C－isotope composition and significance of the Sinian on the Tarim plate

102 samples of limestones,mudrocks shales and tillites from the Sinian in Kuluketage have been analyzed ,Four formations in the Sinian belong to glacial deposits in which the differences in δ^13C are distinct (-14.7‰- 4.2‰),Distinctly negative δ^13C excursions for three times support the viwe of three glacial deposits in this area suggested by previous authors,except for the durations of them ,δ^13C values are generally positive in the Beiyixi Formation of lower part of the Lower Sinian ,representing probably the rock records of a continental rift related to break-up of the Rodinian supercontinent,There are three times of distinct excursions of δ^13C curve in all strata,The first one is from positive values at the bottom to about -5‰ at the top of the Beiyixi Formation ,The second one,from 0‰-3‰ in the Arletonggou Formation of upper part of the Lower Sinian to -3.4‰---14.4‰ in the Teruiaiken Formation.The third one,from positive values in the Zhamoketi Formation of lower part of the Upper Sinian to negative values in glacial varves at the top of the Hankeerqiaoke Formation.     

Effects of hyaluronic acid－chitosan－gelatin complex on the apoptosis and cell cycle of L929 cells

With the development in the field of tissue engineering, the interaction between biomaterials and cells has been deeply studied. Viewing the cells seeded on the surface of materials as an organic whole, cell cycle and apoptosis are analyzed to deepen the study of cell compatibility on biomaterials, while cell proliferation and differentiation are studied at the same time. In this paper, hyaluronic acid is incorporated into the chitosan-gelatin system. Propidium iodide (PI) was used in cell cycle analysis and the double-staining of cells with annexin-V and PI was applied in cell apoptosis analysis. The results show that incorporated hyaluronic acid shortens the adaptation period of cells on the material surface, and then cells enter the normal cell cycle quickly. In addition, added hyaluronic acid inhibits cell apoptosis triggered by the membranes. Therefore, hyaluronic acid improves the cell compatibility of chitosan-gelatin system and benefits the design of biomimetic materials.     

Building of hFⅨ transgenic mice by spermatogenic cells

Human FⅨ expression vector pCMVⅨ was packaged by effectene^TM reagent and injected into mice seminiferous tubules with glass pipettes.The expressional frame of pCMVⅨ was examined by PCR and Southern blotting among 41 progenies.There were 2(4%) mice being integrated with hFⅨ gene into chromosomes.4.6ng/mL of hFⅨ protein was expressed in plasma of one mouse,which was tested by ELISA.We demonstrated that building of transgenic animals by spermatogonial stem cells is an efficient method.Meanwhile,it has also been proved to be an alternative choice for mammary gland bioreactor.     

新型电液激振装置的性能研究

结合电气与液压传动的性能优势，开发出电液激振装置，推导出该装置相关参数的相互关系式。经试验得出，激振装置的振动频率、振幅、压强、流量可以根据需要进行调节。可成为煤矿、冶金、建筑等行业振动设备的一种新型激振装置。     

用知识管理构建电子商务实验教学体系

文章提出用知识管理构建电子商务实验教学体系的观点，就电子商务实验教学体系的建设中，如何构建学习组织、学习系统的思想和方法，进行知识交流与共享．运用知识管理进行实验创新，进行了相应的探讨．     

西部地区科技创新现状及对策研究

本文分析了国内外科技创新形势，对西部地区，特别是陕西、四川、重庆区域的科技创新能力进行重点研究，通过对比指出西部科技创新中所存在的体制、机制方面的问题，提出了西部地区加强科技创新促进经济发展的若干对策。     

桩端压力注浆桩在卵石层中的应用

灌注桩采用桩端压力灌浆新技术后，能大幅度地提高基桩承裁能力，减小其沉降，在工程中已运用多年，但大量工程实践表明其对不同地层的适应性是不同的。根据某工程中钻孔灌注桩现场试验，对桩端压力灌浆技术在卵石层中灌注桩的运用效果其及经济、社会效益进行了分析。     

浅谈电煤价格上涨的必然性

从煤炭的供求现状、市场经济规律、我国电煤价格在备用煤行业及在世界能源产品中价格偏低的状况以及油价的大幅度上升导致煤炭的上涨等方面阐述了我国电煤上涨的必然性。     

时分交换的IPover WDM网络接入特性研究

 对在光网络层采用时分与波分相结合交换的Ipover WDM网络结构及交换方法进行讨论,并对其网络的阻塞特性和随机接入特性进行分析研究.结果显示随机接入算法能够有效地解决阻塞问题,进一步提高信道利用率.     

高雷诺数情况下钝体绕流的数值模拟

在高雷诺数 (Re=1× 1 0 4)情况下 ,利用流函数———涡量法在二维空间对半圆半椭圆的拼接体 (新月形覆冰导线的截面 )绕流流场的流动结构、涡的变化及气动力特性进行数值模拟 .将模拟过程用于圆柱体和半圆半椭圆拼接体 ,结果与前人的研究结果及试验值相吻合 ,验证了此数值模拟过程的合理性