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   3687篇
  免费   28篇
  国内免费   17篇
安全科学   83篇
废物处理   233篇
环保管理   284篇
综合类   447篇
基础理论   797篇
环境理论   3篇
污染及防治   1251篇
评价与监测   358篇
社会与环境   266篇
灾害及防治   10篇
  2023年   33篇
  2022年   99篇
  2021年   91篇
  2020年   46篇
  2019年   68篇
  2018年   123篇
  2017年   114篇
  2016年   174篇
  2015年   110篇
  2014年   184篇
  2013年   346篇
  2012年   212篇
  2011年   282篇
  2010年   173篇
  2009年   159篇
  2008年   213篇
  2007年   220篇
  2006年   161篇
  2005年   150篇
  2004年   107篇
  2003年   91篇
  2002年   93篇
  2001年   81篇
  2000年   52篇
  1999年   33篇
  1998年   20篇
  1997年   18篇
  1996年   9篇
  1995年   26篇
  1994年   21篇
  1993年   13篇
  1992年   16篇
  1991年   13篇
  1990年   14篇
  1989年   8篇
  1988年   11篇
  1987年   5篇
  1983年   4篇
  1967年   5篇
  1966年   4篇
  1965年   4篇
  1964年   11篇
  1963年   9篇
  1962年   11篇
  1960年   8篇
  1958年   13篇
  1957年   5篇
  1956年   5篇
  1943年   3篇
  1940年   3篇
排序方式: 共有3732条查询结果,搜索用时 46 毫秒
71.
Environmental Science and Pollution Research - Persistent organic pollutants (POPs) are still globally distributed and can exert different effects on ecosystems. Little is known about the...  相似文献   
72.
Environmental Science and Pollution Research - Environmental arsenic exposure in adults and children has been associated with a reduction in the expression of club cell secretory protein (CC16) and...  相似文献   
73.

This article shows oily sawdust gasification research on countercurrent installation. Experimental research was on a laboratory scale. The main purpose of the experiment was combustible gas production with higher CH4 concentration. Gas concentrations like CO, CO2, CH4, H2, and CnHm determine syngas composition. The technological parameter’s value defines experimental conditions. Value of this was fuel to air ratio. With fuel to air ratio change, syngas composition was a differential phenomenon where it depended on the process parameters like temperature. Additionally, evaluation of methane formation from CO, H2, and CO2 was done. Methanization coefficients were based on CO and CO2 hydrogenation reactions. Component’s activity was in analogs way to syngas components changed.

  相似文献   
74.
Environmental Science and Pollution Research - A linear algebra theorem like Cramer’s rule was used for the analysis of a system of equations obtained from UV spectroscopy, and results were...  相似文献   
75.
Environmental Science and Pollution Research - A theoretical physicochemical and thermodynamic investigation of the adsorption of heavy metals Zn2+, Cd2+, Ni2+, and Cu2+on carbon-based adsorbents...  相似文献   
76.
Environmental Science and Pollution Research - Bisphenol A (BPA), one of the endocrine disrupting chemicals, is the object of great concern because of its widespread use throughout the world. In...  相似文献   
77.
Environmental Science and Pollution Research - A complete survey is presented on the inorganic composition of the euhalophyte annual succulent species Salicornia patula (Chenopodiaceae), including...  相似文献   
78.
Environmental Science and Pollution Research - Phytoremediation techniques have been proposed as ecological methods to clean up contaminated sites. This study is aimed to evaluate the effect of the...  相似文献   
79.
Environmental Science and Pollution Research - Chlorine (Cl) in the terrestrial environment is of interest from multiple perspectives, including the use of chloride as a tracer for water flow and...  相似文献   
80.
How do distinct visual stimuli help bumblebees discover flowers before they have experienced any reward outside of their nest? Two visual floral properties, type of a pattern (concentric vs radial) and its position on unrewarding artificial flowers (central vs peripheral on corolla), were manipulated in two experiments. Both visual properties showed significant effects on floral choice. When pitted against each other, pattern was more important than position. Experiment 1 shows a significant effect of concentric pattern position, and experiment 2 shows a significant preference towards radial patterns regardless of their position. These results show that the presence of markings at the center of a flower are not so important as the presence of markings that will direct bees there.  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