全文获取类型
收费全文 | 282篇 |
免费 | 5篇 |
国内免费 | 1篇 |
专业分类
安全科学 | 8篇 |
废物处理 | 20篇 |
环保管理 | 32篇 |
综合类 | 37篇 |
基础理论 | 57篇 |
环境理论 | 1篇 |
污染及防治 | 110篇 |
评价与监测 | 13篇 |
社会与环境 | 9篇 |
灾害及防治 | 1篇 |
出版年
2023年 | 1篇 |
2022年 | 4篇 |
2021年 | 7篇 |
2020年 | 3篇 |
2019年 | 3篇 |
2018年 | 4篇 |
2017年 | 5篇 |
2016年 | 12篇 |
2015年 | 7篇 |
2014年 | 6篇 |
2013年 | 22篇 |
2012年 | 17篇 |
2011年 | 22篇 |
2010年 | 16篇 |
2009年 | 19篇 |
2008年 | 13篇 |
2007年 | 17篇 |
2006年 | 12篇 |
2005年 | 9篇 |
2004年 | 31篇 |
2003年 | 10篇 |
2002年 | 4篇 |
2001年 | 13篇 |
2000年 | 1篇 |
1999年 | 3篇 |
1998年 | 2篇 |
1997年 | 2篇 |
1996年 | 2篇 |
1995年 | 2篇 |
1991年 | 4篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1986年 | 2篇 |
1985年 | 1篇 |
1984年 | 2篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1977年 | 1篇 |
1976年 | 1篇 |
1974年 | 1篇 |
1940年 | 1篇 |
1935年 | 1篇 |
排序方式: 共有288条查询结果,搜索用时 15 毫秒
151.
Lotta Johansson Kerstin Wallstrom 《Ambio-人类环境杂志》2001,30(4):277-281
从历史的角度看,斯德哥尔摩市居民人数的增长对周围湖泊和沿岸地区的水质产生了负面影响.自19世纪中叶以来,政府的治理和为改善水质所采取的措施一直在进行中.由于采样很少,而且使用了不同的参数和方法,因此很难根据首次化学和生物调查结果来评估与以后若干年相比较的19世纪的水况.但是,可以根据开始于20世纪初的浮游生物调查的结果对水质进行一次回顾性评价.在具有与整个20世纪相似温度条件的夏季对反映富营养状况的蓝藻Planktothrixagardhii的发生进行了调查.调查结果表明,从20世纪初到90年代初.在斯德哥尔摩群岛,富营养化条件可能一直占优势.20世纪的最后10年,水质似乎比l00年前要好.今天较好的水况很可能是在度水处理方面采取适当措施的结果. 相似文献
152.
Sheng Fulai Gary Flomenhoft Timothy J. Downs MaÁngeles Grande‐Ortiz Dana Graef Bert Scholtens Arthur P.J. Mol David A. Sonnenfeld Gert Spaargaren Rajeev K. Goel Edward W.T. Hsieh Serban Scrieciu Reinhard Steurer Christine Polzin Genia Kostka Tiho Ancev Elke Pirgmaier Frank Boons Karl‐Henrik Robèrt Christopher Bryant Ke Zhou Surya Raj Acharya David Huberman Denis J. Sonwa Michelle Mycoo Dabo Guan Klaus Hubacek U. Rashid Sumaila Hector G. Lopez‐Ruiz G. Jason Jolley Michael L. Dougherty André Francisco Pilon Ravi Prakash Tulus Tambunan Sebastian Hermann 《Natural resources forum》2011,35(1):63-72
153.
Sigr��n H. J��nasd��ttir J?rg Dutz Marja Koski Lidia Yebra Hans Henrik Jakobsen Charles Vidoudez Georg Pohnert Jens C. Nejstgaard 《Marine Biology》2011,158(9):1943-1963
Egg and faecal pellet production and egg hatching success of the calanoid copepod Calanus finmarchicus were monitored over a period of 14?days (14?C28 April, 2008) while fed water from 4 differently treated mesocosms and ambient water. Two of the mesocosms used were inoculated with the polyunsaturated aldehyde (PUA)-producing diatom Skeletonema marinoi, while 2 received only nutrient additions with or without silica. The mesocosms developed blooms of S. marinoi, mixed diatoms or the haptophyte Phaeocystis pouchetii, respectively. Faecal pellet production of C. finmarchicus increased with increasing food availability. Egg production increased with time in all mesocosms to a maximum single female production of 232 eggs female?1?day?1 (average of 90 eggs female?1?day?1) and followed the development of ciliates and P. pouchetii, but was not affected by the observed high (up to 15?nmol?L?1) PUA production potential of the phytoplankton. The hatching success of the eggs produced on the mesocosm diets was high (78?C96%) and was not affected by either aldehydes in the maternal diet or exposure to the dissolved aldehydes in the water. 相似文献
154.
155.
Olle Ericsson Tarja Ahola Fredrik Dahl Filip Karlsson Fredrik Persson Olof Karlberg Fredrik Roos Ida Alftrén Björn Andersson Emelie Barkenäs Ani Boghos Birgit Brandner Jenny Dahlberg Per-Ola Forsgren Niels Francois Anna Gousseva Faizan Hakamali Åsa Janfalk-Carlsson Henrik Johansson Johanna Lundgren Atefeh Mohsenchian Linus Olausson Simon Olofsson Atif Qureshi Björn Skarpås Peter Svahn Anna Sävneby Eva Åström Anna Sahlberg Aino Fianu-Jonasson Jérémie Gautier Jean-Marc Costa Bo Jacobsson Kypros Nicolaides 《黑龙江环境通报》2019,39(11):1011-1015
156.
Henrik Kylin 《Environmental science and pollution research international》1996,3(4):218-223
Many environmental contaminants known today are semivolatile organic compounds (SOC) and are present in the atmosphere. Airborne SOC are taken up and enriched by the epicuticular wax that covers leaves of higher plants. The purpose of the present work was to use pine needles 1) to map the distribution of airborne SOC in Europe, 2) to identify source regions, and 3) to identify hitherto unknown anthropogenic and/or natural substances. Some of the results were a confirmation of a suspected release of DDT in the former East Germany, high levels of pentachlorophenol were noted in Scandinavia, hexachlorocyclohexanes were higher in southern than in northern Europe, whereas PCB and hexachlorbenzene were rather evenly distributed throughout Europe. Elemental sulphur was identified as a previously unknown natural substance in higher plants. 相似文献
157.
Ninna Verland Henrik M. Kaarsholm Rasmus D. Nørregaard Lis Bach Rune Dietz Pall S. Leifsson 《毒物与环境化学》2013,95(5-7):607-628
There is inadequate morphological nomenclature and definition of organ pathology when using wild fish in biomonitoring of environmental pollution. The aim of this investigation was to provide a guide that assesses histology of Shorthorn (Myoxocephalus scorpius) and Fourhorn (Myoxocephalus quadricornis) sculpins obtained from a study using these two fish species as bioindicator organisms to evaluate environmental impact attributed to a dumpsite located in East Greenland. Specific histopathological lesions were quantified on the basis of Bernet et al. and all lesions were photomicrographed, evaluated, and placed into specific categories of five reaction patterns. These were circulatory disturbances, regressive changes, progressive alterations, inflammation, and tumors based on anatomical location, type, and severity. This method is postulated to enable an objective assessment of the histological integrity of fish gills and liver; thus, making it possible to compare sculpin pathology and reaction patterns at different locations. Data suggest that this updated histological guide might be used for identification and quantification of histological lesions when applying sculpins in biomonitoring programs in Greenland and other Arctic regions. 相似文献
158.
Henrik M. Kaarsholm Ninna Verland Rasmus D. Nørregaard Lis Bach Jens Søndergaard Frank F. Rigét 《毒物与环境化学》2013,95(8-10):769-784
AbstractFor many years, the sculpin has been utilized as a sentinel monitoring species for anthropogenic impacts on the marine environment. To further develop its potential as a screening model body burden of several trace elements, including cadmium (Cd), copper (Cu), mercury (Hg), lead (Pb) and selenium (Se), were investigated. In addition, histopathology in shorthorn sculpins (Myoxocephalus scorpius; n?=?20) and fourhorn sculpins (Myoxocephalus quadricornis; n?=?10) were examined at three sites around the Scoresby Sound settlement in Central East Greenland. Fourhorn sculpins caught at the most distant site from the settlement, contained significantly higher hepatic Cu and Cd concentrations as well as significantly elevated gill Pb levels compared to the shorthorn sculpins collected at two other sites closer to the settlement. Histological examinations showed that fish with significantly higher concentrations of hepatic Cd and Se exhibited greater nuclear alterations, interstitial hyperplasia/hypertrophy, interstitial mononuclear infiltrations and granulomas. Further, fish with higher Cd and Cu gill tissue levels displayed a significantly higher number of cytoplasmic alterations and lamellar epithelium lifting, hypertrophic and hyperplastic epithelium along with mucus cell hyperplasia. While the presence of liver lesions were not species or sex-specific, the presence of gill lesions decreased in the order female fourhorn sculpins?>?female shorthorn sculpins?>?male fourhorn sculpins?>?male shorthorn sculpins. Hepatic Hg concentrations exceeded known lowest observable effect doses (LOED) for fish (0.1–0.5?μg g?1 ww) in 27% of fish, while liver Cd residues in 80% exceeded LOED (0.42–1.8?μg g?1 ww). Based upon these results, data suggest that using the sculpin as a valuable sentinel fish species histopathology may serve as a reliable tool for assessing marine ecosystem exposure to trace metals. However, confounding physiological and ecological factors also need to be considered. 相似文献
159.
Ninety-five white-collar workers employed by an insurance company using visual display units (VDU) connected by telecommunication to a central computer filled in a questionnaire concerning psychosocial stressors in connection with work at the VDU. Eleven persons with extensive and ten with no work at VDUs were also studied during regular work, during breakdown of machinery, and in their leisure time. Self-reports on mood and alertness were recorded along with blood pressure, heart rate, and excretion of adrenaline and noradrenaline. Results indicate that (1) stress and mental strain occurred in association with delayed response times in the computer system and unpredicted interruptions of system operation, (2) such a temporary interruption caused an increase of blood pressure and adrenaline excretion, (3) complaints of stress and strain were repotted mainly by data-entry staff, (4) data-entry groups displayed a higher level of physiological arousal during post-work hours than a control group, and (5) that a majority of those who worked continuously at a VOU reported physical discomfort within 1.5 hours. It is concluded that stress and strain in computerized work may be counteracted at the technological and the organizational level: by reducing the duration and frequency of breakdowns, by reducing response times in the system, and by eliminating pure data-entry tasks. 相似文献
160.
Marianne Lindström Maria Johansson Jan Herrmann Olle Johnsson 《Journal of Environmental Planning and Management》2006,49(4):495-513
Human actions towards land, freshwater and oceans have already caused biodiversity to decline. This study aims to investigate attitudes towards the conservation of biological biodiversity among different groups in a Swedish city, Kristianstad. An inquiry including statements measuring attitudes towards the conservation of habitats, animals and plants, to the biological diversity within selected local areas, to global and national areas, and to societal issues, was replied to by 271 persons. Deciduous forests, birds and wild flowers were given highest priority. An area categorized as wetland including lakeshore meadows with a rich bird life was prioritized as most important for conservation while a forest area was chosen as best for recreation. The experts gave lower priority to arable land, urban parks, domestic animals, agricultural and garden plants and to conifer forests compared to the other groups. Knowledge about what people in general value as important could facilitate the future planning of nature areas in the city of Kristianstad. 相似文献