全文获取类型
收费全文 | 63篇 |
免费 | 2篇 |
专业分类
安全科学 | 3篇 |
废物处理 | 2篇 |
环保管理 | 7篇 |
综合类 | 14篇 |
基础理论 | 9篇 |
污染及防治 | 26篇 |
评价与监测 | 1篇 |
社会与环境 | 2篇 |
灾害及防治 | 1篇 |
出版年
2021年 | 1篇 |
2020年 | 1篇 |
2018年 | 1篇 |
2017年 | 1篇 |
2016年 | 2篇 |
2015年 | 1篇 |
2014年 | 2篇 |
2013年 | 18篇 |
2011年 | 1篇 |
2009年 | 1篇 |
2008年 | 2篇 |
2007年 | 3篇 |
2006年 | 1篇 |
2005年 | 2篇 |
2004年 | 2篇 |
2003年 | 2篇 |
2002年 | 1篇 |
2001年 | 1篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1994年 | 1篇 |
1992年 | 1篇 |
1989年 | 2篇 |
1987年 | 1篇 |
1983年 | 1篇 |
1982年 | 3篇 |
1979年 | 2篇 |
1973年 | 2篇 |
1972年 | 1篇 |
1969年 | 1篇 |
1967年 | 1篇 |
1966年 | 1篇 |
1965年 | 1篇 |
1933年 | 1篇 |
1925年 | 1篇 |
排序方式: 共有65条查询结果,搜索用时 62 毫秒
61.
High temperature sulfur removal can be achieved with calcium-based sor-bents (e.g. dolomite) in fluidized-bed çoal gasification systems now being developed for power generation. The use of dolomite offers the opportunity to meet environmental emission standards, to minimize energy losses, and to reduce electrical energy costs. In addition to removing sulfur from the low-Btu gas, the complete sulfur removal system must be integrated with the total power plant and environment to assure compatibility. Critical requirements for achieving commercial system include establishing criteria for ‘acceptable’ sorbents, establishing integrated sulfur removal/gasification process design parameters, predicting trace element release, predicting sorbent attrition, developing an economic regeneration and/or once through process option, developing a spent sorbent processing system, and establishing safe and reliable disposition options for spent sorbent. Design and operating parameters are being developed and potential process limitations are identified. 相似文献
62.
63.
64.
B. Katz 《Die Naturwissenschaften》1979,66(12):606-610
The analysis of chemical transmission at synapses, in particular at the neuromuscular junction, has proceeded from the cellular to the molecular level. Gradual refinements in electric recording technique have brought to light new features, first the quantal delivery of the transmitter substance, in multimolecular packets, from the nerve endings, and more recently the statistical elements of the postsynaptic potential change which arise from the molecular bombardment by acetylcholine and the transient opening of individual ion channels in the end-plate membrane 相似文献
65.
Deep-sea hydrothermal vent ecosystems host both symbiotic and non-symbiotic invertebrates. The non-symbiotic vent fauna is
generally assumed to rely on free-living chemoautotrophic bacteria as their main food source but other sources such as detritus
have recently been suggested to be a part of the invertebrate diets. Little is known about how food availability influences
the distribution of vent organisms on a small scale. In addition, the feeding ecology and role of small, often numerically
dominant invertebrates, the meiofauna is poorly understood at vents. In this study, we used stable carbon and nitrogen isotopic
analysis to investigate the role of particulate detritus in the diets of macro- and meiobenthic invertebrates within three
vent assemblages at Axial Volcano, Juan de Fuca Ridge, and Northeast Pacific. Particulate organic matter of a detrital origin
became more important in the diet of invertebrates in assemblages typically associated with low-hydrothermal flow intensities.
Meiobenthic species occupied several different feeding guilds and trophic levels in the assemblages investigated. We conclude
that small-scale spatial variability in food sources is an important feature of vent food webs and that spatial patterns observed
here and elsewhere are shaped by variations in hydrothermal discharge. 相似文献