全文获取类型
收费全文 | 1435篇 |
免费 | 17篇 |
国内免费 | 12篇 |
专业分类
安全科学 | 37篇 |
废物处理 | 88篇 |
环保管理 | 121篇 |
综合类 | 161篇 |
基础理论 | 298篇 |
环境理论 | 2篇 |
污染及防治 | 536篇 |
评价与监测 | 126篇 |
社会与环境 | 89篇 |
灾害及防治 | 6篇 |
出版年
2023年 | 13篇 |
2022年 | 50篇 |
2021年 | 36篇 |
2020年 | 18篇 |
2019年 | 23篇 |
2018年 | 47篇 |
2017年 | 52篇 |
2016年 | 77篇 |
2015年 | 50篇 |
2014年 | 83篇 |
2013年 | 112篇 |
2012年 | 85篇 |
2011年 | 136篇 |
2010年 | 79篇 |
2009年 | 65篇 |
2008年 | 86篇 |
2007年 | 123篇 |
2006年 | 70篇 |
2005年 | 53篇 |
2004年 | 42篇 |
2003年 | 34篇 |
2002年 | 42篇 |
2001年 | 18篇 |
2000年 | 12篇 |
1999年 | 11篇 |
1998年 | 5篇 |
1997年 | 5篇 |
1996年 | 8篇 |
1995年 | 8篇 |
1994年 | 7篇 |
1993年 | 5篇 |
1991年 | 2篇 |
1989年 | 3篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1967年 | 1篇 |
1964年 | 1篇 |
排序方式: 共有1464条查询结果,搜索用时 15 毫秒
71.
72.
73.
Giuseppe Vaccari Giulio Sgualdino Elena Tamburini Giorgio Pezzi Piercarlo Citterio Roberto Verardi Krzysztof Urbaniec 《Journal of Cleaner Production》2005,13(15):1447-1460
In the past years we evaluated different strategies with the aim of eliminating completely from the beet sugar factory, the traditional calco-carbonic purification process taking into account the well-known problems related to the utilization of lime and the production of carbonation sludge.To complete the picture of the possible solutions to be adopted for the elimination of the traditional purification process, we tested and evaluated in laboratory and in pilot plants a new eco-friendly proposal.The results obtained, as well as the proposed flow-sheet and some economic evaluations, are presented and discussed. 相似文献
74.
75.
76.
Adánez-Rubio Iñaki Pérez-Astray Antón Abad Alberto Gayán Pilar De Diego Luis F. Adánez Juan 《Mitigation and Adaptation Strategies for Global Change》2019,24(7):1293-1306
Mitigation and Adaptation Strategies for Global Change - Bioenergy with carbon dioxide (CO2) capture and storage (BECCS) technologies represent an interesting option to reach negative carbon... 相似文献
77.
C. Lobo M. Sanchez C. Garbi E. Ferrer M. J. Martinez-Iñigo J. L. Allende C. Martín L. Casasús R. Alonso-Sanz A. Gibello M. Martin 《Water, Air, & Soil Pollution: Focus》2003,3(3):35-46
Molecular techniques and modelling are presented as powerful tools required in the performance of efficient soil and water bioremediation systems. An Escherichia coli CC118-D strain was constructed by inserting the Klebsiella pneumoniae hpa B gene, coding for the unstable 3,4-dihydroxyphenylacetate 2,3-dioxygenase, into its chromosome. When the constructed strain was immobilized, both enzyme stability and viability increased along the studied period, in absence of antibiotic. We proposed this strategy as an approach to overcoming plasmid instability and to enhance enzyme activity and stability, avoiding antibiotic utilization. A model was developed to understand and predict the behaviour of bacteria and pollutants in a bioreactor system, considering: fluid dynamics, molecular/cellular scale processes and biofilm formation. 相似文献
78.
79.
Bello-Pineda J Liceaga-Correa MA Hernández-Núñez H Ponce-Hernández R 《Environmental monitoring and assessment》2005,105(1-3):145-164
Management of coral reef resources is a challenging task, in many cases, because of the scarcity or inexistence of accurate sources of information and maps. Remote sensing is a not intrusive, but powerful tool, which has been successfully used for the assessment and mapping of natural resources in coral reef areas. In this study we utilized GIS to combine Landsat TM imagery, aerial photography, aerial video and a digital bathymetric model, to assess and to map submerged habitats for Alacranes reef, Yucatán, México. Our main goal was testing the potential of aerial video as the source of data to produce training areas for the supervised classification of Landsat TM imagery. Submerged habitats were ecologically characterized by using a hierarchical classification of field data. Habitats were identified on an overlaid image, consisting of the three types of remote sensing products and the bathymetric model. Pixels representing those habitats were selected as training areas by using GIS tools. Training areas were used to classify the Landsat TM bands 1, 2 and 3 and the bathymetric model by using a maximum likelihood algorithm. The resulting thematic map was compared against field data classification to improve habitats definition. Contextual editing and reclassification were used to obtain the final thematic map with an overall accuracy of 77%. Analysis of aerial video by a specialist in coral reef ecology was found to be a suitable source of information to produce training areas for the supervised classification of Landsat TM imagery in coral reefs at a coarse scale. 相似文献
80.
Study on the toxicity of binary equitoxic mixtures of metals using the luminescent bacteria Vibrio fischeri as a biological target 总被引:3,自引:0,他引:3
Results from two mathematical approaches to predict the toxicity of all the possible binary equitoxic mixtures of Co, Cd, Cu, Zn and Pb were compared to the observed toxicity of these mixtures to Vibrio fischeri bacteria. Combined effect of the metals was found to be antagonistic for Co-Cd, Cd-Zn, Cd-Pb and Cu-Pb, synergistic for Co-Cu and Zn-Pb and merely additive in other cases, revealing a complex pattern of possible interactions. Besides, Cd appears much less toxic to the bacterial model than to animal cells. The synergistic effect of the Co-Cu combination and the strong lowering of Pb toxicity in the presence of Cd deserve much attention when establishing environmental safety regulations. 相似文献