全文获取类型
收费全文 | 232篇 |
免费 | 6篇 |
国内免费 | 13篇 |
专业分类
安全科学 | 9篇 |
废物处理 | 5篇 |
环保管理 | 24篇 |
综合类 | 80篇 |
基础理论 | 29篇 |
污染及防治 | 81篇 |
评价与监测 | 12篇 |
社会与环境 | 11篇 |
出版年
2023年 | 4篇 |
2022年 | 4篇 |
2021年 | 5篇 |
2020年 | 5篇 |
2019年 | 4篇 |
2018年 | 3篇 |
2017年 | 3篇 |
2016年 | 8篇 |
2015年 | 10篇 |
2014年 | 12篇 |
2013年 | 21篇 |
2012年 | 11篇 |
2011年 | 15篇 |
2010年 | 13篇 |
2009年 | 19篇 |
2008年 | 15篇 |
2007年 | 17篇 |
2006年 | 13篇 |
2005年 | 9篇 |
2004年 | 10篇 |
2003年 | 14篇 |
2002年 | 8篇 |
2001年 | 5篇 |
2000年 | 5篇 |
1999年 | 4篇 |
1998年 | 1篇 |
1994年 | 2篇 |
1992年 | 3篇 |
1987年 | 1篇 |
1985年 | 1篇 |
1982年 | 2篇 |
1977年 | 1篇 |
1973年 | 1篇 |
1961年 | 1篇 |
1959年 | 1篇 |
排序方式: 共有251条查询结果,搜索用时 31 毫秒
11.
12.
Summary. We investigated the hypothesis that aggregation signals produced by male webbing clothes moths (WCM), Tineola bisselliella (Hum.) (Lepidoptera: Tineidae), and close-range male attractant signals produced by females have a pheromonal basis, at least
in part. Gas chromatographic-electroantennographic detection (GC-EAD) and GC-mass spectrometric analyses of bioactive methanolic
extracts of male WCM disclosed three candidate pheromone components: hexadecanoic acid methyl ester (16:Ester), (Z)-9-hexadecenoic acid methyl ester (Z9—16:Ester), and octadecanoic acid methyl ester (18:Ester). In bioassay experiments in a large Plexiglas™ arena, a blend of
synthetic 16:Ester plus Z9—16:Ester was attractive to male and virgin (but not mated) female WCM; the 18:Ester was inactive.
GC-EAD analyses of pheromone gland extracts from female WCM revealed (E,Z)-2,13-octadecadienal (E2Z13—18:Ald) and (E,Z)-2,13-octadecadienol (E2Z13—18:OH) as candidate sex pheromone components. In arena bioassay experiments, 1—5 female equivalents of synthetic E2Z13—18:Ald (0.2 ng) and E2Z13—18:OH (0.1 ng) were more attractive to male WCM than were two virgin female WCM. We anticipate that the combination of
aggregation and sex pheromones, male-produced sonic aggregation signals, and habitat-derived semiochemicals will be highly
effective in attracting male and female WCM to commercial traps.
Received 12 January 2001; accepted 8 June 2001. 相似文献
13.
14.
Dong Yun Ha Soon Haing Cho Young Kwon Kim Solomon W Leung 《Water environment research》2008,80(8):748-756
This study provides biodegradability of organics in leachate according to their molecular mass distributions (<0.5, 0.5 to 1, 1 to 3, 10, and >10 KDa). Organics with molecular mass values lower than 0.5 KDa were the predominant species in the raw leachate filtrate, and the aerated lagoon process was very effective in treating these highly biodegradable organics; the Fenton's oxidation process was very effective in treating not-so-biodegradable organics with molecular mass values higher than 0.5 KDa, but a portion of these organics were converted into organics <0.5 KDa after Fenton's oxidation. An oxygen uptake measurement using a respirometer was more sensitive than a conventional biochemical oxygen demand measurement to evaluate bioactivities, especially when bioactivities were low. 相似文献
15.
16.
17.
18.
19.
20.