轻质页岩脱色性能的研究

本文研究了轻质页岩的脱色性能，其最佳活化温度为６００～７００℃。最佳活化时间为０．５ｈ，并获得了有意义的结论。     

Function of DnaJ and DnaK as chaperones in origin-specific DNA binding by RepA

Heat-shock proteins are normal constituents of cells whose synthesis is increased on exposure to various forms of stress. They are interesting because of their ubiquity and high conservation during evolution. Two families of heat-shock proteins, hsp60s and hsp70s, have been implicated in accelerating protein folding and oligomerization and also in maintaining proteins in an unfolded state, thus facilitating membrane transport. The Escherichia coli hsp70 analogue, DnaK, and two other heat-shock proteins, DnaJ and GrpE, are required for cell viability at high temperatures and are involved in DNA replication of phage lambda and plasmids P1 and F. These three proteins are involved in replication in vitro of P1 DNA along with many host replication proteins and the P1 RepA initiator protein. RepA exists in a stable protein complex with DnaJ containing a dimer each of RepA and DnaJ. We report here that DnaK and DnaJ mediate an alteration in the P1 initiator protein, rendering it much more active for oriP1 DNA binding.     

Statecharts for Distributed Product Data Management System Modelling

Product data management (PDM) has been accepted as an important tool for the manufacturing industries. In recent years, more and mor e researches have been conducted in the development of PDM. Their research area s include system design, integration of object-oriented technology, data distri bution, collaborative and distributed manufacturing working environment, secur ity, and web-based integration. However, there are limitations on their rese arches. In particular, they cannot cater for PDM in dis...     

非惯性系内的气体浮力问题

本文研究了气体浮力的产生机制，并且重点讨论了非惯性系内的气体浮力问题，给出了有关计算公式。     

被动雷达导引头多脉冲辐射源的角度分辨与跟踪

讨论了被动雷达导引头主波束内存在多脉冲辐射源时对多辐射源进行角度分辨并跟踪某一辐射源的方法。首先利用聚类分析法实现多辐射源角度分辨 ,然后利用主波束角度压缩方法实现单一辐射源跟踪。计算机仿真结果表明 :在中等密度脉冲辐射源环境下 ,采用聚类分析和主波束角度压缩相结合的方法可较好地实现导引头主波束内多脉冲辐射源的角度分辨与单一辐射源跟踪     

Comparison of the effects of different isomers of bicuculline infused in the preoptic area on male rat sexual behavior

Summary Intracerebral infusion of (+) bicuculline methiodide, but not of its (–) isomer, in the preoptic area, stimulated masculine sexual behavior in rat as evidenced by a decrease in the number of intromissions preceding ejaculation and a shortening of the ejaculation latency and postejaculatory interval. Data suggest a role of the GABAergic system in mediating masculine sexual behavior.Acknowledgments. Authors wish to thank Ms Elisabeth Wallin for excellent technical assistance and Ms Madelene Kröning for preparing the figures.     

基于两个矩阵方程的一种求逆速算法

基于两个矩阵方程，讨论了矩阵的一种快速求逆算法。在考虑矩阵的对称性，稀疏怀及减缩部分逆阵元素后，推导出逆阵块元素B11^-,B12^- 和B12^-的计算公式并给出算法程序实现方案与算例，是一种大幅减少计算机存贮量与计算次数的快速有效算法。     

Studies on the Dd antigen-antibody system. I. The nature of antigen Dd and its antibodies

Summary The nature of antigen Dd, an antigen present in the extracts of human dandruff which precipitates human sera selectively, and antibodies reacting with it are reported.This work was supported through U.G.C. Grant No. F.23-230/75/SR II. H.K. participated in this study, first as J.R.F. of U.G.C. and then as S.R.F. of I.C.M.R. We are grateful to Dr Baruch S. Blumberg for his invaluable suggestions and to Professor H. Walter for the gift of IgG, IgM and IgA immune sera.     

显微组织对NdFeB磁体β（iHc）的影响

研究了显微组织对ＮｄＦｅＢ磁体ｉＨｃ及β（ｉＨｃ）的影响，对ＮｄｘＦｅ９３－ｘＢ７磁体，ｘ从１６增加到２８时，Ｈｃ增加了５５％，β（ｉＨｃ）降低了约１１％；进一步优化显微组织，增加富Ｎｄ晶间相，减弱晶粒间的磁耦合作用及消除晶粒表面的高退磁场区域，不仅可提高磁体的矫顽力，亦可显著改善其矫顽力温度系数。     

Post-treatments of Super Absorbent Polymer

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