R.j.191/pJG137G重组体(英文)

R.j.191/pJG137G重组体由osm供体与nif受体借转交法创建而成。基因表达表明,这一重组体能耐高盐(3.2M NaCl)、抗生素(Tc 100μg/ml,Trim 50μg/ml)和毒素(Azet 100μg/ml)。该重组体在大豆根上能结瘤,并且从根瘤中分离出的后代品系对盐、抗生素和毒素仍保持同样高的抗性。这表明重组体的nif/osm基因型能传代。它将是遗传工程中有价值的载体。     

Cs~(137)的衰变

利用中间成象式β磁谱仪和双透镜β磁谱仪研究了Cs~(137)的β谱和661.6kevγ跃迁的内转换电子根据得到的结果确定了Cs~(137)的衰变网图.     

中和渗析法中部分氨基酸的传质过程研究(英文)

对甘氨酸、丙氨酸和丝氨酸在中和渗析法中的传质行为进行了研究,渗析结果表明,它们在等电点处的传质速率最大,对这种现象,可通过定量比较不同的pH条件下甘氨酸在离子交换膜上的浓度来予以解释,取决于溶液pH值的甘氨酸传质速度与所计算出的在不同pH条件下与阴、阳离子交换膜交换的甘氨酸浓度相一致。     

简讯(英文)

Introduction of School of Information Science and Technology (SIST)The School of Information Science and Technology (SIST) of Tsinghua University was founded in 1994, and consists of three Departments (Electronic Engineering, Computer Science and Technology, Automation), one Institute (Microe-lectronics), as well as the Research Institute of Information Technology, Joint Laboratory on Information Science and Technology, Tsinghua University Software College, and the National Training Center in Integrated Circuits.     

油井反向调驱(堵水)技术在低渗油田中的应用

为提高因天然裂缝或压裂裂缝造成注入水沿裂缝方向指进导致油井含水上升的水淹油井的采收率,采用适合高渗油层和裂缝性低渗油藏封堵大孔道的反向调驱(堵水)技术,对高含水油井进行反向调驱(堵水),在靖边采油厂实施矿场试验井4口,单井平均含水率从95.6%降至53.65%,单井平均日产油从0.115 t上升至1.32 t,累计增油2870.9 t,投入产出比为1∶3.1,达到增油降水的目的,对提高水淹井的利用率和油田的产能具有重要意义。     

关于次二次哈密顿系统次调和解的研究(英文)

运用Galerkin逼近的方法和Maslov型指标理论的迭代不等式研究了哈密顿系统z(t)=J▽H(t,z(t))次调和解的存在性,其中H(t,z)=1/2(B(t)z,z)+H(t,z),B(t)是半正定对称连续矩阵,H是非凸的、无界的和非一致强制的.同时还证明了这些解在一定的条件下是几何相异的.     

电脑幽默(英文)

Over the years I have heard my share of strange questions and silly comments from people who call the computer software company where I work as a tech support telephone operator. But one day 1 realized how     

英语绕口令(英文)

A big black bug bit a big black bear, made the big blackr bear bleed blood. A bloke's back bike brake block broke. A box of biscuits, a batch of mixed biscuits.     

几乎准素子模(英文)

作为交换环上的酉模的准素子模和弱准素子模的推广,定义了几乎准素子模.主要研究了几乎准素子模的性质以及特点,特别是乘法模上的几乎准素子模的性质.     

C-lpp半直积(英文)

本文得到了幺半群的半直积是C-lpp的充分必要条件,研究了$C-$lpp半直积的结构,特别是其同余可分解性。     

英语小品(英文)

"Life is a lie…without an f…" When a net friend suddenly said so.I was really surprised.I know he was jok- ing.However,that saying really made me think of what life could be.After all,I do not Want my life to loose the "f".     

傻瓜来信(英文)

Only One Instance Mr.Henry Beecher entered Plymouth Church One Sunday and found Several letters awaiting him.He opened one and found it contained the single word“Fool.”Quietly and with becoming seriousness he an-     

学英语(英文)

Plants植物Wecanseeflowers,grassandtreesnearlyeveryday.Theyareallplants.Plantsareeverywhere.Someplantsgrowonmountains.Someplantsgrowinthedesert.Andsomegrowintheocean(海洋).Plantsareimportant.Wegetfoodfrommanykindsofplants.Andwegetfoodfrommanyparts(部分)ofp     

一类次二次哈密尔系统的多重次调和解(英文)

通过极小极大方法,获得了一个具有部分周期位势的一类次二次哈密顿系统的次调和解的存在性与多解性结果.     

广义弱smash(余)积(英文)

本文引入并研究了广义弱smash积和广义弱smash余积,主要给出了关于广义弱smash积的一个Maschke形式定理.     

全球招聘新闻(英文)

博士后岗位[美国]Cleveland ClinicCleveland Clinic opens NIH-funded positions to study newly discovered transmembrane proteases involved in cardiovascular disease.Research projects include biochemical analysis of novel enzymes and phenotypic characterization of     

全球招聘新闻(英文)

博士后岗位[加拿大]University of British Columbia Two Postdoctoral positions are available immediately in the Wine Research Centre （website： http：//www.landfood.ubc.ca/wine/index. html） for a 24-month appointment with potential for extending employment. These positions are funded by large-scale Genome British Columbia wine geuomics grants to characterize fermentation stress response genes in S. cerevisiae. Successful candidates will be responsible for establishing function of each of these 62 genes induced during wine fermentation using a systems biology approach.     

全球招聘新闻(英文)

正博士后[美国]New York University New York University opens a postdoctoral position.They are in search of highly motivated,creative individuals with a strong interest in epithelial biology.They are presently focusing their efforts on bacterial/host urothelial interactions,membrane trafficking and urothelial stem cells using a combination of cell culture,transgenic mouse and a wide range of biochemical,molecular and cell biological techniques.Applicants should have a     

∑关系通解(英文)

我们应用新定义的余弦矩,把Hauptman的s个归一化结构因子联合概率密度基本公式,做了两方面的改进: (1)适合所有空间群; (2)可以利用标准定积分公式。 在此基础上得到Σ关系通解。它可以概括从Σ_到Σ_8的所有Σ关系式,以及任何新的高级Σ关系式,并且易于程序化。 通解的各种具体形式,为高级Σ关系的应用提供了可能性。 新的联合概率密度公式及通解公式见下面的英文。