全文获取类型
收费全文 | 3776篇 |
免费 | 85篇 |
国内免费 | 37篇 |
专业分类
安全科学 | 183篇 |
废物处理 | 138篇 |
环保管理 | 942篇 |
综合类 | 364篇 |
基础理论 | 945篇 |
环境理论 | 3篇 |
污染及防治 | 914篇 |
评价与监测 | 237篇 |
社会与环境 | 148篇 |
灾害及防治 | 24篇 |
出版年
2023年 | 43篇 |
2022年 | 53篇 |
2021年 | 42篇 |
2020年 | 44篇 |
2019年 | 65篇 |
2018年 | 77篇 |
2017年 | 87篇 |
2016年 | 132篇 |
2015年 | 83篇 |
2014年 | 107篇 |
2013年 | 376篇 |
2012年 | 139篇 |
2011年 | 238篇 |
2010年 | 173篇 |
2009年 | 175篇 |
2008年 | 185篇 |
2007年 | 201篇 |
2006年 | 183篇 |
2005年 | 109篇 |
2004年 | 138篇 |
2003年 | 135篇 |
2002年 | 122篇 |
2001年 | 75篇 |
2000年 | 48篇 |
1999年 | 47篇 |
1998年 | 50篇 |
1997年 | 52篇 |
1996年 | 59篇 |
1995年 | 58篇 |
1994年 | 48篇 |
1993年 | 45篇 |
1992年 | 29篇 |
1991年 | 31篇 |
1990年 | 40篇 |
1989年 | 25篇 |
1988年 | 38篇 |
1987年 | 28篇 |
1986年 | 41篇 |
1985年 | 23篇 |
1984年 | 38篇 |
1983年 | 32篇 |
1982年 | 34篇 |
1981年 | 32篇 |
1980年 | 21篇 |
1979年 | 20篇 |
1978年 | 12篇 |
1977年 | 10篇 |
1976年 | 10篇 |
1974年 | 8篇 |
1972年 | 9篇 |
排序方式: 共有3898条查询结果,搜索用时 250 毫秒
951.
Zhu Yunqing Wang Tian Wang Wenjuan Chen Siyu Lichtfouse Eric Cheng Cheng Zhao Jie Li Yingxuan Wang Chuanyi 《Environmental Chemistry Letters》2019,17(1):481-486
Environmental Chemistry Letters - Contamination of waters by pharmaceuticals is a major health issue. Therefore, there is a need for efficient techniques to remove pharmaceutical pollutants. Here,... 相似文献
952.
Verkerk Pieter J. Lindner Marcus Pérez-Soba Marta Paterson James S. Helming John Verburg Peter H. Kuemmerle Tobias Lotze-Campen Hermann Moiseyev Alexander Müller Daniel Popp Alexander Schulp Catharina J. E. Stürck Julia Tabeau Andrzej Wolfslehner Bernhard van der Zanden Emma H. 《Regional Environmental Change》2018,18(3):817-830
Regional Environmental Change - Plausible scenarios of future land use derived from model projections may differ substantially from what is actually desired by society, and identifying such... 相似文献
953.
Mao Xinyou Wang Lan Gu Shiqing Duan Yanyan Zhu Yunqing Wang Chuanyi Lichtfouse Eric 《Environmental Chemistry Letters》2018,16(2):653-658
Environmental Chemistry Letters - Water pollution caused by heavy metals has dramatically impacted ecosystems in recent years. For instance, 45.4% of lakes in China are in the category of moderate... 相似文献
954.
Castro-Castellon Ana Teresa Hughes Jocelyne Mary Rose Read Daniel Steven Azimi Yaldah Chipps Michael James Hankins Nicholas Peter 《Environmental science and pollution research international》2021,28(22):27731-27741
Environmental Science and Pollution Research - A continuous flow filtration system was designed to identify and quantify the removal mechanisms of Cyanobacteria (Microcystis aeruginosa) by... 相似文献
955.
Tropical forests are experiencing enormous threats from deforestation and habitat degradation. Much knowledge of the impacts of these land-use changes on tropical species comes from studies examining patterns of richness and abundance. Demographic vital rates (survival, reproduction, and movement) can also be affected by land-use change in a way that increases species vulnerability to extirpation, but in many cases these impacts may not be manifested in short-term changes in abundance or species richness. We conducted a literature review to assess current knowledge and research effort concerning how land-use change affects species vital rates in tropical forest vertebrates. We found a general paucity of empirical research on demography across taxa and regions, with some biases toward mammals and birds and land-use transitions, including fragmentation and agriculture. There is also considerable between-species variation in demographic responses to land-use change, which could reflect trait-based differences in species sensitivity, complex context dependencies (e.g., between-region variation), or inconsistency in methods used in studies. Efforts to improve understanding of anthropogenic impacts on species demography are underway, but there is a need for increased research effort to fill knowledge gaps in understudied tropical regions and taxa. The lack of information on demographic impacts of anthropogenic disturbance makes it difficult to draw definite conclusions about the magnitude of threats to tropical ecosystems under anthropogenic pressures. Thus, determining conservation priorities and improving conservation effectiveness remains a challenge. 相似文献
956.
Wayne Chudyk Christine Sotolongo Eric Mueller 《Environmental monitoring and assessment》2014,186(1):415-420
A phenosafranine-containing Nafion film attached to the distal end of a fiber-optic probe forms a functional redox-sensitive optical sensor. The synthetic cationic photoactive dye phenosafranine, 3,7-diamino-5-phenylphenazinium chloride, responds with changes in light absorbance between its oxidized and reduced forms. This optical property persists when phenosafranine is sorbed into Nafion, a perfluorosulfonate anionic film. Optical properties of the sensor are similar to those seen by others in solution. At high redox conditions, such as an open nitrogen-purged aqueous pH 6.5 solution, optical absorbance of phenosafranine is high, while at low redox conditions, such as an aqueous pH 6.5 iron(II) solution, optical absorbance of phenosafranine is low. Titration of a closed pH 6.5 aqueous solution with a standard iron(II) solution lowers redox potential in a predictable manner and can be followed by the optical redox sensor in parallel with a commercial redox potential electrode. 相似文献
957.
Anne-Laure Lereboullet Gérard Beltrando Douglas K. Bardsley Eric Rouvellac 《Regional Environmental Change》2014,14(5):1951-1966
Mediterranean viticulture could suffer from hotter and drier growing seasons over the coming decades. The present article focuses on the wine-producing area Côtes-du-Roussillon-Villages near Perpignan, in southern France. We used observational daily data (1925–2010) from Perpignan weather station and daily outputs (2001–2060) of the regional climate model ARPEGE-RETIC-V4 from Météo-France with scenarios A2, A1B and B1, to assess the exposure of the regional wine system to changes in temperature and precipitation, both in the recent past and the coming decades (1925–2060). Temperatures during the growing season and summer temperature extremes have been increasing continuously since the mid-1980s and are projected to increase faster from the mid-2040s. Precipitation is highly variable and very low in summer, and projections suggest greater uncertainty, and more extreme drought events could be expected. The analysis of climate data was complemented by thirty-two in-depth interviews with local actors of the wine industry to assess the impacts of climate change on their activities and potential adaptive options. Producers reported negative impacts of recent changes in climate in conjunction with a difficult economic situation. Analyses of historical, social and economic backgrounds are important to fully conceptualize the nature and extent of climate change risks in the region. This case study provides important insights into the roles of non-climatic factors in the generation of vulnerability for Mediterranean agricultural systems facing rapid climate change. 相似文献
958.
Crini Grégorio Lichtfouse Eric Wilson Lee D. Morin-Crini Nadia 《Environmental Chemistry Letters》2019,17(1):195-213
Environmental Chemistry Letters - The removal of contaminants from wastewaters is a major challenge in the field of water pollution. Among numerous techniques available for contaminant removal,... 相似文献
959.
Environmental Chemistry Letters - The rising atmospheric CO2 level is partly responsible for global warming. Despite numerous warnings from scientists during the past years, nations are reacting... 相似文献
960.
Duan Biggs Rosie Cooney Dilys Roe Holly T. Dublin James R. Allan Dan W.S. Challender Diane Skinner 《Conservation biology》2017,31(1):5-12
The escalating illegal wildlife trade (IWT) is one of the most high‐profile conservation challenges today. The crisis has attracted over US$350 million in donor and government funding in recent years, primarily directed at increased enforcement. There is growing recognition among practitioners and policy makers of the need to engage rural communities that neighbor or live with wildlife as key partners in tackling IWT. However, a framework to guide such community engagement is lacking. We developed a theory of change (ToC) to guide policy makers, donors, and practitioners in partnering with communities to combat IWT. We identified 4 pathways for community‐level actions: strengthen disincentives for illegal behavior, increase incentives for wildlife stewardship, decrease costs of living with wildlife, and support livelihoods that are not related to wildlife. To succeed the pathways, all require strengthening of enabling conditions, including capacity building, and of governance. Our ToC serves to guide actions to tackle IWT and to inform the evaluation of policies. Moreover, it can be used to foster dialogue among IWT stakeholders, from local communities to governments and international donors, to develop a more effective, holistic, and sustainable community‐based response to the IWT crisis. 相似文献