全文获取类型
| 收费全文 | 2831篇 |
| 免费 | 287篇 |
专业分类
| 林业 | 23篇 |
| 农学 | 2篇 |
| 61篇 | |
| 综合类 | 84篇 |
| 农作物 | 9篇 |
| 水产渔业 | 47篇 |
| 畜牧兽医 | 2876篇 |
| 园艺 | 1篇 |
| 植物保护 | 15篇 |
出版年
| 2023年 | 58篇 |
| 2021年 | 12篇 |
| 2020年 | 105篇 |
| 2019年 | 9篇 |
| 2018年 | 72篇 |
| 2017年 | 84篇 |
| 2016年 | 62篇 |
| 2015年 | 77篇 |
| 2014年 | 113篇 |
| 2013年 | 120篇 |
| 2012年 | 89篇 |
| 2011年 | 104篇 |
| 2010年 | 83篇 |
| 2009年 | 112篇 |
| 2008年 | 88篇 |
| 2007年 | 71篇 |
| 2006年 | 58篇 |
| 2005年 | 46篇 |
| 2004年 | 82篇 |
| 2003年 | 70篇 |
| 2002年 | 85篇 |
| 2001年 | 71篇 |
| 2000年 | 59篇 |
| 1999年 | 76篇 |
| 1998年 | 106篇 |
| 1997年 | 105篇 |
| 1996年 | 82篇 |
| 1995年 | 87篇 |
| 1994年 | 75篇 |
| 1993年 | 93篇 |
| 1992年 | 105篇 |
| 1991年 | 85篇 |
| 1990年 | 95篇 |
| 1989年 | 81篇 |
| 1988年 | 75篇 |
| 1987年 | 79篇 |
| 1986年 | 39篇 |
| 1985年 | 52篇 |
| 1984年 | 40篇 |
| 1983年 | 49篇 |
| 1982年 | 20篇 |
| 1981年 | 4篇 |
| 1970年 | 2篇 |
| 1947年 | 2篇 |
| 1916年 | 3篇 |
| 1915年 | 2篇 |
| 1911年 | 4篇 |
| 1909年 | 2篇 |
| 1908年 | 3篇 |
| 1904年 | 2篇 |
排序方式： 共有3118条查询结果，搜索用时 31 毫秒
61.
Nutritional analysis and microbiological evaluation of commercially available enteral diets for cats 
下载免费PDF全文
下载免费PDF全文 62.
63.
Thromboelastographic evidence of inhibition of fibrinolysis after ε‐aminocaproic acid administration in a dog with suspected acute traumatic coagulopathy 下载免费PDF全文
下载免费PDF全文 64.
Comparison of 4 point‐of‐care blood gas analyzers for arterial blood gas analysis in healthy dogs and dogs with cardiopulmonary disease 下载免费PDF全文
下载免费PDF全文 65.
66.
67.
68.
69.
Kelling CL Hunsaker BD Steffen DJ Topliff CL Eskridge KM 《American journal of veterinary research》2007,68(7):788-796
OBJECTIVE: To evaluate protection resulting from use of a modified-live noncytopathic bovine viral diarrhea virus (BVDV) type 1 vaccine against systemic infection and clinical disease in calves challenged with type 2 BVDV. ANIMALS: 10 calves, 5 to 7 months of age. PROCEDURES: Calves were allocated (n = 5/group) to be nonvaccinated or vaccinated SC on day 0 with BVDV 1 (WRL strain). Calves in both groups were challenged intranasally with BVDV type 2 isolate 890 on day 21. Rectal temperatures and clinical signs of disease were recorded daily, and total and differential WBC and platelet counts were performed. Histologic examinations and immunohistochemical analyses to detect lesions and distribution of viral antigens, respectively, were performed. RESULTS: After challenge exposure to BVDV type 2, nonvaccinated calves developed high rectal temperatures, increased respiratory rates, viremia, leukopenia, lymphopenia, and infection of the thymus. Vaccinated calves did not develop high rectal temperatures or clinical signs of respiratory tract disease. Vaccinated calves appeared to be protected against systemic replication of virus in that they did not develop leukopenia, lymphopenia, viremia, or infection of target organs, and infectious virus was not detected in peripheral blood mononuclear cells or the thymus. CONCLUSIONS AND CLINICAL RELEVANCE: The modified-live BVDV type 1 vaccine protected against systemic infection and disease after experimental challenge exposure with BVDV type 2. The vaccine protected calves against infection and viremia and prevented infection of target lymphoid cells. 相似文献
70.