全文获取类型
收费全文 | 463篇 |
免费 | 9篇 |
国内免费 | 5篇 |
专业分类
安全科学 | 7篇 |
废物处理 | 28篇 |
环保管理 | 62篇 |
综合类 | 44篇 |
基础理论 | 106篇 |
环境理论 | 2篇 |
污染及防治 | 161篇 |
评价与监测 | 40篇 |
社会与环境 | 23篇 |
灾害及防治 | 4篇 |
出版年
2023年 | 5篇 |
2022年 | 11篇 |
2021年 | 14篇 |
2020年 | 1篇 |
2019年 | 17篇 |
2018年 | 20篇 |
2017年 | 16篇 |
2016年 | 22篇 |
2015年 | 13篇 |
2014年 | 18篇 |
2013年 | 48篇 |
2012年 | 28篇 |
2011年 | 42篇 |
2010年 | 21篇 |
2009年 | 33篇 |
2008年 | 36篇 |
2007年 | 20篇 |
2006年 | 15篇 |
2005年 | 20篇 |
2004年 | 14篇 |
2003年 | 13篇 |
2002年 | 9篇 |
2001年 | 3篇 |
2000年 | 5篇 |
1999年 | 2篇 |
1998年 | 5篇 |
1997年 | 1篇 |
1996年 | 2篇 |
1995年 | 7篇 |
1994年 | 4篇 |
1993年 | 2篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1989年 | 1篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1969年 | 1篇 |
排序方式: 共有477条查询结果,搜索用时 15 毫秒
451.
This study was carried out in male Wistar rats to determine the potential effects of chlorpyrifos (CHP) on oxidative stress, as was reported for organophosphorus (OP) pesticides. Following an acute, daily 3- or 14-day exposure with CHP at doses of 2.5, 5, or 25 mg kg?1 data showed significant increases in malondialdehyde levels at both exposure durations and at all doses, except for 2.5 mg kg?1, in hepatic and aorta, kidney, and plasma samples. The nitrites (NO) showed elevation at 25 mg kg?1 in aorta, at 3- and 14-day exposure, in hepatic tissue with all doses at 3-day exposure, but not at 14-day with a 5 mg kg?1 dose. In plasma, increases occurred only at 25 mg kg?1 at both exposure times, and in kidney at all doses and both exposure durations. Superoxide dismutase (SOD) enzyme activity in the aorta sample was statistically significant at all doses at 3 days and at 14 days, except at 2.5 mg kg?1; and in hepatic tissue only at 25 mg kg?1 dose at both durations. In plasma SOD activity was elevated at all doses at 3 days, but at 14 days only at 25 mg kg?1. Data suggests that oxidative stress may be involved in the effects of CHP on rats. 相似文献
452.
Pilar Castellanos Manuel M. Reglero Milagros C. Esteso María R. Fernández-Santos José J. Garde 《毒物与环境化学》2013,95(6):1163-1175
The sperm quality and several parameters associated with oxidative stress were evaluated in ram (Ovis aries) spermatozoa suspensions incubated with 0, 50 or 500 ng/mL Pb during 0, 1, 3 or 6 h. The presence of Pb during incubation, reduced the integrity of the acrosome, % sperm motility and integrity, and the functionality of membrane. On the contrary, % polyunsaturated fatty acids and the activities of glutathione peroxidase and superoxide dismutase in the spermatozoa suspensions were not affected by Pb. Moreover, glutathione peroxidase activity was decreased and the fatty acid composition changed due to the relative increase in % stearic acid during the incubation time independently on Pb presence. Data showed that several effects of Pb on sperm quality usually observed in vivo also occurred in vitro, but without any relationship with oxidative stress biomarkers. 相似文献
453.
César Megina Manuel M. González-Duarte Pablo J. López-González Stefano Piraino 《Marine Biology》2013,160(2):371-381
Sessile hydrozoans constitute a common component of marine rocky communities. We compared the hydrozoan assemblages occurring on sea-walls of commercial harbours with those on natural rocky cliffs along the southern Iberian Peninsula, to identify differences in the multivariate structure of the assemblages and species richness. Harbour hydroid assemblages significantly differed from natural ones mainly due to their qualitative composition. Medusa-less taxa, optimized for low dispersal and long-term persistence on the substratum, are barely represented in harbours, but abundant at natural sites. “Port species” assemblages were composed of (1) small, short-living species with typical opportunistic characteristics; (2) cosmopolitan large-size taxa, significantly represented both in harbours and in natural habitats; (3) non-indigenous species. Contrarily to the expected lower richness of communities in confined areas, our results demonstrate that richness of hydroid assemblages in harbours is comparable to that of natural habitats. 相似文献
454.
It is predicted that climate change will drive extinctions of some reptiles and that the number of these extinctions will depend on whether reptiles are able to change their distribution. Whether the latitudinal distribution of reptiles may change in response to increases in temperature is unknown. We used data on reptile distributions collected during the 20th century to analyze whether changes in the distributions of reptiles in Spain are associated with increases in temperature. We controlled for biases in sampling effort and found a mean, statistically significant, northward shift of the northern extent of reptile distributions of about 15.2 km from 1940-1975 to 1991-2005. The southern extent of the distributions did not change significantly. Thus, our results suggest that the latitudinal distributions of reptiles may be changing in response to climate change. 相似文献
455.
Oller-Ruiz Ainhoa Garrido Isabel Viñas Pilar Campillo Natalia Fenoll José Hernández-Córdoba Manuel 《Environmental Chemistry Letters》2018,16(3):1077-1082
Environmental Chemistry Letters - There is no previous work on the determination of chlorophenoxy acid herbicides in soils. Here we analysed six chlorophenoxy acid herbicides using magnetic solid... 相似文献
456.
A ‘coastal-hazard GIS’ for Sri Lanka 总被引:1,自引:1,他引:0
Jean-François Desprats Manuel Garcin Nishanta Attanayake Rodrigo Pedreros Cheer Siriwardana Mélanie Fontaine Starin Fernando Udaya De Silva 《Journal of Coastal Conservation》2010,14(1):21-31
Following the 2004 tsunami disaster in Sri Lanka, it was apparent that mapping the coast’s vulnerability was essential for
future protection of the local populations. We therefore developed a prototype ‘Coastal-hazard GIS’ for Sri Lanka so as to
provide an effective tool for decision makers to limit the impact of natural coastal hazards such as sea level rise, tsunamis,
storm surges and coastal erosion, and thus protect the exposed assets (population, property, settlements, communications networks,
etc.). The prototype was developed on a pilot site in Galle through building up homogeneous data on the land/sea interface
from studies conducted on the exposure of the coastal populations, the aim being to enable an evaluation of the hazards combined
with the vulnerability and thus an analysis of the risks. Coastal risk scenarios are developed so as to estimate the impacts
and consequences of an event (tsunami, storm, etc.) on the assets, the principle behind this being that if, in general, the
coastal hazard cannot be decreased, then a better knowledge of it through simulation should make it possible to limit the
vulnerability and thus the risk. The Coastal-hazard GIS will also provide a planning tool in terms of locating new settlements,
expanding urban areas, siting coastal protection works, etc. 相似文献
457.
The sequential extraction procedures described by Tessier et al., McGrath and Cegarra, and Gimeno-García et al. were compared
to investigate trace element (As, Cr, Cu, Pb, and Zn) partitioning patterns and extraction efficiency in three contaminated
soils from Mediterranean regions of Spain. Soils were selected from Onda (Castellón) (S1), Aznalcóllar (Sevilla) (S2), and
Silla (Valencia) (S3). S1 was a soil contaminated with Pb and Zn after dumping of wastes from the manufacture of ceramic tiles,
S2 was polluted accidentally with a highly acid and As-concentrated sludge from mining activities, and S3 was a soil with
a high Cr content from tannery sludge disposal. Trace element distribution in the soils—soluble, exchangeable, organically
bound, precipitated with carbonates, bound to iron and manganese oxides, and precipitated with sulfides fractions—varied significantly
according to the extraction procedure used. In addition, different extraction efficiencies were found for the three sequential
extraction procedures compared. Finally, the trace elements studied showed different and specific distribution patterns between
the various soil fractions examined. 相似文献
458.
A microcosm test for potential mineralization of chlorinated compounds under coupled aerobic/anaerobic conditions 总被引:3,自引:0,他引:3
In this study, the feasibility of using a mineralization test under coupled aerobic/anaerobic conditions was demonstrated. The coupling of anaerobic methanogenic and aerobic methanotrophic conditions in a microcosm required the presence of both a carbon source for anaerobic metabolism and oxygen for aerobic metabolism. These requirements were fulfilled by using a slow hydrolyzing organic matter along with intermittent addition of oxygen to the bottle headspace. Perchloroethylene (PCE) mineralization tests confirmed the effectiveness of the proposed methodology as well as PCE mineralization under coupled conditions. 相似文献
459.
Howard BJ Beresford NA Nisbet A Cox G Oughton DH Hunt J Alvarez B Andersson KG Liland A Voigt G 《Journal of environmental radioactivity》2005,83(3):275-295
The STRATEGY project (Sustainable Restoration and Long-Term Management of Contaminated Rural, Urban and Industrial Ecosystems) aimed to provide a holistic decision framework for the selection of optimal restoration strategies for the long-term sustainable management of contaminated areas in Western Europe. A critical evaluation was carried out of countermeasures and waste disposal options, from which compendia of state-of-the-art restoration methods were compiled. A decision support system capable of optimising spatially varying restoration strategies, that considered the level of averted dose, costs (including those of waste disposal) and environmental side effects was developed. Appropriate methods of estimating indirect costs associated with side effects and of communicating with stakeholders were identified. The importance of stakeholder consultation at a local level and of ensuring that any response is site and scenario specific were emphasised. A value matrix approach was suggested as a method of addressing social and ethical issues within the decision-making process, and was designed to be compatible with both the countermeasure compendia and the decision support system. The applicability and usefulness of STRATEGY outputs for food production systems in the medium to long term is assessed. 相似文献
460.