全文获取类型
收费全文 | 97篇 |
免费 | 0篇 |
专业分类
安全科学 | 3篇 |
废物处理 | 4篇 |
环保管理 | 9篇 |
综合类 | 46篇 |
基础理论 | 6篇 |
污染及防治 | 23篇 |
评价与监测 | 4篇 |
社会与环境 | 2篇 |
出版年
2020年 | 1篇 |
2016年 | 2篇 |
2015年 | 1篇 |
2014年 | 2篇 |
2013年 | 12篇 |
2012年 | 4篇 |
2011年 | 1篇 |
2010年 | 1篇 |
2009年 | 3篇 |
2007年 | 7篇 |
2006年 | 3篇 |
2003年 | 1篇 |
2002年 | 10篇 |
2001年 | 2篇 |
2000年 | 2篇 |
1998年 | 1篇 |
1995年 | 1篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1988年 | 2篇 |
1984年 | 1篇 |
1982年 | 1篇 |
1980年 | 1篇 |
1976年 | 1篇 |
1975年 | 1篇 |
1969年 | 1篇 |
1967年 | 1篇 |
1965年 | 2篇 |
1964年 | 2篇 |
1963年 | 1篇 |
1962年 | 1篇 |
1961年 | 4篇 |
1959年 | 4篇 |
1958年 | 1篇 |
1957年 | 1篇 |
1956年 | 1篇 |
1955年 | 1篇 |
1940年 | 1篇 |
1934年 | 1篇 |
1932年 | 1篇 |
1928年 | 1篇 |
1927年 | 1篇 |
1926年 | 1篇 |
1925年 | 1篇 |
1924年 | 1篇 |
1919年 | 1篇 |
1918年 | 2篇 |
1913年 | 2篇 |
排序方式: 共有97条查询结果,搜索用时 468 毫秒
21.
22.
P. S. Hart J. Bodurtha F. O. Redwine J. S. Smeltzer L. Kucera J. B. McCall J. A. Brown 《黑龙江环境通报》1990,10(3):169-173
The most prevalent soft tissue tumour in children is rhabdomyosarcoma. These tumours may develop within or outside of muscle anywhere in the body and at any age. We report what is apparently the earliest case of non-cardiac rhabdomyosarcoma detected prenatally. 相似文献
23.
Prof. Dr. Emil Baur 《Die Naturwissenschaften》1913,1(20):474-477
24.
25.
26.
27.
28.
Dr. Emil Ungerer 《Die Naturwissenschaften》1918,6(47):683-691
29.
S.P. Kucera J.M. Swann J.R. Kennedy T.W. Schultz 《Journal of environmental science and health. Part. B》2013,48(6):779-799
Abstract The effects of the fungicide benomyl and its breakdown products, carbendazim and butyl isocyanate, were examined on canine tracheal epithelial tissue in primary culture. Changes in ciliary frequencies were monitored with an optical spectrum analysis system. Serial dilutions of the test compounds were prepared in 100% corn oil and applied to the cell cultures for intervals up to 6 hours and frequencies measured at intervals of 15 minutes to 1 hour. Benomyl and butyl isocyanate caused concentration‐dependent decreases in ciliary beat frequency. Benomyl at 300 μg/ml (3 mM) caused ciliostasis within 75 minutes of exposure. Butyl isocyanate at a molar concentration three times lower than benomyl (1 mM) caused a similar response, although within 30 minutes. The IBC50 for benomyl was 0.75 mM, while for butyl isocyanate it was 0.52 mM. Carbendazim caused a moderate decrease in frequency over a 6 hour exposure period. Benomyl caused moderate to severe swelling of the mitochondria of ciliated epithelial cells with other cell organelles appearing normal. Butyl isocyanate did not cause any noticeable effect on cell ultrastructure and the apparently low rate of penetration of carbendazim into cells made it impossible to obtain an effect which justified ultrastructural analysis. It appears, at least for benomyl and butyl isocyanate, that while the physiological effect of these two compounds (inhibition of ciliary beat) is the same, the sites of action in the cell may be different. 相似文献
30.
Mario Schirmer John W. Molson Emil O. Frind James F. Barker 《Journal of contaminant hydrology》2000,46(3-4)
Biodegradation of organic contaminants in groundwater is a microscale process which is often observed on scales of 100s of metres or larger. Unfortunately, there are no known equivalent parameters for characterizing the biodegradation process at the macroscale as there are, for example, in the case of hydrodynamic dispersion. Zero- and first-order degradation rates estimated at the laboratory scale by model fitting generally overpredict the rate of biodegradation when applied to the field scale because limited electron acceptor availability and microbial growth are not considered. On the other hand, field-estimated zero- and first-order rates are often not suitable for predicting plume development because they may oversimplify or neglect several key field scale processes, phenomena and characteristics. This study uses the numerical model BIO3D to link the laboratory and field scales by applying laboratory-derived Monod kinetic degradation parameters to simulate a dissolved gasoline field experiment at the Canadian Forces Base (CFB) Borden. All input parameters were derived from independent laboratory and field measurements or taken from the literature a priori to the simulations. The simulated results match the experimental results reasonably well without model calibration. A sensitivity analysis on the most uncertain input parameters showed only a minor influence on the simulation results. Furthermore, it is shown that the flow field, the amount of electron acceptor (oxygen) available, and the Monod kinetic parameters have a significant influence on the simulated results. It is concluded that laboratory-derived Monod kinetic parameters can adequately describe field scale degradation, provided all controlling factors are incorporated in the field scale model. These factors include advective–dispersive transport of multiple contaminants and electron acceptors and large-scale spatial heterogeneities. 相似文献