检索结果-南通市图书馆

Sm-Nd systematics of metaultramafic-mafic rocks from the Arroio Grande Op.iolite(Brazil): Insights on the evolution of the South Adamastor p.leo-ocean

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Geoscience Frontiers 2020年第6期11卷 2287-2296页

作者： Rodrigo Chaves Ramos Edinei Koester daniel Triboli Vieira p.ograma de p.s-Graduação Em Geociências Instituto de GeociênciasUniversidade Federal Do Rio Grande Do Sul.PO Box 1500191501-970Porto AlegreRSBrazil Dep.rtamento de Geologia Universidade Federal Do Rio Grande Do Sul.Bento Gonçalves Avenue950091540-000Porto AlegreRSBrazil

In this contribution we p.esent new insights on the evolution of the Dom Feliciano Belt,southernmost Mantiqueira p.ovince,integrating new whole-rock Sm-Nd isotop.c data for the Arroio Grande Op.iolite(p.nta del Este Terrane,Brazil/Uruguay border)with p.eviously p.blished bulk-rock and isotop. geochemistry of the South Adamastor p.leo-ocean metamafic rocks located in Uruguay(p.so del Dragon Comp.ex,p.nta del Este Terrane)and Namibia(Chameis Subterrane,Marmora Terrane,Gariep.Belt).For the regional geology,the new data corroborate p.evious hyp.thesis and demonstrate the dep.eted mantle features of the amp.ibolites and metagabbros of the studied *** Arroio Grande Op.iolite rocks are comp.red with its Uruguayan and Namibian counterp.rts,demonstrating their isotop.c and geochemical similarities and differences,and the backarc affinity of the South Adamastor *** MORB-affinity amp.ibolites from the Arroio Grande Op.iolite-p.so del Dragon Comp.ex are,so far,the most juvenile rocks in the eastern sector of the Dom Feliciano Belt,yielding εNd(640)Ma)between+7.3 and+9,and high 147Sm/144Nd(>0.169)and 143Nd/144Nd(640 Ma)ratios(0.51219-0.51229).The South Adamastor is interp.eted in this p.p.r as an internal back-arc ocean,with limited lateral extension,op.ned at around 750-650 Ma as the result of the closure of the older Charrua-Goianide p.leoocean during the Brasiliano/p.n-African orogenic cycle and final configuration of the West Gondwana p.leocontinent.

关键词： West Gondwana Brasiliano orogenic cycle Adamastor ocean

Molecular rotor based on an oxidized resorcinarene

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Organic Chemistry Frontiers 2022年第1期9卷 39-50页

作者： daniel T.p.yne Jan Labuta Zdeněk Futera Václav Březina Lenka Hanyková Mandeep.K.Chahal Jonathan p.Hill International Center for Materials Nanoarchitectonics National Institute for Materials ScienceNamiki 1-1TsukubaIbaraki 305-0044Japan bInternational Center for Young Scientists National Institute for Materials ScienceNamiki 1-1TsukubaIbaraki 305-0044Japan Institute of p.ysics Faculty of ScienceUniversity of South BohemiaBranišovská1760ČeskéBudějovice 37005Czech Republic Faculty of Mathematics and p.ysics Charles UniversityV Holešovičkách 218000 Prague 8Czech Republic

Molecular rotors are an imp.rtant class of dynamic molecules which have been studied not only for their p.ssible uses as comp.nents of molecular machines but also because of p.tential ap.lications as p.obes of local viscosity in biological media,esp.cially self-assembled *** the former,factors affecting rotational motility are critical while for the latter the rotor activity must be comp.exed with an outp.t signal(often fluorescence)for rep.rting of local *** single stator-double rotor activity of an oxidized resorcinarene(fuchsonarene)macrocycle containing unsaturated hemiquinonoid group. at its meso p.sitions was *** contain two hemiquinonoid substituents at diagonally-op.osed meso-p.sitions with two electron rich p.enol group. at the remaining meso-p.sitions between the hemiquinonoid *** meso-substituents are in p.oximity at one side of the resorcinarene macrocycle(so-called rccc-typ. isomer)with rotational activity of the p.enol *** rates of the p.enol moieties can be controlled by varying temp.rature,solvent p.larity and acidity of the medium of study with rotation being thermally activated in neutral and acidic media and tunable in the range from 2 s^(−1) to 20000 s^(−1).Exp.rimental and comp.tational data indicate that rotation of the mobile p.enol meso-substituents is remotely affected by interactions with acidic solvents at the carbonyl CvO group. of macrocyclic acetyloxy group.,which occurs with the emergence of a lower energy electronic absorp.ion band whose intensity is correlated with both the acidity of the medium and the rotation rate of the p.enol ***-dep.ndent DFT calculations suggest that the low energy band is due to a molecular conformational adjustment affecting electronic conjugation caused by strong interaction of macrocyclic acetyloxy carbonyl group. with the acid *** work p.esents a molecular mechanical model for estimating solution acidity a

关键词： substituent rotation oxidized

Homocysteine induces p.oduction of monocyte chemoattractant p.otein-1 and interleukin-8 in cultured human whole blood

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta p.armacologica Sinica 2004年第11期 35-41页

作者： daniel G REMICK Ann Arbor Dep.rtment of p.thology University of Michigan Medical School MI 48109 USA

AIM: To investigate whether increased p.asma L-homocysteine (Hcy) level could p.omote monocyte chemoattractant p.otein-1 (MCp.1) and interleukin-8 (IL-8) in cultured whole blood. METHODS: Human whole blood or different typ. of p.rip.eral blood cells from health volunteers were incubated with Hcy and/or the inhibitors. MCp.1 and IL-8 level were measured by ELISA assay. RESULTS: Hcy 10-1000μmol/L induced p.oduction of MCp.1 and IL-8 in cultured human whole blood (p.0.05). The major cellular source of these chemokines corned from monocytes. Meanwhile,Hcy also p.omoted the up.egulation of Mp. level even at the 10 μmol/L in the cultured whole blood. The intracellular ROS, p.rticular the OH’ radicals, p.ay extremely imp.rtant role in the Hcy-induced MCp.1 and IL-8 p.oduction. CONCLUSION: Increased Hcy level in p.asma (hyp.rhomocysteinemia) induced MCp.1 and IL-8 secretion in cultured human whole blood, esp.cially in monocytes via oxidative stress mechanism.

关键词： atherosclerosis monocyte chemoattractant p.otein-1 interleukin-8 homocysteine monocytes

Multifunctional antimicrobial chlorhexidine p.lymers by remote p.asma assisted vacuum dep.sition

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2019年第2期13卷 330-339页

作者： Ana Mora-Boza Francisco J.Ap.ricio Maria Alcaire Carmen Lóp.z-Santos Juan p.Esp.nós daniel Torres-Lagares Ana Borrás Angel Barranco Consejo Sup.rior de Investigaciones Cientificas. Instituto de Ciencia de Materiales de Sevilla (CSIC-Universidad de Sevilla) c/Americo Vesp.cio 49 41092 SevillaSpain Facultad de Odontologia Universidad de Sevilla (USE) c/Avicena41009 SevillaSpain

Novel antibacterial materials for imp.ants and medical instruments are essential to develop.p.actical strategies to stop.the sp.ead of healthcare associated infections. This study p.esents the synthesis of multifunctional antibacterial nanocoatings on p.lydimethylsiloxane (p.MS) by remote p.asma assisted dep.sition of sublimated chlorhexidine p.wders at low p.essure and room temp.rature. The obtained materials p.esent effective antibacterial activity against Escherichia coli K12, either by contact killing and antibacterial adhesion or by biocide agents release dep.nding on the synthetic p.rameters. In addition, these multifunctional coatings allow the endure hydrop.ilization of the hydrop.obic p.MS surface, thereby imp.oving their biocomp.tibility. Imp.rtantly, cell-viability tests conducted on these materials also p.ove their non-cytotoxicity, op.ning a way for the integration of this typ. of functional p.asma films in biomedical devices.

关键词： p.asma p.lymers conformal p.asma dep.sition chlorhexidine bactericide p.MS biocomp.tibility

Windsurfing vs kitesurfing:Injuries at the North Sea over a 2-year p.riod

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Orthop.dics 2016年第12期7卷 814-820页

作者： Christiaan JA van Bergen Joris p.Commandeur Rik IK Weber daniel Haverkamp.Roelf S Breederveld Dep.rtment of Orthop.edic Surgery Spaarne Gasthuis Dep.rtment of Surgery Luzerner Kantonsspital Dep.rtment of Orthop.edic Surgery Slotervaartziekenhuis Dep.rtment of Trauma Surgery Red Cross Hospital

AIM To analyze all windsurfing and kitesurfing(kiteboarding) injuries p.esented at our coastal hosp.tal over a 2-year p.riod. METHODS Twenty-five windsurfers(21 male; aged 31 ± 8 years) and 32 kitesurfers(23 male; aged 29 ± 11 years) p.esented at our hosp.tal during the 2-year study p.riod. Various injury data were recorded,including transp.rt to hosp.tal and treatment. After a median follow-up.of 16 mo(range,7-33 mo),18 windsurfers(72%) and 26 kitesurfers(81%) comp.eted questionnaires on the trauma mechanisms,the use of p.otective gear,time sp.nt on windsurfing or kitesurfing,time to return to sp.rts,additional injuries,and chronic disability. RESULTS Most p.tients sustained minor injuries but severe injuries also occurred,including vertebral and tibial p.ateau fractures. The lower extremities were affected the most,followed by the head and cervical sp.ne,the up.erextremities,and the trunk. The injury rates were 5.2 p.r 1000 h of windsurfing and 7.0 p.r 1000 h of kitesurfing(p.= 0.005). The injury severity was the same between group.(p.= 1.0). Less than 30% of the study p.p.lation used p.otective gear. Kitesurfers had a higher number of injuries,and required transp.rt by ambulance,inp.tient hosp.tal stay and op.rative treatment more often than windsurfers,but these differences were not statistically significant(p.> 0.05). The median time to return to windsurfing and kitesurfing was 5 and 4 wk,resp.ctively(p.= 0.79). Ap.roximately one-third of the p.tients in each group.exp.rienced chronic *** Kitesurfing results in a significantly higher injury rate than windsurfing in the same environmental conditions but the severity of the injuries does not differ.

关键词： General sp.rts trauma Extreme sp.rts Surfing Ep.demiology p.evention

Role of selenium in typ. 2 diabetes,insulin resistance and insulin secretion

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Diabetes 2023年第3期14卷 147-158页

作者： p.lar Casanova daniel Monleon Dep.rtment of p.thology University of ValenciaValencia 46010Spain

Selenium is a trace mineral essential for life that acts p.ysiologically through *** other actions,the endogenous antioxidant selenop.otein glutathione p.roxidase and the selenium transp.rter in blood,selenop.otein p.seem to p.ay an imp.rtant role in typ. 2 diabetes mellitus and insulin resistance by weakening the insulin signaling cascade through different *** findings also suggest that selenop.oteins also affect insulin biosynthesis and insulin *** review discussed the role of selenium in typ. 2 diabetes and the comp.ex interp.ay between selenop.oteins and insulin p.thways.

关键词： Selenium Diabetes Insulin resistance Metabolism Antioxidants

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

监管、通胀与黄金货币

中国贵金属 2010年第7期 83-88页

作者： daniel p. Collins 文辉（编译）不详长城伟业期货

弗兰克·麦吉（FrankMcGhee）是安联金融（Alliance Financial）的首席贵金属交易员，拥有超过30年的贵金属期货和现货市场的交易经验。麦吉也是联合经纪服务公司（Integrated Brokerage Services）的风险管理主管和运营经理。自1976年... 详细信息

弗兰克·麦吉（FrankMcGhee）是安联金融（Alliance Financial）的首席贵金属交易员，拥有超过30年的贵金属期货和现货市场的交易经验。麦吉也是联合经纪服务公司（Integrated Brokerage Services）的风险管理主管和运营经理。自1976年以来，麦吉一直是贵金属交易员和自营操盘手。他也是Alliance Financial的基于网络浏览器的现货交易系统***的首席系统设计师。

关键词： Alliance 交易系统监管货币黄金现货市场网络浏览器贵金属

Syntheses of Coordination Comp.unds of 2-Amino-3-Methylbutanoic Acid Their Mixed Ligand Comp.exes and Antibacterial Activities

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Biological Chemistry 2020年第3期10卷 67-85页

作者： Temitayo O. Aiyelabola Iyanuoluwa E. Okunade Johan H. L. Jordaan daniel p. Otto Dep.rtment of Chemistry Obafemi Awolowo University Ile-Ife Osun State Nigeria Research Focus Area for Chemical Resource Beneficiation Laboratory for Analytical Services North-West University Potchefstroom South Africa

Coordination comp.unds of 2-amino-3-methylbutanoic acid were synthesized with chromium(III) and oxovanadium(IV) ions. M:L;1:2. Adducts of these comp.exes using 1,10-p.enantroline and ethylenediamine were further synth... 详细信息

Coordination compounds of 2-amino-3-methylbutanoic acid were synthesized with chromium(III) and oxovanadium(IV) ions. M:L;1:2. Adducts of these complexes using 1,10-phenantroline and ethylenediamine were further synthesized, M:L, (1:2). These compounds were characterized using electronic, infra-red spectrophotometry, magnetic susceptibility measurement and percentage metal analyses. The zones of inhibition and minimum inhibitory concentrations of the compounds against eight microbes were studied. The results obtained indicated an octahedral geometry for the Cr(III) complexes, indicative of additional coordination of two water molecules. On the other hand a square pyramid geometry was obtained for the binary oxovanadium complex and its 1,10-phenantroline adduct. However,p.n>p.n> for the oxovanadium ethylenediamine adduct a distorted octahedral geometry was proposed. The result for the antibacterial studies indicated that both mixed ligand complexes of 1,10-phenantroline exhibited good antibacterial activity, and in some cases better activity than the standard, streptomycin.p.n>p.n>

关键词： Coordination Comp.unds 2-Amino-3-Methylbutanoic Acid Mixed Ligand Comp.exes Minimum Inhibitory Concentration 1 10-p.enantroline Ethylenediamine

A Moving p.eudo-Boundary MFS for Three-Dimensional Void Detection

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Ap.lied Mathematics and Mechanics 2013年第4期5卷 510-527页

作者： Andreas Karageorghis daniel Lesnic Liviu Marin Dep.rtment of Mathematics and Statistics University of CyprusP.O.Box 205371678 NicosiaCyprus Dep.rtment of Ap.liedMathematics University of LeedsLeeds LS29JTUK Institute of SolidMechanics Romanian Academy15 ConstantinMilleP.O.Box 1-863010141 Bucharestand Centre for Continuum MechanicsFaculty of Mathematics and Computer ScienceUniversity of Bucharest14 Academiei010014 BucharestRomania

We p.op.se a new moving p.eudo-boundary method of fundamental solutions(MFS)for the determination of the boundary of a three-dimensional void(rigid inclusion or cavity)within a conducting homogeneous host medium from overdetermined Cauchy data on the accessible exterior *** algorithm for imaging the interior of the medium also makes use of radial sp.erical p.rametrization of the unknown star-shap.d void and its centre in three *** also include the contraction and dilation factors in selecting the fictitious surfaces where the MFS sources are to be p.sitioned in the set of unknowns in the resulting regularized nonlinear leastsquares *** feasibility of this new method is illustrated in several numerical examp.es.

关键词： Void detection inverse p.oblem method of fundamental solutions