全文获取类型
收费全文 | 180篇 |
免费 | 2篇 |
国内免费 | 1篇 |
专业分类
安全科学 | 4篇 |
废物处理 | 8篇 |
环保管理 | 24篇 |
综合类 | 63篇 |
基础理论 | 28篇 |
污染及防治 | 42篇 |
评价与监测 | 11篇 |
社会与环境 | 2篇 |
灾害及防治 | 1篇 |
出版年
2023年 | 1篇 |
2021年 | 3篇 |
2020年 | 3篇 |
2019年 | 1篇 |
2018年 | 3篇 |
2017年 | 7篇 |
2016年 | 6篇 |
2015年 | 9篇 |
2014年 | 6篇 |
2013年 | 17篇 |
2012年 | 10篇 |
2011年 | 9篇 |
2010年 | 8篇 |
2009年 | 6篇 |
2008年 | 10篇 |
2007年 | 7篇 |
2006年 | 9篇 |
2005年 | 12篇 |
2004年 | 7篇 |
2003年 | 11篇 |
2002年 | 9篇 |
2001年 | 5篇 |
1998年 | 2篇 |
1996年 | 2篇 |
1995年 | 3篇 |
1994年 | 3篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 2篇 |
1989年 | 2篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1979年 | 1篇 |
1978年 | 1篇 |
1975年 | 1篇 |
排序方式: 共有183条查询结果,搜索用时 15 毫秒
181.
182.
Johanna J. Vollenweider Ron A. Heintz Lawrence Schaufler Robert Bradshaw 《Marine Biology》2011,158(2):413-427
Quantifying the nutritional quality of forage fish is integral for understanding upper trophic levels as forage fish are the
dominant prey for top predator fish, marine mammals, and sea birds. Many existing reports documenting body composition of
forage species are not comparable due to confounding effects. This study systematically assessed the variability in proximate
composition and energy content of 16 forage species in southeastern Alaska (57.2626 N/133.7394 W) between 2001 and 2004. Variation
in energy and lipid contents was related to habitat, epipelagic planktivores varying most, mesopelagics intermediate, and
demersal species relatively invariable. Season was the greatest source of variation as a result of short growing seasons at
high latitude and energy allocation strategies for reproduction and growth. Among species that varied seasonally, energy and
lipid increased over summer and declined during winter. Annual differences in body composition occurred during periods of
peak energy content. Sampling recommendations and guidance for bioenergetics models are provided. 相似文献
183.
This study analyses disparities in the provision of environmental services in Jerusalem, specifically through the distribution of recycling bins. The allocation of recycling bins in Jerusalem is uneven. Some neighbourhoods have more than their share of infrastructure, while others do not have any recycling bins at all. The spatial distribution of recycling bins throughout the city is analysed across the ethno-religious and socioeconomic divides, enabling us to determine whether the opportunity to recycle is a right or a privilege. The findings demonstrate that the Arab areas are literally not serviced. Ultra-Orthodox (Haredi) Jewish neighbourhoods are discriminated against unless socioeconomic levels and population size are controlled. Therefore, waste-management policies reproduce social inequalities resulting in environmental injustice. Due to the fact that recycling in Jerusalem is voluntary and not obligatory, and that in general the public wants to recycle, the opportunity to recycle is indeed a privilege. 相似文献