高压微波催化合成肉桂酸甲酯

在硫酸铁铵的催化下 ,利用高压微波技术 ,快速合成了肉桂酸甲酯。最佳反应条件为 :甲醇和肉桂酸的摩尔比为 5 :1,催化剂用量为 2 .0g ,微波时间为 3min ,微波功率为 72 9W ,产率达93.8%。     

对现行土地管理制度的质疑

由于现行的土地公有制形式在理论上和实践上存在着模糊性 ,致使目前土地管理制度存在缺陷。通过分析现行土地管理制度所带来的负面作用 ,提出改革现行土地管理机制的两种选择思路 :其一是土地私有化 ;其二是明确国家对土地绝对占有的方式     

论稳健性原则在我国的运用

本文通过对稳健原则在我国历次会计法规、制度修订中的体现；稳健原则在我国具体实务中的运用情况和运用稳健原则应注意的问题及对策这三个方面的分析，对稳健性原则在我国的具体运用情况做了初步探讨。     

The Texaco racial discrimination case and shareholder wealth

We analyze the wealth ejfects of the Texaco racial discrimination lawsuit both on the shareholders of Texaco and its major U.S. competitors. Employing a comprehensive data set which included every case docket entry and every Wall Street Journal article on the case as an experimental stimulus, our findings suggest that the overall cost of the case to Texaco shareholders exceeded $500 million, that Texaco's tribulations had little, if any, impact on the share prices of its major competitors, and that Wall Street Journal coverage of the case was highly correlated with significant changes in Texaco stock prices. This last finding provides significant support for Hite 's suppostion that newspaper editors “key ” on ex post stock price changes in selecting the events to be covered in the next day's edition. The authors are grateful to Kee Chung for helpful comments on earlier drafts and also acknowlege the help-ful assistance of the staff of the law library at the Cecil C. Humphreys School of Law at The University of Memphis.     

论我国独立董事制度应当慎行

独立董事制度在英美法系的滥觞有其法律观念、公司制度及市场经济发达的历史底蕴与背景依托。我国推行独立董事制度还存在一定的现实障碍 ,故应慎行     

影响分析化学实验结果因素的探讨

本文探讨了影响分析化学实验结果的因素，指出溶液的酸度、试剂的浓度，用量、加入顺序和溶剂等都对分析实验的结果产生影响，并分析了其原因。     

基于视觉模型的双正交小波图像水印算法

提出了一种基于人类视觉系统模型的双正交小波多分辨图像水印算法,该算法充分利用小波多分辨的优点及人眼视觉系统的特性,保证了水印的不可见性及鲁棒性,同时在检测水印时也不需要原始图像,仅需涉及到相关的几个细节子图。实验表明该水印算法对于中值滤波、叠加加性噪声、JPEG有损压缩三种图像处理都是鲁棒的。检测算法还有计算量小,检测速度快的特点。     

A Review of Kyoto Protocol Adoption in Russia: Joint Implementation in Focus

Russia’s role in ‘animation’ of the Kyoto Protocol was crucial. Its initial vacillation on ratification was predominantly due to political bargaining with the EU. Domestic economic rationales [i.e. impacts of emission trading and Joint Implementation (JI) projects] were important to a much lesser extent and environmental motives did not seem to play any role in the decision. Since the Protocol entered into force, there have been significant delays in complete establishment of policy implementation frameworks, which are necessary for Russia to start benefiting from JI and emission trading. Only recently, in 2007, have GHG inventories and a national registry been established and the responsibilities for implementation of the Protocol and JI among the government departments have been distributed only to a certain extent. Some constraints hindering JI projects, such as vague legislation, an unfavourable economic climate, lack of commitment to JI projects, corruption, xenophobia, state and agency ‘capture’ still remain.