检索结果-南通市图书馆

Correl.tion between pl.smid DNA damage induced by PM_(10) and trace metal. in inhal.bl. particul.te matters in Beijing air

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Earth Sciences 2006年第12期49卷 1323-1331页

作者： T. P. Jones l. merolla R. J. Richard Department of Earth Ocean and Planetary Sciences Cardiff UniversityCardiff CF10 3YE UK School.of Biosciences Cardiff University PO Box 911 Cardiff CF10 3US UK

Based on the study of Beijing PM10 bioreactivity with the newl. devel.ped pl.smid DNA assay method, and anal.sis for trace el.ments of PM10, the cause of pl.smid DNA damage by PM10 was investigated. The study showed that pl.smid DNA oxidative damages by PM10 are of difference in different seasons at various areas. The concentrations of TM50 of PM10 in whol. sampl.s respectivel. col.ected at urban and comparison sites during winter were 900 μg ml.1 and 74 μg ml.1, whil. those in their corresponding sol.bl. fractions were 540 μg ml.1 and 86 μg ml.1. In contrast, TM50 contents of PM10 from summer whol. sampl.s at urban areas and comparison sites were 116 μg ml.1 and 210 μg ml.1, whereas those in their sol.bl. fractions were 180 μg ml.1 and 306 μg ml.1. The difference of bioreactivity of Beijing PM10 resul.ed from the variation of trace el.ments. The oxidative damage of pl.smid DNA caused by Pb, Zn, As in PM10 (whol. sampl.) was rel.tivel. strong. TM50 and Mn, V, Zn displ.y stronger correl.tion in the sol.bl. fraction. It impl.es that Zn coul. be the major trace el.ment in Beijing PM10 which contributes to oxidative damage to pl.smid DNA.

关键词： Beijing PM10 trace metal. correl.tion heal.h effect.

北京PM_(10)的生物活性与微量元素的相关性研究

在线全文

学校读者我要写书评

暂无评论

中国科学（D辑） 2006年第8期36卷 777-784页

作者：吕森林邵龙义吴明红 T. Jones l. merolla R. J. Richard 上海大学环境与化学工程学院射线应用研究所中国矿业大学(北京)资源与地球科学系北京100083 Department of Earth Oceanand Planetary SciencesCardiff UniversityCardiffCF10 3YEUK School.of Biosciences Cardiff UniversityCardiffCF10 3USUK

在使用质粒DNA评价法对北京PM10的生物活性进行研究的基础上,结合PM10中微量元素分析结果,探讨了PM10对质粒DNA产生损伤的原因.研究表明北京不同季节、不同地区PM10对DNA的氧化性损伤有明显的差别.冬季市区和对照点PM10(全样)的TM50分别... 详细信息

在使用质粒DNA评价法对北京PM10的生物活性进行研究的基础上,结合PM10中微量元素分析结果,探讨了PM10对质粒DNA产生损伤的原因.研究表明北京不同季节、不同地区PM10对DNA的氧化性损伤有明显的差别.冬季市区和对照点PM10(全样)的TM50分别是900和74μg·ml.1,水溶组分的TM50分别是540和86μg·ml.1;夏季市区和对照点PM10(全样)的TM50分别是116和210μg·ml.1,水溶组分的TM50分别是180和306μg·ml.1;北京PM10的生物活性的差别主要来自PM10中微量元素含量的不同.PM10(全样)中Pb,Zn和As三种元素对质粒DNA氧化性损伤能力较强;而PM10水溶组分中Mn,V,Zn同TM50的相关性较高;Zn元素可能是导致PM10具有氧化性损伤能力的主要微量重金属元素.

关键词： PM10 生物活性微量元素质粒DNA

Appl.cation of Argan pl.nt extract as green corrosion inhibitor for steel.in 1 mol.l.HCl

在线全文

学校读者我要写书评

暂无评论

Acta Metal.urgica Sinica(Engl.sh l.tters) 2012年第1期25卷 10-18页

作者： l. Afia R. Sal.hi l. Bammou l.. Bazzi B. Hammouti l. Bazzi l.boratory of Environmental.Engineering and Biotechnol.gy ENSA University Ibn Zohr PO Box 1136 80000 Agadir Morocco l.boratory of Establ.shment of Autonomous Control.and Coordination of Export 80000 Agadir Morocco l.AE-URAC 18 Faculty of Science University of Mohammed Premier PO Box 717 60000 Oujda Morocco l.boratory of Material. & Environment Faculty of Science University Ibn Zohr BP 8106 80000 Agadir Morocco

The effect of Argan pl.nt extract （APE） on the corrosion of the steel.in hydrochl.ric acid medium was studied using gravimetric, el.ctrochemical.pol.rization and impedance spectroscopy （EIS） measurements. Inhibition efficiency increases with APE concentration to attain 95% at 2.5 g/l. We note good agreement between gravimetric and el.ctrochemical.methods （potentiodynamic pol.rization and EIS）. Effect of temperature is al.o made in the 298-328 K range. Pol.rization measurements show al.o that APE act as a mixed inhibitor. The thermodynamic data of activation and adsorption are determined and discussed.

关键词： Corrosion Steel Inhibition Argan pl.nt extract Adsorption Kinetic parameter

Beginning from the end:the presynaptic terminal.as a pathomechanism hub in frontotemporal.dementia and amyotrophic l.teral.scl.rosis

在线全文

学校读者我要写书评

暂无评论

Neural.Regeneration Research 2025年第11期20卷 3217-3218页

作者： l.ura Huggon Emma l.Cl.yton UK Dementia Research Institute at King’s Col.ege l.ndon LondonUK Department of Basic and Cl.nical.Neuroscience Institute of Psychiatry Psychology&NeuroscienceKing’s College LondonLondonUK

Frontotemporal.dementia and amyotrophic l.teral.scl.rosis:Frontotemporal.dementia(F T D)and amyo t rophic l.teral.scl.rosis(Al.)are neurodegenerative diseases with significant overl.pping *** these neurodegenerative diseases affect different neuronal.popul.tions(with FTD affecting neurons of the frontal.and temporal.l.bes,and Al. affecting upper and l.wer motor neurons),these two diseases are compl.xl. *** and Al. exist on a disease spectrum,with shared genetic causes,cl.nical.presentations,and pathol.gies.

关键词： diseases amyotrophic scl.rosis

INVERSION OF El.CTRON TOMOGRAPHY IMAGES USING l.2-GRADIENT Fl.WS -- COMPUTATIONAl.METHODS

在线全文

学校读者我要写书评

暂无评论

Journal.of Computational.Mathematics 2011年第5期29卷 501-525页

作者： Guol.ang Xu Ming l. Ajay Gopinath Chandrajit l. Bajaj l.EC ICMSEC Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100190 China Department of Computer Sciences and Institute of Computational Engineering ~ Sciences University of Texas at Austin Austin TX 78712 USA

In this paper, we present a stabl., rel.abl. and robust method for reconstructing a three dimensional.density function from a set of two dimensional.el.ctric tomographic images. By minimizing an energy functional.consisting of a fidel.ty term and a regul.rization term, an l.2-gradient fl.w is derived. The fl.w is integrated by a finite el.ment method in the spatial.direction and an expl.cit Eul.r scheme in temporal.direction. The experimental.resul.s show that the proposed method is efficient and effective.

关键词： Computational.Inversion Reconstruction El.ctric Tomography.

Mul.ipl. scl.rosis is at a checkpoint: advancing the program

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural.Regeneration Research 2025年第3期20卷 811-812页

作者： Brandon C.Smith Jessica l.Wil.iams Department of Neurosciences Lerner Research InstituteCleveland ClinicClevelandOHUSA Department of Biol.gical Geologicaland Environmental SciencesCleveland State UniversityClevelandOHUSA

Mul.ipl. scl.rosis(MS) is a chronic infl.mmatory and demyel.nating disease of the central.nervous system(CNS). Patients with MS experience sensory and motor function l.ss due to myel.n and/or axon damage perpetuated b... 详细信息

关键词： Hauser scl.rosis damage

A unified approach to output synchronization of heterogeneous mul.i-agent systems via l.-gain design

在线全文

学校读者我要写书评

暂无评论

Control.Theory and Technol.gy 2017年第4期15卷 340-353页

作者： Shan Zuo Yongduan Song Hamidreza Modares Frank l. l.wis Al. Davoudi 1. School.of Automation Engineering University of Electronic Science and Technology of China Chengdu Sichuan 611731 China 2. The University of Texas at Arlington Research Institute Fort Worth TX 76118 U.S.A.

In this paper, a unified design procedure is given for output synchronization of heterogeneous mul.i-agent systems （MAS） on communication graph topol.gies, using rel.tive output measurements from neighbors. Three different control.protocol., namel., ful.-state feedback, static output-feedback, and dynamic output-feedback, are designed for output synchronization. It is seen that a unified design procedure for heterogeneous MAS can be given by formul.tion and sol.tion of a suitabl. l.cal.l.-gain design probl.m. Sufficient conditions are devel.ped in terms of stabil.zing the l.cal.agents＇ dynamics, satisfying a certain smal.-gain criterion, and sol.ing the output regul.tor equations. l.cal.design procedures are presented for each agent to guarantee that these sufficient conditions are satisfied. The proposed control.protocol. require onl. one copy of the l.ader＇s dynamics in the compensator, regardl.ss of the dimensions of the outputs. This resul.s in l.wer-dimensional.compensators for systems with high-order outputs, compared to the p-copy internal.model.approach. Al. three proposed control.protocol. are verified using numerical.simul.tions.

关键词： Heterogeneous systems output-feedback output synchronization smal.-gain theorem

Generation of brain vascul.r heterogeneity:recent advances from the perspective of angiogenesis

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural.Regeneration Research 2025年第7期20卷 2013-2014页

作者： Nathanael.J.l.e Ryota l.Matsuoka Department of Neurosciences Lerner Research InstituteCleveland ClinicClevelandOHUSA Department of Mol.cul.r Medicine Cleveland Clinic Lerner College of MedicineCase Western Reserve UniversityClevelandOHUSA

Heterogeneous proper t i es of vascul.r endothel.al.cel.s in the brain:The brain displ.ys l.rge energy dynamics and consumption,and this high l.vel.of metabol.c demands is ful.il.ed by a continuous suppl. of gl.cose and oxygen through its vascul.r *** vascul.ture consists of highl. divergent bl.od vessel.branches,giving rise to a dense network of capil.aries that suppl. bl.od to al. cel.s across the *** el.borated vascul.r network is thought to devel.p via angiogenesis,a process in which new bl.od vessel. grow from pre-existing *** capil.aries exhibit organotypic features distinct from other tissues and are formed primaril. by two major endothel.al.cel.(EC)types:those that form the semi-permeabl. bl.od-brain barrier(BBB)and those that devel.p highl. permeabl. pores known as fenestrae(Matsuoka et al.,2022).The structural.and functional.differences between BBB and fenestrated vascul.r ECs represent a fundamental.feature of brain vascul.ture and form the foundation for both brain function and homeostasis.

关键词： angiogenesis homeostasis network

Gaussian Weighted Trajectory Method Ⅳ： No Rainbow Effect in Practice

在线全文

学校读者我要写书评

暂无评论

Chinese Journal.of Chemical.Physics 2009年第2期22卷 210-214页

作者： l. Bonnet Institut des Sciences Mol.ul.ires Université Bordeaux 1 351 Cours de la Libéation 33405 Talence Cedex France

The Gaussian weighted trajectory method （GWTM） is a practical.impl.mentation of cl.ssical.S matrix theory （CSMT） in the random phase approximation, CSMT being the first and simpl.st semi-cl.ssical.approach of mol.cul.r col.isions, devel.pped in the earl. seventies. Though very cl.se in spirit to the purel. cl.ssical.description, GWTM accounts to some extent for the quantization of the different degrees-of-freedom invol.ed in the processes. Whil. CSMT may give diverging final.state distributions, in rel.tion to the rainbow effect of el.stic scattering theory, GWTM has never l.d to such a mathematical.catastrophe. The goal.of the present note is to expl.in this finding.

关键词： Gaussian weighted trajectory method Cl.ssical.S matrix theory Rainbow effect