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   39422篇
  免费   419篇
  国内免费   528篇
安全科学   1199篇
废物处理   1749篇
环保管理   5021篇
综合类   6791篇
基础理论   10405篇
环境理论   25篇
污染及防治   10142篇
评价与监测   2596篇
社会与环境   2183篇
灾害及防治   258篇
  2023年   182篇
  2022年   364篇
  2021年   395篇
  2020年   300篇
  2019年   359篇
  2018年   613篇
  2017年   588篇
  2016年   920篇
  2015年   719篇
  2014年   1059篇
  2013年   3097篇
  2012年   1327篇
  2011年   1809篇
  2010年   1468篇
  2009年   1554篇
  2008年   1802篇
  2007年   1844篇
  2006年   1603篇
  2005年   1395篇
  2004年   1240篇
  2003年   1344篇
  2002年   1208篇
  2001年   1566篇
  2000年   1111篇
  1999年   670篇
  1998年   443篇
  1997年   467篇
  1996年   473篇
  1995年   571篇
  1994年   584篇
  1993年   474篇
  1992年   479篇
  1991年   480篇
  1990年   503篇
  1989年   462篇
  1988年   399篇
  1987年   375篇
  1986年   322篇
  1985年   325篇
  1984年   345篇
  1983年   346篇
  1982年   331篇
  1981年   317篇
  1980年   263篇
  1979年   293篇
  1978年   241篇
  1977年   187篇
  1975年   203篇
  1972年   185篇
  1971年   178篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Environment, Development and Sustainability - The current study explores the role of green trust, green perceived risk and green perceived quality in changing green purchase intention....  相似文献   
2.
Russian Journal of Ecology - A study of the anthropogenic impacts on the on-shore aggregation of true seals was carried out at a haul-out located at the mouth of Piltun Bay (the northeastern part...  相似文献   
3.
Environmental Science and Pollution Research - Heavy metals are well known for their toxicity and become significant environmental pollution with a continually rising technology and public outcry...  相似文献   
4.
Environmental Science and Pollution Research - The Fundão Dam collapsed, on November 5th, 2015, dumping more than 50 million/m3 of iron ore tailings, enriched with metals, into the Doce River...  相似文献   
5.
Environmental Science and Pollution Research - A current environmental problem is the uncontrolled use of various pesticides that are harmful to the environment and public health. The herbicide...  相似文献   
6.
Russian Journal of Ecology - Climate change entails shifts in the ranges of woody plants along both latitudinal and altitudinal gradients in the boreal forest biome. In this study,...  相似文献   
7.
This article postulates strong endogenous relationships in lower income countries between institutional quality, financial development and sustained economic growth. These associations were investigated using the vector-error correction model (VECM) and Granger causality method for a sample of 79 countries from 2005 to 2022. The findings show that (1) these variables reinforce each other in the short run. (2) In the long run, both institutional quality and financial development can fuel economic growth. (3) The positive effect of institutional quality on economic growth is greater than that of financial development. Policy implications of these findings are that careful attention should be paid to co-development policies to enhance the institutional quality and the financial system in these economies. Policies should also consider economic growth strategies to enable sustainable economic growth rates.  相似文献   
8.
Environmental Science and Pollution Research - Nutrient source and transport study in tropical creeks adjacent to megacities are sparse on a regional and global scale. High-frequency chemical data...  相似文献   
9.
Journal of Material Cycles and Waste Management - Power generation from municipal solid waste plays significant role to mitigate the environmental pollution. The power generation potential of...  相似文献   
10.
The current study is interested in evaluating the decay of cotton, Whatman and chemical pulp caused by Trichoderma harzianum and Paecilomyces variotii. The structural changes of the paper were evaluated by Infrared Spectroscopy (FTIR) and Scanning Electron Microscope (SEM). The SEM results show differences in hyphae colonization and paper decay patterns between studied species under the current study; P. variotii caused an eroded structure in the cotton (cavity forming), whereas the initial T. harzianum colonization produced rupture and erosion (soft-rot decay type II) for the three types of paper ,the gaps were elongated with sharp pointed ends, which consisted either of individual cavities or in chains. Moreover, FTIR results confirmed that there a relationship could be observed between fungal decay and crystalline cellulose content because the intensity of peaks at 1335 and 1111 cm?1 significantly decreased due to the fungal decay. Furthermore, the intensity of O–H stretching absorption slightly decreased, and this may be attributed to hydrolysis of cellulose molecules.  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