全文获取类型
收费全文 | 854篇 |
免费 | 38篇 |
国内免费 | 220篇 |
专业分类
安全科学 | 136篇 |
废物处理 | 36篇 |
环保管理 | 112篇 |
综合类 | 409篇 |
基础理论 | 80篇 |
污染及防治 | 241篇 |
评价与监测 | 41篇 |
社会与环境 | 45篇 |
灾害及防治 | 12篇 |
出版年
2024年 | 1篇 |
2023年 | 15篇 |
2022年 | 15篇 |
2021年 | 30篇 |
2020年 | 30篇 |
2019年 | 21篇 |
2018年 | 27篇 |
2017年 | 36篇 |
2016年 | 39篇 |
2015年 | 30篇 |
2014年 | 37篇 |
2013年 | 73篇 |
2012年 | 73篇 |
2011年 | 85篇 |
2010年 | 45篇 |
2009年 | 74篇 |
2008年 | 39篇 |
2007年 | 58篇 |
2006年 | 60篇 |
2005年 | 45篇 |
2004年 | 45篇 |
2003年 | 36篇 |
2002年 | 25篇 |
2001年 | 18篇 |
2000年 | 20篇 |
1999年 | 15篇 |
1998年 | 11篇 |
1997年 | 15篇 |
1996年 | 13篇 |
1995年 | 13篇 |
1994年 | 10篇 |
1993年 | 11篇 |
1992年 | 7篇 |
1991年 | 12篇 |
1990年 | 7篇 |
1989年 | 2篇 |
1988年 | 4篇 |
1987年 | 2篇 |
1985年 | 2篇 |
1984年 | 4篇 |
1983年 | 1篇 |
1981年 | 2篇 |
1980年 | 1篇 |
1977年 | 3篇 |
排序方式: 共有1112条查询结果,搜索用时 31 毫秒
121.
Major fluorinated chemical manufacturers have developed new short-chain per- and polyfluorinated substances with more favorable environmental, health and safety profiles. This study provides the first evaluation of the elimination half-life of perfluorohexanoic acid (PFHxA) from the blood of humans. PFHxA biomonitoring data were obtained from a recently published study of professional ski wax technicians. These data were analyzed to provide estimates of the apparent half-life of PFHxA from humans, and comparisons were made with kinetic studies of PFHxA elimination from mice, rats and monkeys. The apparent elimination half-life of PFHxA in highly exposed humans ranged between 14 and 49 d with a geomean of 32 d. The half-lives of PFHxA in mice, rats, monkeys and humans were proportional to body weight with no differences observed between genders, indicating similar volumes of distribution and similar elimination mechanisms among mammalian species. Compared to long-chain perfluoroalkyl acid analogs, PFHxA is rapidly cleared from biota. The consistent weight-normalized elimination half-lives for PFHxA in mammalian species indicates that results obtained from animal models are suitable for establishment of PFHxA benchmark dose and reference dose hazard endpoints for use in human risk assessments. 相似文献
122.
123.
125.
Hao Wang Xiangbin Ran Jingxi Li Jun Liu Wentao Wu Menglu Li Jiaye Zang 《环境科学学报(英文版)》2019,31(9):161-173
Based on the measurement of major and trace elements in suspended sediments in the low reaches of the Changjiang River during throughout a whole hydrologic year, the origins, seasonal variations, and fluxes of multielements and the human impacts on multielements transport processes have been analyzed along with the influence of weathering in the Changjiang River basin. The results show that most element contents were high in both autumn and winter and low in summer, which was largely caused by the dilution of discharge. Weathering detritus in the Changjiang River basin is the main source of most elements in suspended sediments. However, riverine pollution could bring more loadings of Cd, Pb, As and Zn into river water than it did a few decades ago. The annual average fluxes of Cd, Pb and Zn, which are major contamination elements, to the sea were 179 ± 21 tons/year, 7810 ± 675 tons/year, and 12,000 ± 1320 tons/year,respectively, in which approximately 8.7%, 11.9% and 2.7% of their loadings, respectively,were contributed by pollution inputs. Element exports mainly occurred in the summer(44.4%–57.4%) in the lower part of the Changjiang River. A general relationship between sediment retention and element content suggests a positive feedback mechanism for the decreased number of particles, in which element riverine loadings are reduced due to the enhanced trapping effect by the Three Gorges Dam(TGD). Compared to those in 1980,current element shares of the Changjiang River compared to the global budget have declined due to the construction of the TGD. 相似文献
126.
郭亚逢 《安全.健康和环境》2019,19(1):37-42
针对乙烯裂解装置污水会逸散出少量的VOCs气体,其苯系物及烯烃类物质含量高、恶臭明显、湿度大、浓度波动大,治理难度极大,所处环境为火灾爆炸危险区域且废气可能达到爆炸下限,安全控制措施要求高这一情况,建成了国内首套防爆型低温等离子体VOCs废气治理设施,在某石化公司防爆1区安全运行一年,实践证明:苯系物、烯烃、硫化物的去除效率可达98%以上,达到国标的各项要求,电气安全控制措施能够满足防爆1区。 相似文献
127.
128.
129.
Goonnapa Fucharoen Warunee Tungwiwat Thawalwong Ratanasiri Kanokwan Sanchaisuriya Supan Fucharoen 《黑龙江环境通报》2003,23(5):393-396
In order to provide a noninvasive prenatal diagnosis of the hemoglobin E (Hb E) related disorder, we have evaluated the possibility of identifying the fetal βE-globin gene in maternal plasma. The analysis was performed during 8 to 18 weeks of gestation using DNA extracted from 200 µL of plasma from pregnant women whose husbands carried Hb E. The βE-globin mutation in maternal plasma was detected by a nested PCR amplification followed by the Mnl I restriction analysis. The result was compared with that of routine analysis of the CVS specimens. Among the five pregnant women examined, the fetal βE-globin gene was identified in maternal plasma in three of them and the result was completely concordant with the conventional CVS analysis. This simple noninvasive prenatal detection of the fetal βE-globin gene should prove useful in a prevention and control program of Hb E/β-thalassemia in countries where the βE-globin gene is prevalent. Copyright © 2003 John Wiley & Sons, Ltd. 相似文献
130.
Ana Rosa Moreno 《Regional Environmental Change》2006,6(3):157-164
Many people would be increasingly affected by living under critical conditions in Latin America if, as expected, global warming aggravates disease and pest transmission processes. Heat waves and air pollution would increase heat-related diseases and illness episodes in large cities. Fire smoke has been associated with irritation of the throat, lung and eyes, and respiratory problems. Climate extreme increases associated with climate change would cause physical damage, population displacement, and adverse effects on food production, freshwater availability and quality. It would also increase the risks of infectious and vector-borne diseases. Climate change impacts the geographical range, seasonality, and the incidence rate of vector-borne diseases, such as malaria. Climate-related ecological changes may expand cholera transmission, particularly among populations in low-laying tropical coastal areas. El Niño conditions may affect the incidence of infectious diseases, such as malaria. Ocean warming would increase temperature-sensitive toxins produced by phytoplankton, which could cause more frequent contamination of seafood. A clearer understanding on the current role of climate change in disease patterns will be able to improve forecasts of potential future impacts of projected climate change and support action to reduce such impacts. 相似文献