全文获取类型
| 收费全文 | 1259篇 |
| 免费 | 79篇 |
| 国内免费 | 1篇 |
专业分类
| 林业 | 37篇 |
| 农学 | 19篇 |
| 基础科学 | 15篇 |
| 146篇 | |
| 综合类 | 178篇 |
| 农作物 | 23篇 |
| 水产渔业 | 76篇 |
| 畜牧兽医 | 763篇 |
| 园艺 | 7篇 |
| 植物保护 | 75篇 |
出版年
| 2020年 | 12篇 |
| 2019年 | 26篇 |
| 2018年 | 26篇 |
| 2017年 | 23篇 |
| 2016年 | 18篇 |
| 2015年 | 24篇 |
| 2014年 | 18篇 |
| 2013年 | 46篇 |
| 2012年 | 38篇 |
| 2011年 | 48篇 |
| 2010年 | 43篇 |
| 2009年 | 24篇 |
| 2008年 | 38篇 |
| 2007年 | 43篇 |
| 2006年 | 44篇 |
| 2005年 | 39篇 |
| 2004年 | 32篇 |
| 2003年 | 31篇 |
| 2002年 | 22篇 |
| 2001年 | 34篇 |
| 2000年 | 25篇 |
| 1999年 | 33篇 |
| 1998年 | 21篇 |
| 1997年 | 19篇 |
| 1996年 | 21篇 |
| 1995年 | 23篇 |
| 1994年 | 13篇 |
| 1992年 | 22篇 |
| 1991年 | 35篇 |
| 1990年 | 30篇 |
| 1989年 | 18篇 |
| 1988年 | 20篇 |
| 1987年 | 26篇 |
| 1986年 | 15篇 |
| 1985年 | 30篇 |
| 1984年 | 21篇 |
| 1983年 | 17篇 |
| 1982年 | 14篇 |
| 1981年 | 15篇 |
| 1980年 | 14篇 |
| 1979年 | 14篇 |
| 1978年 | 14篇 |
| 1977年 | 19篇 |
| 1974年 | 10篇 |
| 1973年 | 25篇 |
| 1972年 | 19篇 |
| 1971年 | 13篇 |
| 1969年 | 10篇 |
| 1967年 | 11篇 |
| 1966年 | 15篇 |
排序方式： 共有1339条查询结果，搜索用时 15 毫秒
971.
Effect of otic medications containing glucocorticoids on liver function test results in healthy dogs 总被引：1，自引：0，他引：1
D J Meyer K A Moriello B M Feder S L Fehrer-Sawyer A K Maxwell 《Journal of the American Veterinary Medical Association》1990,196(5):743-744
Otic medications containing triamcinolone or dexamethasone were administered twice daily for 21 days to 2 groups of 4 healthy dogs each. Serum alkaline phosphatase, gamma-glutamyltransferase, alanine transaminase, and aspartate transaminase activities, and serum bile acid and lipoprotein-X concentrations were assayed for 35 days. Increased serum activities for gamma-glutamyltransferase, alkaline phosphatase, and alanine transaminase were detected by day 7 and peaked at day 21. Increases were greater in dogs given the dexamethasone-containing medication. Enzyme activity returned to baseline by day 35. Serum aspartate transaminase activity and bile acid and lipoprotein-X concentrations did not increase. 相似文献
972.
973.
974.
975.
976.
977.
Studies on a canine intestinal spirochete. I. Its isolation, cultivation and ultrastructure. 总被引：2，自引：0，他引：2 
下载免费PDF全文
下载免费PDF全文 The microscopic examination of colonic scrapings from 12 of 18 normal dogs revealed the presence of a spirochete. From two such dogs a spirochete was isolated and successfully cultured. Although similar in outward appearance to the porcine spirochete of swine dysentery the canine spirochete possessed ultrastructural properties which distinguished it from the porcine agent. This canine agent is thought to constitute a separate species and should not be confused with the agent associated with swine dysentery. 相似文献
978.
HOWARD M. HAYES JR 《The Journal of small animal practice》1975,16(1-12):337-343
Of 250, 000 dogs seen by twelve United States and Canadian veterinary-college hospital/clinics, seventy-three dogs were identified with chemo-dectomas. The Boxer and Boston Terrier breeds had significantly higher risk for the tumour than all breeds combined; excessive risk was detected in all male dogs combined and in male dogs 10 years of age and older- especially in Boston Terriers. A familial predisposition aggravated by chronic hypoxia are suggested as possible aetiological factors responsible for the excessive risk in bulldog breeds. 相似文献
979.
Twenty-eight known or hypothesized variables in the epidemiology of bovine brucellosis were examined by path analysis to determine the contribution of each variable to seropositivity of cattle in Mexicali, Mexico. The variables that contributed significantly to bovine seropositivity were area size of farm premises, percentage of animals on a premises that were inseminated artificially, local marketing of the products from a premises, size of investment in the livestock, whether or not dairying was the major agricultural activity of the premises, and the policy of the owner or manager with regard to disposal of reactor animals. The contributions of all other variables were insignificant. 相似文献
980.