二草酸根二氧钒酸铵配合物在氢气中热分解机理研究

用程序升温气相色谱法，配合ＥＳＲ，ＩＲ等手段，研究了二草酸根二氧钒酸铵配合物在氢气气氛中的热分解机理，并讨论了负载型体系中，载体（γ－Ａｌ２Ｏ３、ＳｉＯ２、ＭｇＯ）对配合物热分解的影响．     

The persistent anomaly of summertime circulation over the Ural Mountains

The tropical heating and transient activity features during the period of the persistent anomaly of summertime circulation over the Ural Mountains are studied, and a possible mechanism responsible for formation and maintenance of persistent anomalies is proposed. The mechanism can be summarized as a kind of self-sustaining through a two-way interaction of stationary wave with transient eddies under the consistent forcing of abnormal heating in the tropics.     

振动过程的数值模拟实验

利用数学问题的通用软件包Mathematica，设计出一组新颖的数值模拟实验，可以有效地帮助学生通过自己探索来了解和掌握振动过程的规律，促进学生创新精神和实际能力的培养。     

遗传算法中模式空间结构的研究

通过引入模式的线性表示概念，给出了模式空间的独立性及线表示式。     

The DNA concentration effect on DNA radiation damage induced by <Superscript>7</Superscript>Li ions and γ rays

To evaluate the influence of the DNA concentration in the aqueous solution on DNA radiation damage, the plasmid DNA in the presence or absence of Mannitol （scavenger of free radical OH.） was irradiated by ^7Li ions and γ rays at various DNA concentrations. Gel electrophoresis analysis revealed that the DNA damage of single and double strand breaks induced by irradiation became more severe at lower DNA concentration. In the condition of γ-ray irradiation, most of double strand breaks （DSB） damage was neutralized and less associated with DNA concentration in the presence of mannitol. However, under ^7Li irradiation, DSB damage could not be cleared by mannitol but was gradually aggravated with decreasing DNA concentrations. These findings imply that under low-LET irradiation, most of the DSB damage is generated by free radical OH·diffusion, and thus may be counteracted by scavengers, while at higher-LET irradiation, quite a fraction of DSB induction is caused by direct ionizing energy deposition of heavy ions, which cannot be eliminated. This work also indicates that the proportion between free radical damage and direct ionizing damage is s constant which is independent of DNA concentration when the DNA concentration is under a certain value （50ng/μL）. Our study sheds light on the un- derlying mechanisms in the DNA radiation damage process.     

牛奶蛋白纤维的组成与结构研究

通过氨基酸分析、红外光谱、X射线衍射及SEM扫描电子显微镜研究了牛奶蛋白纤维的组成及形态与聚集态结构,并与腈纶和大豆蛋白纤维进行了比较.结果表明,牛奶蛋白纤维含有17种氨基酸,占纤维总质量的24.86%;红外光谱表明牛奶蛋白纤维是由酪素与丙烯腈共同组成的;牛奶蛋白纤维的结晶度为45.22%,其横截面呈不规则状,纵向有沟槽.     

Existing Problems and Suggestions in the Use of “宜农荒地” (yinonghuangdi)

一、问题的提出 从上世纪50年代以来,中央与地方有关的专著、科研报告、区划、规划、计划中,以及文后所列文献(1～8)中,都广泛使用“宜农荒地”或“宜农(耕)荒地”这一复合词.该词在……     

《电子商务》课程和教学改革初步探讨

电子商务自90年代以来在世界各地得到了迅猛的发展。它正以惊人的速度给众多领域带来了深刻的社会变革,不断改变着我们的生产方式、生活方式和思维方式。与此同时,电子商务也带来了课程和教学的巨大变革。抓住这个机遇,按照市场需求培养应用型人才,是应用性大学寻求改变传统教学的出路所在。为此,我们以电子商务(电信专业)为例,对所设置专业课程和教学进行初步探讨,以期望调整课程设置、改进教学方法和培养社会需要的人才。在教学过程中,正确处理和使用互联网将会对教学产生积极的影响。