全文获取类型
收费全文 | 396篇 |
免费 | 15篇 |
国内免费 | 101篇 |
专业分类
安全科学 | 27篇 |
废物处理 | 27篇 |
环保管理 | 39篇 |
综合类 | 173篇 |
基础理论 | 78篇 |
环境理论 | 1篇 |
污染及防治 | 122篇 |
评价与监测 | 25篇 |
社会与环境 | 9篇 |
灾害及防治 | 11篇 |
出版年
2023年 | 6篇 |
2022年 | 26篇 |
2021年 | 16篇 |
2020年 | 13篇 |
2019年 | 14篇 |
2018年 | 18篇 |
2017年 | 14篇 |
2016年 | 17篇 |
2015年 | 17篇 |
2014年 | 30篇 |
2013年 | 41篇 |
2012年 | 35篇 |
2011年 | 30篇 |
2010年 | 20篇 |
2009年 | 22篇 |
2008年 | 29篇 |
2007年 | 21篇 |
2006年 | 17篇 |
2005年 | 16篇 |
2004年 | 16篇 |
2003年 | 12篇 |
2002年 | 12篇 |
2001年 | 8篇 |
2000年 | 9篇 |
1999年 | 10篇 |
1998年 | 8篇 |
1997年 | 5篇 |
1996年 | 4篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1993年 | 2篇 |
1992年 | 5篇 |
1991年 | 3篇 |
1990年 | 4篇 |
1989年 | 2篇 |
1986年 | 1篇 |
1985年 | 3篇 |
1984年 | 1篇 |
1973年 | 1篇 |
1972年 | 1篇 |
排序方式: 共有512条查询结果,搜索用时 15 毫秒
1.
Luo Xiaofang Dessie Wubliker Wang Meifeng Duns Gregory J. Rong Nianhang Feng Luya Zeng Jianqing Qin Zuodong Tan Yimin 《Journal of Material Cycles and Waste Management》2021,23(2):548-556
Journal of Material Cycles and Waste Management - The traditional Chinese medicinal plant Magnolia officinalis has a wide range of applications; including more than 200 kinds of patented Chinese... 相似文献
2.
This research aimed to evaluate the alga Scenedesmus obliquus toxicity induced by textiledyeing effluents(TDE).The toxicity indicator of TDE in alga at the physiological(algal growyth),biochemical(chlorophyll-a(Chl-a) synthesis and superoxide dismutase(SOD) activity) and structural(cell membrane integrity) level were investigated.Then we further study the relationship among toxicity indicators at physiological and biochemical level,and supplemented by research on algal biomacromolecules.According to the analysis of various endpoints of the alga,the general sensitivity sequence of toxicity endpoints of Scenedesmus obliquus was:SOD activity Chl-a synthesis algal growth.The stimulation rate of SOD activity increased from day 3(57.25%~83.02%) to day 6(57.25%~103.81%),and then decreased on day 15(-4.23%~-32.96%),which indicated that the antioxidant balance system of the algal cells was destroyed.The rate of Chl-a synthesis inhibition increased gradually,reaching19.70%~79.39% on day 15,while the rate of growth inhibition increased from day 3(-12.90%~10.16%) to day 15(-21.27%~72.46%).Moreover,the algal growth inhibition rate was positively correlated with the inhibition rate of SOD activity or Chl-a synthesis,with the correlation coefficients were 0.6713 and 0.5217,respectively.Algal cells would be stimulating to produce excessive reactive oxygen species,which would cause peroxidation in the cells,thereby destroying chloroplasts,inhibiting chlorophyll synthesis and reducing photosynthesis.With increasing exposure time,irreversible damage to algae can lead to death.This study is expected to enhance our understanding of the ecological risks through algal tests caused by TDE. 相似文献
3.
Arsenobetaine, two arsenosugars, dimethylarsinate and several unidentified arsenic species were detected in extracts of the haemolymph of the Dungeness crab, Cancer magister, by using HPLC-ICP-MS. This is the first report of the presence of arsenosugars in the haemolymph/blood of marine animals. Total, extractable and residual arsenic concentrations were determined by ICP-MS. The concentration of total arsenic was in the range of 1.4-3.8 [micro sign]g ml(-1). Nearly all (98%) the arsenic was found to be extractable, and accounted for primarily by arsenobetaine, two arsenosugars and dimethylarsinate. The results demonstrate that arsenic compounds present in the diet of crabs are not fully metabolized in the gut. They are, at least partly, taken up into the haemolymph. The concurrence of arsenobetaine and arsenosugars suggests that the use of repeated haemolymph sampling in crustaceans could facilitate investigations into the kinetics of the biotransformation pathways of arsenic compounds. Finally, the present study clearly demonstrates the unique capabilities of HPLC-ICP-MS for the detection and identification of minor arsenic components amongst the predominant arsenobetaine. 相似文献
4.
本文简述了室内有害气体氨气污染对人类健康的危害 ,详细介绍了日前国内外测量室内空气中氨含量所应用的不同方法 ,研究讨论了各种方法的最低检测浓度 ,在具体检测中各种不同方法的干扰离子以及干扰离子所允许的最高浓度 ,比较各种不同方法的优劣 相似文献
5.
赖智华 《防灾科技学院学报》2007,9(1):69-72
震相识别与分析是地震预报与速报的基础.为识别赣南地区的震相,用震例统计和实例说明了不同距离,不同方位,不同类型的地震震相特征、地震震相与爆破波形的区别,并阐述了如何快速、准确地对有感地震进行速报. 相似文献
6.
推行清洁生产实现可持续发展 总被引:1,自引:1,他引:1
赖周平 《石油化工环境保护》1999,(4):15-19
对集团公司全面开展清洁生产的情况做了综述和总结,几年来的清洁生产实践表明,清洁生产促进了石化企业的发展,同时降低了废物排放,取得了明显的成果。清洁生产是保护环境的有力手段,也是实施可持续发展战略的重要措施 相似文献
7.
略论麦草资源的综合利用 总被引:1,自引:0,他引:1
郁建强 《资源节约和综合利用》1999,(4):31-31,35
本文简单介绍了麦草的纤维特性与小麦苗营养价值,在此基础上,总结了我国近几年发展的麦草利用途径与评价,最后讨论了麦草综合利用的前景。 相似文献
8.
9.
10.
Lai Li-Wei Cheng Wan-Li 《Environmental science and pollution research international》2017,24(17):14924-14933
Environmental Science and Pollution Research - Daily time air quality indices, which can reflect air quality in 1 day, are suitable for identifying daily exposure during conditions of poor... 相似文献