全文获取类型
收费全文 | 17239篇 |
免费 | 196篇 |
国内免费 | 143篇 |
专业分类
安全科学 | 517篇 |
废物处理 | 661篇 |
环保管理 | 2513篇 |
综合类 | 2642篇 |
基础理论 | 4718篇 |
环境理论 | 7篇 |
污染及防治 | 4450篇 |
评价与监测 | 1076篇 |
社会与环境 | 887篇 |
灾害及防治 | 107篇 |
出版年
2022年 | 123篇 |
2021年 | 141篇 |
2020年 | 119篇 |
2019年 | 159篇 |
2018年 | 246篇 |
2017年 | 250篇 |
2016年 | 387篇 |
2015年 | 261篇 |
2014年 | 388篇 |
2013年 | 1322篇 |
2012年 | 491篇 |
2011年 | 692篇 |
2010年 | 581篇 |
2009年 | 555篇 |
2008年 | 735篇 |
2007年 | 744篇 |
2006年 | 710篇 |
2005年 | 538篇 |
2004年 | 624篇 |
2003年 | 560篇 |
2002年 | 514篇 |
2001年 | 722篇 |
2000年 | 481篇 |
1999年 | 300篇 |
1998年 | 257篇 |
1997年 | 229篇 |
1996年 | 240篇 |
1995年 | 268篇 |
1994年 | 284篇 |
1993年 | 226篇 |
1992年 | 253篇 |
1991年 | 229篇 |
1990年 | 257篇 |
1989年 | 244篇 |
1988年 | 198篇 |
1987年 | 178篇 |
1986年 | 160篇 |
1985年 | 171篇 |
1984年 | 196篇 |
1983年 | 185篇 |
1982年 | 191篇 |
1981年 | 183篇 |
1980年 | 137篇 |
1979年 | 157篇 |
1978年 | 135篇 |
1977年 | 120篇 |
1975年 | 119篇 |
1974年 | 117篇 |
1973年 | 110篇 |
1972年 | 133篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
31.
D Heinevetter H J Lewerenz R Plass R Macholz 《Journal of environmental science and health. Part. B》1985,20(5):539-558
In vitro investigations of the influence of lindane and its metabolites were performed on microsomal and mitochondrial ATPases from liver, kidney and brain of rat and mouse. The microsomal Na+-K+-ATPases in rat liver were inhibited by the tested substances. An increase of activity was observed only with 2.5 X 10(-5) M gamma-HCH. Effects on the microsomal Na+-K+-ATPase from kidney and brain of rat were also indicated. The mitochondrial enzyme in rat liver was stimulated by all the compounds tested at concentrations of 10(-4) M - 10(-2) M. The effects on mitochondrial enzymes from kidney and brain varied in dependence on the tested substances. In the microsomes and mitochondria of mouse an influence on the Na+-K+-ATPases similar to the effects on the preparations from organs of rat was evident. 相似文献
32.
Smith PN Cobb GP Godard-Codding C Hoff D McMurry ST Rainwater TR Reynolds KD 《Environmental pollution (Barking, Essex : 1987)》2007,150(1):41-64
Here we review mechanisms and factors influencing contaminant exposure among terrestrial vertebrate wildlife. There exists a complex mixture of biotic and abiotic factors that dictate potential for contaminant exposure among terrestrial and semi-terrestrial vertebrates. Chemical fate and transport in the environment determine contaminant bioaccessibility. Species-specific natural history characteristics and behavioral traits then play significant roles in the likelihood that exposure pathways, from source to receptor, are complete. Detailed knowledge of natural history traits of receptors considered in conjunction with the knowledge of contaminant behavior and distribution on a site are critical when assessing and quantifying exposure. We review limitations in our understanding of elements of exposure and the unique aspects of exposure associated with terrestrial and semi-terrestrial taxa. We provide insight on taxa-specific traits that contribute, or limit exposure to, transport phenomenon that influence exposure throughout terrestrial systems, novel contaminants, bioavailability, exposure data analysis, and uncertainty associated with exposure in wildlife risk assessments. Lastly, we identify areas related to exposure among terrestrial and semi-terrestrial organisms that warrant additional research. 相似文献
33.
34.
To comply with EU recycling targets for packaging waste, the UK relies on an industry run and market based eco-tax levied by reprocessors on obligated businesses. After examining the details of this approach, the use of Packaging Waste Recovery Notes is assessed in terms of its allocative impact and the contribution made to eco-efficiency. The evidence indicates the UK system has minimized the cost of delivering current EU targets, but has not been able to deliver allocative efficiency or to demonstrate dynamic improvements in resource use. Its effectiveness in meeting impending higher targets remains open to question. 相似文献
35.
36.
V. Nataf M. V. Senat M. Albert L. Bidat P. de Mazancourt J. Roume L. Allard D. Le Tessier Y. Ville J. Selva 《黑龙江环境通报》2002,22(8):675-680
Male phenotype associated with a 45,X karyotype is an infrequent finding. We present a case diagnosed prenatally on amniocentesis performed for maternal age. The male phenotype was associated with a translocation of a distal part of Yp including the pseudoautosomal SHOX gene and SRY gene on the short arm of a chromosome 21. By DNA analysis we could show that the X chromosome was of maternal origin and that the breakpoint was in interval 3 of the Y chromosome. Mechanisms and genetic counselling are discussed based on a review of published cases of 45,X and XX males. Copyright © 2002 John Wiley & Sons, Ltd. 相似文献
37.
38.
39.
40.
G. D. Kataev 《Russian Journal of Ecology》2005,36(6):421-426
The effect of industrial air pollution on natural small mammal populations has been studied in the northern taiga subzone of the boreal forest zone. The results of long-term monitoring have been used to demonstrate the possibility of predicting changes in the main population and community characteristics of the animal species studied as dependent on the degree of anthropogenic impact. 相似文献