磁光光盘动态性能的研究

该文报道了所研制的具有AIN/TbFeCo/AIN/AI四层结构磁光光盘的动态性能测试结果.当记录信息位尺寸为1μm时,信息读出载噪比大于45dB,载噪比随盘片径向位置而异.文中根据测试结果,讨论了影响载噪比的诸因素.     

中国数学史断代研究的一项新成果：—《明清数学史论文集》简介

本文简介梅荣照主编的《明清数学史论文集》一书，对中国数学史开展断代专题研究，是我国数学史界继承并发展李俨、钱宝琮、严郭杰先生研究成果的宏大计划，持续近三十年，历来为国际科学史界所重视，文集收入论文15篇、附录2篇，其中严敦杰先生遗作7篇，本文对15篇论文逐一作了简介。     

取代[14]轮烯,[18]轮烯和卟吩的异构体计数

用图论方法对取代〔１４〕轮烯、〔１８〕轮烯和卟吩的构造异构和构型异构体数进行计算。计算结果列表表示。     

一种防空C~3I系统的效能分析方法

本文讨论了一种评定C~3I系统效能的方法。这种方法是根据系统完成使命的能力和系统的内部结构两方面的分析来完成的。通过对IFFN系统的评定,对本方法进行了举例说明。     

Selective protection of cells against X-irradiation. Isoproterenol protects only those cells that possesβ-adrenoreceptors

Summary In mixed culture of Chinese hamster fibroblatst, clone 431, and transformed murine L fibroblasts, clone B-82, isoproterenol was found to protect only 431 cells against ionizing radiation. It was shown that 431 cells, in contrast to B-82 cells, possess-adrenoreceptors, and the radioprotective effect of isoproterenol can be realized only if this agent interacts with-adrenoreceptors coupled with the cAMP system. Since malignization often causes the disappearance of-adrenergic and other hormone receptors, the combined culturing and irradiation of the cells studied can be regarded as a model of the growth of malignant cells (B-82) among normal tissue cells (431 cells) under conditions of radiation therapy. A possibility of selective protection against radiation damage of normal tissue cells, with retention of the former radiosensitivity of tumor cells, is discussed.     

A novel mechanism for jumping in the indian ant<Emphasis Type="Italic">Harpegnathos saltator</Emphasis> (Jerdon) (Formicidae,Ponerinae)

The Indian antHarpegnathos saltator may be unique among insects in using its jumping capacity not only as an escape mechanism but also as a normal means of locomotion, and for catching its prey in flight. High-speed cinematography used to analyse the various phases of the jump suggests thatHarpegnathos employs a novel jumping mechanism to mediate these behaviours: namely the synchronous activation of its middle and hindlegs. Electrophysiological recordings from muscles or nerves in pairs of middle and hindlegs show remarkably synchronous activity during fictive jumping, supporting the synchronous activation hypothesis.Harpegnathos is not the only ant to jump, and a cladistic analysis suggests that jumping behaviour evolved independently three times during ant evolutionary history.     

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。     

药品管理系统在医院的应用

文章主要介绍药品管理系统的运行环境、系统流程、系统功能以及对该系统中的三个子系统即药库管理系统、门诊药房管理系统、住院药房管理系统在医院的应用进行了阐述，并提出了在应用中出现的问题及规范措施。     

原子吸收解吸仪分离测定食品中镉

应用ＹＡＥ—２原子吸收解析仪自动萃取食品中的镉．结果表明，镉在ＰＨ８～９的氨缓冲溶液存在的条件下被ＥＤＴＡ富集柱富集，用 １ｍｏｌ／Ｌ硝酸溶液作洗脱载液，测定食品镉含量在 １００～２０００μｇ／ｋｇ之间时，线性关系成立．标准差为０．００４２ ｍｇ／ｋｇ，均值为 ０．２１７ ｍｇ／ｋｇ，变异系数 １．９３％．检出限为 ５ μｇ／Ｌ．本方法适用于各种食品中镉的分析，是一种在线高速解吸的分离分析技术．     

电磁场理论中的几何化·数论消发散方法(IV)──双圆杆和双椭圆杆内导体电容系数的数值结果

该文是ＧＮＥＳ方法在微波定向藕合器电容系数计算中的具体应用，讨论了系数矩阵元的高精密计算和线性方程组维数的选择，分析了主要误差来源，具体计算双圆杆内导体在对称和非对称两种情况下的电容系数，并与零级近似下得到的柱对称模型的解析解作了比较。文中还考察了电容系数随各个几何参数改变的情况，并作了定性解释，最后绘出双椭圆杆内导体的电容系数结果。