全文获取类型
收费全文 | 3186篇 |
免费 | 26篇 |
国内免费 | 38篇 |
专业分类
安全科学 | 84篇 |
废物处理 | 174篇 |
环保管理 | 311篇 |
综合类 | 526篇 |
基础理论 | 660篇 |
环境理论 | 3篇 |
污染及防治 | 961篇 |
评价与监测 | 297篇 |
社会与环境 | 212篇 |
灾害及防治 | 22篇 |
出版年
2023年 | 40篇 |
2022年 | 120篇 |
2021年 | 136篇 |
2020年 | 69篇 |
2019年 | 59篇 |
2018年 | 123篇 |
2017年 | 121篇 |
2016年 | 149篇 |
2015年 | 93篇 |
2014年 | 150篇 |
2013年 | 210篇 |
2012年 | 152篇 |
2011年 | 189篇 |
2010年 | 141篇 |
2009年 | 129篇 |
2008年 | 136篇 |
2007年 | 129篇 |
2006年 | 84篇 |
2005年 | 132篇 |
2004年 | 166篇 |
2003年 | 154篇 |
2002年 | 107篇 |
2001年 | 85篇 |
2000年 | 36篇 |
1999年 | 35篇 |
1998年 | 16篇 |
1997年 | 26篇 |
1996年 | 19篇 |
1995年 | 23篇 |
1994年 | 19篇 |
1993年 | 9篇 |
1992年 | 11篇 |
1991年 | 16篇 |
1990年 | 9篇 |
1989年 | 12篇 |
1988年 | 5篇 |
1987年 | 10篇 |
1986年 | 8篇 |
1985年 | 11篇 |
1984年 | 10篇 |
1983年 | 11篇 |
1982年 | 6篇 |
1981年 | 8篇 |
1979年 | 9篇 |
1978年 | 4篇 |
1970年 | 3篇 |
1969年 | 3篇 |
1966年 | 3篇 |
1964年 | 4篇 |
1961年 | 3篇 |
排序方式: 共有3250条查询结果,搜索用时 0 毫秒
891.
892.
Ronaldo Sousa Tadeusz Zając Dariusz Halabowski Olga V. Aksenova Yulia V. Bespalaya Francisco Carvalho Paulo Castro Karel Douda Janine P. da Silva Noé Ferreira-Rodríguez Juergen Geist Clemens Gumpinger Anna M. Labecka Jasna Lajtner Iga Lewin Manuel Lopes-Lima Alexandra Meira Keiko Nakamura Joana Garrido Nogueira Paz Ondina Małgorzata Ożgo Joaquim Reis Nicoletta Riccardi Spase Shumka Mikhail O. Son Amílcar Teixeira Frankie Thielen Maria Urbańska Simone Varandas Niklas Wengström Katarzyna Zając Alexandra Zieritz David C. Aldridge 《Conservation biology》2023,37(2):e13994
Europe has a long history of human pressure on freshwater ecosystems. As pressure continues to grow and new threats emerge, there is an urgent need for conservation of freshwater biodiversity and its ecosystem services. However, whilst some taxonomic groups, mainly vertebrates, have received a disproportionate amount of attention and funds, other groups remain largely off the public and scientific radar. Freshwater mussels (Bivalvia, Unionida) are an alarming example of this conservation bias and here we point out six conceptual areas that need immediate and long-term attention: knowledge, threats, socioeconomics, conservation, governance and education. The proposed roadmap aims to advance research, policy and education by identifying the most pressing priorities for the short- and long-term conservation of freshwater mussels across Europe. 相似文献
893.
Pierfrancesco Biasetti Thomas B. Hildebrandt Frank Göritz Robert Hermes Susanne Holtze Jan Stejskal Cesare Galli Ilaria Pollastri Alessia Muzzo Isaac Lekolool David Ndereeh Patrick Omondi Linus Kariuki Domnic Mijele Samuel Mutisya Stephen Ngulu Barbara de Mori 《Conservation biology》2023,37(2):e14029
Achieving ethically responsible decisions is crucial for the success of biodiversity conservation projects. We adapted the ethical matrix, decision tree, and Bateson's cube to assist in the ethical analysis of complex conservation scenarios by structuring these tools so that they can implement the different value dimensions (environmental, social, and animal welfare) involved in conservation ethics. We then applied them to a case study relative to the decision-making process regarding whether or not to continue collecting biomaterial on the oldest of the two remaining northern white rhinoceroses (Ceratotherium simum cottoni), a functionally extinct subspecies of the white rhinoceros. We used the ethical matrix to gather ethical pros and cons and as a starting point for a participatory approach to ethical decision-making. We used decision trees to compare the different options at stake on the basis of a set of ethical desiderata. We used Bateson's cube to establish a threshold of ethical acceptability and model the results of a simple survey. The application of these tools proved to be pivotal in structuring the decision-making process and in helping reach a shared, reasoned, and transparent decision on the best option from an ethical point of view among those available. 相似文献
894.
Influence of aeration rate and biodegradability fractionation on composting kinetics 总被引:3,自引:0,他引:3
The influences of aeration rate and biodegradability fractionation on biodegradation kinetics during composting were studied. The first step was the design of a suitable lab-reactor that enabled the simulation of composting. The second step comprised of composting trials of six blends of sludge (originating from a food processing effluent) with wood chips using aeration rates of 1.69, 3.62, 3.25, 8.48, 11.98 and 16.63 L/h/kg DM of mixture. Biodegradation was evaluated by respiration measurements and from the analysis of the substrate (dry matter, organic matter, total carbon and chemical oxygen demand removal). Continuous measurement of oxygen consumption was coupled with the analysis of initial substrate and composted product for chemical oxygen demand (in the soluble and non-soluble fractions), which enabled an evaluation of the organic matter biodegradability. Oxygen requirements to remove both the easily and slowly biodegradable fractions were determined. Dividing the substrate into different parts according to biodegradability allowed explanation of the influence of aeration rate on stabilization kinetics. Considering that the biodegradation kinetics were of the first-order, the kinetic constants of the easily and slowly biodegradable fractions were calculated as a function of temperature. The methodology presented here allows the comparison of organic wastes in terms of their content of easily and slowly biodegradable fractions and the respective biodegradation kinetics. 相似文献
895.
Magdaleno A Mendelson A de Iorio AF Rendina A Moretton J 《Waste management (New York, N.Y.)》2008,28(11):2134-2139
The Matanza-Riachuelo is one of the most polluted rivers of Latin America. The complex chemical mixture of pollutants discharged into the river is accumulated in the river sediments. In this paper, Matanza-Riachuelo river sediment composition and genotoxicity were tested in order to develop a cost-effective, environmentally sound option for disposal and management of contaminated dredged materials. Sampling was performed in a rural area, in a solid waste dumpsite and also in an urban and industrial area. The concentrations of total heavy metals increased from the upper basin to the lower basin. The Ames Salmonella typhimurium test and the Saccharomyces cerevisiae D7 test were performed using toxicity characteristic leachate procedure (TCLP) leachates. The concentrations of copper, lead, and chromium in the leachates exceeded the guide levels for the protection of aquatic life. Low concentrations of organic chlorinated compounds were detected in the leachates. Genotoxic profiles were obtained by testing TCLP leachates from polluted sediment samples with Salmonella typhimurium, Saccharomyces cerevisiae D7, and water sediment suspension with Allium cepa test. No mutagenicity effects on Ames test were observed. Gene conversion and mitotic reversion in Saccharomyces cerevisiae D7 and chromosome aberration in Allium cepa were induced by the sediment samples. Results obtained suggest that dredged sediments could be classified as genotoxic hazardous waste. 相似文献
896.
María Teresa García Ignacio Gracia Gema Duque Antonio de Lucas Juan Francisco Rodríguez 《Waste management (New York, N.Y.)》2009,29(6):1814-1818
Dissolution with suitable solvents is one of the cheapest and more efficient processes for polystyrene waste management. In this work the solubility of polystyrene foams in several solvents benzene, toluene, xylene, tetrahydrofuran, chloroform, 1,3-butanediol, 2-butanol, linalool, geraniol, d-limonene, p-cymene, terpinene, phellandrene, terpineol, menthol, eucalyptol, cinnamaldheyde, nitrobenzene, N,N-dimethylformamide and water has been determined.Experimental results have shown that to develop a “green process” the constituents of essential oils, d-limonene, p-cymene, terpinene, phellandrene, are the most appropriate solvents. The action of these solvent does not produce any degradation of polymer chains. The solubility of the polymer in the mentioned solvents at different temperatures has been investigated. The solvent can be easily recycled by distillation. 相似文献
897.
Real-time monitoring data for real-time multi-model validation: coupling ENSEMBLE and EURDEP 总被引:1,自引:0,他引:1
Galmarini S Bianconi R de Vries G Bellasio R 《Journal of environmental radioactivity》2008,99(8):1233-1241
The ENSEMBLE system has been considerably expanded and improved. The system that allows the real-time collection of atmospheric dispersion forecasts their real-time consultation and ensemble dispersion analysis has been coupled with the EUropean Radiological Data Exchange Platform (EURDEP) for the acquisition of real-time monitoring data on environmental (mainly in air) radiological measurements. This paper explains how the coupling has been realized and presents the potentials of this unique system that is presently in use in more than 25 countries around the world. 相似文献
898.
899.
Ernst Mayr: the doyen of twentieth century evolutionary biology 总被引:1,自引:0,他引:1
Hölldobler B 《Die Naturwissenschaften》2004,91(6):249-254