全文获取类型
收费全文 | 1115篇 |
免费 | 18篇 |
国内免费 | 7篇 |
专业分类
安全科学 | 39篇 |
废物处理 | 43篇 |
环保管理 | 140篇 |
综合类 | 230篇 |
基础理论 | 235篇 |
环境理论 | 3篇 |
污染及防治 | 324篇 |
评价与监测 | 70篇 |
社会与环境 | 53篇 |
灾害及防治 | 3篇 |
出版年
2023年 | 11篇 |
2022年 | 16篇 |
2021年 | 23篇 |
2020年 | 16篇 |
2019年 | 15篇 |
2018年 | 39篇 |
2017年 | 40篇 |
2016年 | 44篇 |
2015年 | 36篇 |
2014年 | 42篇 |
2013年 | 61篇 |
2012年 | 49篇 |
2011年 | 78篇 |
2010年 | 59篇 |
2009年 | 61篇 |
2008年 | 71篇 |
2007年 | 69篇 |
2006年 | 38篇 |
2005年 | 55篇 |
2004年 | 30篇 |
2003年 | 36篇 |
2002年 | 34篇 |
2001年 | 19篇 |
2000年 | 15篇 |
1999年 | 10篇 |
1998年 | 16篇 |
1997年 | 5篇 |
1996年 | 11篇 |
1995年 | 19篇 |
1994年 | 11篇 |
1993年 | 7篇 |
1992年 | 12篇 |
1991年 | 6篇 |
1990年 | 6篇 |
1989年 | 7篇 |
1988年 | 6篇 |
1987年 | 6篇 |
1986年 | 8篇 |
1984年 | 4篇 |
1983年 | 4篇 |
1982年 | 3篇 |
1980年 | 3篇 |
1978年 | 3篇 |
1977年 | 3篇 |
1969年 | 2篇 |
1963年 | 2篇 |
1961年 | 2篇 |
1959年 | 3篇 |
1958年 | 3篇 |
1957年 | 2篇 |
排序方式: 共有1140条查询结果,搜索用时 62 毫秒
351.
Elemental concentrations in air, water, and aquatic biota in two rural provinces in northern Vietnam
The present study on environmental pollution in northern Vietnam investigates elemental concentrations in fine particulate matter (PM2.5), freshwater, and aquatic biota at two sites with differing levels of industrial activities. An Thin is situated 47 km east of Hanoi in the neighbourhood of a coal combustion power plant, whereas the reference site, Duy Minh, is situated in the agricultural province of Ha Nam, 40 km south of Hanoi. Elemental concentrations were analysed using energy-dispersive X-ray fluorescence, total reflection X-ray fluorescence, and graphite furnace atomic absorption spectro-metry. All investigated elements in fine particles (PM2.5) had significantly higher concentrations in An Thin, thus identifying the air at this site as polluted. In contrast to the aerosol samples, elemental concentrations as well as quantitative differences between the sampling sites were low in freshwater and biota, indicating that the impact of atmospheric deposition was limited. 相似文献
352.
353.
354.
355.
356.
357.
Jan Wauters Elvire Van Assche Aristidis Antsaklis James Tepperberg S. Michael Sharp Michael W. Kilpatrick Triantafyllos Tafas Petros Tsipouras 《黑龙江环境通报》2007,27(10):951-955
Objective Fluorescence in situ hybridization (FISH) analysis has become a valuable adjunct in cytogenetics, providing a rapid screen for common chromosome abnormalities that is particularly helpful in prenatal diagnosis. FISH analysis using standard microscopy is expensive and labor intensive, requiring both a high skill level and subjective signal interpretation. A reliable fully automated system for FISH analysis could improve laboratory efficiency and potentially reduce errors and costs. Methods The efficacy of an automated system was compared to standard manual FISH analysis. Two sets of slides were generated from each of 152 amniotic fluid samples. Following hybridization with a standard panel of five chromosome FISH probes, one set of slides was evaluated using manual microscopy. The other set was evaluated using an automated microscopy system. Results A diagnostic outcome was obtained for all 152 samples using manual microscopy and for 146 of 152 (96%) samples using automated microscopy. Three cases of aneuploidy were detected. For those samples for which a diagnostic outcome was determined by both manual and automated microscopy, 100% concordance was observed. All FISH analysis results were confirmed by karyotype. Conclusion These data suggest that an automated microscopy system is capable of providing accurate and rapid enumeration of FISH signals in amniocytes. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
358.
Brigitte Simon-Bouy Agnès Taillandier Delphine Fauvert Isabelle Brun-Heath Jean-Louis Serre Carmen G. Armengod Martin G. Bialer Michèle Mathieu Jacques Cousin David Chitayat Jan Liebelt Barbara Feldman Marion Gérard-Blanluet Stefani Körtge-Jung Cath King Hannele Laivuori Martine Le Merrer Sarju Mehta Christina Jern Saba Sharif Fabienne Prieur Gabriele Gillessen-Kaesbach Andreas Zankl Etienne Mornet 《黑龙江环境通报》2008,28(11):993-998
359.
František Vožeh Antonín Doněk Jan Cendelín Ivana Korelusová Jan Vrba 《The Environmentalist》2007,27(4):501-504
The effect of long-term exposure to high frequency electromagnetic field (HF EMF) on some somatic and neural characteristics
was studied in neurodefective Lurcher mutant (+/Lc) and normal wild type mice (+/+). Both newborn and young adult (3 months)
animals derived from two strains (C3H, B6CBA) were exposed to HF EMF (870 MHz) from 1st to 21st day or from 91st to 120th
day respectively. In animals of both groups and controls we observed the development of body weight. Moreover, in the HF EMF
exposed adult B6CBA animals we studied spatial learning ability, motor functions and the CNS excitability. To investigate
specific energy absorption rate (SAR) in experimental animals we have done the basic 3D calculations of the electromagnetic
energy distribution in the simplified model of the mouse. The HF EMF exposed animals exhibited mild differences of body weight
between them and unexposed controls. The long-term exposure to HF EMF did not significantly influence the ability to learn
in the Morris water maze. However, significant lower swimming speed was found in the irradiated +/Lc as well as lower motor
activity of +/+ in the open field when compared to controls. No significant differences were found between HF EMF irradiated
animals and controls in examination of the CNS excitability and motor functions. 相似文献