全文获取类型
收费全文 | 98篇 |
免费 | 0篇 |
国内免费 | 1篇 |
专业分类
安全科学 | 3篇 |
废物处理 | 10篇 |
环保管理 | 13篇 |
综合类 | 10篇 |
基础理论 | 20篇 |
环境理论 | 1篇 |
污染及防治 | 32篇 |
评价与监测 | 3篇 |
社会与环境 | 7篇 |
出版年
2023年 | 1篇 |
2022年 | 2篇 |
2021年 | 1篇 |
2020年 | 2篇 |
2019年 | 2篇 |
2018年 | 6篇 |
2017年 | 6篇 |
2016年 | 6篇 |
2015年 | 4篇 |
2014年 | 4篇 |
2013年 | 9篇 |
2012年 | 3篇 |
2011年 | 11篇 |
2010年 | 5篇 |
2009年 | 2篇 |
2008年 | 3篇 |
2007年 | 2篇 |
2006年 | 2篇 |
2005年 | 3篇 |
2004年 | 4篇 |
2003年 | 8篇 |
2002年 | 5篇 |
2001年 | 1篇 |
2000年 | 1篇 |
1998年 | 1篇 |
1996年 | 1篇 |
1994年 | 2篇 |
1988年 | 1篇 |
1986年 | 1篇 |
排序方式: 共有99条查询结果,搜索用时 234 毫秒
91.
Christian Sonne Silje A.B. Mæhre Kjetil Sagerup Mikael Harju Eldbjørg Sofie Heimstad Pall S. Leifsson 《毒物与环境化学》2013,95(1):172-186
Concentrations of organochlorine (OC) contaminants and histomorphology of liver, kidney, and thyroid tissues were studied in nine adult and one subadult glaucous gulls (Larus hyperboreus) collected at Svalbard on 2 August 2011. Concentrations of liver polychlorinated biphenyls (PCB; range: 150–2820?ng?g?1 ww), dichlorodiphenyltrichloroethane (DDT; range: 58–724?ng?g?1 ww), and chlordanes (CHL; range: 11–126?ng?g?1 ww) dominated the OC profile followed by hexachlorobenzene (HCB; range: 11–42?ng?g?1 ww), mirex (range: 2–52?ng?g?1 ww), and β-hexachlorocyclohexane (β-HCH; range: 1–7?ng?g?1 ww). Histological examination of the liver showed mononuclear cell infiltrations and granulomas in 10 and 6 gulls, respectively, while intense intrahepatic lipid accumulation (steatosis) was found in two and focal necrosis in one gull. In kidney, glomerular sclerosis and adhesions was found in five and one gull, respectively. Thickening of the glomerular basement membranes and tubular necrosis was found in four and seven gulls, respectively, while mononuclear cell infiltrations were found in two individuals. In the thyroid gland, a high density of small follicles accompanied by follicular epithelial cell proliferation was observed in five glaucous gulls. Gulls with hepatic steatosis had significantly higher ΣDDT levels than the gulls without hepatic steatosis and a similar trend was found for ΣPCB. When normalizing OC concentrations for lipid content in liver, gulls with lipid granulomas had significantly lower β-HCH and significantly higher mirex levels, respectively, than gulls without lipid granulomas. Also; gulls with thickening of the glomerular basement membranes had non-significantly higher ΣPCB levels than gulls without. The histological findings were similar to those of controlled laboratory studies and OC-contaminated wildlife (e.g., polar bears; Ursus maritimus) and the data of this study therefore suggest that OC exposure may be a co-factor in the development of organ alterations in glaucous gulls. However, other environmental factors such as age, element exposure, and infectious micropathogens cannot be ruled out as co-factors, and it is uncertain if the tissue changes found exert adverse health effects on the population of Svalbard glaucous gulls. 相似文献
92.
93.
This paper analyses the political process for handling an outbreak of an insect causing human allergic reactions. In the southern part of the Swedish island Gotland in the Baltic Sea, an outbreak of the northern pine processionary moth, Thaumetopoea pinivora, has occurred. With regard to the human nuisance and long-term effects on the tourist industry, demands have been raised for intervention to reduce and control the insect population. At the same time, there have been warnings against treating the insect population because there are knowledge gaps concerning the wider ecological consequences, including effects on biodiversity. This paper analyses the political process and its problem-solving efforts. Of particular interest is how it dealt with the issue of uncertainty. It was found that the uncertainty associated with the issue hindered the development of a shared understanding of the problem and a possible solution. There seems to be a growing need in society to develop the institutional capacity to handle complex issues that cross different sectors, regulatory frameworks and policy targets. 相似文献
94.
Abstract The focus of this article is the Swedish experience of local governance and climate change, including mitigation and adaptation. The municipal response to these two challenges is set within a broader policy context that acknowledges Sweden as a pioneer in environmental governance, including its comparatively high ambitions with regard to the reduction of greenhouse ga emissions. Central–local relations in climate policy are analysed, and climate change mitigation and adaptation are exemplified by some snapshots of municipal initiatives, including the popular habit of networking between municipalities within as well as across national borders. In conclusion we briefly evaluate the Swedish local governance experience of climate change mitigation and adaptation to date as characterized by radical rhetoric and ambitious goals combined with a lot of promising initiatives, although still with fairly modest results in terms of tangible outcomes. Finally, we reflect upon what we consider to be the most important questions for future research on local governance and climate change. 相似文献
95.
Mikael Larsson Carl-Erik Grip Hans Ohlsson Staffan Rutqvist Jan-Olov Wikström Sten Ångström 《International Journal of Green Energy》2013,10(2):171-183
During the years 2001–2002, a comprehensive study regarding CO2 emissions related to the steel production for the integrated steel making production route, was carried out. The study was financed by SSAB and carried out by a research group with members from SSAB, MEFOS and LTU. The aim was to study the emissions from the existing system and how these could be influenced by process changes and by process modifications. The calculations were made using a global spreadsheet model for calculating the CO2 emissions, developed from an existing Energy and Process Integration model of the same system. The calculated cases included the existing BF/BOF route as well as integration of other processes, e.g., an electric arc furnace, DR processes, COREX and a new future smelting reduction process concept (Sidcomet). All new existing alternative ore based process technologies would increase the specific CO2 emission from the system. A technology transfer to scrap based metallurgy would significantly decrease the emission level, but is not feasible for SSAB, due to the future product mix and the structure of scrap availability. In a 5–20 year perspective, the existing steel making process route with the use of magnetite ore for pellet production has the lowest specific CO2 emission. In a long-term perspective, 20–50 years, alternative process routes, e.g., based on H2 and DRI, could be of interest. Studies on such changes are, however, big projects and should be carried out as joint European and/or international efforts. 相似文献
96.
Thomas Prade Lovisa Björnsson Mikael Lantz Serina Ahlgren 《Journal of Land Use Science》2017,12(6):407-441
The increasing biofuel production from agricultural crops has been suggested to cause indirect land use change (iLUC). This increases interest in biofuel feedstocks that qualify as iLUC-free: (1) residues without a market, (2) crops from previously unused arable land, (3) additional crops and (4) biomass from intensified production. In the present study, biofuel potential from such feedstocks was quantified for Sweden and compared against the predicted biofuel demand from agricultural resources in 2030. The results indicate that straw (category 1) could cover up to 37% of future biofuel demand. Grass leys from intensified production (category 4), set-aside and abandoned land (category 2) and excess grass silage (category 1) could cover up to 79%. Intermediate and ecological focus area crops (category 3) could contribute up to 21%. To realize the biofuel targets, a high implementation rate of additional iLUC-free feedstock is needed. Future studies need to investigate impacts of low-iLUC policies. 相似文献
97.
Sofia Ribeiro Mikael K. Sejr Audrey Limoges Maija Heikkilä Thorbjørn Joest Andersen Petra Tallberg Kaarina Weckström Katrine Husum Matthias Forwick Tage Dalsgaard Guillaume Massé Marit-Solveig Seidenkrantz Søren Rysgaard 《Ambio》2017,46(1):106-118
In order to establish a baseline for proxy-based reconstructions for the Young Sound–Tyrolerfjord system (Northeast Greenland), we analysed the spatial distribution of primary production and sea ice proxies in surface sediments from the fjord, against monitoring data from the Greenland Ecosystem Monitoring Programme. Clear spatial gradients in organic carbon and biogenic silica contents reflected marine influence, nutrient availability and river-induced turbidity, in good agreement with in situ measurements. The sea ice proxy IP25 was detected at all sites but at low concentrations, indicating that IP25 records from fjords need to be carefully considered and not directly compared to marine settings. The sea ice-associated biomarker HBI III revealed an open-water signature, with highest concentrations near the mid-July ice edge. This proxy evaluation is an important step towards reliable palaeoenvironmental reconstructions that will, ultimately, contribute to better predictions for this High Arctic ecosystem in a warming climate. 相似文献
98.
99.
Improved benthic conditions compared to the 1990s were found during benthic investigations, including sediment and benthic
macrofauna in the inner Stockholm archipelago during 2008. In the 1990s, these areas were dominated by black and laminated
surface sediments and very sparse fauna. A clear relationship was found when comparing sediment status with the benthic macrofauna.
Reduced surface sediment and impoverished macroinvertebrate community was only found at one sampling station representing
an enclosed part of the inner archipelago, whereas the other seven stations, with depths ranging from 20 to 50 m, had oxidized
surface sediments and considerable biomasses of benthic macrofauna (6–65 g m−2) dominated by the invading polychaete Marenzelleria neglecta. An extrapolation of the results shows that, within the investigated area, the coverage of reduced surface sediments had decreased
from approximately 17% in the late 1990s to 4% in 2008. 相似文献