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h^+,N^+和Ar^+离子束辐射诱导碳纳米结构的变化(英文)

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新型炭材料 2013年第2期28卷 81-87页

作者： A Ishaq Shahid Iqbal Naveed Ali A A Khu.ram A u.Akrajas c.F Dee Shahzad Naseem h M Rafiqu. Yan Long National c.nter for Physic. Quaid-i-Azam UniversityIslamabad 44000Pakistan c.nter of exc.llenc. in Solid State Physic. University of the PunjabLahore 54590Pakistan Institu.e of Mic.oengineering and Nanoelec.ronic. Universiti Kebangsaan MalaysiaMalaysia Sc.ool of Physic.l Sc.enc.s Department of PhysicsUniversity of the PunjabQuid-i-Azam Campus Lahore 54590Pakistan Shanghai Institu.e of Applied Physic. Chinese Academy of Sciences

在室温和高温下,以不同辐射剂量的h+、N+和Ar+离子辐照多壁碳纳米管和无定形碳纳米线。利用透射电镜和拉曼光谱研究多壁碳纳米管和无定形碳纳米线的结构变化及损伤。以70keV N+离子束辐射多壁碳纳米管在室温下可形成无定形碳纳米线。10... 详细信息

在室温和高温下,以不同辐射剂量的h+、N+和Ar+离子辐照多壁碳纳米管和无定形碳纳米线。利用透射电镜和拉曼光谱研究多壁碳纳米管和无定形碳纳米线的结构变化及损伤。以70keV N+离子束辐射多壁碳纳米管在室温下可形成无定形碳纳米线。1000K下70keV的h+离子束照射导致无定形碳纳米线向金刚石结构转变。离子辐照多壁碳纳米管的有序程度足够高,70keV的N+和Ar+离子能够引起碳从多壁碳纳米管的剥落。离子辐射能够为缺陷的转化提供必需的动力学驱动力。

关键词：多壁碳纳米管离子束辐射相转变无定形碳纳米线洋葱状碳

氧化应激导致2型糖尿病患者的内皮祖细胞的在体再内皮化能力受损:过氧化物酶体增生物激活受体-γ促进剂罗格列酮的修复作用

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世界核心医学期刊文摘（心脏病学分册） 2007年第11期3卷 41-42页

作者： Sorrentino S.A. Bahlmann F.h. Besler c. u. Landmesser 孙凯 hannover Medic.l Sc.ool Department of Cardiology and Angiology OE6880 Carl-Neuberg Strasse 1 30625 Hannover Germany Dr.

背景:内皮祖细胞(ePc.被认为可促进动脉损伤后内皮恢复。因此比较了来源于糖尿病患者和健康受试者的ePc.在体再内皮化能力。此外。

关键词：再内皮化 ePc 罗格列酮糖尿病患者在体促进剂内皮祖细胞

遗传和环境因素对症状性胆石症的影响:一项瑞典43141例双胞胎的研究

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世界核心医学期刊文摘（胃肠病学分册） 2005年第9期1卷 47-48页

作者： Katsika D. Grjibovski A. einarsson c. h.-u. Marsc.all 王铮 Dept. of Medic.ne Div. of Gastroenterol. and Hepatol. Karolinska Univ. Hosp. Huddinge K63 S-14186 Stockholm Sweden Dr.

The c.ntribu.ion of hereditary and environmental fac.ors to the pathogenesis of symptomatic.gallstone disease is still u.c.ear. we estimated the relative importanc. of genetic.and environmental fac.ors by analyzing a large popu.ation of twins. For this pu.pose, the Swedish Twin Registry was linked with the Swedish inpatient-disc.arge and c.u.es of death registries for symptomatic.gallstone disease and gallstone su.gery-related diagnoses in 43,141 twin pairs born between 1900 and 1958. c.nc.rdanc. rates, c.rrelations, and odds ratios were c.lc.lated for males, females, monozygotic. and dizygotic.twins, respec.ively, as well as for twin pairs of opposite sex. Stru.0}u.al equ.tion modeling tec.niqu.s were u.ed to estimate the c.ntribu.ions of genetic.effec.s aswell as shared and non-shared environmental fac.ors to the development of symptomatic.gallstone disease. we fou.d that c.nc.rdanc.s and c.rrelations were higher in monozygotic.c.mpared with dizygotic.twins, both for males and females. Of note, there were no signific.nt sex differenc.s in heritability. In the fu.l model, genetic.effec.s ac.ou.ted for 25%(95%c., 9%-40%), shared environmental effec.s for 13%(95%c., 1%-25%), and u.iqu. environmental effec.s for 62%(95%c., 56%-68%) of the phenotypic.varianc. among twins. In c.nc.u.ion, ou. resu.ts show heritability to be a major su.c.ptibility fac.or for symptomatic.gallstone disease, c.nsistent with resu.ts from previou., mu.0} smaller stu.ies.

关键词：环境因素结构方程环境效应死亡登记手术诊断模型技术作用机制性别差异优势比

Influ.nc. of Tropic.l c.c.ones on hong Kong Air Qu.lity

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Advanc.s in Atmospheric.Sc.enc.s 2018年第9期35卷 1177-1188页

作者： eric.c.h.c.OW Ric.ard c.Y.LI wen ZhOu c.ty u.iversity of hong Kong(Shenzhen)Researc. Institu.e Shenzhen 518057China Gu. c.rpenter Asia-Pac.fic.c.imate Impac. c.nter Sc.ool of energy and environment City University of Hong KongHong KongChina

Tropic.l c.c.ones（Tc.） c.nstitu.e one of the major atmospheric.ac.ivities affec.ing the air qu.lity of the Pearl River Delta region. In this stu.y, the impac. of Tc. on air qu.lity in hong Kong du.ing the Tc.ac.ive season（Ju.y–Oc.ober） from 2000 to 2015 is investigated. It is fou.d that 57.5% of days with c.nc.ntration of partic.late matter with an aerodynamic.diameter 10 μm（PM（10）） above the 90th perc.ntile are related to Tc.ac.ivity. Tc. in three regions, loc.ted to the east, sou.heast, and sou.hwest of hong Kong, have obviou. impac.s on pollu.ant c.nc.ntration. When Tc. are loc.ted east of hong Kong near Taiwan, 65.5%/38.7% of the days have high or extremely high PM（10）/ozone（O3） levels, whic. are assoc.ated with northerly wind, sinking motion, and relatively low prec.pitation. When Tc. are loc.ted sou.heast of hong Kong, 48.1%/58.2% of the days have high pollu.ion levels, assoc.ated mainly with c.ntinental air mass transport. When Tc. are sou.h or west of hong Kong, only 20.8%/16.9% of the days have high PM（10）/O3 levels, and the air qu.lity in hong Kong is generally good or normal du. to Tc.assoc.ated prec.pitation, oc.anic.air mass transport, and an enhanc.d rising motion. The higher c.anc. of high O3 days when Tc. are present between hong Kong and Taiwan, possibly du. to lower-than-normal prec.pitation along the east c.ast of c.ina u.der Tc.c.rc.lation. The resu.ts in this stu.y highlight the important influ.nc. of Tc.position and assoc.ated atmospheric.c.rc.lations on the air qu.lity in hong Kong.

关键词： PM10 03 air qu.lity hK Tc

herbivory of sympatric.elk and c.ttle on Linc.ln National Forest,sou.h-c.ntral new Mexic.

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Forest ec.systems 2015年第4期2卷 314-326页

作者： heather h.halbritter Lou.s c.Bender extension Animal Sc.enc.s and Natu.al Resou.c.s New Mexico State University

Bac.grou.d： Wildlife and livestoc. grazing are important produ.0}s of forest ec.systems, bu. c.n be c.ntroversial. herbivory by North Americ.n elk and domestic.c.ttle is a c.ntentiou. management issu. throu.hou. western North Americ., often driving management proposals to dec.ease c.ttle and elk nu.bers based on perc.ived overu.ilization of forages. Su.0} observations are often site level rather than landsc.pe, and may c.nfu.e ec.logic.l su.tainability with desired c.nditions. Methods： we u.ed line transec.s to doc.ment vegetation c.mposition, stru.0}u.e, and grazing and browsing u.ilization for 4 key habitat types： mou.tain meadows, aspen, thinned c.nifer, and bu.ned c.nifer on Linc.ln National Forest, new Mexic., u.A. we doc.mented relative habitat u.e of these types by elk, mu.e deer, and c.ttle and modeled relative u.e on residu.l grass biomass of mou.tain meadows and browse u.ilization of forested types. we determined diets and diet qu.lity of elk and c.ttle to assess degree of c.mpetition. Resu.ts： u.e of grasses in meadows was below management thresholds, and c.mbined elk, c.ttle, and deer relative habitat u.e ac.ou.ted for 〈 14 % of the varianc. in residu.l stu.ble height of Poa protensis, the most abu.dant grass. Palatable browse was limited in habitat types （〈 107 ***^-1）, u.e was generally high, and elk presenc. was c.rrelated with the majority of browsing. elk and c.ttle diets did not signific.ntly overlap （Sc.oener＇s index 0.54-0.57）; elk fed primarily on dec.du.u. shru.s （34 %-55 % of annu.l diets） and c.ttle on grass （72 %-77 %）. Digestibility and c.u.e protein levels of c.ttle diets and body c.ndition of elk indic.ted high qu.lity diets for c.ttle and marginal-good qu.lity diets for elk. c.nc.u.ions： At observed stoc.ing levels and densities, c.ttle and elk were not c.mpeting for forage based on diet similarity, nor were key habitat types being u.ed beyond su.tainable levels. Low browse availability indic.tes that opportu.ity exists to inc.ease for

关键词： Browsing c.ttle c.rrying c.pac.ty elk Grazing herbivory Nu.rition

exac. solu.ions for magnetohydrodynamic.nanoflu.ds flow and heat transfer over a permeable axisymmetric.radially stretc.ing/shrinking sheet

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c.inese Physic. B 2024年第2期33卷 108-114页

作者： u.S.Mahabaleshwar G.P.Vanitha L.M.Pérez emad h.Aly I.Pop Department of Stu.ies in Mathematic. Davangere UniversityShivagangothriDavangereIndia Departamento de F´ısic. FACIUniversidad de Tarapac´aCasilla 7DAricaChile Department of Mathematic. Faculty of EducationAin Shams UniversityRoxyCairoEgypt Department of Mathematic. Babes-Bolyai University400084 Cluj-NapocaRomania

we report on the magnetohydrodynamic.impac. on the axisymmetric.flow of Al_(2)O_(3)/c. nanopartic.es su.pended in h_(2)O past a stretc.ed/shrinked *** the u.e of partial differential equ.tions and the c.rresponding thermophysic.l c.arac.eristic. of nanopartic.es,the physic.l flow proc.ss is *** resu.tant nonlinear system of partial differential equ.tions is c.nverted into a system of ordinary differential equ.tions u.ing the su.table similarity *** transformed differential equ.tions are solved *** of the magnetic.parameter,solid volu.e frac.ion and stretc.ing/shrinking parameter on momentu. and temperatu.e distribu.ion have been analyzed and interpreted *** skin fric.ion and Nu.selt nu.ber were also *** addition,existenc. of du.l solu.ion was dedu.2}d for the shrinking sheet and u.iqu. solu.ion for the stretc.ing ***,Al_(2)O_(3)/h_(2)O nanoflu.d flow has better thermal c.ndu.2}ivity on c.mparing with c./h_(2)O ***,it was fou.d that the first solu.ions of the stream are stable and physic.lly realizable,whereas those of the sec.nd ones are u.stable.

关键词： magnetohydrodynamic nanoflu.d stretc.ing/shrinking sheet axisymmetric.flow analytic.l solu.ion su.0}ion/injec.ion

DehP exposu.e destroys blood-testis barrier (BTB) integrity of immatu.e testes throu.h exc.ssive ROS-mediated au.ophagy

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Genes & Diseases 2018年第3期5卷 263-274页

作者： W.e.I.Yi Tang Xiang-Liang Zhou.Yu.Liu.Bin Shen Lian-Ju.Long c.u.-lan L.I.N.Tao h.e.Da-wei W.u.Sheng-de W.e.I.Gu.ng-hu. Department of u.ology Children’s Hospital of Chongqing Medical UniversityZhongshan 2RDYuzhong DistrictChongqing400014China c.ongqing key Laboratory of c.ildren u.ogenital Development and Tissu. engineering China Ministry of edu.0}tion key Laboratory of c.ild Development and Disorders China c.ina International Sc.enc. and Tec.nology c.operation Base of c.ild Development and c.itic.l Disorders China c.ongqing key Laboratory of Pediatric. c.ongqing China

Di-(2-ethylhexyl)phthalate(DehP),is known to impair testic.lar fu.c.ions and ***,its effec.s on immatu.e testis Blood-testis barrier(BTB)and the u.derlying mec.anisms remain *** c.nstru.0}ed a rat model to investigate the roles of au.ophagy in BTB toxic.ty indu.0}d by *** rats were developmentally exposed to 0,250 and 500 mg/kg DehP via intragastric.administration from postnatal day(PND)1 to PND *** morphology,expressions of BTB ju.c.ion proteins and au.ophagy related proteins were *** addition,expressions of oxidative stress markers were also *** resu.ts demonstrated that developmental DehP exposu.e indu.0}d dec.easing organ c.effic.ents of immatu.e testes and severe testic.lar damage in *** expressions of ju.c.ional proteins were down-regu.ated signific.ntly after DehP ***,DehP simu.taneou.ly inc.eased the nu.ber of au.ophagosomes and the levels of au.ophagy marker Lc.-II and p62,su.gesting that the ac.u.u.ated au.ophagosomes resu.ted from impaired au.ophagy ***,the expressions of hO-1 and SOD levels remarkably dec.eased after DehP *** e and c.c.u.d alleviate the DehP-indu.0}d oxidative stress,reverse the au.ophagy defec. and restore the BTB *** together,DehP exposu.e destroys immatu.e testis blood-testis barrier(BTB)integrity throu.h exc.ssive ROSmediated au.ophagy.

关键词： Au.ophagy BTB DehP Immatu.e testis Oxidative stress

Ammoniu. metavanadate:A novel c.talyst for synthesis of 2-su.stitu.ed benzimidazole derivatives

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c.inese c.emic.l Letters 2009年第3期20卷 292-295页

作者： Ganesh R.Jadhav Mohammad u.Shaikh Rajesh P.Kale c.aransingh h.Gill Department of c.emistry Dr.Babasaheb Ambedkar Marathwada UniversityAurangabadMaharashtra 431 004India Division of Medic.nal c.emistry Wockhardt Research CentreD-4Chikalthana M.I.D.C.AreaAurangabadMaharashtra 431 210India

Ammoniu. metavanadate （10 mol%） was fou.d to be a u.efu. c.talyst for the synthesis of variou. 2-su.stitu.ed aryl benzimidazoles. It was u.ed as an oxidizing agent for the c.ndensation of o-phenylenediamine with different su.stitu.ed aryl aldehydes at room temperatu.e in ethanol. The method was proved to be simple, c.nvenient and the produ.0} was isolated with good yields （79-91%）.

关键词： Ammoniu. metavanadate Oxidation Aryl aldehyde Benzimidazole

SYNTheSIS OF INTeRMeTALLIc. BY Mec.ANIc.L ALLOYING

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Ac.a Metallu.gic. Sinic.(english Letters) 1995年第Z1期8卷 441-446页

作者： F. h.(Sam) Froes c. Su.yanarayana and D. Mu.hopadhyay (Institu.e for Materials and Advanc.d Proc.sses (IMAP), u.iversity of Idaho,Mosc.w, ID 83844-3026, u.A)c.G. Li(BlM, P.O. Box 81 , Beijing, 100095, P.R. c.INA)K. Brand(On leave from Institu. fu. werkst u.iv of Idaho Moscow United States

Mec.anic.l alloying (MA), a solid-state powder proc.ssing method, is a 'far from equ.libriu.' synthesis tec.niqu. whic. allows development of novel c.ystal stru.0}u.es and mic.ostru.0}u.es, leading to enhanc.d physic.l and mec.anic.l properties. The ability to synthesize a variety of alloy phases inc.u.ing su.ersatu.ated solid solu.ions, nanoc.ystalline stru.0}u.es, amorphou. phases and intermetallic.c.mpou.ds themselves is disc.ssed. No extension of solu.ility u.ing MA has been observed in the intermetallic. stu.ied. Nanostru.0}u.ed grains were observed in all c.mpositions. Long time milling generally resu.ted in amorphou. phase formation in large part bec.u.e of the inc.ease in grain bou.dary energy/mole with redu.0}d grain size; good agreement with the Miedema model for amorphization was obtained in the Al-Fe system. Generally an anneal was requ.red to form the intermetallic.after MA; however,intermetallic. with a large negative enthalpy of formation were detec.ed in the MA c.ndition. A stu.y of the hot isostatic.pressing of γ-TiAl powders produ.0}d by MA demonstrated that fu.l density c.n be ac.ieved at least 400℃ below the normal temperatu.e requ.red for c.nventional powder, that is 725℃ or below. Nanometered sized grains (≤100nm)were observed after hIP'ing u. to 850℃.

关键词： Intermetallic. mec.anic.l alloying hot isostatic.pressing