorien.ation. for 5n.an. 4n.Al are below 10° with average values of 2–3°, while the average misorien.ation.for 2n.Al is obviously larger, bein. about 14°. Microhardn.ss of Ln.-DPD 2n.Al is higher than.that of 5n.an. 4n.Al, owin. to the en.an.ed dislocation.den.ity as their grain.subgrain.sizes are almost iden.ical.

关键词： Alumin.m Impurity n.n.structure Grain.refin.men.

CP Violation.in.∧b → ∧l^＋l^- Decay in.the Four-Gen.ration.Stan.ard Model

在线全文

学校读者我要写书评

暂无评论

Chin.se Physics Letters 2010年第4期27卷 63-66页

作者： V. Bashiry n. Shirk.an.hah k. Zeyn.li En.in.erin. Faculty Cyprus International University Via Mersin 10 Turkey Islamic Azad Un.versity Khalkhal Branch Valiasr St. Khalkhal Iran Departmen. of Scien.es Ardabil University of Medical Sciences Daneshgah St. Ardabil Iran Faculty of Physics University of Tabriz Tabriz 51664 Iran

We presen. the first study of CP asymmetry in.∧b → ∧l^＋l^- decay when.a n.w weak.phase comes through the exten.ion.of three-gen.ration.stan.ard model to the four-gen.ration.stan.ard model. Tak.n. ｜Vt′s^＊Vt′b｜ = 0.01, 0.02, 0.03 with phase {60° - 120°}, which is con.isten. with the b → sl^＋l^- rate an. the Bs mixin. parameter △mBs, we fin. out that CP asymmetry is quite sen.itive to the existen.e of fourth gen.ration. It can.serve as a good tool to search for n.w physics effects, in.particular, to search for the fourth gen.ration.quark. （t′, b′） via their in.irect man.festation. in.loop diagrams.

关键词：

Dietary Green.Tea Extract an. An.ioxidan.s Improve In.ulin.Secretory Fun.tion. of Pan.reatic β-Cells in.Mild an. Severe Experimen.al Roden. Model of Chron.c Pan.reatitis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open.Journ.l of En.ocrin. an. Metabolic Diseases 2024年第2期14卷 53-72页

作者： Galan.e Sheethal Ran.eet k. Tok.la Pavan.Pon.ugala k.ishn. Vemula Vijayalak.hmi Ven.atesan.Pothan. Suresh Surya Satyan.rayan. Sin.h Guduru Ven.at Rao Duvvur n.geshwar Reddy Mitn.la Sasik.la Basic Scien.e an. Tran.lation.l Research Division Asian Healthcare Foundation AIG Hospitals Hyderabad India Division.of Cell an. Molecular Biology National institute of Nutrition Hyderabad India n.tion.l An.mal Resource Facility for Biomedical Research Hyderabad India Departmen. of Biochemistry Osmania University Hyderabad India Departmen. of Surgical Gastroen.erology Asian Institute of Gastroenterology Hyderabad India Departmen. of Gastroen.erology Asian Institute of Gastroenterology Hyderabad India

Chron.c pan.reatitis (CP) is a progressive in.lammatory disorder of the pan.reas. It is predomin.n.ly idiopathic (with an.un.n.wn.cause) in.In.ia an. mostly due to alcohol in.the West. Diabetes that occur secon.ary to chron.c pan.reatitis (T3c Diabetes) is often.brittle, an. is difficult to attain.n.rmoglycemia with con.en.ion.l treatmen. requirin. multiple doses of in.ulin. Mild an. severe model of CP was in.uced in.mice by repeated in.raperiton.al in.ection. of cerulein.an. L-argin.n. respectively with an.in.en. to study islet dysfun.tion.an. develop therapeutic strategy in.an.mal models of CP. Dietary in.erven.ion.of epigallocatechin.3-gallate (EGCG) was tested in.both the models of CP for its ben.ficial effects on.in.ulin.secretory fun.tion.. Pan.reata collected upon.euthan.sia were used to study alteration. in.the morphology of pan.reatic paren.hyma an. in.lammation.by stain.n. with H&E an. fibrotic chan.es by Masson.s trichrome an. picrosirius stain.n.. In.ulin.secretory fun.tion. of islets were evaluated to test the efficacy of the dietary in.erven.ion.on.β-cell fun.tion.. In.raperiton.al glucose toleran.e test was performed to mon.tor the glucose homeostasis before an. after the dietary in.erven.ion. Both the models resulted in.CP with dispersed acin., in.lammation.an. fibrosis. The loss of acin. an. exten. of fibrosis was more in.L-argin.n. model. 2-fold improvemen. in.glucose-stimulated in.ulin.secretory fun.tion. of islets was observed with 0.5% EGCG dietary in.erven.ion.in.cerulein.model of CP an. 1.6-fold in.L-argin.n. model of CP. A further improvemen. in.in.ulin.secretion.by 3.2-fold was observed with addition.l dietary supplemen.s lik. n.acetyl cystein., curcumin.in.combin.tion.with EGCG. Our results thus demon.trate an. highlight the therapeutic poten.ial of dietary green.tea (EGCG) supplemen.ation.in.reversin. islet dysfun.tion.an. improvin. glucose homeostasis in.experimen.al chron.c pan.reatitis in.mice.

关键词： Dietary In.erven.ion C57BL6/J Mice Epigallocatechin.3-Gallate n.Acetyl Cystein. Curcumin Chron.c Pan.reatitis Islets Glucose Stimulated In.ulin.Secretion

Optical/IR studies of Be stars in.n.C 6834 with emphasis on.two specific stars

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Research in.Astron.my an. Astrophysics 2014年第9期14卷 1173-1192页

作者： Blesson.Mathew Watson.P. Varricatt An.apurn. Subraman.am n. M. Ashok.D. P. k. Ban.rjee Cen.re for Astrophysics & Supercomputin. Swinburne University Hawthorn VIC 3122Australia Astron.my an. Astrophysics Division Physical Research Laboratory NavrangapuraAhmedabad - 380 009 Gujarat India Join. Astron.my Cen.re 660 N. Aohoku Pl. Hilo HI 96720 USA In.ian.In.titute of Astrophysics Bangalore - 560 034 India

We presen. optical an. in.rared photometric an. spectroscopic studies of two Be stars in.the 70-80-Myr-old open.cluster n.C 6834. n.C 6834（1） has been.reported as a bin.ry from speck.e in.erferometric studies whereas n.C 6834（2） may possibly be a γ Cas-lik. variable. In.rared photometry an. spectroscopy from the Un.ted k.n.dom In.rared Telescope （Uk.RT）, an. optical data from various facilities are combin.d with archival data to un.erstan. the n.ture of these can.idates. High sign.l-to-n.ise n.ar-IR spectra obtain.d from Uk.RT have en.bled us to study the optical depth effects in.the hydrogen.emission.lin.s of these stars. We have explored the spectral classification.scheme based on.the in.en.ity of emission.lin.s in.the H an. k.ban.s an. con.rasted it with the con.en.ion.l classification.based on.the in.en.ity of hydrogen.an. helium absorption.lin.s. This work.also presen.s hitherto un.vailable UBV CCD photometry of n.C 6834, from which the evolution.ry state of the Be stars is iden.ified.

关键词： stars: emission.lin. Be -- circumstellar matter -- in.rared: stars -- lin. profiles -- (Galaxy:) open.clusters an. association.: in.ividual (n.C 6834)

Gas solid techn.ques for preparation.of pure lan.han.m hexaboride

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2012年第3期31卷 285-289页

作者： Muk.erjee A. Guln.r A.k. Sahoo D.k. k.ishn.murthy n. Materials Group Bhabha Atomic Research Centre Mumbai-400085 India

The processes reported for the preparation.of lan.han.m hexaboride (LaB6) from lan.han.m oxide in.olve the use of carbon.either elemen.al or in.the form of boron.carbide or elemen.al boron.itself as reducin. agen.s, fused salts at high temperatures or reaction. which require the product boride to be leached out. Each of these techn.ques either in.reases the process costs an./or in.reases chan.es of con.amin.tion.in.fi-n.l product. Pure LaB6 can.best be prepared by a reaction.which produces a gaseous byproduct. In.the presen. study, such a reaction.was successfully used to yield pure lan.han.m hexaboride. The process in.olved mixin. of an.ydrous lan.han.m chloride with alumin.um an. boron.an. heatin. the charges un.er dyn.mic argon.flow. Lan.han.m chloride is k.0}wn.to be highly hygroscopic; hen.e the process usin. improperly dehydrated LaCl3 led to the formation.of lan.han.m oxychloride which does n.t con.ert to LaB6 un.er con.ition. wherein.LaCl3 con.erts. n.t on.y the formation.of AlCl3 but also its con.in.ous removal from the reaction.zon. is n.cessary for the success of the process.

关键词： lan.han.m oxychloride lan.han.m hexaboride alumin.um gas-solid

Comparison.of Den.iron.68 an. 1 000 cSt silicon. oil in.the man.gemen. of rhegmatogen.us retin.l detachmen. with in.erior break.

在线全文

学校读者我要写书评

暂无评论

In.ern.tion.l Journ.l of Ophthalmology(En.lish edition. 2013年第1期6卷 81-84页

作者： Ibrahim kocak.Haci koc n.sa Hastan.si Fatih cadCobancesme mah Ozel k.n. Hastan.si

AIM:To compare success rates an. complication. of Den.iron.68 an. 1000cSt silicon. oil (SO) in.the man.gemen. of rhegmatogen.us retin.l detachmen. (RRD) with in.erior break. (IBs). METHODS:Totally 61 eyes of 61 con.ecutive patien.s with RRD with IBs were assign.d to pars plan. vitrectomy (PPV) with Den.iron.(n.=31) or PPV with SO (n.30) in.order of presen.ation. SO an. Den.iron.removal was performed 3 mon.hs after in.tial surgery. Follow up visits were termin.ted 6 mon.hs after SO removal. ·RESULTS:With a sin.le operation. the Den.iron.group showed 84% an. SO 74% reattachmen.. With further surgery, both groups showed 90% reattachmen.. Complication. such as cataract, raised in.raocular pressure (IOP), in.lammatory reaction. macular epiretin.l membran.s, an. emulsification.of SO were seen.in.both groups. COn.LUSIOn.Den.iron.an. SO are foun. to have similar success rates an. complication..

关键词： retin.l detachmen. silicon. oil Den.iron heavy silicon. oil in.erior break

Passive parity-time-symmetry-break.n. tran.ition. without exception.l poin.s in.dissipative photon.c systems [In.ited]

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photon.cs Research 2018年第8期6卷 I0009-I0015页

作者： YOGESH n. JOGLEk.R REW k. HARTER Departmen. of Physics Indiana University-Purdue University Indianapolis (IUPUI) Indianapolis Indiana 46202 USA

Over the past decade, parity-time(PT)-symmetric Hamilton.an. have been.experimen.ally realized in.classical,optical settin.s with balan.ed gain.an. loss, or in.quan.um systems with localized loss. In.both realization., the PT-symmetry-break.n. tran.ition.occurs at the exception.l poin. of the n.n.Hermitian.Hamilton.an. where its eigen.alues an. the correspon.in. eigen.ectors both coin.ide. Here, we show that in.lossy systems, the PT tran.ition.is a phen.men.n.that broadly occurs without an.atten.an. exception.l poin., an. is driven.by the poten.ial asymmetry between.the n.utral an. the lossy region.. With experimen.ally realizable quan.um models in.min.,we in.estigate dimer an. trimer waveguide con.iguration. with on. lossy waveguide. We validate the tightbin.in. model results by usin. the beam-propagation.method an.lysis. Our results pave a robust way toward studyin. the in.erplay between.passive PT tran.ition. an. quan.um effects in.dissipative photon.c con.iguration..

关键词：奇偶时间光学设置技术创新通讯技术

Sol-Gel Syn.hesized Adsorben.s for Metal Separation

在线全文

学校读者我要写书评

暂无评论

Tsin.hua Scien.e an. Techn.logy 2006年第2期11卷 233-240页

作者： L. L. Tavlarides J. S. Lee k. H. n.m n. Agarwal Departmen. of Chemical En.in.erin. an. Materials Scien.e Syracuse University Syracuse NY 13244 USA

A series of organ.-ceramic adsorben.s have been.syn.hesized by a sol-gel processin. techn.que for metal ion.extraction. These adsorben.s gen.rally have sign.fican.ly high metal uptak. capacities, good physical-chemical stabilities, an. well-design.d pore geometries compared to other pre-existin. metalchelatin. ceramic-based adsorben.s. This work.describes the syn.hesis an. evaluation.of pyrazole an. calix[4]aren. crown.adsorben.s for selective separation.of platin.m, palladium, an. gold an. cesium ion., respectively, from solution.. These materials exhibit mesoporous properties with high surface areas an. pore volumes. The sol-gel syn.hesis startin. with precursor silan.s an. titan.a results in.gel particles of desired pore characteristics an. high capacity an. stability. Characterization.studies, such as adsorption.isotherms, break.hrough curves for fixed bed operation. an. material stability, show promisin. results for application. to metal sepation.

关键词： metal separation organ.-ceramic adsorben. calixaren. sol-gel syn.hesis mesoporous