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 | 14篇 |
综合类 | 10篇 |
基础理论 | 20篇 |
环境理论 | 1篇 |
污染及防治 | 31篇 |
评价与监测 | 3篇 |
社会与环境 | 7篇 |
出版年
2023年 | 1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 | 10篇 |
2010年 | 5篇 |
2009年 | 2篇 |
2008年 | 3篇 |
2007年 | 2篇 |
2006年 | 3篇 |
2005年 | 3篇 |
2004年 | 4篇 |
2003年 | 9篇 |
2002年 | 5篇 |
2001年 | 1篇 |
2000年 | 2篇 |
1998年 | 1篇 |
1996年 | 1篇 |
1994年 | 1篇 |
1988年 | 1篇 |
1986年 | 1篇 |
1981年 | 1篇 |
排序方式: 共有99条查询结果,搜索用时 685 毫秒
91.
Raymond H. G. Klaassen Roine Strandberg Mikael Hake Thomas Alerstam 《Behavioral ecology and sociobiology》2008,62(9):1427-1432
We used novel Global Positioning System-based satellite telemetry to reconstruct daily time budgets on travelling days of
a long-distance migrant, the Osprey Pandion haliaetus, to reveal how landscape affects migratory performance. We compared daily travel routines between the Ospreys’ passage of
Europe and the Sahara. In Europe, where feeding habitat is abundant, Ospreys fed both before–after flights and during interruptions,
thus, combining migration with foraging. This resulted in a 2.7-h shorter daily flight period in Europe than in the Sahara.
A calculated energy budget indicated that a ‘fly-and-forage migration strategy’ is favourable in Europe because associated
benefits (energy intake) more than outweigh costs (reduced flight time). The much shorter flight time in Europe was the main
explanation why Ospreys covered on average 78 km less distance on a travelling day in Europe than in the Sahara. In addition,
there were regional differences in hourly flight speeds that are most probably the result of variation in thermal soaring
conditions. We conclude that landscape properties have a profound effect on migration through regional variation in daily
routines. 相似文献
92.
93.
Mikael Jensen 《Environment, Development and Sustainability》2009,11(1):215-228
The concept of lifestyle is rather difficult to pin down. It is used in a variety of disciplines and related to many different problems. In our highly modern society, lifestyle is more often mentioned as something we need to change in order to achieve a sustainable development. Our main interest then is how we create and change a lifestyle. How can we understand why it is sometimes difficult to achieve change? In relation to terms like beliefs, desires, intentions, habits and artefacts six factors will be suggested. Within these factors we may have a foundation for a mechanism underlying the creation and change of lifestyle. A definition of the concept of lifestyle from a cognitive science perspective will also be suggested, as derived from the same foundation and terms related to it. 相似文献
94.
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
95.
Ann-Christine Albertsson Mikael Gröning Minna Hakkarainen 《Journal of Polymers and the Environment》2006,14(1):9-13
Emission of low molar mass compounds from different polymeric materials was determined and the results from the volatile analysis
were applied to predict the degree of degradation and long-term properties, to determine degradation rates and mechanisms,
to differentiate between biotic and abiotic degradation and for quality control work. Solid-phase microextraction and solid-phase
extraction together with GC-MS were applied to identify and quantify the low molar mass compounds. Volatiles were released
and monitored at early stages of degradation before any matrix changes were observed by e.g. SEC, DSC and tensile testing.
The analysis of volatiles can thus also be applied to detect small differences between polymeric materials and their susceptibility
to degradation. The formation of certain degradation products correlated with the changes taking place in the polymer matrix,
these indicator products could, thus, be analysed to rapidly predict the degree of degradation in the polymer matrix and further
to predict the long-term properties and remaining lifetime of the product. 相似文献
96.
97.
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
98.
99.
Biodiversity offsetting is an increasingly applied tool aiming to compensate for environmental damage caused by exploitation projects. Critics, however, raise concerns over the purported effectiveness of offsetting and question the ethical underpinnings and implications of offsetting. These ethical dimensions have largely been overlooked in research, which may lead to offsetting systems that fail to respect the values intended to be safeguarded. To address these dimensions, 5 ethical objections in the scientific literature were identified: offsetting violates nature's intrinsic value; losses of nature cannot be compensated for by human interventions; too little is known to make adequate trades; offsetting impedes virtuous dispositions toward nature; and offsetting has negative justice implications. We examined these objections and arguments against them based on the ethical concepts of intrinsic and instrumental values, anthropocentrism, nonanthropocentrism, and deontological, consequentialist, and virtue-ethical paradigms. Both nonanthropocentric and anthropocentric concerns were expressed in deontological, consequential, and virtue-ethical framings. Objections mostly had a deontological or virtue-ethical basis, whereas counterarguments were based on consequential reasoning, but common ground in practice is often conceivable. Based on our findings, we formulated 10 recommendations for policy makers and 5 questions for practitioners to consider. We propose, for example, that policy makers clarify aims, legislate on no-go areas, and govern the use of multipliers. We suggest that practitioners consider, for instance, how to improve case-specific knowledge and promote learning and stakeholder engagement. We hope these recommendations and questions will encourage further discussion of the ethics of biodiversity offsets and ultimately strengthen the respect for biodiversity and human-welfare values at stake in offsetting projects. 相似文献