首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   153篇
  免费   1篇
  国内免费   3篇
安全科学   3篇
废物处理   6篇
环保管理   6篇
综合类   13篇
基础理论   30篇
污染及防治   61篇
评价与监测   27篇
社会与环境   11篇
  2022年   14篇
  2021年   27篇
  2020年   2篇
  2019年   3篇
  2018年   4篇
  2017年   3篇
  2016年   7篇
  2015年   3篇
  2014年   8篇
  2013年   16篇
  2012年   2篇
  2011年   12篇
  2010年   6篇
  2009年   2篇
  2008年   6篇
  2007年   7篇
  2006年   1篇
  2005年   2篇
  2004年   1篇
  2003年   1篇
  2002年   5篇
  2001年   1篇
  2000年   4篇
  1999年   1篇
  1998年   2篇
  1997年   1篇
  1996年   1篇
  1994年   1篇
  1993年   2篇
  1992年   1篇
  1985年   1篇
  1984年   1篇
  1982年   1篇
  1981年   1篇
  1964年   1篇
  1963年   2篇
  1962年   1篇
  1961年   1篇
  1959年   2篇
排序方式: 共有157条查询结果,搜索用时 15 毫秒
141.
Environmental Science and Pollution Research - The willingness to pay (WTP) plays a central role in directing appropriate policy regarding ambitious renewable energy targets. Based on this...  相似文献   
142.
Further Results on Permit Markets with Market Power and Cheating   总被引:4,自引:0,他引:4  
This paper examines a market for pollution permits in which one firm has market power and one or more firms is noncompliant. I show that the firm with market power may choose to hold more permits than it needs, effectively retiring permits from the market. I also show that some noncompliance may be socially desirable because it can mitigate the distortion caused by market power. Similarly, some degree of market power may be socially desirable because it can, in turn, mitigate the distortion caused by noncompliance.  相似文献   
143.
J. P. Lay  J. K. Malik  W. Klein  F. Korte 《Chemosphere》1982,11(12):1231-1242
The biotransformation and elimination of 14C-dieldrin (HEOD) in non-acute toxic concentrations were investigated in male rats. A population of 36 rats was divided into two equal subgroups which were either exposed intraperitoneally (i.p.) or orally to 0.01, 0.1, 1.0 mg dieldrin/kg body weight on five consecutive days. 74–84 percent of the cumulative doses were eliminated via faeces and urine within 14 days for all groups. However, the daily excretion of dieldrin-derived residues, calculated as percent of the amount actually stored in the tissues, was significantly different between orally and i.p. treated groups. Also relatively large differences in the kinetic of excretion were found in the beginning of the experiment among individuals of the entire test population and among the six exposure groups. Ninety percent of the radioactive carbon compounds, excreted with urine and faeces, were extracted, purified and chromatographed with T.L.C. techniques. Four major radioactive fractions were isolated and identified from faecal and renal extracts of each group. Comparative studies of the nature (GLC-MS) and of the quantity (T.L.C./G.L.C.) of the metabolites and the parent compound indicated no significant differences in the pattern of metabolism as a consequence of different doses and/or routes of administration.  相似文献   
144.
In this review a brief introduction to thiram (tetramethylthiuram disulfide; TMTD) pesticide has been given along with other applications. All the important methods available are systematically arranged and are listed under various techniques. Some of these methods have been applied for the determination of thiram in commercial formulations, synthetic mixtures in grains, vegetables and fruits. A comparison of different methods is the salient feature of this review.  相似文献   
145.
Laboratory studies utilizing radioisotopic techniques were conducted to determine the adsorption, desorption, and mobility of endosulfan (6,7,8,9,10,10-hexachloro-1,5,5a,6,9,9a-hexahydro-6,9-methano-2,4,3-benzodioxanthiepin3-oxide) and methamidophos (O,S-dimethyl phosphorothioate) in sandy loam and clay soils of the Cameron Highlands and the Muda rice-growing area, respectively. High Freundlich adsorption distribution coefficients [Kads(f)] for endosulfan (6.74 and 18.75) and low values for methamidophos (0.40 and 0.98) were obtained in the sandy loam and clay soils, respectively. The observed Koc values for endosulfan were 350.85 (sandy loam) and 1143.19 (clay) while Koc values of 20.92 (sandy loam) and 59.63 (clay) were obtained for methamidophos. Log Kow of 0.40 and 1.25 were calculated for endosulfan as well as -1.96 and -1.21 for methamidophos in the sandy loam and clay soils, respectively. Desorption was common to both pesticides but the desorption capacity of methamidophos from each soil type far exceeded that of endosulfan. Soil thin layer chromatography (TLC) and column studies showed that while methamidophos was very mobile in both soils, endosulfan displayed zero mobility in clay soil.  相似文献   
146.
Oral administration of 0.7 mg/kg/day of quinalphos to mals buffalo calves for 28 consecutive days produced marked inhibition of erythrocyte acetylcholinesterase and elevation in serum levels of aminotransferases and phosphatases without inducing apparent toxicity. The enzymic alterations were more pronounced following 1.4 and 2.1 mg/kg/day doses of quinalphos, which were lethal within 4–17 days.  相似文献   
147.
148.
149.
Environmental Science and Pollution Research - This study examines the association among the green energy production (GEP), green technological innovation (GTI), and green international trade (GIT)...  相似文献   
150.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号