排序方式: 共有53条查询结果,搜索用时 15 毫秒
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Moens LN Smolders R van der Ven K van Remortel P Del-Favero J De Coen WM 《Chemosphere》2007,67(11):2293-2304
Effluents are a main source of direct and continuous input of pollutants to the aquatic environment, and can cause ecotoxicological effects at different levels of biological organization. Since gene expression responses represent the primary interaction site between environmental contaminants and biota, they provide essential clues to understand how chemical exposure can affect organismal health. The aim of the present study was to investigate the applicability of a microarray approach for unraveling modes of action of whole effluent toxicity and impact assessment. A chronic toxicity test with common carp (Cyprinus carpio) was conducted where fish were exposed to a control and 100% effluent for 21 days under flow-through conditions. Microarray analysis revealed that effluent treatment mainly affected molecular pathways associated with the energy balance of the fish, including changes in carbohydrate and lipid metabolism, as well as digestive enzyme activity. These gene expression responses were in clear agreement with, and provided additional mechanistic information on various cellular and higher level effects observed for the same effluent. Our results demonstrate the benefit of toxicogenomic tools in a “systems toxicology” approach, involving the integration of adverse effects of chemicals and stressors across multiple levels of biological complexity. 相似文献
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文章研究了C/N对悬浮填料生物反应器脱氮效果的影响。出水中NH4+-N、NO2--N和NO3--N浓度以及pH值变化均受C/N的影响,实验得到的最佳C/N质量比为12∶1,TN去除率平均在85%。 相似文献
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人类社会不断发展,离不开矿山地质资源开发和利用,本文对加强矿山地质环境恢复治理模式创新的意义进行了简要分析,着重探讨了加强矿山地质环境恢复治理模式创新的具体做法,以供参考。 相似文献
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Car users underestimate their potential satisfaction with public transport due to a focusing illusion (i.e., focusing on a too narrow range of aspects related to the focal event). To investigate whether a defocusing technique would increase car users’ predicted satisfaction with public transport, the effects of defocusing techniques, generic (Study 1) and self-relevant (Study 2), were investigated. In Study 1 (estimate daily time spent on ten pre-selected activities), the generic defocusing technique did not generate higher predicted satisfaction with public transport. In Study 2, the self-relevant defocusing technique generated higher predicted satisfaction on quality attributes, namely satisfaction with the number of departures, the number of available seats and the condition of the vehicles, in comparison with controls. It is concluded that the self-relevant defocusing technique applied in Study 2 (state your various everyday activities and describe how much time you engage in them) was successful in making car users take into account activities in life that will remain unchanged if they were to use public transport for their daily travel. Additionally, in Studies 1 and 2, it was found that car-use habit, regardless of the experimental condition, influenced the magnitude of predicted satisfaction, that is, the higher the car-use habit, the lower the predicted satisfaction with public transport. 相似文献
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郝素琴 《中国环境管理干部学院学报》2003,13(2):20-23
发展生态农业是改善农业生态环境、实现农业可持续发展的有效途径。本文根据河北省农业和农村经济的发展水平、农业资源以及环境状况,提出了一些适宜河北省发展的生态农业模式。 相似文献
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浅谈以公共交通为导向的土地利用模式 总被引:1,自引:0,他引:1
彭立新 《中国环境管理干部学院学报》2003,13(2):37-39
本文通过对城市土地利用和城市交通规划相互关系的分析,探讨解决城市交通问题的合理用地模式,提出了要以公共交通来引导城市土地的利用,并探讨了在我国建立公共交通导向的城市土地利用形态的策略与途径。 相似文献
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沈阳市铁西新区生态工业园规划与研究 总被引:2,自引:0,他引:2
结合老工业基地改造,构建新型经济发展模式,变过去传统资源—产品—污染排放的单向流动线性经济为“资源—产品—再生资源”的反馈式经济模式。从而达到节约资源、削减污染、提高经济运行质量和效益的目的,实现整个区域的可持续发展,促进园区生态系统良性循环,建设新型生态工业园区。 相似文献
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关于RosinRammler粒径分布函数的研究 总被引:1,自引:0,他引:1
Rosin Ramm ler分布函数是最常用的描述粉尘粒径分布的一种形式 ,本文对表达式中系数 a与指数 n之间的关系进行了分析 ,导出了二者之间的关系式。 相似文献