全文获取类型
| 收费全文 | 146篇 |
| 免费 | 23篇 |
专业分类
| 林业 | 18篇 |
| 5篇 | |
| 综合类 | 9篇 |
| 农作物 | 5篇 |
| 水产渔业 | 7篇 |
| 畜牧兽医 | 103篇 |
| 园艺 | 1篇 |
| 植物保护 | 21篇 |
出版年
| 2023年 | 2篇 |
| 2022年 | 4篇 |
| 2021年 | 1篇 |
| 2020年 | 7篇 |
| 2019年 | 5篇 |
| 2018年 | 6篇 |
| 2017年 | 8篇 |
| 2016年 | 8篇 |
| 2015年 | 7篇 |
| 2014年 | 3篇 |
| 2013年 | 8篇 |
| 2012年 | 1篇 |
| 2010年 | 3篇 |
| 2009年 | 5篇 |
| 2008年 | 4篇 |
| 2007年 | 5篇 |
| 2006年 | 1篇 |
| 2005年 | 2篇 |
| 2004年 | 4篇 |
| 2003年 | 2篇 |
| 2002年 | 4篇 |
| 2000年 | 6篇 |
| 1999年 | 8篇 |
| 1998年 | 8篇 |
| 1997年 | 6篇 |
| 1996年 | 4篇 |
| 1995年 | 3篇 |
| 1993年 | 5篇 |
| 1991年 | 3篇 |
| 1990年 | 4篇 |
| 1989年 | 2篇 |
| 1988年 | 3篇 |
| 1987年 | 1篇 |
| 1986年 | 2篇 |
| 1979年 | 3篇 |
| 1977年 | 1篇 |
| 1976年 | 1篇 |
| 1975年 | 2篇 |
| 1974年 | 5篇 |
| 1973年 | 3篇 |
| 1970年 | 1篇 |
| 1968年 | 3篇 |
| 1967年 | 1篇 |
| 1966年 | 4篇 |
排序方式： 共有169条查询结果，搜索用时 15 毫秒
51.
52.
53.
54.
55.
56.
SUMMARY A haemagglutination inhibition assay was used to detect antibody to psittacine beak and feather disease virus in sera from wild sulphur crested cockatoos (Cacatua galerita), galahs (Eolophus roseicapillus), short-billed corellas (Cacatua sanguinea), eastern long-billed corellas (Cacatua tenuirostris) and other psittacine birds in New South Wales. The seroprevalence of psittacine beak and feather disease ranged from 41% to 94% in different flocks, indicating infection with the virus is widespread in wild populations. 相似文献
57.
58.
59.
A. F. Abdel-Fattah D. A. Zaki M. Edrees 《Plant foods for human nutrition (Dordrecht, Netherlands)》1975,24(3-4):311-316
Pectin was found in the fruits ofDovyalis caffra W. (3.7%). Acid hydrolysis of the isolated pectin material afforded galacturonic acid (63%), galactose (26.8%), arabinose (2.13%), xylose (1.42%), and rhamnose (0.3%). With sugar and acid, pectin gave a gel of 100-grade. The fruits were shown to contain 15 combined amino acids. Glutamic acid, aspartic acid, and leucine comprised 28.25, 13.56, and 10.60% of the total amino acid content, respectively. 相似文献
60.
I. A. Kobbia E. F. Shabana Z. Khalil F. T. Zaki 《Water, air, and soil pollution》1991,60(1-2):107-116
Higher rates of the two organophosphorus Insecticides (dimethoate and dursban) induced severe drop in the dry weight gain of Nostoc muscorum and Anabaena oryzae. The fungicide karathane seemed to be inhibitory to the growth of Anabaena whereas all levels of the fungicide, except the two higher stimulated the growth of Nostoc. Trifluralin at all levels inhibited the growth of both organisms. However the magnitude of inhibition was always more pronounced in Anabaena. The lowest concentrations of dursban and dimethoate favored chlorophyll a synthesis in the cells of both cyanobacteria. Contrary to chlorophyll, total carotenoid accumulation was significantly suppressed. Moderate and higher doses of karathane and trifluralin increased chlorophyll a biosynthesis in Nostoc and to lesser extent in Anabaena, a phenomenon that was accompanied by significant increase in total carotenoid content. Glucose uptake by both organisms from media was accelerated following adminestration of all pesticides, an effect that was intensified with further increase in concentrations. Dimethoate and dursban favored the total carbohydrate accumulation in the cells of both organisms, whereas karathane and trifluralin accentuated the process, more prominently in Nostoc. 相似文献