全文获取类型
| 收费全文 | 297篇 |
| 免费 | 26篇 |
| 国内免费 | 1篇 |
专业分类
| 林业 | 1篇 |
| 1篇 | |
| 综合类 | 26篇 |
| 畜牧兽医 | 293篇 |
| 植物保护 | 3篇 |
出版年
| 2020年 | 3篇 |
| 2019年 | 3篇 |
| 2018年 | 7篇 |
| 2017年 | 5篇 |
| 2016年 | 9篇 |
| 2015年 | 7篇 |
| 2014年 | 7篇 |
| 2013年 | 19篇 |
| 2012年 | 3篇 |
| 2011年 | 5篇 |
| 2010年 | 10篇 |
| 2009年 | 9篇 |
| 2008年 | 4篇 |
| 2007年 | 2篇 |
| 2006年 | 1篇 |
| 2005年 | 7篇 |
| 2004年 | 4篇 |
| 2003年 | 5篇 |
| 2002年 | 10篇 |
| 2001年 | 11篇 |
| 2000年 | 8篇 |
| 1999年 | 7篇 |
| 1998年 | 13篇 |
| 1997年 | 17篇 |
| 1996年 | 11篇 |
| 1995年 | 11篇 |
| 1994年 | 8篇 |
| 1993年 | 13篇 |
| 1992年 | 14篇 |
| 1991年 | 24篇 |
| 1990年 | 16篇 |
| 1989年 | 13篇 |
| 1988年 | 12篇 |
| 1987年 | 2篇 |
| 1985年 | 3篇 |
| 1984年 | 2篇 |
| 1982年 | 1篇 |
| 1981年 | 3篇 |
| 1980年 | 4篇 |
| 1979年 | 2篇 |
| 1978年 | 3篇 |
| 1977年 | 3篇 |
| 1976年 | 1篇 |
| 1933年 | 1篇 |
| 1901年 | 1篇 |
排序方式： 共有324条查询结果，搜索用时 31 毫秒
41.
Evidence of molecular heterogeneity for generalised glycogenosis between and within breeds of cattle 总被引：1，自引：0，他引：1
PJ HEALY PJ NICHOLLS F. MARTINIUK† S. TZALL† R. HIRSCHHORN† JMcC HOWELL† 《Australian veterinary journal》1995,72(8):309-311
SUMMARY Northern analyses revealed normal levels of acidic α-glucosidase mRNA in cultured fibroblasts from a Shorthorn calf affected with glycogenosis but a gross deficiency in an affected Brahman calf. Analyses of acidic α-glucosidase activity, relative to that of other lysosomal enzymes, in blood mononuclear cells revealed greater variation within and between Brahman herds than Shorthorn herds. A Msp1 restriction fragment length polymorphism associated with glycogenosis in Brahmans was not found in Shorthorns. These results are considered in relation to molecular heterogeneity for AAG deficiency in cattle and its implications for disease control programs. 相似文献
42.
Disease of geese caused by a new herpesvirus 总被引：3，自引：0，他引：3
PJ KETTERER BJ RODWELL HA WESTBURY† PT HOOPER† AR MACKENZIE‡ JG DINGLE§ HC PRIOR 《Australian veterinary journal》1990,67(12):446-448
A goose flock farmed outdoors in south-eastern Queensland suffered an outbreak of peracute disease with high death rate (97%). Small button ulcers and large plaques overlying lymphocyte aggregates were present on the mucosa of the small intestine of affected birds. Small white foci of necrosis and focal haemorrhages were seen in the livers. Numerous intranuclear inclusion bodies were observed microscopically in hepatocytes and a herpesvirus which grew rapidly in chicken kidney cells was isolated from tissues. Duck virus enteritis (DVE) was suspected but DVE antiserums failed to neutralise the virus. Further serological studies with a limited range of known avian herpesviruses have failed to identify the virus. Experimental transmission resulted in high mortality in geese (100%), lower mortality in ducklings and nil mortality in chickens. Surveillance studies showed no evidence of infection in domestic and wild birds beyond the original farm and the infection appears not to have been established in the area. Wild ducks, which were frequent visitors to the farm dam, were considered the most likely source of the infection. 相似文献
43.
44.
45.
46.
47.
This study concentrated on the histogenesis of bovine sympathetic ganglia, especially the development of the capsule, the interaction of sympathoblasts and supporting cells, and the ultrastructural detail of developing sympathoblasts. For this purpose 1st thoracic ganglia from 19 embryos and foetuses were collected and separated into 4 groups. The methods of study involved light and electron microscopy. From the study it was concluded that for neuronal development a functional interaction was necessary with satellite and Schwann cells, that the capsule had a role in maintaining neuronal homeostasis, and that sympathetic neurons displayed a number of morphologically distinct forms before reaching maturity. 相似文献
48.
49.
PJ CHENOWETH 《Australian veterinary journal》1994,71(12):422-426
SUMMARY Differences occur between female Bos indicus and Bos taurus cattle in various aspects of reproductive physiology and behaviour. These may be associated with different natural and human selection pressures, compounded by strong genotype-environment interactions. B indicus cattle are better adapted for tropical environments (despite overall poor cattle reproductive rates in these regions) which tend to be more stressful for B taurus genotypes. Conversely, B taurus cattle generally show superior reproductive and productive traits under more favoured, temperate conditions. Despite genotype-environment effects, B indicus females are generally considered to take longer to achieve puberty and to have longer gestation lengths, exhibit prolonged postpartum anoestrus, show greater seasonality of reproductive traits (tending to be long-day breeders), display a shorter, less overt oestrus as well as less tendency to allow riding behaviour by subordinate females. Some groups appear to have increased losses both during pregnancy and in the neonatal period. On the positive side, B indicus females respond well to managerial and nutritional interventions, tend to have greater reproductive longevity and they generally exhibit strong maternal traits. Culling of infertile females and selection for greater male scrotal circumference and sex-drive, in conjunction with the use of target weights, body condition scoring and weaning stratagems can improve reproductive rates in B indicus females. 相似文献
50.