气相色谱-质谱联用法分析奶及乳制品中的脂肪酸

对奶及乳制品中脂肪酸的组成和含量进行测定.采用哥特里-罗兹法提取奶及乳制品中的脂肪油,氢氧化钾-甲醇溶液法甲酯化,以气相色谱-质谱联用仪进行了分析,结果表明奶及乳制品中的脂肪酸主要以碳8到碳24的脂肪酸为主,各脂肪酸在不同类型的奶及乳制品中含量也不相同.     

Ethene/norbornene copolymerization by [Me2Si(3-tertBuCp)(NtertBu)]TiCl2/MAO-catalyst

Ethene/norbornene copolymerization by the catalyst system [Me₂Si(3-^tertBuCp)(N^tertBu)]TiCl₂/MAO was investigated in detail at 30 °C, 60 °C, and 90 °C. A mass flow controller was used in this work to obtain kinetic data and investigate temperature's effects on activity, norbornene incorporation, copolymerization parameter, microstructure, glass transition temperature, and molar masses were described. High copolymerization valuesr _ξ and high alternation are determined. The number of isotactic alternating sequences is much higher than that of the syndiotactic alternating sequences.     

黑客的入侵与安全性建设

对黑客入侵网络系统的方式与相应的防范措施进行了详细的理论分析和探讨 ,旨在为网络安全性建设提供理论参考 ,并提出了安全性建设的原则     

常用的网络命令工具的使用方法及在网管中的应用

介绍了几种常用的网络命令工具，并通过一些实例对这些命令的使用参数及方法做了详细的介绍．     

古汉语谦敬称谓词类的词性探讨

古汉语谦敬称谓词类的词性，有两种不同的看法：代词说和名词说。通过全面考察，我们发现它们的语法功能、语义演变、代替作用等，都同名词基本相同，而与代词相距较远。因此，它们应该归属于名词。仅仅因为其代替作用就把它们归为代词是不恰当的，我们应该考虑其整体特点。     

基于存储方式的非线性编辑系统的研究

介绍基于SAS/DAS、NAS和SAN存储方式的非线性编辑系统构架 ,并对SAN非线性编辑网络系统及其应用进行分析 .     

用单片机I/O引脚实现A/D功能的原理与应用

本文利用现行有些单片机输入，输出(I／O)引脚的输入阻抗高、输出驱动能力强的特性，分析了用I／O引脚实现模数转移的原理，并在此基础上，提出了这种方法在电阻测量、键盘检测中的应用。通过该方法的讨论可开阔解决问题的思路。     

Praxisleitfaden zur Betreuung von Diplomarbeiten

Die vorliegende Arbeit beschreibt erfolgskritische Faktoren des bei der Erstellung von Diplomarbeiten zwischen Studenten und Gutachter bestehenden Betreuungsverh?ltnisses und soll praktische Hinweise zu dessen Optimierung liefern.     

The influence of feedback of diagnosis and executive function skills on rates of false positive and false negative outcomes for ADHD

This study examined executive function (EF) skills and self-reported symptoms of ADHD. EF skills were measured to determine whether skills were different between groups that reported clinical levels of ADHD symptoms (clinical group) and nonclinical levels of ADHD symptoms (nonclinical group). EF skills in the nonclinical group were also investigated to determine whether differences existed for those who received false positive and negative feedback about an ADHD diagnosis. Results indicated statistically and clinically significant differences in EF skills between the clinical and nonclinical group. Participants in the nonclinical group who reported elevated scores on the ADHD screener after receiving false positive feedback had statistically significantly different EF function scores, but not clinically significant scores, compared to the participants in nonclinical group who received negative feedback.     

FRACTAL MORPHOLOGY IN DLA UNDER MULTIPARAMETER

ＦＲＡＣＴＡＬＭＯＲＰＨＯＬＯＧＹＩＮＤＬＡＵＮＤＥＲＭＵＬＴＩＰＡＲＡＭＥＴＥＲＷａｎｇＪｕｎｓｈｅｎｇ（王俊生）；ＷｅｉＹｕ（韦钰）（ＮａｔｉｏｎａｌＬａｂｏｒａｔｏｒｙｏｆＭｏｌｅｃｕｌａｒａｎｄＢｉｏｍｏｌｅｃｕｌａｒＥｌｅｃｔｒｏｎｉｃｓ）...