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   298篇
  免费   7篇
  国内免费   6篇
安全科学   4篇
废物处理   18篇
环保管理   30篇
综合类   25篇
基础理论   52篇
污染及防治   98篇
评价与监测   53篇
社会与环境   27篇
灾害及防治   4篇
  2023年   7篇
  2022年   20篇
  2021年   15篇
  2020年   5篇
  2019年   10篇
  2018年   11篇
  2017年   10篇
  2016年   19篇
  2015年   7篇
  2014年   18篇
  2013年   38篇
  2012年   8篇
  2011年   16篇
  2010年   27篇
  2009年   10篇
  2008年   13篇
  2007年   8篇
  2006年   9篇
  2005年   16篇
  2004年   5篇
  2003年   8篇
  2002年   5篇
  2001年   2篇
  2000年   7篇
  1999年   1篇
  1998年   1篇
  1994年   3篇
  1992年   1篇
  1988年   1篇
  1985年   2篇
  1984年   1篇
  1978年   1篇
  1963年   3篇
  1962年   1篇
  1955年   1篇
  1954年   1篇
排序方式: 共有311条查询结果,搜索用时 15 毫秒
301.
Environmental Science and Pollution Research - An increasing amount of electronic waste (e-waste) is not a new concern. It has been causing trouble globally. This waste comprises valuable metals...  相似文献   
302.
Environmental Science and Pollution Research - The rapid degradation, overexploitation, and encroachment of floodplain wetlands have led to considerable decline in fish diversity and production...  相似文献   
303.
Environmental Science and Pollution Research - Global agriculture is facing tremendous challenges due to climate change. The most predominant amongst these challenges are abiotic and biotic...  相似文献   
304.
Starch/Poly(vinylalcohol) blends in two different ratios (60:40 and 50:50) were prepared with glycerol as a plasticizer. Films were cast by a solution casting method. One set of films were filled with 10 wt% of unmodified bentonite clay and another set of films were crosslinked with epichlorohydrin in an alkaline medium. The prepared film samples were subjected to X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), mechanical characterization and scanning electron microscope (SEM). Significant changes in the tensile properties were observed depending on the different chemical constituents of the films. The presence of clay and crosslinking with epichlorohydrin were both found to have considerable effect on the morphology and mechanical property of the films. The SEM investigations, XRD analysis and FTIR studies revealed the interaction between the various chemical components of the films.  相似文献   
305.
The chemical, physical and biological characteristics of water with respect to its suitability describe its quality. Concentration of pesticides or fertilisers degrades the water quality and affects marine life. A comprehensive environmental data information system helps to perform and complete common tasks in less time with less effort for data verification, data calculations, graph generation, and proper monitoring, which helps in the further mitigation step. In this paper, focus is given to a web-based system developed to express the quality of water in the imprecise environment of monitoring data. Water samples were analyzed for eight different surface water parameters, in which four parameters such as pH, dissolved oxygen, biochemical oxygen demand, and fecal coliform were used for the water quality index calculation following MPCB Water Quality Standards of class A-II for best designated use. The analysis showed that river points in a particular year were in very bad category with certainty level of 0–38 % which is unsuitable for drinking purposes; samples in bad category had certainty level that ranged from 38 to 50 %; samples in medium to good category had certainty levels from 50 to 100 %, and the remaining samples were in good to excellent category, suitable for drinking purposes, with certainty levels from 63 to 100 %.  相似文献   
306.
Environmental Science and Pollution Research - The rapid pace of economic development has resulted in the release of several polycyclic aromatic hydrocarbons (PAHs) into the environment. Microbial...  相似文献   
307.
Environmental Science and Pollution Research - Multi-drug resistance (MDR) in bacteria is regarded as an emerging pollutant in different food production avenues including aquaculture. One hundred...  相似文献   
308.
Environment, Development and Sustainability - Purulia is a hard rock terrain where water scarcity as well as water quality degradation has been a major threat for the past few decades. The prolong...  相似文献   
309.
Environmental Chemistry Letters - Climate change is impacting agriculture through a rise in greenhouse gases, higher temperatures and extreme precipitation patterns, with adverse consequences such...  相似文献   
310.
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