全文获取类型
收费全文 | 286篇 |
免费 | 0篇 |
专业分类
安全科学 | 2篇 |
废物处理 | 6篇 |
环保管理 | 8篇 |
综合类 | 126篇 |
基础理论 | 48篇 |
污染及防治 | 71篇 |
评价与监测 | 11篇 |
社会与环境 | 12篇 |
灾害及防治 | 2篇 |
出版年
2021年 | 3篇 |
2018年 | 8篇 |
2017年 | 4篇 |
2015年 | 7篇 |
2014年 | 13篇 |
2013年 | 7篇 |
2012年 | 6篇 |
2011年 | 7篇 |
2010年 | 12篇 |
2009年 | 10篇 |
2008年 | 8篇 |
2007年 | 9篇 |
2006年 | 8篇 |
2005年 | 8篇 |
2004年 | 6篇 |
2003年 | 8篇 |
2002年 | 6篇 |
1998年 | 7篇 |
1996年 | 7篇 |
1995年 | 3篇 |
1993年 | 4篇 |
1989年 | 4篇 |
1987年 | 3篇 |
1969年 | 2篇 |
1966年 | 3篇 |
1965年 | 5篇 |
1964年 | 2篇 |
1963年 | 7篇 |
1962年 | 4篇 |
1961年 | 3篇 |
1960年 | 2篇 |
1959年 | 5篇 |
1958年 | 5篇 |
1957年 | 3篇 |
1956年 | 10篇 |
1955年 | 7篇 |
1954年 | 3篇 |
1953年 | 3篇 |
1952年 | 2篇 |
1950年 | 2篇 |
1949年 | 2篇 |
1947年 | 2篇 |
1942年 | 2篇 |
1940年 | 2篇 |
1939年 | 4篇 |
1934年 | 3篇 |
1933年 | 2篇 |
1929年 | 2篇 |
1925年 | 2篇 |
1918年 | 2篇 |
排序方式: 共有286条查询结果,搜索用时 15 毫秒
81.
82.
83.
84.
85.
86.
Georg Lockemann G. Masing R. Schwarz K. Andrée S. Hollmann 《Die Naturwissenschaften》1953,40(14):395-396
87.
88.
89.
The caterpillars of the oleander hawk moth, Daphnis nerii (Linnaeus, 1758) (Lepidoptera: Sphingidae) feed primarily on oleander (Nerium oleander). This plant is rich in cardenolides, which specifically inhibit the Na+K+-ATPase. Since some insects feeding on cardenolide plants possess cardenolide-resistant Na+K+-ATPases, we tested whether D. nerii also possesses this strategy for circumventing cardenolide toxicity. To do so, we established a physiological assay, which allowed direct measurement of Na+K+-ATPase cardenolide sensitivity. Using Schistocerca gregaria, as a cardenolide-sensitive reference species, we showed that D. nerii Na+K+-ATPase was extremely sensitive to the cardenolide ouabain. Surprisingly, its sensitivity is even higher than that of the cardenolide-sensitive generalist, S. gregaria. The presence or absence of cardenolides in the diet of D. nerii did not influence the enzyme’s cardenolide sensitivity, indicating that target-site insensitivity is not inducible in this species. However, despite the sensitivity of their Na+K+-ATPase, caterpillars of D. nerii quickly recovered from an injection of an excessive amount of ouabain into their haemocoel. We conclude that D. nerii possesses adaptations, which enable it to feed on a cardenolide-rich diet other than that previously described in cardenolide specialized insects, and discuss other potential resistance mechanisms. 相似文献
90.
Anja Grawunder Dirk Merten Georg Büchel 《Environmental science and pollution research international》2014,21(11):6812-6823
The commonly observed enrichment of middle rare earth elements (MREE) in water sampled in acid mine drainage (AMD)-impacted areas was found to be the result of preferential release from the widespread mineral pyrite (FeS2). Three different mining-impacted sites in Europe were sampled for water, and various pyrite samples were used in batch experiments with diluted sulphuric acid simulating AMD-impacted water with high sulphate concentration and high acidity. All water samples independent on their origin from groundwater, creek water or lake water as well as on the surrounding rock types showed MREE enrichment. Also the pyrite samples showed MREE enrichment in the respective acidic leachate but not always in their total contents indicating a process-controlled release. It is discussed that most probably complexation to sulphite (SO3 2?) or another intermediate S-species during pyrite oxidation is the reason for the MREE enrichment in the normalized REE patterns. 相似文献