全文获取类型
收费全文 | 223篇 |
免费 | 1篇 |
专业分类
安全科学 | 4篇 |
废物处理 | 6篇 |
环保管理 | 12篇 |
综合类 | 82篇 |
基础理论 | 53篇 |
污染及防治 | 43篇 |
评价与监测 | 16篇 |
社会与环境 | 8篇 |
出版年
2022年 | 2篇 |
2019年 | 2篇 |
2018年 | 3篇 |
2017年 | 6篇 |
2016年 | 3篇 |
2015年 | 5篇 |
2014年 | 7篇 |
2013年 | 12篇 |
2012年 | 9篇 |
2011年 | 11篇 |
2010年 | 11篇 |
2009年 | 9篇 |
2008年 | 4篇 |
2007年 | 3篇 |
2006年 | 8篇 |
2005年 | 9篇 |
2004年 | 8篇 |
2003年 | 9篇 |
2002年 | 9篇 |
2001年 | 3篇 |
2000年 | 4篇 |
1999年 | 3篇 |
1998年 | 2篇 |
1997年 | 5篇 |
1996年 | 3篇 |
1995年 | 3篇 |
1994年 | 5篇 |
1987年 | 3篇 |
1984年 | 2篇 |
1969年 | 2篇 |
1965年 | 1篇 |
1964年 | 4篇 |
1963年 | 3篇 |
1962年 | 1篇 |
1961年 | 2篇 |
1960年 | 2篇 |
1959年 | 3篇 |
1958年 | 3篇 |
1957年 | 5篇 |
1956年 | 1篇 |
1955年 | 3篇 |
1954年 | 4篇 |
1953年 | 1篇 |
1952年 | 2篇 |
1950年 | 1篇 |
1946年 | 1篇 |
1941年 | 1篇 |
1934年 | 3篇 |
1932年 | 2篇 |
1922年 | 1篇 |
排序方式: 共有224条查询结果,搜索用时 15 毫秒
91.
Marco Munari Joachim Sturve Matthew B. Sanders Paul Christian Marco Nigro 《Chemistry and Ecology》2014,30(8):719-725
The use of functionalised metal sulphide nanoparticles (NPs) for nanoremediation and biomedical application is rapidly increasing, which could lead to significant inputs into the marine environment. The potential impact of some NPs on marine organisms is still poorly understood. In the present paper the genotoxic potential of Ag2S and CdS NPs on Mytilus edulis haemocytes was assessed. MPEG-SH (thiol-terminated methyl polyethylene glycol), was used as capping agent to avoid NPs agglomeration. TEM analysis showed that the Ag2S NPs size was 13±7 nm, whereas CdS quantum dots had an average diameter of 4±1 nm. DNA integrity was evaluated by Comet assay following exposure to increasing concentration series (0.01–10 mg/L). Both silver and cadmium NPs showed genotoxic effects at the highest dose. MPEG-SH was also found to exert a weak genotoxic activity, suggesting that at least part of the genotoxic potential of functionalised NPs on mussel cells might be attributable to the capping agent. These results confirm the genotoxic potential of Ag2S NPs for mussel cells and demonstrated, for the first time, that CdS NPs is genotoxic in a marine organism. 相似文献
92.
Antibiotics of inorganic and organic origin in pig manure can inhibit the anaerobic process in biogas plants. The influence of three frequently used antibiotics, copper dosed as CuSO4, sulfadiazine (SDZ), and difloxacin (DIF), on the anaerobic digestion process of pig manure was studied in semi-continuous experiments. Biogas production recovered after every Cu dosage up to a sum of 12.94 g Cu kg−1 organic dry matter (ODM), probably due to Cu precipitation following the formation of sulphide from sulphate. Complete inhibition was found at the very high Cu concentration of 19.40 g Cu kg−1 ODM. Inhibitory effect of SDZ and DIF was observed at concentrations as high as 2.70 g kg−1 ODM and 0.54 g kg−1 ODM, respectively. It seems very unlikely that the antibiotics tested would inhibit the anaerobic process in a full-scale biogas plant. 相似文献
93.
Joachim Maes Jo Vliegen Karen Van de Vel Stijn Janssen Felix Deutsch Koen De Ridder Clemens Mensink 《Atmospheric environment (Oxford, England : 1994)》2009,43(6):1246-1254
CORINAIR atmospheric emission inventories are frequently used input data for air quality models with a domain situated in Europe. In CORINAIR emission inventories, sources are broken down over 11 major source categories. This paper presents spatial surrogates for the disaggregation of CORINAIR atmospheric emission inventories for input of air pollutants and particulate matter to grid or polygon based air quality model domains inside Europe. The basis for the disaggregation model was the CLC2000 land cover data to which statistical weights were added. Weights were population census data for residential emissions, employment statistics for agricultural and industrial area emissions, livestock statistics for ammonia emissions and annual aircraft movements for emissions realized by air transport. Additional road and off-road network information was used to disaggregate emissions realized by traffic. A comparison of top down produced emission estimates with spatially resolved national emission data for The Netherlands and the United Kingdom gave confidence in the present spatial surrogates as a tool for the top down production of atmospheric emission maps. Explained variance at a spatial resolution of 5 km was >70% for CO, NMVOC and NOx, >60% for PM10 and almost 50% for SO2. 相似文献
94.
Lynch Amanda H. Griggs David Joachim Lee Salminen Ed Heider Chris Kestin Tahl Zhu Xuan Veland Siri 《Regional Environmental Change》2017,17(3):767-776
Regional Environmental Change - Geographic information systems are a means to develop a common framework for the integration of a range of perspectives into natural resources management decisions.... 相似文献
95.
The influence of individual cuticular hydrocarbons on nestmate recognition in the European hornet, Vespa crabro L., was investigated. We observed the behavioural response of workers towards differently treated dead conspecifics in a bioassay. Dummies were extracted with dichloromethane and extracts were spiked with microgram amounts of synthetic hydrocarbons naturally occurring on the cuticle of V. crabro. These modified extracts were reapplied to extracted workers that were subsequently tested in the bioassay. Non-spiked nestmate dummies (negative control) and untreated non-nestmate dummies (positive control) were tested in control experiments. The addition of only heneicosane or a mixture of heneicosane, tricosane, and (Z)-9-tricosene to the extracts led to a significant increase of agonistic behaviour in workers leaving the nest for foraging flights. Returning workers reacted much less aggressively than those leaving. This is one of the first behavioural proofs that manipulation of cuticular hydrocarbon profiles can be perceived by a social insect species. The results support the hypothesis that colony-specific cuticular hydrocarbon profiles are involved in the phenomenon of nestmate recognition among social insects. 相似文献
96.
在557块针叶林分中进行调查,以图了解欧洲越桔(Vacciniummyrtillus)、越桔(V.vitis-idaea)和曲芒发草(Deschampsiaflexuosa)与氮沉积率的相互联系.欧洲越桔在高氮地区比在低氮地区发生频度、丰富度都较少并且易感染叶部病原(Valdensiaheterodoxa),越桔的发生与氮沉积的增加呈明显的负相关,曲芒发草却没有这种趋势.在高氮沉积地区,欧洲越桔在优势种为欧洲赤松的林分中比在挪威云杉为优势种的林分中更为最普遍.在氮沉积较低水平的地区不是这种情形.调查的情况与增施氮素实验的结果一致,氮沉积对植被显示了巨大的效应.数据表明即使是较低的氮沉积也可能减少针叶林分林下植被最优势种的丰富度. 相似文献
97.
98.
51 Greek, Roman and Renaissance marble busts from the Antiquarium of the Residenz in Munich were studied for their C- and O-isotopic composition. Apart from some overlapping values, this technique permits — contrary to microscopic and chemical methods — localization of different Turkish, Greek and Italian marble deposits. 相似文献
99.
100.
The Science of Nature - 相似文献