全文获取类型
收费全文 | 663篇 |
免费 | 10篇 |
国内免费 | 5篇 |
专业分类
安全科学 | 37篇 |
废物处理 | 31篇 |
环保管理 | 103篇 |
综合类 | 97篇 |
基础理论 | 147篇 |
污染及防治 | 181篇 |
评价与监测 | 49篇 |
社会与环境 | 27篇 |
灾害及防治 | 6篇 |
出版年
2023年 | 5篇 |
2022年 | 4篇 |
2021年 | 12篇 |
2020年 | 3篇 |
2019年 | 8篇 |
2018年 | 12篇 |
2017年 | 21篇 |
2016年 | 15篇 |
2015年 | 23篇 |
2014年 | 25篇 |
2013年 | 50篇 |
2012年 | 25篇 |
2011年 | 40篇 |
2010年 | 28篇 |
2009年 | 31篇 |
2008年 | 35篇 |
2007年 | 43篇 |
2006年 | 40篇 |
2005年 | 30篇 |
2004年 | 23篇 |
2003年 | 24篇 |
2002年 | 24篇 |
2001年 | 10篇 |
2000年 | 20篇 |
1999年 | 8篇 |
1998年 | 5篇 |
1997年 | 4篇 |
1996年 | 7篇 |
1995年 | 10篇 |
1994年 | 9篇 |
1993年 | 14篇 |
1992年 | 5篇 |
1991年 | 4篇 |
1990年 | 4篇 |
1989年 | 3篇 |
1988年 | 6篇 |
1987年 | 2篇 |
1985年 | 2篇 |
1984年 | 9篇 |
1983年 | 7篇 |
1982年 | 5篇 |
1981年 | 2篇 |
1978年 | 3篇 |
1977年 | 2篇 |
1961年 | 2篇 |
1959年 | 2篇 |
1958年 | 1篇 |
1957年 | 2篇 |
1953年 | 1篇 |
1935年 | 1篇 |
排序方式: 共有678条查询结果,搜索用时 31 毫秒
61.
62.
Barbara Zielinska Eric Fujita John Sagebiel Greg Harshfield Ewa Uberna Terry Hayes 《Journal of the Air & Waste Management Association (1995)》2013,63(11):1038-1050
ABSTRACT In order to evaluate the existing risk to public health in Arizona related to hazardous air pollution, ambient air monitoring for selected hazardous air pollutants (HAPs) was carried out in 1994-1996 in several representative urban and rural areas of Arizona. A wide range of organic HAPs was monitored, requiring a variety of sampling and analysis methods. Stainless steel SUMMA canisters were used for collection of volatile hydrocarbons and halocarbons, which were analyzed by capillary gas chromatography with flame ionization and electron capture detection (GC-FID/ECD). Carbonyl compounds were collected using 2,4-dinitrophenylhydrazine-impregnated cartridges and analyzed by high performance liquid chromatog-raphy with ultraviolet detection. Semi-volatile and non-volatile polycyclic aromatic compounds were collected using a sampling train consisting of a filter followed by a PUF/XAD-4/PUF sandwich cartridge. Following extraction, samples were analyzed by capillary GC with mass spectrometric detection (GC-MS). Database software was developed for data processing and reporting functions. This paper describes the sampling strategy and the sampling and analysis methods employed in the monitoring program and presents a summary of all the results obtained during the duration of the sampling program. 相似文献
63.
64.
65.
66.
67.
68.
Field and microcosm observations of methanogenic phenolic compound degradation indicate that Monod kinetics governs the substrate disappearance but overestimates the observed biomass. In this paper we present modeling results from an ongoing multidisciplinary study of methanogenic biodegradation of phenolic compounds in a sand and gravel aquifer contaminated by chemicals and wastes used in wood treatment. Field disappearance rates of four phenols match those determined in batch microcosm studies previously performed by E.M. Godsy and coworkers. The degradation process appears to be at steady-state because even after a sustained influx over several decades, the contaminants still are disappearing in transport downgradient. The existence of a steady-state degradation profile of each substrate together with a low biomass density in the aquifer indicate that the bacteria population is exhibiting no net growth. This may be due to the oligotrophic nature of the biomass population in which utilization and growth are approximately independent of concentration for most of the concentration range. Thus a constant growth rate should exist over much of the contaminated area which may in turn be balanced by an unusually high decay or maintenance rate due to hostile conditions or predation. 相似文献
69.
Barbara Moghissi 《Environment international》1984,10(3):XVII-XIX
70.