全文获取类型
收费全文 | 928篇 |
免费 | 10篇 |
国内免费 | 6篇 |
专业分类
安全科学 | 51篇 |
废物处理 | 38篇 |
环保管理 | 60篇 |
综合类 | 220篇 |
基础理论 | 185篇 |
环境理论 | 1篇 |
污染及防治 | 282篇 |
评价与监测 | 58篇 |
社会与环境 | 46篇 |
灾害及防治 | 3篇 |
出版年
2023年 | 7篇 |
2022年 | 6篇 |
2021年 | 17篇 |
2020年 | 10篇 |
2019年 | 12篇 |
2018年 | 20篇 |
2017年 | 22篇 |
2016年 | 35篇 |
2015年 | 19篇 |
2014年 | 34篇 |
2013年 | 68篇 |
2012年 | 32篇 |
2011年 | 70篇 |
2010年 | 25篇 |
2009年 | 32篇 |
2008年 | 57篇 |
2007年 | 50篇 |
2006年 | 39篇 |
2005年 | 48篇 |
2004年 | 32篇 |
2003年 | 35篇 |
2002年 | 22篇 |
2001年 | 23篇 |
2000年 | 4篇 |
1999年 | 19篇 |
1998年 | 8篇 |
1996年 | 7篇 |
1995年 | 8篇 |
1994年 | 9篇 |
1993年 | 6篇 |
1992年 | 5篇 |
1989年 | 7篇 |
1988年 | 6篇 |
1985年 | 4篇 |
1984年 | 4篇 |
1982年 | 7篇 |
1981年 | 4篇 |
1979年 | 5篇 |
1966年 | 3篇 |
1965年 | 11篇 |
1964年 | 4篇 |
1963年 | 6篇 |
1961年 | 3篇 |
1958年 | 6篇 |
1957年 | 8篇 |
1955年 | 4篇 |
1934年 | 3篇 |
1920年 | 4篇 |
1917年 | 3篇 |
1916年 | 6篇 |
排序方式: 共有944条查询结果,搜索用时 15 毫秒
941.
Morville S Scheyer A Mirabel P Millet M 《Environmental science and pollution research international》2006,13(2):83-89
Goal, Scope and Background Atmospheric sampling (gas and particles) of 5 phenols (phenol, m-cresol, p-cresol, o-cresol, pentachlorophenol) and 15 nitrophenols
(3-methyl-2-nitrophenol, 3-nitrophenol, 4-methyl-2-nitrophenol, 5-methyl-2-nitrophenol, 2-methyl-3nitrophenol, 3-methyl-4-nitrophenol,
2,6-dinitrophenol, bromoxynil, 2,5-dinitrophenol, 2,6-dinitro-p-cresol, 2,4-dinitrophenol, ioxynil, DNOC, 3,4-dinitrophenol,
dinoseb) on XAD-2 resin (20 gr) and glass fibre filters, respectively, were performed in 2002 by using 'Digitel DA80' high
volume samplers. These measurements were undertaken in order to show spatial and geographical variations of concentrations
and the role of traffic in the emissions of these compounds to the atmosphere.
Methods Sampling were performed in Strasbourg (eastern France), in its vicinity (Schiltigheim) and in Erstein. Sites were chosen
to be representative of urban (Strasbourg), suburban (Schiltigheim) and rural (Erstein) conditions. Field campaigns were undertaken
simultaneously in urban and suburban sites during all the seasons during 4 hours at a flow rate of 60 m3.h-1, which gives
a total of 240 m3 of air per sample. Period of sampling varied between 06h00 to 10h00, 11h00 to 15h00 and 18h00 to 22h00 in
order to evaluate a variation of concentration during automobile traffic between urban, suburban and rural areas. Gas and
particle samples were separately Soxhlet extracted for 12 h with a mixture of CH2Cl2 / n-hexane (50:50 v/v), concentrated
to about 1 mL with a rotary evaporated and finally dried under nitrogen. Dry extracts were dissolved in 1 mL of CH3CN. Before
analysis, extracts were sylilated by using MTBSTFA. Analysis was performed by GC/MSD in the SIM mode.
Results and Discussion Partitioning of phenolic compounds between gas and particle phases seems to be mainly correlated with vapour pressure. Among
phenolic compounds analysed, phenol, p-cresol, pentachlorophenol and 2.4-dinitrophenol were detected in all samples and emissions
from traffic seems to be the major source for the presence of these compounds to the atmosphere. No increase of concentrations
in autumn tend to confirm this hypothesis since, with the use of domestic heating in colder months, increases of PAHs concentrations
were observed and these compounds are known to be emitted by all combustion processes.
Pentachlorophenol is a special case since this molecule is only used as wood preservative. Its presence in all atmospheric
samples, whatever the locations and the period of time is the consequence of its persistence.
Conclusions and Perspectives These measurements demonstrate that phenols and nitrophenols are emitted to the atmosphere and further measurements, in order
to confirm their sources, their behaviour and their potential impact to the air quality and to human health should be undertaken
especially since the literature collected is relatively old. Concentrations of pentachlorophenol measured are very low and,
due to its toxicity, further investigations should be undertaken.
- * The basis of this peer-reviewed paper is a presentation at the 9th FECS Conference on 'Chemistry and Environment', 29 August
to 1 September 2004, Bordeaux, France. 相似文献
942.
通过离子选择电极法测定Fe3+和Al3+不同含量的土壤样品中水溶性氟化物试验,研究Fe3+和Al3+对测定的干扰与消除方法,证实了在总离子强度调节缓冲溶液共存下,Fe3+和Al3+对土壤提取液中水溶性氟化物检测结果存在不同程度的负干扰。选择6种代表性土壤样品,在水溶性氟化物提取液中加入20 mg/L的Al3+和100 mg/L的Fe3+做干扰试验,比较了分取不同体积土壤提取液对氟化物检测结果的影响,结果表明,对水溶性ρ(Fe3+)和ρ(Al3+)高的土壤样品,可选择减少提取液取样体积来消除干扰。选取的5种标准样品测试结果与标准值相符,干扰消除方法具有良好的适用性。 相似文献
943.
While scholars have demonstrated that emotions play a central role in cognition, behavior, and decision making, most of the studies on emotions in work contexts show that emotions, or their expression, are often suppressed. We thus investigated how workers in high-stress work environments deal with emotions and remain functional by focusing on the range of extrinsic regulation strategies used by workers in these environments. Drawing from participant observations and in-depth, semistructured interviews, we show how police officers are flexible in their choices of emotion-regulation strategies and how contextual factors emerge as the crux of this process. We contribute to the understanding of regulatory flexibility—defined as the process of matching emotion regulation strategies to environmental circumstances as they unfold in real work situations—by identifying two main enabling factors: coregulation and third party interference. 相似文献
944.
Volant Chloé Balnois Eric Vignaud Guillaume Magueresse Anthony Bruzaud Stéphane 《Journal of Polymers and the Environment》2022,30(6):2254-2269
Journal of Polymers and the Environment - Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) were used to prepare microbeads, with diameter ranging from... 相似文献