细胞培养基底膜伸张实验装置的研制

为研究离体培养细胞在应变作用时的生长行为,研制了可模拟生物软组织细胞在生理或病理应变情况的离体加载装置。本装置的方法是将细胞培养于弹性硅橡胶薄膜（厚度０.2mm）的上表面,弹性膜固定于压力腔的上方,在电路控制上蠕动泵使压力腔的压力产生周期性变化,弹性膜在此压力作用下发生周期性的。弹性膜的周期将牵动粘附于其上表面的细胞产生周期性伸张,从而实现对细胞施加周期拉伸变形的作用。装置中弹性膜周期伸长的应变峰值和周期分别在０.007-0.0３和０.０６－０.１１８Ｈz范围内可调。本装置对研究细胞的应力－生长关系十分有用。     

新型阴离子聚合引发剂的合成和表征

以对甲氧基苯甲酸为原料经多步合成,得到了含噻二唑环的新型阴离子型聚合引发剂,用ＩＲ,ＮＭＲ对产物进行了表征。     

DMAP在高位阻醇酰化反应中的催化活性

以ＤＭＡＰ为催化剂,对高位阻叔丁醇与乙酸酐之间发生的酰化反应进行了实验研究,通过合理的方案设计,筛选出了可使产物收率达到８７％以上的最佳实验条件。     

The carbon isotope study of biomarkers in the Maoming and the Jianghan tertiary oil shale

In terms of the individual carbon isotope data of biomarkers present in the typical freshwater lake sediment (Maoming oil shale) and saline lake sediment lake (Jianghan oil shale) of China, this paper discusses their precursors and depositional environments of biomarkers in both sediment samples. Our studies showed that phytane and pristane of the Maoming oil shale were derived from the phytol side chain of chlorophyll a. By comparing the isotopic composition of 4-methyl sterane with that of sterane and hopane, it is suggested that 4-methyl sterane which has a higher abundance in the Maoming oil shale come from bacteria. The isotopic composition of biomarkers from the Jianghan rock sample (saline lake sediment ) is significantly different from that of the Maoming oil shale (freshwater lake sediment). Gammacerane was derived from haloprotozoan, with δ13C being about -25.8‰, just in consistency with the value reported in previous studies. The isotopic composition of phytane and pristane in the Jianghan rock is similar to that of sterane and 4-methyl sterane derived from phytoplanktons, illustrating their commonprecursors were algae. This paper reported for the first time the carbon isotope data of porphyrin obtained by GC-IRMS techniques. The approximate δ13C of C32DPEP and C31DPEP porphyrin from the Jianghan Basin indicated that the porphyrin was derived from chlorophyll. In the Maomingoil shale C32DPEP was enriched in 13C relative to C32etio and C31DPEP, implying that C32DPEP came from chlorophyll, and C32etio and C31DPEP are of other origins.     

Molecular organic geochemical peculiarities of lacustrine core sediments in Fildes Peninsula, King George Island, Antarctica

The peculiarities of lipids in lacustrine core sediments from Fildes Peninsula, King George Island, Antarctica, are reported. The origin of high-molecular-weight n-alkanes, alkenes,fatty acids, alcohols is supposed to be related to the abundant moss occurring in the sediments.Abundant iso-and anteiso-fatty acids that occur in the sediments indicate a relatively strong bacterial activity in non-ice-cover zone than in other regions in Antarctica. The C18:2 unsaturated fatty acids mainly originate from autochthonous algae in the sediment pool, and the C18:2/C18:0ratios in the profile are controlled more by paleotemperatures than source assemblies. Long-chain alkenones were identified in freshwater lacustrine sediment in Antarctica for the first time, of which Prymnesiophyceae is assumed to be the source organism. High relative abundance of C37:4honologue in long-chain alkenone well correlates to the severely cold climate in Antarctica.     

二维子特征库的研究及其应用

介绍在ＡｕｔｏＣＡＤ环境下用二维表达建立子特征库的原理和方法。依据特征建模理论,通过特征定义建立相应的子特征库,并在操作时将这些特征实例化。     

面向对象的电力系统变电所运行日志管理系统设计

本文介绍了电力系统变电所运行日志管理系统的开发方法和实现过程 .该系统以面向对象技术为基础进行系统的设计和实现 ,使系统具有高效率、易实现、易扩展等一系列优点 .     

MR-CGS:一种最小剩余CGS方法在DDM求解中的应用

从CGS方法入手,针对该算法在收敛过程中出现的残差不平稳的缺点,对CGS算法进行改进,给出了一种最小残差CGS(MR-CGS)算法.算例给出了该改进算法在求解DD模型中的应用.     

政府选择与我国高技术产业发展

本文从产业政策、资金政策和资源政策等三方面分析了政府在高技术产业中的作用,并针对我国的实际状况提出若干建议。     

云杉红翅小蠹信息素Seudenone和(±)-Seudenol的简便合成

3-甲基环己-2-烯-1-酮(Seudenone)是云杉红翅小蠹的抑制信息素,3-甲基环己-2-烯-1-醇(±-Seudenol)却是一种聚集信息素.本合成利用乙酰乙酸乙酯和多聚甲醛为原料,通过缩合、水解脱羧和区域选择性还原三步反应合成了两个所需产物.