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   1149篇
  免费   8篇
  国内免费   28篇
安全科学   11篇
废物处理   56篇
环保管理   147篇
综合类   98篇
基础理论   196篇
污染及防治   405篇
评价与监测   209篇
社会与环境   61篇
灾害及防治   2篇
  2023年   33篇
  2022年   75篇
  2021年   60篇
  2020年   12篇
  2019年   26篇
  2018年   38篇
  2017年   34篇
  2016年   53篇
  2015年   27篇
  2014年   49篇
  2013年   146篇
  2012年   55篇
  2011年   63篇
  2010年   50篇
  2009年   47篇
  2008年   64篇
  2007年   43篇
  2006年   43篇
  2005年   34篇
  2004年   31篇
  2003年   29篇
  2002年   20篇
  2001年   17篇
  2000年   9篇
  1999年   10篇
  1998年   4篇
  1997年   7篇
  1996年   6篇
  1993年   5篇
  1992年   7篇
  1991年   8篇
  1990年   3篇
  1989年   5篇
  1988年   3篇
  1987年   8篇
  1986年   4篇
  1984年   2篇
  1982年   5篇
  1980年   2篇
  1978年   4篇
  1976年   6篇
  1975年   4篇
  1974年   2篇
  1972年   3篇
  1969年   5篇
  1968年   4篇
  1965年   2篇
  1959年   2篇
  1957年   3篇
  1956年   2篇
排序方式: 共有1185条查询结果,搜索用时 625 毫秒
501.
Environmental Science and Pollution Research - The human coronavirus disease (COVID-19) pandemic is caused by a novel coronavirus; the Severe Acute Respiratory Syndrome Coronavirus (SARS-CoV-2)....  相似文献   
502.
Environmental Science and Pollution Research - This work presents a novel approach for a double-slope solar desaltification system having parallel array of evacuated annular tube collectors with...  相似文献   
503.
Environmental Science and Pollution Research - The effects of a composite polyphenolic-rich extract (CPRE) on ruminal fermentation, nutrient utilisation, growth performance, excretion of nitrogen...  相似文献   
504.
Environmental Science and Pollution Research - Vasoactive intestinal peptide (VIP) is a neuropeptide that is produced by the lymphoid cells and plays a major role in immunological functions for...  相似文献   
505.
Environmental Science and Pollution Research - The RhoA gene showed an important genotypic association with nicotine dependence and smoking initiation. The current study aims to investigate the...  相似文献   
506.
Environmental Science and Pollution Research - When diabetes neuropathy occurs, the oxidative stress caused by chronic hyperglycemia may result in chronic neuronal damage. To mitigate the effects...  相似文献   
507.
Environmental Science and Pollution Research - Himalaya, the highest mountain system in the world and house of important biodiversity hotspot, is sensitive to projected warming by climate change....  相似文献   
508.
ABSTRACT: The parameters of the extreme value type 1 distribution were estimated for 55 annual flood data sets by seven methods. These are the methods of (1) moments, (2) probability weighted moments, (3) mixed moments, (4) maximum likelihood estimation, (5) incomplete means, (6) principle of maximum entropy, and (7) least squares. The method of maximum likelihood estimation was found to be the best and the method of incomplete means the worst. The differences between the methods of principle of maximum entropy, probability weighted moments, moments, and least squares were only minor. The difference between these methods and the method of maximum likelihood was not pronounced.  相似文献   
509.
Eapen S  Singh S  Thorat V  Kaushik CP  Raj K  D'Souza SF 《Chemosphere》2006,65(11):2071-2073
Potential of plants to remove radionuclides/toxic elements from soils and solutions can be successfully applied for removal of important radionuclides such as strontium-90 (90Sr) and cesium-137 (137Cs). When uptake of 137Cs and 90Sr by Calotropis gigantea plants incubated in distilled water spiked with the radionuclides either alone or in combination was studied, it was found to have a high efficiency for the removal of 90Sr, with 90% being removed from solutions (5 × 103 kBq l−1) within 24 h of incubation. However, in case of 137Cs, about 44% could be removed from solutions (5 × 103 kBq l−1) at the end of 168 h of incubation. Accumulation of 90Sr and 137Cs was higher in roots compared to shoots. The plants could remediate both 90Sr and 137Cs when they were added together to the solution. When two months old plants were incubated in low level nuclear waste, 99% of activity disappeared at the end of 15 days. The present study suggests that C. gigantea could be used as a potential candidate plant for phytoremediation of 90Sr and 137Cs.  相似文献   
510.
Male Heteropneustes fossilis were exposed for 30 days at sublethal concentration (0.002 ppm) during different phases of its annual reproductive cycle. Its impact on total phospholipids (TP), phosphatidylcholine (PC), phosphatidylserine (PS), phosphatdylinositol (PI) and phosphatidylethanolamine (PE) were measured in liver, plasma and testes. During preparatory phase, in general, the levels for TP, PC, PS, PI and PE decreased after endosulfan exposure in the above tissues. During prespawning and spawning phases, the phospholipids also showed decreasing trend. The postspawning phase, exhibited decline in hepatic levels of PS and PI only and remained unaffected in the other two tissues. During the resting phase too, the hepatic levels of TP, PS and PI declined and remained unaltered in others. The present results indicate that endosulfan have very selective effects on phospholipids classes during different phases of the annual reproductive cycle interfering with the production of lipid deprived energy i.e. vitellogenin. In general, endosulfan has inhibitory role during reproductive growth affecting phospholipid biosynthesis via hepatic enzyme systems as well as by hormonal imbalance.  相似文献   
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