全文获取类型
| 收费全文 | 240篇 |
| 免费 | 1篇 |
专业分类
| 农学 | 7篇 |
| 9篇 | |
| 综合类 | 23篇 |
| 农作物 | 7篇 |
| 水产渔业 | 19篇 |
| 畜牧兽医 | 150篇 |
| 植物保护 | 26篇 |
出版年
| 2019年 | 1篇 |
| 2013年 | 2篇 |
| 2011年 | 7篇 |
| 2010年 | 7篇 |
| 2009年 | 12篇 |
| 2008年 | 5篇 |
| 2007年 | 2篇 |
| 2006年 | 3篇 |
| 2005年 | 2篇 |
| 1998年 | 2篇 |
| 1997年 | 4篇 |
| 1996年 | 11篇 |
| 1995年 | 9篇 |
| 1994年 | 8篇 |
| 1993年 | 7篇 |
| 1992年 | 8篇 |
| 1991年 | 6篇 |
| 1990年 | 5篇 |
| 1989年 | 4篇 |
| 1988年 | 11篇 |
| 1987年 | 7篇 |
| 1986年 | 7篇 |
| 1985年 | 8篇 |
| 1984年 | 6篇 |
| 1983年 | 8篇 |
| 1982年 | 5篇 |
| 1981年 | 2篇 |
| 1980年 | 4篇 |
| 1979年 | 4篇 |
| 1978年 | 3篇 |
| 1977年 | 1篇 |
| 1976年 | 5篇 |
| 1975年 | 1篇 |
| 1974年 | 1篇 |
| 1973年 | 5篇 |
| 1971年 | 1篇 |
| 1963年 | 1篇 |
| 1961年 | 1篇 |
| 1960年 | 2篇 |
| 1959年 | 3篇 |
| 1958年 | 4篇 |
| 1957年 | 5篇 |
| 1956年 | 6篇 |
| 1955年 | 5篇 |
| 1954年 | 10篇 |
| 1953年 | 6篇 |
| 1952年 | 1篇 |
| 1948年 | 7篇 |
| 1947年 | 2篇 |
| 1946年 | 3篇 |
排序方式： 共有241条查询结果，搜索用时 15 毫秒
51.
An enzyme-linked immunosorbent assay (ELISA) was developed to measure total antibody to Toxoplasma gondii in serum samples from macropods. The validity of the assay was established by comparing parasite isolation in mice for 17 Tasmanian pademelons (Thylogale billardierii) and 17 Bennett's wallabies (Macropus rufogriseus rufogriseus). The ELISA was then used to detect antibody against T. gondii in serum from 236 macropods, collected from 21 locations in Tasmania, including Flinders Island. Antibody against T. gondii was detected in 20 animals (15 T. billardierii and 5 M. rufogriseus). There was a significant (p less than 0.01) difference in possession of T. gondii antibodies between adult (greater than or equal to 1 year of age) Tasmanian pademelons and Bennett's wallabies. 相似文献
52.
MERRILL L. JOHNSON 《Growth and change》1988,19(2):56-74
This study focuses on the location of electrical machinery manufacturing in South Carolina, Georgia, Mississippi, and Alabama (with special attention given to the first three states), and the degree to which this industry is associated with labor environments attractive to firms in the late stage of the product cycle. Labor-environment variables were selected from published sources and then collapsed into principal components. County-level component scores were then correlated with selected electrical machinery employment variables. The analysis suggests that, with the possible exception of electronic components manufacturing, there has been no widespread locational response by electrical machinery manufacturing in these states to labor environments attractive to firms in the late stage of the product cycle. 相似文献
53.
VICTORIA M. LUKASIK DVM PAULA F. MOON DVM Diplomate ACVA 《Veterinary surgery : VS》1996,25(4):356-360
This case report describes pneumothorax associated with positive pressure ventilation in two Vietnamese potbellied pigs while under general anesthesia. A discussion of possible causes and barotrauma/volutrauma follows. The cause of pneumothorax in both cases was probably an interaction of intermittent positive pressure ventilation with some factor unique to these two pigs. 相似文献
54.
K. A. JOHNSON D. B. CHURCH R. J. BARTON A. K. W. WOOD 《The Journal of small animal practice》1988,29(10):657-666
Rickets diagnosed in a 12-week-old female St Bernard was attributed to an inborn error in vitamin D metabolism. Radiographically the physes were enlarged radially and axially, and metaphyseal bone adjacent to the physes was widened and cup-shaped. Serum biochemical abnormalities were hypocalcaemia, hypomagnesaemia, and hyperparathyroidism. Treatment was given with dihydrotachysterol, a synthetic sterol that is metabolised to a pharmacologically active analogue of 1,25 dihydroxycholecalciferol by the liver. This resolved the rachitic skeletal lesions completely in six weeks, as assessed radiographically, and maintained the serum calcium at the lower end of the normal range. 相似文献
55.
56.
57.
58.
59.
60.