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   5834篇
  免费   50篇
  国内免费   26篇
安全科学   123篇
废物处理   278篇
环保管理   409篇
综合类   986篇
基础理论   1419篇
环境理论   6篇
污染及防治   1887篇
评价与监测   450篇
社会与环境   330篇
灾害及防治   22篇
  2023年   65篇
  2022年   154篇
  2021年   165篇
  2020年   79篇
  2019年   90篇
  2018年   203篇
  2017年   233篇
  2016年   296篇
  2015年   195篇
  2014年   307篇
  2013年   450篇
  2012年   322篇
  2011年   389篇
  2010年   255篇
  2009年   219篇
  2008年   356篇
  2007年   323篇
  2006年   264篇
  2005年   213篇
  2004年   193篇
  2003年   160篇
  2002年   136篇
  2001年   89篇
  2000年   46篇
  1999年   52篇
  1998年   28篇
  1997年   24篇
  1996年   25篇
  1995年   35篇
  1994年   33篇
  1993年   13篇
  1992年   22篇
  1991年   22篇
  1990年   22篇
  1989年   19篇
  1988年   18篇
  1987年   12篇
  1986年   26篇
  1985年   13篇
  1984年   13篇
  1983年   15篇
  1982年   20篇
  1980年   13篇
  1966年   18篇
  1965年   13篇
  1964年   12篇
  1961年   11篇
  1960年   12篇
  1957年   14篇
  1956年   11篇
排序方式: 共有5910条查询结果,搜索用时 15 毫秒
121.
Environmental Science and Pollution Research - Waste-to-energy approaches are becoming increasingly important around the world, and municipal solid waste (MSW) as a renewable and sustainable energy...  相似文献   
122.
Environmental Science and Pollution Research - We studied the removal of 61 emerging micropollutants, including illicit drugs, in a biofilter wastewater treatment plant located in the French Indies...  相似文献   
123.
Environmental Science and Pollution Research - Air and water quality in urban centers are summited to pollution from different sources, such as industrial activities, traffic, and wastewater...  相似文献   
124.
Environmental Science and Pollution Research - The impact of uncontrolled municipal dumping sites on metal contamination in the surrounding waters, sediments, and soils are of great concern in many...  相似文献   
125.
Environmental Science and Pollution Research - For a long time, limestone has been massively used in stone building and monuments because of its easy extraction and common presence in the...  相似文献   
126.
Environmental Science and Pollution Research - Water contamination is a common problem, especially considering dyes and drugs disposal. A possible and effective treatment method to remove these...  相似文献   
127.
Environmental Science and Pollution Research - Residential settings are of utmost importance for human exposure, as it is where people spend most of their time. Residential wood combustion is a...  相似文献   
128.
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   
129.
Forests play a fundamental role in the global carbon cycle and can be managed to mitigate greenhouse gas emissions and conserve or sequester carbon. Global policy and environmental changes can affect regional consumption of forest products, as well as inter-regional trade of forest goods and services. This study analyzes global and regional change impacts on the production, consumption and trade of forest products in two Nordic countries, Finland and Sweden. Annual data on removal and trade (1964–2012) for roundwood and sawnwood is used to identify structural breaks based on Chow tests. According to the analysis, the time period is divided into two periods: t1 (1964–1980) and t2 (1981–2012). In the first period, breaks occurred in 1975 and 1976 in the Finnish model and no break is found in the Swedish model. In the second period, we identify breaks in 1991 and 1992 for the Finnish model and in 2004, 2005 and 2006 for the Swedish model. Although our findings have broad empirical support, we do not identify any specific incident as a direct cause of the changes in the consumption and trade patterns of the two types of wood in these countries. The models and analysis presented here can serve as methodological tools for policymakers to better understand the effects of structural changes in the production of forest goods and services in the Nordic region and globally.  相似文献   
130.
Heat and free chlorine are among the most efficient and commonly used treatments to inactivate enteric viruses, but their global inactivation mechanisms have not been elucidated yet. These treatments have been shown to affect at least the capsid proteins of viruses and thus may affect the surface properties (i.e. electrostatic charge and hydrophobicity) of such particles. Our aim was to study the effects of heat and free chlorine on surface properties for a murine norovirus chosen as surrogate for human norovirus. No changes in the surface properties were observed with our methods for murine norovirus exposed to free chlorine. Only the heat treatment led to major changes in the surface properties of the virus with the expression of hydrophobic domains at the surface of the particles after exposure to a temperature of 55 °C. No modification of the expression of hydrophobic domains occurred after exposure to 60 °C, and the low hydrophobic state exhibited by infectious and inactivated particles after exposure to 60 °C appeared to be irreversible for inactivated particles only, which may provide a means to discriminate infectious from inactivated murine noroviruses. When exposed to a temperature of 72 °C or to free chlorine at a concentration of 50 mg/L, the genome became available for RNases.  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