黄曲霉毒素脱毒方法研究进展

黄曲霉毒素(Aflatoxin,AFT)是一种毒性极强的剧毒物质.黄曲霉毒素污染的问题已是食品卫生工作中的一个世界性的重要课题,20世纪60年代以来黄曲霉毒素的防治与脱毒备受人们关注.传统常用的理化脱毒法存在着破坏饲料营养成分、对动物体造成毒害、脱毒效应不高、成本昂贵、给环境带来二次污染等问题.相对而言,生物技术脱毒法主要是通过破坏、修饰或吸附真菌毒素,从而达到减少或消除毒素的目的,具有高度的专一性、对饲料和环境无污染、不造成营养损失、能够避免毒素的重新产生等优势.     

Improving network service performance and reliability via links trunking technologies

INTRODUCTION Because of the critical role that computing sys-tems and networks play in today’s business envi-ronment, it is not surprising that business success often goes to the company with the best information and the most efficient process for delivering that in-formation. As the principal tool for business col-laboration, corporate LANs are a vital resource in enabling today’s enterprises to adopt competitive strategies. The number of users wanting to share and access data across…     

A collective bargaining election: Issues and faculty voting behavior

Following the election of a faculty collective bargaining agent at the 14 Pennsylvania state colleges, the authors administered a survey questionnaire to a 50% sample of the bargaining unit. The objectives of the research were to identify relationships between faculty choice of a bargaining agent and several collective bargaining issues: attitudes about the contending associations, the extent to which internal versus external governance matters influenced voting behavior, attitudes about the scope of negotiations, attitudes about the defined bargaining unit, attitudes about faculty strikes, and demographic faculty characteristics. The authors provide primarily a narrative of the research findings and end with a succinct general summary of their findings. A brief discussion is also presented on the potential impact on elections of voters who fail to vote their conscience.     

电视AFT电路工作原理及信号流程分析

在了解遥控彩电中AFT电路的工作啄理的基础上,详细分析了AFT电路、微处理器和电子调谐器三者之间的信号流程。最后对AFT电路失常时引发的故障现象进行剖析。     

彩电自动搜台漏存的故障原因及检修方法

深入分析了彩电自动搜台漏存的故障原因,全面总结了漏存故障的检修方法,典型介绍了漏存故障的检修实例.     

美国中小学教师工资的当前状况——美国教师联合会(AFT)2007年教师工资调查报告简介

美国教师联合会于2007年3月29日公布了调查报告,内容涉及到2005年的美国教师工资情况。报告分别从教师平均工资、初任教师工资、教师工资购买力、与经济发展和物价上涨的比较等角度,展示了教师工资近几十年来的变化趋势,在指出提高教师工资迫在眉睫的基础上,提出了提高教师工资的具体目标并论证了其可行性。     

基于地址转发表的物理拓扑自动发现算法改进

在分析物理层网络拓扑自动发现的各种算法的基础上,对现有的基于地址转发表（AFT）算法进行改进,提出的新算法支持异构、不要求AFT表完整,并且可以对不支持SNMP的设备进行处理。并能区别存在哑交换机或者集线器的情况。