检索结果-南通市图书馆

维普期刊数据库

MOSSBAUER EFFECT SPECTRA OF PbFe_(12)O_(19) SINGLE CRYSTAL

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1980年第5期25卷 388-390页

作者：刘寄浙张毓昌焦洪震翟宏如 depatrtment of Physics Nanjing University

Ⅰ. INTRODUCTIONSince 1966 a number of successful experiments have been made on the study of Mssbauer effect of M-type hexagonal ferrites, such as BaFe12O19 and SrFe12O19. As for the study results of Mssbauer effect of PbFe12O19 very little has been reported. Unlike BaFe12O19 and SrFe12O19, PbFe12O19 is not a technically important hardmagnetic material, but it is no less interesting to inquire microscopically into the different magnetic properties of them.

关键词： hexagonal briefly technically absorber driver 印刀沙人 superposition 二衬石生

维普期刊数据库

Parallel Transitional Rules of Items in Parsing

在线全文

学校读者我要写书评

暂无评论

通讯和计算机（中英文版） 2005年第9期2卷 46-49页

作者： Yushan Sun Lei Zhou Yuqiang Sun Zhenghua Ma depatrtment of Computer Zhengzhou Economic Management Institute Zhengzhou 450052 China School of Science Xidian University. Xi＇an 710071 China

Context-free Grammars(CFGs), which are connected with linear Arrays, can be parsed in parallel on IL(i) structures and store items of the form [i,j,B ] in these structures. In this algorithm, what can be found in this transferring process are the efficiency and superiority of the algorithm. The transferring rules of IL(i) are portrayed in detail in this paper, and it can avoid the uselessness of transferring items in these circular structures, and the transferring process under these definitions is also given out.

关键词： Parallel Transitional Rules Parsing

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

华北山区大气气溶胶的化学成份

大气科学 1981年第2期 136-144页

作者：王明星,吕位秀,任丽新,J.W.温切斯特中国科学院大气物理研究所中国科学院大气物理研究所中国科学院大气物理研究所 depatrtment of occanography Florida State University U.S.A.

1980年春,用美国佛罗里达州立大学的两种采样仪取得了我国华北山区的气溶胶样品。用质子诱导x-射线发射法(PIXE)测定了这些气溶胶样品的化学成分及其浓度。本文给出了华北山区春季气溶胶化学元素组成的基本特征,并对各种化学元素的来源... 详细信息

1980年春,用美国佛罗里达州立大学的两种采样仪取得了我国华北山区的气溶胶样品。用质子诱导x-射线发射法(PIXE)测定了这些气溶胶样品的化学成分及其浓度。本文给出了华北山区春季气溶胶化学元素组成的基本特征,并对各种化学元素的来源以及元素浓度与气象条件的关系进行了初步分析。

关键词：大气气溶胶华北山区王明星元素浓度采样仪气溶胶化学化学成份

Increased stromal-cell-derived factor 1 enhances the homing of bone marrow derived mesenchymal stem cells in dilated cardiomyopathy in rats

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Medical Journal 2010年第22期123卷 3282-3287页

作者： ZHOU Yan-li ZHANG Hai-feng LI Xin-li DI Ruo-min YAO Wen-ming LI Dian-fu FENG Jian-lin HUANG Jun CAO Ke-jiang Michael Fu Department of Cardiology First Affiliated Hospital of Nanjing Medical University/Jiangsu Province Hospital Nanjing Jiangsu 210029 China Department of Nuclear Medicine First Affiliated Hospital of Nanjing Medical University/Jiangsu Province Hospital Nanjing Jiangsu 210029 China depatrtment of Medicine/Wallenberg Laboratory Sahlgrenska University Hospital Gothenburg Sweden

Background Stem cell transplantation has been shown to have beneficial effects on dilated cardiomyopathy. However, mechanism for stem cell homing to cardiac tissue in dilated cardiomyopathy has not yet been elucidated. Methods Mesenchymal stem cells were obtained from rat bone marrow, expanded in vitro, and labeled with 99mmc. Cardiomyopathy model was induced by doxorubicin in rats. 9ernTC labeled cells were infused into the left ventricles in cardiomyopathy and control rats. Sixteen hours after injection, animals were sacrificed and different tissues were harvested to measure specific radioactivity. By use of real-time polymerase chain reaction and immunohistochemistry, mRNA and protein expressions for stromal-cell-derived factor 1 in cardiac tissue were measured. Results Labeling efficiency of mesenchymal stem cells was （70.0±11.2）%. Sixteen hours after mesenchymal stem cell transplantation, the heart-to-muscle radioactivity ratio was increased significantly in cardiomyopathy hearts as compared to control hearts. Both mRNA and protein expressions of cardiomyopathy hearts as compared with control hearts. Conclusion In dilated cardiomyopathy induced by doxorubicin in heart may induce mesenchymal stem cells home to the heart. stromal-cell-derived factor 1 were up-regulated in up-regulated expression of stromal-cell-derived factor I

关键词： mesenchymal stem cells stromal-cell-derived factor 1 cardiomyopathy

维普期刊数据库

Characterization of response behaviors of chironomid larvae in different concentrations of toxic chemicals

在线全文

学校读者我要写书评

暂无评论

Characterization of response behaviors of chironomid larvae ...