An SNP polymorphism（-844C／T） in the promoter of catalase gene leads to differential expression

Imbalance of redox state has been associated with human diseases, such as cardiovascular diseases, Huntington‘s disease and Alzheimer‘s disease. Catalase, an important antioxidant enzyme, decomposes H202 into O2 and H2O, therefore limiting the deleterious effect of the reactive oxygen species (ROS). Previous study showed that a C-T polymorphism, located at -844 bp from the translational start site of catalase, is strongly associated with essential hypertension in an isolated Chinese population of Xiangchang country, Anhui Province. To explore the impact of SNP-844C/T on the expression of catalase, human catalase promoters containing either SNP-844C or T variant were subcloned into the pGL3Basic luciferase vector.     

Photocatalytic effect of nature and modified V-bearing rutile

A natural rutile TiO2, which displays photocatalysis on degrading halohydrocarbon pollutants, was reported. The rutile contains up to 1.22% V2O5 (weight percent). Substitutions of Ti by V, as well as Fe, Cu and Zn, result in lattice distortions and defects. Grinding, heating and quenching modify the surface characteristics of ruffle, and consequently increase its photoactivity. It is found that the heating and quenching treatments enhance visible-light absorption of ruffle, especially at 1000 and 1100℃. Ground rutile is effective to degrade tetrachloroethylene and trichloroethylene. While, heating at 1000℃, and quenching at 1000 and 1100℃ distinctly improve degradation rate of samples. The special properties of the natural rutile have particular capabilities in photocatalytic oxidation, especially in degradation of halohydrocarbons.     

系统科学与复杂网络研究

从模型的角度出发，分析系统科学所讨论的几类模型，总结研究这些模型的主要概念和主要方法；依据当前复杂网络研究的实际，提出系统科学和复杂网络结合研究的思路、具体方法、应注意的问题。     

基于ExSpect的复杂离散事件动态系统建模

随着petri理论与应用研究的不断发展，petri网已经成为离散事件动态系统建模和分析的有力工具。采用petri网对复杂离散事件动态系统进行建模和分析，没有一套科学的建模方法指导和有力的软件支持是不可能实现的。介绍了基于Petri网的可执行的规格说明语言Exspect及其软件，提出了基于Exspect的复杂离散事件动态系统建模的方法，并进行了实例研究。     

英国动物性食品安全研究现状及我国优先发展领域

本文介绍了英国等欧盟国家的动物性食品安全研究现状;探讨了我国目前在动物性食品安全研究中存在的问题;并从残留代谢组学、营养基因组学、动物性食品功能基因组学、动物性食品病原微生物、疯牛病检测技术及动物源食品安全相关的环境生态学研究等方面,提出了我国动物性食品安全的优先研究领域。     

DFG Delegation Visited China

At the invitation of NSFC, the DFG delegation, led by its President Prof. Ernst-Ludwig Winnacker, paida visit to China from Apr. 9 to 19, 2005. Members of the delegation include Prof. Frank Steglich, Vice Presi-dent of DFG and Dr. Axel-Hubertus Zienicke, the Deputy Secretary General, etc.Prof. Chen Yiyu, President, Prof. Zhu Zuoyan, Vice President, and Prof. Wang Jie, Vice President ofNSFC met with the delegation on April 11. Prof. Chen first briefed the delegation about the…     

Urban Integrated Transportation Planning Based on Transit Oriented Development and its Research Challenges

Satisfying the increasing traffic demand with the least amount of resource and environmental costs, the sustainable development object of urban traffic system determines that from long-term viewpoint, it is necessary to establish urban integrated traffic planning system with public transport as it is. The planning idea of Transit Oriented Development (TOD) is an important method to realize urban integrated traffic planning system. Research and practice reveal that harmony and integration is the key method to solve urban traffic problems. The integration of traffic system and land-use is the basic problem. Urban traffic development strategy with TOD provides ideas and ways to harmonize the traffic and land-use systems, which brings out a series of new research subjects and challenges in the field of traffic planning.     

水泥稳定碎石基层施工质量的控制

本文从水泥稳定碎石基层施工质量控制中的材料控制、施工控制、强度检测控制、成型路面养护及封闭交通方面以分别阐述。     

基于自识别水印模式的抗几何攻击水印算法研究

提出了一种不依赖于同步性的抗几何攻击的水印算法,通过对水印模式结构进行精心设计,使得其自身具有可识别性,通过对不同结构的水印模式进行识别,从而判断对应的水印信号.算法从根本上消除了同步性的依赖,也不需要对图像进行区域剖分和规范化,因此大大节省计算消耗.实验结果表明,该水印算法对旋转、缩放、裁剪、改变纵横比等几何操作具有鲁棒性,同时对高斯噪声、低通滤波等信号处理操作也具有鲁棒性.     

我国旅行社实施CRM的思考

介绍了客户关系管理(CRM)的概念及内涵，通过对我国旅行社客户关系管理现状的分析，提出了我国旅行社实施CRM系统的两种基本策略，即自行建设策略和外包策略，并探讨了实施CRM时应处理好的几个问题。