铅对小鼠脏器中微量元素的影响

为探讨铅的毒性机制 ,防治铅中毒 ,分别测定了醋酸铅染毒小鼠各脏器中铅、钙、铁、锌等金属元素含量和各脏器的脂质过氧化物 (LPO)值及血清乳酸脱氢酶 (LDH)活性 ,结果显示染铅后小鼠多数脏器中镉、钙、铁、锌浓度和LPO值及血清LDH活性均明显高于对照组 ,这表明铅对小鼠多数脏器都有毒性 ,脏器中钙、铁、锌等微量元素含量异常可能是铅引起细胞损伤的重要因素之一     

Protection performance evaluation of the respirators and personal exposure measurement in a Belgian viscose rayon factory

This paper presents the evaluation results of protective performance of the respirators (full face supplied-fresh air respirators and half-mask active charcoal filter) and personal exposure measurement (Infacepiece sampling) in a Belgian viscose rayon factory. With in-facepiece sampling technique and personal sampling method, we measured the CS₂ concentrations inside and outside of the different respirators. We found two kinds of the respirators have significant effect on decreasing the CS₂ exposure level for the subject, especially for the spinners. Full face supplied-fresh air respirator have good protective effect for the spinners and have limit protection for the high exposure job although the PF value is more than 10. It still need to improve more. In-facepiece sampling for all the subjects exposed to CS₂ in the factory found most subjects have exposed to low CS₂ concentration, most exposure levels were under the control range, but sulfuror are high exposure, the exposure level is higher than ACGIH TLV value. Supported by the Belgian Science Research Office, (DWTC, Belgium) under contact number ST/02/034 Tan Xiaodong: born in 1963, Associate professor, Medical doctor and Master of Public Health     

城市中心城区产业结构调整与土地利用演变

本文关注我国体制转型期的城市发展 ,从市场经济体制下城市中心产业结构的调整入手 ,分析其引起的土地利用结构变动 ,提出了城市土地利用的基本对策。     

跨世纪常德市产业布局与区域发展

根据常德市国土资源条件、区位优势、社会经济发展现状 ,提出了常德市 2 1世纪产业布局的思路 :实行点轴开发 ,促进“工”型产业带形成 ;加强城镇建设 ;优化农业产业结构。区域产业布局的方向和重点是“三大产业带”与“一个中心”。     

The Experience of Industrial Districts Construction in Yokohama City-A Useful Reference for Shanghai Urban Planning

Shanghai and Yokohama are very similar in the positions in their respective state economy and in the orbit of eco-nomic structure development. Since industrial districts in Yokohama city were established dozens years earlier than Shanghai, the experience of Yokohama must be very useful for Shanghai urban planning.     

经济型喷涂机器人控制器

介绍了经济型喷涂机器人实时控制系统，包括软件和硬件，它适合示教／再现型机器人，是在ＳＴＤ工控机基础上开发的多ＣＰＵ、多轴联动实时控制器     

服务经济的再定义、特征及新分类解析

针对服务经济定义与经济现实之间的矛盾，研究人员可从服务经济的定义、基本特征分析入手，对服务产业重新分类，并对产业结构的服务化、服务生产的模块化与定制化等进行诠释，从服务经济构成机理的角度提供对工业经济、服务经济同时快速增长这一现象的全新解释。     

煤层含气量测定技术应用探讨

借助煤层气井开发的多年经验,初步探讨了煤层含气量测定中所遇到的问题。从气含量测定、煤层气成分分析、煤质工业分析等三方面出发,阐述了探区煤层气开发前需进行的各项气含量分析工作,为煤层气大面积开发提供重要技术数据,并可进行有利选区、优化井型设计。     

中兴期煤炭资源型城市产业并行发展模式初探

随着市场经济的发展,我国煤炭资源型城市迎来了前所未有的困难与压力。我国煤炭资源型城市如何在自身存在诸多困难的情况下,谋求生存和发展,以实现煤炭资源型城市的可持续发展,成为我国煤炭资源型城市需要解决的首要问题。     

对城郊新农村建设的思考

分析了城郊村的地理特点、发展的现状及存在的问题,并从几方面提出了合理化建议.