全文获取类型
收费全文 | 293篇 |
免费 | 2篇 |
专业分类
安全科学 | 16篇 |
废物处理 | 11篇 |
环保管理 | 31篇 |
综合类 | 47篇 |
基础理论 | 68篇 |
污染及防治 | 96篇 |
评价与监测 | 10篇 |
社会与环境 | 13篇 |
灾害及防治 | 3篇 |
出版年
2022年 | 3篇 |
2021年 | 3篇 |
2020年 | 9篇 |
2019年 | 3篇 |
2018年 | 1篇 |
2017年 | 7篇 |
2016年 | 14篇 |
2015年 | 10篇 |
2014年 | 16篇 |
2013年 | 14篇 |
2012年 | 14篇 |
2011年 | 31篇 |
2010年 | 18篇 |
2009年 | 17篇 |
2008年 | 13篇 |
2007年 | 21篇 |
2006年 | 20篇 |
2005年 | 18篇 |
2004年 | 17篇 |
2003年 | 3篇 |
2002年 | 6篇 |
2001年 | 3篇 |
1999年 | 4篇 |
1998年 | 3篇 |
1997年 | 2篇 |
1995年 | 3篇 |
1994年 | 3篇 |
1993年 | 1篇 |
1992年 | 4篇 |
1991年 | 1篇 |
1990年 | 4篇 |
1989年 | 1篇 |
1987年 | 1篇 |
1986年 | 3篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1977年 | 1篇 |
1960年 | 1篇 |
排序方式: 共有295条查询结果,搜索用时 15 毫秒
291.
Ho Long Jerves-Cobo Ruben Barthel Matti Six Johan Bode Samuel Boeckx Pascal Goethals Peter 《Environmental science and pollution research international》2022,29(25):37277-37290
Environmental Science and Pollution Research - Rivers act as a natural source of greenhouse gases (GHGs). However, anthropogenic activities can largely alter the chemical composition and microbial... 相似文献
292.
Reduced take-off ability in robins (Erithacus rubecula) due to migratory fuel load 总被引:11,自引:0,他引:11
Lind Johan Fransson Thord Jakobsson Sven Kullberg Cecillia 《Behavioral ecology and sociobiology》1999,46(1):65-70
Recent studies have shown that large fuel loads in small birds impair flying ability. This is the first study to show how
migratory fuel load affects flying ability, such as velocity and height gained at take-off in a predator escape situation,
in a medium-distance migrant, and whether they adjust their take-off according to predator attack angle. First-year robins
(Erithacus rubecula) were subjected to simulated attacks from a model merlin (Falco columbarius), and take-off velocity and angle were analysed. Robins with a wing load of 0.19 g cm−2 took off at a 39% lower angle than robins with a wing load of 0.13 g cm−2, while velocity remained unaffected. The robins did not adjust their angle of ascent in accordance with the predator's angle
of attack. Since many predators rely on surprise attacks, a difference in flight ability due to varying fuel loads found in
migrating robins can be important for birds' chances of survival when actually attacked.
Received: 28 October 1998 / Received in revised form: 12 January 1999 / Accepted: 30 January 1999 相似文献
293.
Burnout is considered to be a long‐term reaction to occupational stress. It is characterized by emotional exhaustion, depersonalization, and diminished personal accomplishment. The most widely used instrument to measure burnout is the Maslach Burnout Inventory (MBI), developed by Maslach and Jackson (1986). From this instrument, Schaufeli and van Dierendonck (1995a) developed a somewhat modified Dutch version: the MBI‐NL. Burnout among dentists has hardly been studied. Since the professions that the MBI‐NL was developed upon are quite different from dentistry, the aim of this study was to test the three‐factor structure of the MBI‐NL against alternative structures among dentists. Both principal components analysis (PCA) and confirmatory factor analysis (CFA) were examined in a representative sample of 709 Dutch general dental practitioners (75 per cent response rate). The three‐factor structure shows the best fit to the underlying data, while other psychometric qualities are very satisfactory. It is concluded that the three‐factor structure of the MBI‐NL is superior to alternative structures, and that the MBI‐NL is a highly suitable instrument to measure burnout among dentists. Copyright © 1999 John Wiley & Sons, Ltd. 相似文献
294.
The input of acidity to Swedish forest soils through forestry between 1955 and 2010 is compared with the acid input from atmospheric deposition. Depending on region, input of acidity from forestry was the minor part (25–45%) of the study period’s accumulated acid input but is now the dominating source (140–270 molc ha−1 year−1). The net uptake of cations due to the increase in standing forest biomass, ranged between 35 and 45% of the forestry related input of acidity while whole-tree harvesting, introduced in the late 1990s, contributed only marginally (< 2%). The geographical gradient in acid input is reflected in the proportion of acidified soils in Sweden but edaphic properties contribute to variations in acidification sensitivity. It is important to consider the acid input due to increases in standing forest biomass in acidification assessments since it is long-term and quantitatively important.Supplementary InformationThe online version contains supplementary material available at 10.1007/s13280-021-01540-y. 相似文献
295.
Reducing hazard vulnerability: towards a common approach between disaster risk reduction and climate adaptation 总被引:25,自引:0,他引:25
Over the past few decades, four distinct and largely independent research and policy communities--disaster risk reduction, climate change adaptation, environmental management and poverty reduction--have been actively engaged in reducing socio-economic vulnerability to natural hazards. However, despite the significant efforts of these communities, the vulnerability of many individuals and communities to natural hazards continues to increase considerably. In particular, it is hydro-meteorological hazards that affect an increasing number of people and cause increasingly large economic losses. Arising from the realisation that these four communities have been largely working in isolation and enjoyed only limited success in reducing vulnerability, there is an emerging perceived need to strengthen significantly collaboration and to facilitate learning and information exchange between them. This article examines key communalities and differences between the climate change adaptation and disaster risk reduction communities, and proposes three exercises that would help to structure a multi-community dialogue and learning process. 相似文献