全文获取类型
收费全文 | 103篇 |
免费 | 1篇 |
国内免费 | 1篇 |
专业分类
安全科学 | 1篇 |
废物处理 | 3篇 |
环保管理 | 7篇 |
综合类 | 23篇 |
基础理论 | 22篇 |
污染及防治 | 34篇 |
评价与监测 | 9篇 |
社会与环境 | 6篇 |
出版年
2022年 | 1篇 |
2021年 | 1篇 |
2020年 | 2篇 |
2017年 | 1篇 |
2015年 | 4篇 |
2014年 | 2篇 |
2013年 | 8篇 |
2012年 | 6篇 |
2011年 | 2篇 |
2010年 | 4篇 |
2009年 | 4篇 |
2008年 | 10篇 |
2007年 | 6篇 |
2006年 | 9篇 |
2005年 | 3篇 |
2004年 | 1篇 |
2003年 | 2篇 |
2002年 | 2篇 |
2001年 | 1篇 |
2000年 | 1篇 |
1999年 | 4篇 |
1998年 | 2篇 |
1997年 | 2篇 |
1996年 | 3篇 |
1995年 | 2篇 |
1994年 | 4篇 |
1993年 | 1篇 |
1991年 | 2篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1986年 | 2篇 |
1985年 | 1篇 |
1980年 | 2篇 |
1979年 | 2篇 |
1978年 | 1篇 |
1964年 | 3篇 |
1962年 | 1篇 |
排序方式: 共有105条查询结果,搜索用时 15 毫秒
101.
Sylke Ritter Werner H. Hauthal Gerd Maurer 《Environmental science and pollution research international》1995,2(3):153-160
Partition coefficients PO,w
(i) describing the distribution of a solute i onto coexisting phases of 1-octanol and water are needed in a large variety of
applications. They can be measured directly by HPLC as long as log PO,w
(i)≧ 3.5. For more hydrophobic substances, several experimental procedures have been proposed in the literature. The reliability
of those methods is questionable. Therefore, in the present work, PO,w
(i) is determined experimentally by three HPLC methods using reversed-phase HPLC [1]. Results from different procedures are compared
critically. The method of Braumann [2] proved to be superior over the OECD-guidelines [3]. It was therefore applied to determine
octanol/water partition coefficients for 23 substances at 25 °C. For eight of those substances (4-methylindole; 9-(hydroxymethyl)anthracene;
N-ethylcarbazol; ethylcyclohexane; trans-2-octene; l,l-dimethyl-(ethy])cyclohexane; heptylbenzene; 4-dodecyl-l,3-benzenediol)
no experimentally determined number for PO,w
(i) has been published before. 相似文献
102.
103.
Several household consumer products were analyzed for their content of perfluorooctanoate (PFOA), perfluorooctane sulfonate (PFOS), and fluorotelomer alcohols (FTOH) by nanoflow ultra performance liquid chromatography – mass spectrometry and gas chromatography – mass spectrometry. Among the investigated products, which are applied as sprays, were impregnating agents, cleaning agents, lubricants, and conditioners. In 14 of the 26 products analyzed, at least one polyfluorinated compound (PFC) was detected in 14 samples. 8?:?2 FTOH was the dominating PFC with concentrations up to 149?µg?mL?1. The maximum concentration of PFOA was 14.5?µg?mL?1, whereas PFOS was not detected in any sample. Investigated PFCs were mostly found in impregnating agents and lubricants, but were not detected in cleaning agents and conditioners. In FTOH-containing impregnating agents, similar ratios between 6?:?2 FTOH, 8?:?2 FTOH, and 10?:?2 FTOH were found. FTOH proportions in PFC-containing lubricants were similar as well. Total human exposure to PFC from consumer product aerosols for three different scenarios was estimated to be between 42.8 and 464?ng?kg?1?per day. 相似文献
104.
Gerd Leipold 《世界环境》2008,(4)
当前,高涨的粮食价格已经造成了全球粮食危机,全球贫困人口无法获得粮食供应。解决粮食危机,关键是要根本改变世界农业发展方向。以往,人们以为通过向大自然不断索取,就可以提高食物产量。为了消灭所 有昆虫,或为了耕种,人们在土地上施用大量农药,最终使土地变成“工厂”。而不再是食物生产地。农业产业化确实能够在几年内增加农作物产量,收成显著。 相似文献
105.
Determination of naturally occurring MTBE biodegradation by analysing metabolites and biodegradation by-products 总被引:1,自引:0,他引:1
Martienssen M Fabritius H Kukla S Balcke GU Hasselwander E Schirmer M 《Journal of contaminant hydrology》2006,87(1-2):37-53
Methyl tert-butyl ether (MTBE) is one of the main additives in gasoline. Its degradation is known to be difficult in natural environments. In this study, significant MTBE degradation is demonstrated at a contaminated site in Leuna (eastern Germany). Since the extent of the plume appeared to be constant over the last 5 years, an extended study was performed to elucidate the degradation processes. Special attention was paid to the production, accumulation and degradation of metabolites and by-products. Groundwater samples from 105 monitoring wells were used to measure 20 different substances. During the degradation process, several intermediates such as tert-butyl alcohol (TBA), tert-butyl formate, formate and lactate were produced. However, the potentially carcinogenic by-product methacrylate was not detected in several hundred samples. At the Leuna site, MTBE degradation occurred under microaerobic conditions. In contrast to hydrocarbons and BTEX, there was no evidence for anaerobic MTBE degradation. Among the degradation products, TBA was found to be a useful intermediate to identify MTBE degradation, at least under microaerobic conditions. TBA accumulation was strongly correlated to MTBE degradation according to the kinetic properties of both degradation processes. Since maximum degradation rates (v(max)) and k(m) values were higher for MTBE (v(max)=2.3 mg/l/d and k(m)=3.2 mg/l) than for TBA (v(max)=1.35 mg/l/d and k(m)=0.05 mg/l), TBA significantly accumulated as an intermediate by-product. The field results were supported by bench scale model aquifer experiments. 相似文献