全文获取类型
收费全文 | 69篇 |
免费 | 0篇 |
专业分类
安全科学 | 1篇 |
废物处理 | 1篇 |
环保管理 | 2篇 |
综合类 | 37篇 |
基础理论 | 7篇 |
污染及防治 | 17篇 |
评价与监测 | 2篇 |
社会与环境 | 2篇 |
出版年
2016年 | 1篇 |
2014年 | 2篇 |
2013年 | 10篇 |
2009年 | 1篇 |
2008年 | 1篇 |
2007年 | 2篇 |
2006年 | 2篇 |
2005年 | 1篇 |
2004年 | 2篇 |
2003年 | 4篇 |
1998年 | 2篇 |
1996年 | 1篇 |
1995年 | 2篇 |
1993年 | 2篇 |
1992年 | 1篇 |
1988年 | 1篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1975年 | 1篇 |
1974年 | 1篇 |
1966年 | 1篇 |
1964年 | 1篇 |
1961年 | 1篇 |
1960年 | 1篇 |
1959年 | 2篇 |
1958年 | 2篇 |
1957年 | 1篇 |
1956年 | 2篇 |
1955年 | 1篇 |
1953年 | 1篇 |
1952年 | 1篇 |
1951年 | 1篇 |
1950年 | 1篇 |
1948年 | 2篇 |
1947年 | 1篇 |
1943年 | 1篇 |
1941年 | 1篇 |
1938年 | 1篇 |
1937年 | 1篇 |
1936年 | 2篇 |
1927年 | 2篇 |
1926年 | 1篇 |
1914年 | 1篇 |
1913年 | 1篇 |
排序方式: 共有69条查询结果,搜索用时 814 毫秒
11.
12.
Dr. August Thienemann 《Die Naturwissenschaften》1913,1(48):1163-1167
13.
14.
15.
The present dispersion of nature reserves in South Africa is the historical result of a series of ad hoc decisions and may not be biologically optimal We have adopted a method to identify the optimal geography of nature reserves for the conservation of South Africa's snake fauna. The method of reserve selection operated on two tiers, and the spatial unit of analysis was a quarter-degree-square cell (∼625 km2 ). First, two scoring indices were used to rank cells with respect to species richness or to rarity. Second, two different iterative reserve-selection algorithms selected sets of cells (reserves), where each set represented all snake species at least once. Finally, the selected cells were examined for their present level of protection and their ranked scores. Depending on the algorithm chosen, only 23 or 29 cells were required to represent all species at least once; 72–78% of these cells already contained some level of protection; 59–70% of cells fell in areas of high species richness; and 72–91% of cells fell in areas with high rarity scores. Thus we conclude that most of the snake species in South Africa may be adequately protected with only modest acquisition of new reserves, and that the iterative algorithms appear to be efficient at siting cells in areas of high richness and rarity. We recommend that the reserve placement method outlined in this report be applied to as many other taxa as possible in the formulation of a national plan for an optimal reserve system for South Africa. 相似文献
16.
Nataliya Voloshchuk Mona Knop Thomas Colby Erich Kombrink Lothar Hennig Diana Hofmann Dieter Sicker Andrej Gryganski Margot Schulz 《Chemoecology》2007,17(1):1-12
Summary. Doratomyces stemonitis (Hyphomycetales, Dematiaceae) is a saprotrophic fungus belonging to the mycobiota of the cereal rhizosphere. The fungus is
able to metabolize benzoxazolin-2-(3H)-one and a variety of its derivatives including higher plant detoxification products, microbial degradation products and
the chemically rather stable 2-amino-(3H)-phenoxazin-3-one. D. stemonitis can use all of these compounds as sole C-sources but their utilization, especially that of microbial degradation products
and 2-amino-(3H)-phenoxazin-3-one, seems to be highly energy consuming, resulting in slow mycelium growth and a change of colony morphology.
Benzoxazolin-2-(3H)-one derived compounds induce the synthesis of different isoforms of a glycosylated protein with sequence homologies to the
endo-1,3-β-glucanase Asp f2, an allergen from Aspergillus fumigatus and other Asp f2-like proteins e.g., from Verticillium dahliae or PRA1 antigen from Candida albicans. The induction of the protein is regarded as a stress response. 相似文献
17.
18.
19.
20.