全文获取类型
收费全文 | 454篇 |
免费 | 13篇 |
国内免费 | 14篇 |
专业分类
安全科学 | 14篇 |
废物处理 | 5篇 |
环保管理 | 90篇 |
综合类 | 113篇 |
基础理论 | 129篇 |
环境理论 | 2篇 |
污染及防治 | 78篇 |
评价与监测 | 28篇 |
社会与环境 | 18篇 |
灾害及防治 | 4篇 |
出版年
2023年 | 10篇 |
2022年 | 10篇 |
2021年 | 13篇 |
2020年 | 5篇 |
2019年 | 8篇 |
2018年 | 20篇 |
2017年 | 16篇 |
2016年 | 18篇 |
2015年 | 22篇 |
2014年 | 20篇 |
2013年 | 29篇 |
2012年 | 22篇 |
2011年 | 28篇 |
2010年 | 25篇 |
2009年 | 19篇 |
2008年 | 39篇 |
2007年 | 31篇 |
2006年 | 20篇 |
2005年 | 16篇 |
2004年 | 15篇 |
2003年 | 8篇 |
2002年 | 9篇 |
2001年 | 8篇 |
2000年 | 2篇 |
1999年 | 4篇 |
1998年 | 8篇 |
1997年 | 3篇 |
1995年 | 10篇 |
1994年 | 3篇 |
1993年 | 7篇 |
1992年 | 3篇 |
1991年 | 3篇 |
1990年 | 5篇 |
1989年 | 3篇 |
1988年 | 2篇 |
1987年 | 4篇 |
1986年 | 6篇 |
1985年 | 2篇 |
1983年 | 1篇 |
1981年 | 1篇 |
1979年 | 1篇 |
1975年 | 1篇 |
1974年 | 1篇 |
排序方式: 共有481条查询结果,搜索用时 15 毫秒
441.
Particulate matter emissions and gaseous air toxic pollutants from commercial meat cooking operations 总被引:1,自引:0,他引:1
Nicholas Gysel William A.Welch Chia-Li Chen Poornima Dixit David R.Cocker Ⅲ Georgios Karavalakis 《环境科学学报(英文版)》2018,30(3):162-170
This study assessed the effectiveness of three novel control technologies for particulate matter (PM) and volatile organic compound (VOC) removal from commercial meat cooking operations. All experiments were conducted using standardized procedures at University of California, Riverside''s commercial test cooking facility. PM mass emissions collected using South Coast Air Quality Management District (SCAQMD) Method 5.1, as well as a dilution tunnel-based PM method showed statistically significantly reductions for each control technology when compared to baseline testing (i.e., without a catalyst). Overall, particle number emissions decreased with the use of control technologies, with the exception of control technology 2 (CT2), which is a grease removal technology based on boundary layer momentum transfer (BLMT) theory. Particle size distributions were unimodal with CT2 resulting in higher particle number populations at lower particle diameters. Organic carbon was the dominant PM component (> 99%) for all experiments. Formaldehyde and acetaldehyde were the most abundant carbonyl compounds and showed reductions with the application of the control technologies. Some reductions in mono-aromatic VOCs were also observed with CT2 and the electrostatic precipitator (ESP) CT3 compared to the baseline testing. 相似文献
442.
James J. Foster Shelby E. Temple Martin J. How Ilse M. Daly Camilla R. Sharkey David Wilby Nicholas W. Roberts 《Die Naturwissenschaften》2018,105(3-4):27
In recent years, the study of polarisation vision in animals has seen numerous breakthroughs, not just in terms of what is known about the function of this sensory ability, but also in the experimental methods by which polarisation can be controlled, presented and measured. Once thought to be limited to only a few animal species, polarisation sensitivity is now known to be widespread across many taxonomic groups, and advances in experimental techniques are, in part, responsible for these discoveries. Nevertheless, its study remains challenging, perhaps because of our own poor sensitivity to the polarisation of light, but equally as a result of the slow spread of new practices and methodological innovations within the field. In this review, we introduce the most important steps in designing and calibrating polarised stimuli, within the broader context of areas of current research and the applications of new techniques to key questions. Our aim is to provide a constructive guide to help researchers, particularly those with no background in the physics of polarisation, to design robust experiments that are free from confounding factors. 相似文献
443.
444.
445.
446.
447.
448.
449.
450.