检索结果-南通市图书馆

收缩压干预试验中不同种族和民族间临床结局:一项随机临床试验

在线全文

学校读者我要写书评

暂无评论

中华高血压杂志 2018年第10期26卷 998-998页

作者： Still CH Rodriguez CJ Wright JT Jr Craven TE Bress AP Chertow GM Whelton PK Whittle JC Freedman BI Johnson KC Foy CG He J kostis jb Lash JP Pedley CF Pisoni R Powell JR Wall BM 陈云叶鹏

收缩压干预试验（systolic blood pressure intervention trial，SPRINT）结果显示，与降压目标≤140mmHg（标准治疗组）相比，以目标收缩压≤120mmHg的强化治疗更能减少心血管事件的发生；然而，目前尚不清楚是否在所有种族／族群间都... 详细信息

收缩压干预试验（systolic blood pressure intervention trial，SPRINT）结果显示，与降压目标≤140mmHg（标准治疗组）相比，以目标收缩压≤120mmHg的强化治疗更能减少心血管事件的发生；然而，目前尚不清楚是否在所有种族／族群间都有相似的效应。

关键词：干预试验随机临床试验收缩压临床结局种族民族心血管事件降压目标

THE DEFECT ITERATION OF THE FINITE ELEMENT FOR ELLIPTIC BOUNDARY VALUE PROBLEMS AND PETROV-GALERKIN APPROXIMATION

在线全文

学校读者我要写书评

暂无评论

Journal of Computational Mathematics 1998年第2期16卷 152-164页

作者： Gao, jb Yang, YD Shih, TM Huazhong Univ Sci & Technol Dept Math Wuhan 430074 Peoples R China Guizhou Normal Univ Dept Math Guiyang 550001 Peoples R China Hong Kong Polytech Univ Dept Math Appl Hong Kong Peoples R China

In this paper we introduce a Petrov-Galerkin approximation model to the solution of linear and semi-linear elliptic boundary value problems in which piecewise quadratic polynomial space and piecewise linear polynomial space are used as the shape function space and the test function space, respectively. We prove that the approximation order of the standard quadratic finite element can be attained in this Petrov-Galerkin model. Based on the so-called 'contractivity' of the interpolation operator, we further prove that the defect iterative sequence of the linear finite element solution converge to the proposed Petrov-Galerkin approximate solution.

关键词： Petrov-Galerkin approximation defect iteration correction interpolation operator

Notes on the genus Entoloma *** the Northwest of the Iberian Peninsula(Ⅺ):a new species in subgenus Entoloma

在线全文

学校读者我要写书评

暂无评论

Studies in Fungi 2021年第1期6卷 64-70页

作者： Blanco-Dios jb Centro de Formación e Experimentación Agroforestal de Lourizán.Consellería do Medio Rural.Xunta de Galicia.P.O.Box 127.36003 Pontevedra Spain

Entoloma cedeirense,a new species in subgenus Entoloma,is described from in Galicia(NW of Spain).A detailed macro and micromorphological descriptions,drawings and a discussion with closely related taxa of subgenus Ent... 详细信息

关键词： Agaricales Basidiomycota Entolomataceae Spain Taxonomy

Notes on the genus Arrhenia(I):Arrhenia pontevedrana,*** ***(Agaricales,Basidiomycota),from the northwest of the Iberian Peninsula

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

Studies in Fungi 2019年第1期4卷 185-191页

作者： Blanco-Dios jb Centro de Formación e Experimentación Agroforestal de Lourizán.Consellería do Medio Rural.Xunta de Galicia.P.O.Box 127.36003 Pontevedra Spain

Arrhenia pontevedrana is described as a new species to science from Galicia(NW of Iberian Peninsula)based on morphological characteristics.A detailed description of basidiomata and microstructures of this species and a comparison with its morphologically closely related taxa are *** subglobisemen is recorded for the first time from the Iberian *** new combination Arrhenia kuhnerii is also proposed.

关键词： Biodiversity Spain Taxonomy Tricholomataceae

Kinetic Study on Horseradish Peroxidase Interacting with Cyclodextrin

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

Chinese Chemical Letters 2000年第8期11卷 721-724页

作者： Chen, jb Xia, CG Ben Li, S Chinese Acad Sci Lanzhou Inst Chem Phys State Key Lab Oxo Synth & Select Oxidat Lanzhou 730000 Peoples R China

The catalyst reactivity of Horseradish peroxidase was enhanced in the presence of beta-cyclodextrin. During this course, beta- cyclodextrin played a role of stabilizing the intermediates of HRP. The results have been ... 详细信息

关键词： horseradish peroxidase beta- cyclodextrin compound kinetics

A novel solid state Michael addition reaction of N-heterocyclic compounds containing active C-H bond

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 1996年第5期14卷 421-427页

作者： Li, XL Wang, YM Tian, B Meng, jb NANKAI UNIV DEPT CHEMTIANJIN 300071PEOPLES R CHINA

In this paper, a novel solid state Michael-type addition reaction of N-heterocyclic compounds containing the active-CH group was investigated. 3-Methyl-1-phenyl-5-pyrazolone (MPP) and indole (In) reacted with 4-arylmethylene-3-methyl-1-phenyl-5-pyrazolone (1) in the solid state at room temperature to give the corresponding adducts, aryl-4,4'-bis(5-hydroxy-3-methyl-1-phenyl-pyrazolyl) methane (2a-n) and 1-aryl-1-(5'-hydroxy-3'-methyl-1'-phenyl-4'-pyrazolyl)-1-(3 ''-indolyl) methane (3a-n), respectively. This is a feasible method for preparing the compound which contains two heterocyclic groups on the same carbon.

关键词： indole pyrazolone Michael addition solid state reaction

Spatial distribution of copper content in sediments of the Yangtze River system

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1997年第15期42卷 1294-1297页

作者： Zhang, CS Zhang, S He, jb State Key Laboratory of Resources and Environment Information System China Department of Chemical Geography Institute of Geography Chinese Academy of Sciences Beijing China

THE spatial distribution pattern of an element content is controlled by various geochemical pro-cesses. Studies on the spatial pattern are beneficial to further analysis on the factors. As a re-sult, our knowledge about the geochemical processes is enriched. At the same time, describingthe spatial patterns quantitatively with some indices is one way from qualitative to quantitativeanalysis.

关键词： geostatistics variogram Kriging copper.

The Synthesis of a Novel Lignan

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2000年第11期11卷 971-974页

作者： Qi, XX Chang, jb Guo, RY Chen, RF Zhengzhou Univ Dept Chem Zhengzhou 450052 Peoples R China Henan Acad Sci Henan Inst Chem Zhengzhou 450002 Peoples R China

A short convenient synthesis of a novel lignan, 2-(3',4',5'-trimethyoxyphenyl)-1,3-dimethyl-6,7,8-trimethoxy- naphthalene has been accomplished by the condensation of key intermediates, 3,4,5-trimethoxybenzyl methyl k... 详细信息

关键词： UV KBr IR The Synthesis of a Novel Lignan EtOH

Synthesis and photochromism of dimers of 4,5- diaryl-2-(2,5-dimethylthiophen-3-yl)imidazolyl

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 1997年第6期15卷 553-555页

作者： Bai, JQ Han, XC Wang, YM Meng, jb Nankai Univ Dept Chem Tianjin 300071 Peoples R China

4,5-Diphenyl, 4,5-di(4-methylphenyl), 4,5-di(4-methoxyphenyl)-2-(2,5-dimethylthiophen-3-yl)imidazoles were synthesized. Oxidation of the obtained imidazoles with potassium ferricyanide in water-alcohol solution of alkali gave the corresponding dimers. The structures were characterized by IR, H-1 NMR, mass spectroscopy and elemental analysis. The dimers showed photochromism in solution on irradiation.

关键词： synthesis imidazoles dimers photochromism