全文获取类型
收费全文 | 1930篇 |
免费 | 21篇 |
国内免费 | 25篇 |
专业分类
安全科学 | 50篇 |
废物处理 | 73篇 |
环保管理 | 268篇 |
综合类 | 430篇 |
基础理论 | 365篇 |
环境理论 | 2篇 |
污染及防治 | 553篇 |
评价与监测 | 107篇 |
社会与环境 | 113篇 |
灾害及防治 | 15篇 |
出版年
2023年 | 19篇 |
2022年 | 20篇 |
2021年 | 34篇 |
2020年 | 23篇 |
2019年 | 29篇 |
2018年 | 54篇 |
2017年 | 53篇 |
2016年 | 63篇 |
2015年 | 77篇 |
2014年 | 82篇 |
2013年 | 97篇 |
2012年 | 81篇 |
2011年 | 127篇 |
2010年 | 104篇 |
2009年 | 103篇 |
2008年 | 98篇 |
2007年 | 109篇 |
2006年 | 89篇 |
2005年 | 61篇 |
2004年 | 82篇 |
2003年 | 50篇 |
2002年 | 66篇 |
2001年 | 72篇 |
2000年 | 31篇 |
1999年 | 20篇 |
1998年 | 17篇 |
1997年 | 27篇 |
1996年 | 20篇 |
1995年 | 33篇 |
1994年 | 21篇 |
1993年 | 7篇 |
1992年 | 15篇 |
1991年 | 25篇 |
1990年 | 11篇 |
1989年 | 19篇 |
1988年 | 8篇 |
1987年 | 4篇 |
1985年 | 7篇 |
1984年 | 5篇 |
1982年 | 11篇 |
1981年 | 11篇 |
1979年 | 9篇 |
1970年 | 6篇 |
1969年 | 4篇 |
1966年 | 3篇 |
1965年 | 4篇 |
1962年 | 3篇 |
1960年 | 4篇 |
1959年 | 3篇 |
1954年 | 3篇 |
排序方式: 共有1976条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
6.
7.
8.
von Zweigbergk P Lindahl R Ostin A Ekman J Levin JO 《Journal of environmental monitoring : JEM》2002,4(5):663-666
A diffusive sampling method for determination of methyl isocyanate in air has been developed. A glass fibre filter impregnated with 1-(2-methoxyphenyl)piperazine in a commercially available diffusive sampling device was used to collect methyl isocyanate and the derivative formed was analysed with LC-MS/MS. The sampling rate was determined to be 15.6 ml min(-1), with a relative standard deviation of 7.3%. The sampler was validated for sampling periods from 15 min to 8 h, for relative humidities from 20% to 80% and for concentrations from I to 46 microg m(-3). A field validation was also made and the diffusive sampling results showed no difference compared to a pumped reference method. The impregnated filters have to be stored apart from the diffusive sampler housing and loaded into the sampler prior to each sampling. 相似文献
9.
Hofschreuder P van der Meulen W Heeres P Slanina S 《Journal of environmental monitoring : JEM》1999,1(2):143-147
Passive samplers provide an excellent opportunity to perform indicative measurements or establish a dense network of measuring sites. A drawback compared with conventional active measuring methods is the larger spread of results. This variation can, to a large extent, be attributed to the influence of temperature, sampler geometry and wind on sampling results. A proper design of sampler geometry and optimum choice of draught shield can reduce the influence of wind velocity on a badge type sampler to less than 10%. Wire mesh screens prove to be inadequate in damping turbulence. Filters give good results. Attention should be paid to the size and isolation value of the walls of the sampler to prevent thermal updrafts occurring within the sampler. Tube type samplers are less influenced by wind, provided that turbulence is prevented from influencing diffusion within the sampler. 相似文献
10.
Sarah Simpson Mary Mahoney Elizabeth Harris Rosemary Aldrich Jenny Stewart-Williams 《Environmental Impact Assessment Review》2005,25(7-8):772
In Australasia (Australia and New Zealand) the use of health impact assessment (HIA) as a tool for improved policy development is comparatively new. The public health workforce do not routinely assess the potential health and equity impacts of proposed policies or programs. The Australasian Collaboration for Health Equity Impact Assessment was funded to develop a strategic framework for equity-focused HIA (EFHIA) with the intent of strengthening the ways in which equity is addressed in each step of HIA. The collaboration developed a draft framework for EFHIA that mirrored, but modified the commonly accepted steps of HIA; tested the draft framework in six different health service delivery settings; analysed the feedback about application of the draft EFHIA framework and modified it accordingly. The strategic framework shows promise in providing a systematic process for identifying potential differential health impacts and assessing the extent to which these are avoidable and unfair. This paper presents the EFHIA framework and discusses some of the issues that arose in the case study sites undertaking equity-focused HIA. 相似文献