大窑湾疏浚水环境要素变化特征及其相关关系

根据大窑湾后６个泊位疏浚工程本底调查和疏浚监测结果，借助因子分析探讨了疏浚前后水环境要素的变化特征及相关关系，找出了控制污染物分布的主要因子，评价了疏浚对海洋环境的影响。     

Spontaneous abortion after transcervical chorionic villus sampling: A case report

A case of spontaneous abortion after transcervical CVS is presented. Despite no evidence of bacteria in the vagina and cervix prior to sampling and the prophylactic use of Metronidazole, pathological evidence of chorioamnionitis was found. The implications of this are discussed.     

楚雄市饮用水源水质分析与保护措施

介绍了楚雄市饮用水源的水质情况,分析了饮用水源地主要污染源及水环境问题,并初步提出了环保对策与措施。     

抚顺市空气可吸入颗粒物特征的研究

于2002年1～7月份在抚顺市区四个点位采集了环境空气中的可吸入颗粒物样品，经分析后获得了可吸入颗粒物组分的时间分布和空间分布特征，即采暖期PM10样品中有机碳（OC）、元素碳（EC）的绝对含量和相对含量均高于非采暖期，工业区PM10样品中的Fe、Zn、Pb的绝对含量和相对含量均明显高于其它点位，反映了其工业区的特点。     

铁路运输安全事故灰色预测方法研究

近年来 ,我国铁路运输发展迅猛 ,尤其是列车运行多次提速 ,列车运行密度加大 ,对铁路运输安全管理不断提出了新的要求。依靠科技进步 ,尽量防止或减少安全事故的发生 ,要应用安全信息技术 ,使安全管理人员对铁路运输安全现状及未来事故发展趋势有所了解 ,提高安全防范意识及事故处理能力 ,同时还要不断提高员工的安全意识和安全文化素质 ,这些方法对于提高安全管理水平 ,降低事故的发生 ,保护人民的生命安全与健康具有重要意义。铁路运输安全事故预测技术就可很好解决上述问题。笔者应用灰色预测理论 ,建立了铁路运输安全事故预测模型 ,开发了安全事故预测软件系统 ,并以某铁路运输企业为例 ,介绍了研制的灰色预测系统软件的应用效果     

滤膜法测定空气中氟化物的改进

测定环境空气中微量氟的方法一般采用滤膜法，但此法工作量大，针对这种情况，本文作两点改进：一是将采集的两张滤膜同时测定；二是将测定过程中的搅拌时间缩短，这样不影响测定结果的准确性，而且降低了工作量。     

乌鲁木齐空气微生物含量的测定

用自然平皿沉降法对乌鲁木齐市13个室内外空气测点作了微生物含量的测定,结果表明平均室外空气的细菌、真菌、总菌含量及F/T%分别为28583 8、780 5、29364 3CFU·m-3及2 7,证实了该市空气处于中度微生物污染状态。少量测点显示其空气已受到严重污染,空气质量不佳。室内空气微生物污染也重。空气微生物污染以细菌为主。分析了室外空气微生物含量的时空分布特点差异,探讨了其成因,并与其他城市作了比较。文章指出增强环境忧患意识,采用切实而有效措施,减少环境污染的必要性。     

Genetically Modified (GM) Crops: Precautionary Science and Conflicts of Interests

Risk governance of GM plants and GMfood products is presently subject to heatedscientific and public controversies. Scientistsand representatives of the biotechnologyindustry have dominated debates concerningsafety issues. The public is suspicious withregard to the motives of scientists, companies,and political institutions involved. Thedilemmas posed are nested, embracing valuequestions, scientific uncertainty, andcontextual issues. The obvious lack of data andinsufficient information concerning ecologicaleffects call for application of thePrecautionary Principle (PP). There are,however, divergent opinions among scientistsabout the relevance of putative hazards,definition of potential ``adverse effects,' andwhether actions should be taken to preventharm. The reliance on the concept ofsubstantial equivalence in safety evaluation ofGM food is equally controversial. Consequently,value assumptions embedded in a scientificframework may be a barrier for employment ofthe PP. One of our major conclusions is thatprecautionary GMP usage requires riskassessment criteria yet undeveloped, as well asbroader and more long-term conceptions of risk,uncertainty, and ignorance. Conflicts ofinterest and public participation are otherissues that need to be taken intoconsideration. GMP governance regimes that arejustifiable from a precautionary and ethicalpoint of view must transcend traditionalscientific boundaries to include alternativescientific perspectives as well as publicinvolvement.     

Possible Utilization of Silica Gel Sludge for the Removal of Phenol from Aqueous Solutions: Laboratory Studies

This paper discusses the adsorption capacity of silica gel sludge for phenol removal from aqueous solution. Kinetic experiments showed that phenol adsorption was completed after 2 h. Adsorption isotherms were measured for phenol from aqueous solution onto silica gel sludge under various pHs and temperatures. Results showed that the adsorption capacities for phenol was increased as pH decreased from 6.5 to 2. Temperature also was found to affect the adsorption isotherm. As temperature increases from 30 to 50°C, the adsorption capacity increases. The adsorption equilibrium of phenol on silica gel sludge was described by the linear Freundlich and Langmuir models. Furthermore, results showed that the isotherm parameters fit both linearized Langmuir and Freundlich adsorption isotherms. The Freundlich and Langmuir parameters at optimum pH was found as K _f=2.89, 1/n=0.23 and K _d=22.0, q _m=7.98, respectively. Whereas, for those at optimum temperature it was observed as K _f=2.87, 1/n=0.16 and K _d=20.93, q _m=7.91, respectively.     

车用三效催化剂的研究进展

三效催化剂是机外治理机动车尾气污染最常采用的有效方法，车用三效催化剂已发展到第4代。目前车用三效催化剂的研究主要集中在：开发稀燃型三效催化剂和紧耦合三效催化剂及发展三效催化剂低温冷起燃技术等。国内应以稀土添加少量贵金属的三效催化剂为主要研究方向，开发适合我国现状的车用净化催化剂技术。