全文获取类型
收费全文 | 449篇 |
免费 | 12篇 |
国内免费 | 14篇 |
专业分类
安全科学 | 9篇 |
废物处理 | 5篇 |
环保管理 | 90篇 |
综合类 | 112篇 |
基础理论 | 129篇 |
环境理论 | 2篇 |
污染及防治 | 78篇 |
评价与监测 | 28篇 |
社会与环境 | 18篇 |
灾害及防治 | 4篇 |
出版年
2023年 | 9篇 |
2022年 | 10篇 |
2021年 | 13篇 |
2020年 | 5篇 |
2019年 | 8篇 |
2018年 | 19篇 |
2017年 | 16篇 |
2016年 | 18篇 |
2015年 | 22篇 |
2014年 | 20篇 |
2013年 | 29篇 |
2012年 | 22篇 |
2011年 | 28篇 |
2010年 | 24篇 |
2009年 | 19篇 |
2008年 | 38篇 |
2007年 | 31篇 |
2006年 | 20篇 |
2005年 | 16篇 |
2004年 | 15篇 |
2003年 | 8篇 |
2002年 | 9篇 |
2001年 | 8篇 |
2000年 | 2篇 |
1999年 | 4篇 |
1998年 | 8篇 |
1997年 | 3篇 |
1995年 | 10篇 |
1994年 | 3篇 |
1993年 | 5篇 |
1992年 | 3篇 |
1991年 | 3篇 |
1990年 | 5篇 |
1989年 | 3篇 |
1988年 | 2篇 |
1987年 | 4篇 |
1986年 | 6篇 |
1985年 | 2篇 |
1983年 | 1篇 |
1981年 | 1篇 |
1979年 | 1篇 |
1975年 | 1篇 |
1974年 | 1篇 |
排序方式: 共有475条查询结果,搜索用时 109 毫秒
51.
Pérez-de-Mora A Madejón P Burgos P Cabrera F Lepp NW Madejón E 《Environmental pollution (Barking, Essex : 1987)》2011,159(10):3018-3027
We investigated the efficiency of various by-products (sugarbeet lime, biosolid compost and leonardite), based on single or repeated applications to field plots, on the establishment of a vegetation cover compatible with a stabilization strategy on a multi-element (As, Cd, Cu, Pb and Zn) contaminated soil 4-6 years after initial amendment applications. Results indicate that the need for re-treatment is amendment- and element-dependent; in some cases, a single application may reduce trace element concentrations in above-ground biomass and enhance the establishment of a healthy vegetation cover. Amendment performance as evaluated by % cover, biomass and number of colonizing taxa differs; however, changes in plant community composition are not necessarily amendment-specific. Although the translocation of trace elements to the plant biotic compartment is greater in re-vegetated areas, overall loss of trace elements due to soil erosion and plant uptake is usually smaller compared to that in bare soil. 相似文献
52.
53.
54.
Bacterial community structure in soils contaminated by polycyclic aromatic hydrocarbons 总被引:1,自引:0,他引:1
Bacterial community structure was examined in polycyclic aromatic hydrocarbon (PAH) contaminated soil taken from a timber treatment facility in southern Ireland. Profiles of soil bacterial communities were generated using a molecular fingerprinting technique, terminal restriction fragment length polymorphism (TRFLP), and results were interpreted using sophisticated multivariate statistical analysis. Findings suggested that there was a correlation between PAH structure and bacterial community composition. Initial characterisation of soil from the timber treatment facility indicated that PAH contamination was unevenly distributed across the site. Bacterial community composition was correlated with the type of PAH present, with microbial community structure associated with soil contaminated with two-ringed PAHs only being distinctly different to communities in soils contaminated with multi-component PAH mixtures. Typically the number of bacterial ribotypes detected in samples did not appear to be adversely affected by the level of contamination. 相似文献
55.
56.
57.
58.
59.
Microcystin-LR (MC-LR) was readily biodegraded on addition to six different water samples irrespective of their previous exposure to microcystins. Subsequent studies with water from three of these water bodies confirmed the degradation of MC-LR and also demonstrated the biodegradation of MC-LF, nodularin and mixture of microcystins and nodularin. Rates of degradation of MC-LR, MC-LF and NOD in individual water samples ranged from a half-life of 4 to 18d. Analysis by HPLC-PDA-ESI+ and MALDI MS/MS revealed novel intermediate degradation products of MC-LF and nodularin which included demethylation, hydrolysis, decarboxylation and condensation of the parent compound(s). Our study suggests a possible diversity of micro-organisms and/or pathways which has not been previously observed. 相似文献
60.
Dag Elgesem Lubos Steskal Nicholas Diakopoulos 《Environmental Communication: A Journal of Nature and Culture》2015,9(2):169-188
Based on the texts of 1.3 million blog posts and the structure of the links between the blogs in which these posts appeared, this study presents an analysis of the discourse on climate change in the English-language blogosphere. Our approach combines community detection with probabilistic topic modeling to show how topics related to climate change are discussed across various parts of the blogosphere. We find that there is one community of predominantly climate skeptical blogs but several accepter communities. The topic analysis reveals a series of issues that are characteristic of the climate change discourse in the blogosphere. Two topics, one related to climate change science and one related to climate change politics, are particularly important for characterizing the discourse. We also find that the distribution of topics over the communities cuts across the divide between skeptics and non-skeptics (accepters) and that there are differences in the patterns of interactions between the skeptics and different groups of accepters. 相似文献