2种拟除虫菊酯类农药对赤子爱胜蚓消化酶的毒性效应

拟除虫菊酯类农药已经逐渐代替有机磷等农药被大量使用,给土壤动物带来潜在生态风险.本研究选择了土壤模式生物赤子爱胜蚓为受试生物,考察2种拟除虫菊酯类农药(联苯菊酯和氟氯氰菊酯)对赤子爱胜蚓消化酶活性(α-葡萄糖苷酶和蛋白酶)的影响.结果表明,α-葡萄糖苷酶(α-Glu)活性在暴露初期被联苯菊酯诱导,随着时间的延长,出现抑...     

Currently used organophosphate and brominated flame retardants in the environment of China and other developing countries (2000–2016)

This review summarizes the environmental occurrence of new brominated flame retardants (NBFRs) and organophosphate compounds (OPs) in the environment of developing countries since 2000. The ban on the production and use of commercial formulations of polybrominated diphenyl ethers (PBDEs) have paved the way for the high use of NBFRs and OPs in consumer products to fulfill the fire safety regulations. Recent studies have shown that the ever increasing production volumes and extensive use of these chemicals as additive FRs and plasticizers have resulted into their ubiquitous occurrence in all environmental compartments. Although presumed to be safe for use and the environment, recent studies on their occurrence and persistence in the environment have raised questions. Due to the lack of awareness, research interest, and availability of technical facilities, limited scientific data is available on the occurrence of these chemicals in developing countries. In this study, we collected reported data and provide an overview of environmental occurrence of NBFRs and OPs in abiotic and biotic matrices of different developing countries. Finally, research gaps were identified with recommendations for future research work and would be useful towards the environmental management of these toxic chemicals.     

焦炉地下室CO微机监控系统

针对焦炉地下室易发生CO泄漏事故的现状，在深入分析炼焦工艺的机理，煤气和CO的性质和成因后，研制出一套一氧化碳微机监控系统，并较为详细地叙述了控制系统的研究对象、研究内容、设计思想和实现过程。     

特大型矿产资源开发与区域经济发展——以西藏玉龙铜矿资源开发为例

矿产资源,特别是特大型矿的开发对区域经济发展具有重要的带动作用。西藏玉龙铜矿在国内仅次于德兴铜矿的特大型矿山,它的开发具有重大战略意义,有利于带动昌都地区经济的发展,本文认为开发玉龙铜矿既面临着矿产资源开发机制、模式及矿产开发区功能与结构等一系列重大变革,又出现许多有利条件和不利因素。必须面向下一世纪和国内外两个市场,按照新的机制,选择融合式发展,努力建立一个综合功能型的昌都地区经济。     

Social and Economic Factors in the Spread of the NIMBY Syndrome against Waste Disposal Sites in Taiwan

The paper analyses the NIMBY syndrome against solid waste disposal sites in Taiwan and argues that the rapid growth of this syndrome has been attributable to three social and economic factors, namely: (1) The awakening of public environmental consciousness; (2) the increase in the value of urban marginal land; and (3) the process of political liberalization and the uprising of so-called 'self-help actions' from the public.     

拉延成形中拉延筋的摩擦分析

此文建立了一种用拉延筋单元模拟试验器测试拉延筋摩擦系数的方法,同时对成形中的摩擦润滑进行了试验研究和分析。     

长江口北支潮汐能开发与配套政策浅议

据调查,长江口北支蕴藏着丰富的潮汐能资源,装机总容量为70万kW,年发电量为23亿度.潮汐能是一种清洁的可再生能源,北支潮汐能的开发将使上海的能源结构得到改变,减少二氧化硫的排放量.为了尽快有效地开发北支潮汐能,建议上海市政府制订一部激励、推动新能源开发利用的具有法律效力的政策法规.     

废水处理中的几种廉价吸附剂

介绍了废水处理中具有良好实际应用价值的几种性能良好的廉价吸附（粉煤灰、混炭和膨润土等），对它们的作用机理、处理效能及应用前景进行了分析。     

Field measurements of dissociation of ammonium nitrate at a Beijing site

The atmospheric nitric acid, ammonia and ammonium nitrate aerosol was determined simultaneously in a Beijing site to teste quilibrium. Rather good agreement between measurements and theory was found at ambient temperature above 9oC at relative humidity below 70%. Below 9oC the kinetic constraints preventing rapid attainment equilibrium were observed. A procedure for calculation of dependence of NH4NO3 aerosol dissociation constants on temperature and relative humidity was given. The seasonal variation of concentration of NH3, total NH4+ and HNO3 was observed.The seasonal variation of concentration of HNO3 was caused by dissociation of aerosol of NH4NO3. The concentrations of NH3 were 1-2 order higher than those of HNO3. For formation of NH4NO3 aerosol the HNO3 was the control reagent. Any increase of HNO3 to formed from NOx would react with NH3 form NH4NO3 aerosol in Beijing area except for someday in summer time.     

网络结构有利于城市可持续发展

城市结构类型分为传统的层次结构和新近发展的网络结构，网络结构有利于城市土地的科学利用，有利于城市的生态建设，有利于城市环境质量的改善，有利于城市的可持续发展。