全文获取类型
收费全文 | 168篇 |
免费 | 1篇 |
国内免费 | 3篇 |
专业分类
安全科学 | 2篇 |
废物处理 | 4篇 |
环保管理 | 34篇 |
综合类 | 12篇 |
基础理论 | 35篇 |
污染及防治 | 64篇 |
评价与监测 | 15篇 |
社会与环境 | 4篇 |
灾害及防治 | 2篇 |
出版年
2021年 | 2篇 |
2020年 | 3篇 |
2019年 | 1篇 |
2017年 | 5篇 |
2016年 | 3篇 |
2015年 | 2篇 |
2014年 | 5篇 |
2013年 | 10篇 |
2012年 | 5篇 |
2011年 | 20篇 |
2010年 | 15篇 |
2009年 | 8篇 |
2008年 | 16篇 |
2007年 | 12篇 |
2006年 | 11篇 |
2005年 | 8篇 |
2004年 | 6篇 |
2003年 | 9篇 |
2002年 | 9篇 |
2000年 | 1篇 |
1999年 | 1篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1996年 | 4篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1992年 | 1篇 |
1990年 | 1篇 |
1989年 | 2篇 |
1988年 | 1篇 |
1986年 | 2篇 |
1983年 | 1篇 |
1981年 | 2篇 |
1980年 | 2篇 |
排序方式: 共有172条查询结果,搜索用时 15 毫秒
171.
172.
Development of microbial degradation of cypermethrin and diazinon in organically and conventionally managed soils 总被引:1,自引:0,他引:1
The behaviour of pesticides in the soil is a complex issue and is controlled by the physical, chemical and biological properties of the soil. The ability of microorganisms to degrade pesticides is not only controlled by the bioavailability of a chemical but also by their capacity to develop the ability to utilise available chemicals. The development of catabolism in the indigenous soil microflora of four organically and one conventionally managed soils was investigated for two pesticides: cypermethrin and diazinon. Soils were amended with cypermethrin and diazinon and aged for 0, 2, 4, 6, 8, and 14 weeks and, at each time point, mineralisation of freshly added 14C-cypermethrin or 14C-diazinon was measured by trapping 14CO2. In general, contact times between the soil and the pesticide resulted in a reduction in the lag phase (the period of time before mineralisation exceeded 5% of the added activity), followed by increases in the extent of mineralisation. Cypermethrin was mineralised significantly in all soils; whereas, diazinon was only appreciably mineralised in two of the soils, most notably in the organic soil from Redesdale. Statistical analysis showed pH and organic matter content of the soil had a significant effect on the extent of mineralisation (P< or = 0.05) of the cypermethrin in the soils. 相似文献