In vitro protein synthesis and α amylase activity in F cells from hepatopancreas ofPalaemon serratus (Crustacea; Decapoda)

In crustaceans, all the steps in the assimilation of food take place in the hepatopancreas. To facilitate the study of this organ, a method for the dissociation of cell types was developed. The hepatopancreas of the prawnPalaemon serratus was mechanically dissociated and the cells separated by Percoll density-gradient centrifugation. The E and R cells had similar densities of around 1.05 g/ml. The F cells were separated into two distinct fractions with densities of 1.075 and 1.082 g/ml. The B cells sedimented at a density of 1.12 g/ml. The ratio between the two populations of F cells was found to vary during the intermolt cycle while B cells disappeared after the molt. When the density gradient fractions were incubated with³H-leucine, incorporation was highest in the F cell fractions. Measurements of -amylase activity, indicated that the two populations of F cells may be derived from the same cell type.     

Sex pheromone of the pine sawflyDiprion pini (Hymenoptera: Diprionidae): Chemical identification,synthesis and biological activity

The main component of the sex pheromone secretion of femaleDiprion pini L. (Hymenoptera: Diprionidae) from insects collected both in Finland and in France has been identified as athreo-3,7-dimethyl-2-tridecanol (8 ng per female) stereoisomer by GC-MS and synthesis. The secretion also contains lower and higher homologues in small amounts (1–4% of the main component). Combined gas chromatographic-electroantennographic detection showed activity in both natural and esterified extracts (acetates and propionates); the esters of the main component gave the largest responses. The acetates and propionates of the eight stereoisomers of 3,7-dimethyl-2-tridecanol were synthesized from enantiomerically highly enriched (>99% ee) building blocks. The stereochemistry of the main component was established to be (2S,3R,7R)-3,7-dimethyl-2-tridecanol by GC analysis of the natural material. It was purified by liquid chromatography prior to the GC analysis of both its pentafluorobenzoates and its isopropylcarbamates on a non-chiral polar column (ECD) and a chiral column (NPD), respectively. Field tests demonstrated that both the acetate and propionate of the main component (100 g of each applied on cotton roll dispensers) were active in attracting males, with or without the presence of several of the minor compounds. Experiments with smaller amounts of the acetate and the propionate (1 g in France and 50 g in Finland) demonstrated that the propionate was more active than the acetate, and that it also caught more males than a blend of the two compounds.     

苯甲醛缩氨基硫脲Cu(I)、Zn(Ⅱ)配合物的直接电化学合成

用电化学金属阳极氧化法在非水溶剂中合成了苯甲醛缩氨基硫脲（ＨＬ）与Ｃｕ（Ｉ）、Ｚｎ（Ⅱ）配合物,通过元素分析、红外光谱、紫外光谱、磁矩、摩尔电导等对配合物进行了表征。     

微波合成PMMA胶乳粒子

在常压微波辐照下合成聚甲基丙烯酸甲酯（ＰＭＭＡ）单分散的胶体微粒。体系中未加表面活性剂和稳定剂,在透射电镜下观察粒子的形状和直径大小,并得出在引发剂浓度一定的条件下,微粒的体积与单体的浓度呈现线性关系,为我们合成一定大小的超细微粒提供了选择的条件。功力学实验表明,微波场下反应速度大大加快,反应是突变的,无恒速阶段。     

7,8-二甲基-3,6-二苯基-5-氧-8-氮螺[2.6]壬-4,9-二酮的合成及其晶体结构

利用手性源（2R,3S）－3,4-二甲基-2-苯基-1,4-氧氮杂-5,7-二酮（1）合成了具有光学活性的7,8-二甲基-3,6-二苯基-5-氧-8-氮螺[2．6]壬-4,9-二酮（3）．测定了化合物（3）的晶体结构,并讨论了在环加成反应中的不对称诱导作用的机理．     

红藻藻胆体内部蛋白间的能量传递研究 Ⅰ.人工合成R-PE/R-PC/APC复合物内的能量传递

研究了人工合成的藻胆体模拟复合物的时间分辨荧光光谱,并运用多指数拟合的方法对数据进行了详细的处理和分析,结果表明能量在Ｒ－ＰＥ和Ｒ－ＰＣ之间的传递时间与能量从Ｒ－ＰＣ传递到ＡＰＣ的时间几乎相等（５０ｐｓ）;除此之外,Ｒ－ＰＥ到ＡＰＣ还有两种能量传递的通道,能量在这两个通道的传递时间分别为１１０ｐｓ和４００ｐｓ．即：蛋白之间的能量传递通道是并行的．     

有机锡含氮双齿配体配合物的合成及生物活性研究

合成了两种有机锡含氮双齿配体配合物,通过元素分析、ＩＲ和＾１Ｈ ＮＭＲ对其结构进行了表征,并考查了它们的生物活性。     

凸轮-连杆组合机构设计系统

将计算机辅助设计技术、网络技术与机构设计相结合,以组合机构的尺寸综合理论为基础,以机构最小尺寸为优化目标,采用Java作为开发语言,应用模块化的面向对象的设计方法,研制开发了凸轮-连杆组合机构网上设计系统.     

手性膦配体催化剂在不对称合成中的应用研究

本文详细介绍了手性膦配体催化剂在不对称羰基化、芳基化、烷基化、硅氢化中的催化反应,并提出了研究手性膦配体催化剂的方向和存在的主要问题.     

热气机Ericsson传动机构的优化设计研究

提出了热气机工质的一种循环压力改进计算方法,以理论输出功最大为目标建立了一种传动机构即Ericsson机构的尺度综合优化模型,确定了该机构的最佳几何参数.优化结果表明该方法对于优化该机构的几何参数、提高热气机的理论输出功率具有明显的效果.