全文获取类型
收费全文 | 146篇 |
免费 | 0篇 |
专业分类
安全科学 | 1篇 |
废物处理 | 3篇 |
环保管理 | 7篇 |
综合类 | 77篇 |
基础理论 | 22篇 |
污染及防治 | 29篇 |
评价与监测 | 5篇 |
社会与环境 | 2篇 |
出版年
2022年 | 2篇 |
2018年 | 2篇 |
2016年 | 4篇 |
2015年 | 2篇 |
2014年 | 2篇 |
2013年 | 6篇 |
2012年 | 2篇 |
2011年 | 12篇 |
2010年 | 2篇 |
2009年 | 5篇 |
2007年 | 7篇 |
2006年 | 5篇 |
2005年 | 2篇 |
2004年 | 6篇 |
2003年 | 1篇 |
2002年 | 1篇 |
2001年 | 4篇 |
2000年 | 1篇 |
1999年 | 6篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1989年 | 2篇 |
1988年 | 1篇 |
1985年 | 1篇 |
1980年 | 1篇 |
1978年 | 2篇 |
1976年 | 1篇 |
1974年 | 1篇 |
1970年 | 1篇 |
1968年 | 1篇 |
1967年 | 3篇 |
1966年 | 1篇 |
1965年 | 3篇 |
1964年 | 2篇 |
1963年 | 1篇 |
1962年 | 4篇 |
1960年 | 4篇 |
1959年 | 3篇 |
1958年 | 3篇 |
1957年 | 2篇 |
1956年 | 2篇 |
1955年 | 7篇 |
1954年 | 6篇 |
1953年 | 2篇 |
1952年 | 3篇 |
1951年 | 4篇 |
1950年 | 2篇 |
1949年 | 3篇 |
排序方式: 共有146条查询结果,搜索用时 218 毫秒
1.
Galia Yaari Georgio Tachiev Timothy R. Dean Doris Betancourt Stephanie Long 《补救:环境净化治理成本、技术与工艺杂志》2007,17(2):109-126
The survival of aqueous suspensions of Penicillium chrysogenum, Stachybotrys chartarum, Aspergillus versicolor, and Cladosporium cladosporioides spores was evaluated using various combinations of hydrogen peroxide and Fe2+ as catalyst. Spore concentrations of 106–107 colony forming units per milliliter (CFU/mL) were suspended in water and treated with initial hydrogen peroxide and iron concentrations ranging from 0.05 to 10 percent and 100 to 200 ppm, respectively. After four hours of reaction time, samples were plated on agar plates, and the viable fraction of spores was determined by the number of colonies formed. Hydrogen peroxide concentrations above 50,000 ppm resulted in greater than 6‐log10 reduction of viable spores for both catalyzed and noncatalyzed reactions. Iron had a strong catalytic effect when added to solutions with hydrogen peroxide concentration above 5,000 ppm and resulted in two to three orders of magnitude greater reduction compared to hydrogen peroxide alone. Additional samples taken after 24 hours of reaction time showed that the effect of the addition of 100 and 200 ppm of Fe2+ catalyst was mostly kinetic, and noncatalyzed hydrogen peroxide had sporicidal effects similar to catalyzed hydrogen peroxide. This study identified initial reagent concentrations of hydrogen peroxide and Fe2+ that accomplish a 6‐log10 reduction of viable mold spores within reaction times of 4 and 24 hours. © 2007 Wiley Periodicals, Inc. 相似文献
2.
Becker E. W. Bier W. Ehrfeld W. Schubert K. Schütte R. Seidel D. 《Die Naturwissenschaften》1976,63(9):407-411
The Science of Nature - The development of reliable manufacturing methods for commercial separation elements, the successful operation of separative stages, and extensive tests performed on plant... 相似文献
3.
4.
5.
6.
G. Schubert 《Die Naturwissenschaften》1963,50(6):229-230
7.
8.
9.
10.
Plant biomass is known to increase in response to elevated atmospheric CO2 concentration (pCO2); however, no experiments have quantified the trajectory of crop fertilization across the full range of pCO2 levels estimated for the next 300 years. Here we quantify the above- and below-ground biomass response of Raphanus sativus (common radish) across eight pCO2 levels ranging from 348 to 1791 ppmv. We observed a large net biomass increase of 58% above ground and 279% below ground. A large part of the net increase (38% of the above-ground and 53% of the below-ground) represented biomass fertilization at the high levels of pCO2 (700–1791 ppmv) predicted if fossil fuel emissions continue unabated. The trajectory of below-ground fertilization in R. sativus greatly exceeded a trajectory based on extrapolation of previous experiments for plants grown at pCO2 < 800 ppmv. Based on the experimental parameters used to grow these plants, we hypothesize that these experiments represent the maximum CO2 fertilization that can be achieved for this plant growing under low light levels. If the below-ground biomass enhancement that we have quantified for R. sativus represents a generalized root-crop response that can be extrapolated to agricultural systems, below-ground fertilization under very high pCO2 levels could dramatically augment crop production in some of the poorest nations of the world, provided that water resources are sufficient and sustainable. 相似文献