全文获取类型
收费全文 | 1933篇 |
免费 | 50篇 |
国内免费 | 337篇 |
专业分类
安全科学 | 87篇 |
废物处理 | 117篇 |
环保管理 | 122篇 |
综合类 | 681篇 |
基础理论 | 374篇 |
污染及防治 | 640篇 |
评价与监测 | 147篇 |
社会与环境 | 86篇 |
灾害及防治 | 66篇 |
出版年
2023年 | 27篇 |
2022年 | 81篇 |
2021年 | 73篇 |
2020年 | 43篇 |
2019年 | 45篇 |
2018年 | 73篇 |
2017年 | 71篇 |
2016年 | 91篇 |
2015年 | 89篇 |
2014年 | 142篇 |
2013年 | 211篇 |
2012年 | 158篇 |
2011年 | 163篇 |
2010年 | 120篇 |
2009年 | 103篇 |
2008年 | 117篇 |
2007年 | 111篇 |
2006年 | 100篇 |
2005年 | 60篇 |
2004年 | 43篇 |
2003年 | 45篇 |
2002年 | 44篇 |
2001年 | 32篇 |
2000年 | 27篇 |
1999年 | 22篇 |
1998年 | 25篇 |
1997年 | 23篇 |
1996年 | 20篇 |
1995年 | 19篇 |
1994年 | 12篇 |
1993年 | 15篇 |
1992年 | 9篇 |
1991年 | 9篇 |
1990年 | 6篇 |
1989年 | 4篇 |
1988年 | 3篇 |
1987年 | 7篇 |
1982年 | 6篇 |
1971年 | 2篇 |
1970年 | 2篇 |
1967年 | 3篇 |
1965年 | 2篇 |
1964年 | 4篇 |
1961年 | 3篇 |
1960年 | 4篇 |
1959年 | 6篇 |
1958年 | 12篇 |
1957年 | 5篇 |
1956年 | 7篇 |
1955年 | 2篇 |
排序方式: 共有2320条查询结果,搜索用时 93 毫秒
221.
Investigative monitoring within the European Water Framework Directive: a coastal blast furnace slag disposal, as an example 总被引:1,自引:0,他引:1
Borja A Tueros I Belzunce MJ Galparsoro I Garmendia JM Revilla M Solaun O Valencia V 《Journal of environmental monitoring : JEM》2008,10(4):453-462
The European Water Framework Directive (WFD) establishes a framework for the protection of estuarine and coastal waters, with the most important objective being to achieve 'good ecological status' for all waters, by 2015. Hence, Member States are establishing programmes for the monitoring of water quality status, through the assessment of ecological and chemical elements. These monitoring programmes can be of three types: surveillance monitoring; operational monitoring (both undertaken on a routine basis); and investigative monitoring (carried out where the reason of any exceedance for ecological and chemical status is unknown). Until now, nothing has been developed in relation to investigative monitoring and no clear guidance exists for this type of monitoring, as it must be tackled on a 'case-by-case' basis. Consequently, the present study uses slag disposal from a blast furnace, into a coastal area, as a case-study in the implementation of investigative monitoring, according to the WFD.In order to investigate the potential threat of such slags, this contribution includes: a geophysical study, to determine the extent of the disposal area; sediment analysis; a chemical metal analysis; and an ecotoxicological study (including a Microtox test and an amphipod bioassay). The results show that metal concentrations are several times above the background concentration. However, only one of the stations showed toxicity after acute toxicological tests, with the benthic communities being in a good status. The approaches used here show that contaminants are not bioavailable and that no management actions are required with the slags. 相似文献
222.
Vít Matějů Simona Vosáhlová Robin Kyclt Tomáš Janoch Gabriela Šedivcová 《Environmental monitoring and assessment》2014,186(2):711-718
Soil-dwelling annelids of the genus Enchytraeus are used in ecotoxicology for testing of chemicals mixed in artificial soil or for testing of wastes and soils of unknown quality. ISO 16387 describes a method for determining the effects of substances or contaminated soils on survival and reproduction of Enchytraeus albidus or of the smaller species Enchytraeus buchholzi or Enchy-traeus crypticus. After the total test duration of 6 (or 4)?weeks, the juveniles hatched in the meantime are counted. There are several possible extraction techniques, which are always followed by counting the juveniles by hand, but none of them seems easy to handle. We proposed a new modification of the worm extraction method using flotation of fixed and stained juveniles followed by taking a photograph. The digital image of the juveniles is evaluated by computer processing. It makes the counting of juveniles much easier and less labor intensive. 相似文献
223.
Ivana Potočnik Jelena Vukojević Mirjana Stajić Emil Rekanović Svetlana Milijašević Biljana Todorović 《Journal of environmental science and health. Part. B》2013,48(4):365-370
Twenty microfungal isolates were collected from diseased fruiting bodies of Agaricus bisporus sampled from Serbian mushroom farms during 2003–2007. Based on morphological characteristics and pathogenicity tests, the isolates were identified as Cladobotryum dendroides. The isolates of C. dendroides and A. bisporusF56 and U3 were tested for sensitivity to several selected fungicides in vitro. C. dendroides isolates were found to be more sensitive to prochloraz manganese and flusilazole + carbendazim than to the other fungicides tested (EC50 values were 0.09 and 0.11 mg L? 1, respectively) and weakly resistant to thiophanate-methyl (EC50 values ranged between 6.53 and 12.09 mg L? 1). Selectivity indexes of the tested fungicides on both C. dendroidesand A. bisporusindicated that thiophanate-methyl, cyproconazole + carbendazim and flusilazole + carbendazim had much less selective fungitoxicity than benomyl, carbendazim and prochloraz manganese. 相似文献
224.
225.
Alexander V. Ereskovsky Maude Dubois Julijana Ivanišević Eve Gazave Pascal Lapebie Daria Tokina Thierry Pérez 《Marine Biology》2013,160(2):423-438
This study presents the phenology of two common Mediterranean sponges belonging to the genus Oscarella (Porifera, Homoscleromorpha). Oscarella tuberculata and Oscarella lobularis are two sibling species, dwellers of shallow benthic communities which tend to have distinct ecological behavior, respectively, euryecious and rather stenoecious. The comparative study of their reproductive cycle showed that both Oscarella species have a seasonal reproductive cycle with a successive phase duration differing from one species to another. In both species, there is a continuous oogenesis, with new oocytes appearing in spring, whereas the spermatogenesis generally starts later with the early warming of the sea. The embryonic development and the larval release are restricted to the warmest months of the year. We also observed a shift in the period of gametogenesis and larval emission depending on species and differences in their sensitivity to changes in thermal regime. It appears that an increase in seawater temperature can affect sex determination, with mainly a shift toward males in both species. Their reproductive efforts are variable in time, and can be in some cases influenced by the temperature regime. This is especially the case of O. lobularis which seems to be the most thermosensitive, its phenology responding significantly to changes in thermal regime, whereas O. tuberculata seems to be less sensitive and/or reactive. By detecting phenological changes among sponges, this study demonstrated the relevance of such monitoring to assess the possible biological response to climate change. 相似文献
226.
227.
Dejana Kosanović Jelena Vukojević Mirjana Stajić Emil Rekanović Miloš Stepanović 《Journal of environmental science and health. Part. B》2013,48(8):607-613
Trichoderma species, the causal agents of green mould disease, induce great losses in Agaricus bisporus farms. Fungicides are widely used to control mushroom diseases although green mould control is encumbered with difficulties. The aims of this study were, therefore, to research in vitro toxicity of several commercial fungicides to Trichoderma isolates originating from Serbian and Bosnia-Herzegovina farms, and to evaluate the effects of pH and light on their growth. The majority of isolates demonstrated optimal growth at pH 5.0, and the rest at pH 6.0. A few isolates also grew well at pH 7. The weakest mycelial growth was noted at pH 8.0–9.0. Generally, light had an inhibitory effect on the growth of tested isolates. The isolates showed the highest susceptibility to chlorothalonil and carbendazim (ED50 less than 1 mg L?1), and were less sensitive to iprodione (ED50 ranged 0.84–6.72 mg L?1), weakly resistant to thiophanate-methyl (ED50 = 3.75–24.13 mg L?1), and resistant to trifloxystrobin (ED50 = 10.25–178.23 mg L?1). Considering the toxicity of fungicides to A. bisporus, carbendazim showed the best selective toxicity (0.02), iprodione and chlorothalonil moderate (0.16), and thiophanate-methyl the lowest (1.24), while trifloxystrobin toxicity to A. bisporus was not tested because of its inefficiency against Trichoderma isolates. 相似文献
228.
229.
ABSTRACT: Flash flooding is the rapid flooding of low lying areas caused by the stormwater of intense rainfall associated with thunderstorms. Flash flooding occurs in many urban areas with relatively flat terrain and can result in severe property damage as well as the loss of lives. In this paper, an integrated one‐dimensional (1‐D) and two‐dimensional (2‐D) hydraulic simulation model has been established to simulate stormwater flooding processes in urban areas. With rainfall input, the model simulates 2‐D overland flow and 1‐D flow in underground stormwater pipes and drainage channels. Drainage channels are treated as special flow paths and arranged along one or more sides of a 2‐D computational grid. By using irregular computation grids, the model simulates unsteady flooding and drying processes over urban areas with complex drainage systems. The model results can provide spatial flood risk information (e.g., water depth, inundation time and flow velocity during flooding). The model was applied to the City of Beaumont, Texas, and validated with the recorded rainfall and runoff data from Tropical Storm Allison with good agreement. 相似文献
230.