全文获取类型
收费全文 | 302篇 |
免费 | 0篇 |
专业分类
安全科学 | 2篇 |
废物处理 | 6篇 |
环保管理 | 8篇 |
综合类 | 147篇 |
基础理论 | 44篇 |
污染及防治 | 69篇 |
评价与监测 | 12篇 |
社会与环境 | 12篇 |
灾害及防治 | 2篇 |
出版年
2021年 | 3篇 |
2018年 | 8篇 |
2017年 | 4篇 |
2015年 | 8篇 |
2014年 | 13篇 |
2013年 | 8篇 |
2012年 | 6篇 |
2011年 | 5篇 |
2010年 | 12篇 |
2009年 | 10篇 |
2008年 | 8篇 |
2007年 | 9篇 |
2006年 | 8篇 |
2005年 | 8篇 |
2004年 | 6篇 |
2003年 | 8篇 |
2002年 | 7篇 |
1998年 | 7篇 |
1996年 | 7篇 |
1995年 | 3篇 |
1993年 | 4篇 |
1975年 | 2篇 |
1971年 | 3篇 |
1969年 | 2篇 |
1966年 | 4篇 |
1965年 | 7篇 |
1964年 | 2篇 |
1963年 | 8篇 |
1962年 | 5篇 |
1961年 | 4篇 |
1960年 | 5篇 |
1959年 | 5篇 |
1958年 | 6篇 |
1957年 | 3篇 |
1956年 | 11篇 |
1955年 | 10篇 |
1954年 | 5篇 |
1953年 | 4篇 |
1952年 | 2篇 |
1950年 | 2篇 |
1949年 | 2篇 |
1947年 | 2篇 |
1942年 | 2篇 |
1940年 | 2篇 |
1939年 | 4篇 |
1934年 | 3篇 |
1933年 | 2篇 |
1929年 | 2篇 |
1925年 | 2篇 |
1918年 | 2篇 |
排序方式: 共有302条查询结果,搜索用时 15 毫秒
31.
Sven Rannow Nicholas A. Macgregor Juliane Albrecht Humphrey Q. P. Crick Michael Förster Stefan Heiland Georg Janauer Mike D. Morecroft Marco Neubert Anca Sarbu Jadwiga Sienkiewicz 《Environmental management》2014,54(4):732-743
The implementation of adaptation actions in local conservation management is a new and complex task with multiple facets, influenced by factors differing from site to site. A transdisciplinary perspective is therefore required to identify and implement effective solutions. To address this, the International Conference on Managing Protected Areas under Climate Change brought together international scientists, conservation managers, and decision-makers to discuss current experiences with local adaptation of conservation management. This paper summarizes the main issues for implementing adaptation that emerged from the conference. These include a series of conclusions and recommendations on monitoring, sensitivity assessment, current and future management practices, and legal and policy aspects. A range of spatial and temporal scales must be considered in the implementation of climate-adapted management. The adaptation process must be area-specific and consider the ecosystem and the social and economic conditions within and beyond protected area boundaries. However, a strategic overview is also needed: management at each site should be informed by conservation priorities and likely impacts of climate change at regional or even wider scales. Acting across these levels will be a long and continuous process, requiring coordination with actors outside the “traditional” conservation sector. To achieve this, a range of research, communication, and policy/legal actions is required. We identify a series of important actions that need to be taken at different scales to enable managers of protected sites to adapt successfully to a changing climate. 相似文献
32.
Rodrigo Navia Georg Hafner Georg Raber Karl E Lorber Elke Sch?ffmann Walter Vortisch 《Waste management & research》2005,23(3):249-259
The main physicochemical characteristics of the volcanic soil of Southern Chile, with allophane as the main pedogenic mineral phase were analysed and compared with common zeolites (clinoptilolite) of the European market. The ultimate goal of this study was to test volcanic soil for the use as mineral landfill liner. The main results indicated that the clay and silt fractions together of the volcanic soil were between 38 and 54%. The buffering capacity of the volcanic soil was higher compared with the studied zeolites, whereas the cationic exchange capacity of the volcanic soil (between 5.2 and 6.5 cmol + kg(-1)) is of the same order of magnitude of the studied zeolites (between 9.7 and 11.4 cmol + kg(-1)). Moreover, the anionic exchange capacity of the volcanic soil was higher compared to the zeolites analysed. The hydraulic conductivity of the volcanic soil, measured in the laboratory at maximum proctor density, ranges between 5.16 x 10(-9) and 6.48 x 10(-9) m s(-1), a range that is comparable to the value of 4.51 x 10(-9) m s(-1) of the studied zeolite. The Proctor densities of the volcanic soil are in a lower range (between 1.11 and 1.15 g ml(-1)) compared with zeolites (between 1.19 and 1.34 g ml(-1)). The volcanic soil physicochemical characteristics are comparable to all the requirements established in the Austrian landfill directive (DVO, 2000). Therefore, the use as mineral landfill basal sealing of the analysed volcanic soil appears reasonable, having a pollutant adsorption capacity comparable to zeolites. It is of special interest for Southern Chile, because there are no alternative mineral raw materials for basal liners of landfills. 相似文献
33.
34.
35.
36.
37.
Becher G 《Chemosphere》2005,58(7):989-991
1,2,5,6,9,10-Hexabromocyclododecane, a widely used additive flame retardant, is produced by bromination of cis,trans,trans-cyclododeca-1,5,9-triene, resulting in a mixture of three enantiomeric pairs of diastereomers. We present here the correct configuration and graphic representation of the six isomers. Recently, the complete separation of all six isomers has been achieved using chiral liquid chromatography. 相似文献
38.
39.
40.
Hans Georg Schnering 《Die Naturwissenschaften》1961,48(21):665-666