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Early Paleozoic HP granulite-garnet peridotite associations in the south Altyn Tagh, NW china: Petrological and SHRIMP dating constraints

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Early Paleozoic HP granulite-garnet peridotite associations ...

2.04年全国岩石学与地球动力学研讨会

作者： J. X. Zhang, F. C. Meng and Y. S. Wan 1. Institute of Geology, CAGS beijing, 100037, P. R. china 2. Department of Geological and Environmental {2., S tanford university, Stanford, CA 94305-2.15, U. S. A)

＜正＞ Petrological investigations and SHRIMP dating were undertaken on a newly recognized HP granulite unit in the Bashiwake area of the south Altyn Tagh, western china. The HP granulite unit consists of bearing-kyanite felsic granulites, mafic granulites, sapphirine-bearing garnet clinopyroxenite and associated gamet peridotites. The predominant felsic granulites are quartz + Ternary feldspar （present perthite）-rich rocks containing various amounts of garnet, kyanite, plagioclase, biotite, rutile, spinel and corundum, and minor zircon, apatite. The mafic granulites enclosed directly in felsic granulites contain a peak assemblage of Grt + Cpxl + Ternary feldspar （now mesoperthite） + Qtz + Rt. The growth of new clinopyroxene （Cpxll）, Opx and PI in the matrix was related to decompression. The bearing-sapphirine garnet clinopyroxenite occurs as mafic layers in garnet peridotite. Petrographical data suggests a peak assemblage of Grt + Cpxl + Ky + Rt. The early kyanite is inferred by the symplectite of Spr + Cor + Pl ±Spl formed during decompression. Garnet peridotite contains an assemblage of Grt + Ol + Opx + Cpx. The fibrous kelyphites composed of Opx + Cpx + Spl around gamet suggests decompression. The peak assemblage of garnet+ kyanite +ternary feldspar + quartz in the felsic granulite give a P-T conditions of around 92.-995℃and 2..0-2..5kbar, consistent with the estimates of T = 950-102.℃and P = 18.5-2..3 kbar obtained from the peak assemblage of mafic granulite, and T = 870-1050℃and P = 18.5-2..3 kbar of garnet peridotite within error. A medium-high pressure granulite facies overprint （780-82.℃, 9.5-12.kbar） is well defined by the formation of secondary Cpxll±Opx + Pl at expense of garnet and early Cpx in the mafic graunlites, as well as by growth of Spl and PI at expense of garnet and ky in the felsic *** separated zircons from felsic granulite, sapphirine-bearing metabasites and garnet peridotite were measured on SHRIMP Ⅱiron microprobe. Most zircons are

关键词： HP granulite sapphirine-bearing garnet clinopyroxenite garnet peridotite south Altyn Tagh SHRIMP dating

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秸秆还田对农田生态系统及作物生长的影响

土壤通报 2001年第5期32卷 209-213页

作者：江永红宇振荣马永良中国农业大学资源与环境学院北京100094

秸秆还用是利用秸秆的一种有效方式．大量试验表明，秸秆还田会对土壤产生多种作用：能改善土壤物理性状，降低土壤容重，增加孔隙度；能增加土壤微生物数量，增强生物和多数酶的活性；增加土壤有机质积累和养分含量；能改变土壤腐殖质... 详细信息

秸秆还用是利用秸秆的一种有效方式．大量试验表明，秸秆还田会对土壤产生多种作用：能改善土壤物理性状，降低土壤容重，增加孔隙度；能增加土壤微生物数量，增强生物和多数酶的活性；增加土壤有机质积累和养分含量；能改变土壤腐殖质组成及特性；影响作物生长发育，促进作物产量提高．其中，秸秆覆盖还田还具有蓄水保墒，调节地温和保持水土，抑制田间杂草等功能．总之，秸秆还田对农田具有良好的生态效应。

关键词：秸秆还田秸秆覆盖农田效应作物生长农田生态系统

蛋白激酶Cα对人正常肝和肝癌细胞中Ha-ras基因表达的影响

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生物化学与生物物理进展 2002年第5期29卷 781-785页

作者：冯怡柳惠图高萍北京师范大学生命科学学院细胞增殖及调控生物学教育部重点实验室北京100875

运用基因转染技术 ,将蛋白激酶C(PKCα)cDNA正向插入的真核表达重组质粒pXJ4 1 PKCα ,导入人正常肝细胞 (L 0 2.) ,经蛋白质免疫印迹等检验 ,表明成功构建了稳定过表达PKCα的人正常肝细胞模型 (LT3) ,用LT3和表达反义PKCα的人肝癌细... 详细信息

运用基因转染技术 ,将蛋白激酶C(PKCα)cDNA正向插入的真核表达重组质粒pXJ4 1 PKCα ,导入人正常肝细胞 (L 0 2.) ,经蛋白质免疫印迹等检验 ,表明成功构建了稳定过表达PKCα的人正常肝细胞模型 (LT3) ,用LT3和表达反义PKCα的人肝癌细胞HT6为细胞模型 ,通过RT PCR ,蛋白质印迹 (Westernblot)等分析和进一步运用自行构建的真核表达质粒prasGL3,进行荧光素酶活性检测表明 :过表达PKCα可以促进L 0 2.胞的增殖速率 ,并引起Ha ras基因转录水平上升和Ha ras启动子活性升高 ;反之 ,表达反义PKCα的BEL 74 0 2.胞增殖被抑制 ,Ha ras基因转录水平下降 ,Ha ras启动子活性降低 .通过实验我们首次观察到 ,PKCα亚类对Ha ras癌基因表达的影响与其对Ha ras启动子活性的作用有关 ,PKCα可能参与了对Ha

关键词：蛋白激酶Cα 人正常肝肝癌细胞 Ha-ras 基因表达

Identifying Machine Query for an Intelligent Web Browser System

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Identifying Machine Query for an Intelligent Web Browser Sys...

2.10 IEEE 2.d Symposium on Web Society

作者： Tmgshao Zhu Graduate university of Chinese Academy of sciences {2.,china Xmguo Xu National Computer System Engineering Research Institute of china {2.,china Guohua Liu Department of Computing Science university of Alberta Edmonton,Canada

＜正＞This paper describes our research on learning browsing behavior model for predicting the current information need of a web *** inference is based on a parameterized model of how the sequence of browsing behavior indicates the degree to which page content satisfies the user’s information need,and the model parameters can be estimated using standard methods from a labelled *** from lab experiments demonstrate that the prediction model can effectively identify the information needs of new users,browsing previously unseen *** paper concludes with an overview of our WebIC which integrates the model into a web browser, to help the user find the relevant information effectively from the web.

关键词： Browsing Behavior Model Machine Learning Web Browser

Tribology properties of plasma sprayed nanostructured and conventional WC-Co coatings under water environment

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Tribology properties of plasma sprayed nanostructured and co...

Fifth International Conference on Surface Engineering

作者： Xiaoqin Zhao1 2.Jianjim Chen1 Huidi Zhou1 1 State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of sciences Lanzhou 730000 china 2.Graduate School Chinese Academy of sciences beijing 100039 china

WC-Co cermet has wide applications in machinery industries as a wear-resisitance *** fabrication of Nanostructured coatings would be more encouraging in tribological surface *** this paper,the nanostructured and conventional WC-Co coatings were depsited on 1Cr18Ni9Ti stainless steel substrate using an atmospheric plasma spray *** microstructures and tribology properties in water environment were comparatively *** was found that the as-sprayed WC-Co coating were composed of WC as the major phase and W2.,WC1-X,and W3Co3C as the minor *** nanostructured WC-Co coating had much higher hardness and more uniform *** water environment,both the nanostructured and conventional WC-Co coatings had the similar friction coefficient under the same ***,nanostructured WC-Co coating had better wear resistance than conventional WC-Co coating no matter sliding against Si3N4 ball or stainless steel *** wear mechanism of nanostructured WC-Co coating is adhesion under 2. N and brittle flake with fatigue abrasion under 150N sliding against Si3N4 ball,while when the Si3N4 ball was replaced by stainless steel ball,the friction coefficient and the wear rate were effectively reduced,and the wear mechanism was adhesion under 2. N and split by crack under 150 *** WC-Co coating was more wear-resistance than the conventional one in water environment,and the friction coefficient and wear rate could be effectively reduced when rubbing against stainless steel ball.

关键词： Plasma spraying WC-Co coating water environment tribolobgy

浅析应用型人才培养模式下开放性实践教学体系建设

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实验技术与管理 2010年第3期 209-211页

作者：李秀滢彭静王建新北京电子科技学院电子信息工程系中国科学院研究生院教务处

实践教学已经成为当前理工科高校培养应用型人才的重要方式。该文分析当前高校实践教学现状,阐述了构建能力开放性实践教学体系的是培养高素质应用型人才的需要,重点研究探讨了开放式实践教学体系的建设要点及建设方向。

关键词：实践教学体系开放式应用型人才

法治理想主义与法治现实主义——读《法治进程中的“民间治理”》有感

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法制与社会发展 2007年第6期13卷 149-156页

作者：蒋立山中国政法大学北京100084

在法治理想主义路线中,中国民间组织的法治意义被描绘成如下一幅法治秩序的生长图景:在国家与社会的合作互动中,多元化的民间组织通过协商、谈判参与立法实践,形成被共同认可的、且对国家法律有支撑和补充作用的"民间法"。法律运行方式... 详细信息

在法治理想主义路线中,中国民间组织的法治意义被描绘成如下一幅法治秩序的生长图景:在国家与社会的合作互动中,多元化的民间组织通过协商、谈判参与立法实践,形成被共同认可的、且对国家法律有支撑和补充作用的"民间法"。法律运行方式亦从全能独断式向参与、协商式转变。然而,如此一幅民间法律治理的理想图景却遭遇到现阶段中国民间组织生长艰难的挑战。与法治理想主义以理想性立场为核心的分析进路不同,法治现实主义更关注法治现实进程及其制约因素,在民间组织等相关问题上,更强调分步推进战略,谨慎寻求得近期行动的可行性及其与远期行动之间的协调与衔接。由此,在几个重要方面形成了与法治理想主义不同的理论特点。

关键词：法治理想主义法治现实主义民间组织

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当代中国选举制度若干问题分析

深圳大学学报（人文社会科学版） 2002年第1期19卷 67-73页

作者：谢宝富北京航空航天大学公共管理系北京100083

通过对有关资料的整理与分析,考察了1979年选举法与1982.及其后诸选举法修正案的差别,分析当代中国选举制度的若干缺失与不足,总结当代中国选举制度的基本特征。

关键词：选举法选举制度候选人绝对多数制相对多数制选区制多级间接选举制

Crystallization and Preliminary Crystallographic Analysis of Histone Demethylase PHF8

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Crystallization and Preliminary Crystallographic Analysis of...

第十一次中国生物物理学术大会暨第九届全国会员代表大会

作者： Lin Yu,Yang Wang,Zhongzhou Chen State Key Laboratory of Agrobiotechnology,College of Biological sciences,china Agricultural {2.,beijing 100193,china

＜正＞The reversible process of histone methylation and demethylation plays important roles of epigenetic *** example,Truncating mutations in human PHF8 gene are

关键词： Histone Demethylase PHF8 Structure Protein Crystallography