全文获取类型
收费全文 | 701篇 |
免费 | 21篇 |
国内免费 | 1篇 |
专业分类
林业 | 24篇 |
农学 | 12篇 |
基础科学 | 2篇 |
57篇 | |
综合类 | 111篇 |
农作物 | 30篇 |
水产渔业 | 20篇 |
畜牧兽医 | 431篇 |
园艺 | 12篇 |
植物保护 | 24篇 |
出版年
2021年 | 10篇 |
2019年 | 9篇 |
2017年 | 8篇 |
2016年 | 6篇 |
2013年 | 25篇 |
2012年 | 12篇 |
2011年 | 30篇 |
2010年 | 21篇 |
2009年 | 18篇 |
2008年 | 26篇 |
2007年 | 19篇 |
2006年 | 25篇 |
2005年 | 20篇 |
2004年 | 19篇 |
2003年 | 13篇 |
2002年 | 20篇 |
2001年 | 26篇 |
2000年 | 23篇 |
1999年 | 16篇 |
1998年 | 7篇 |
1997年 | 8篇 |
1995年 | 8篇 |
1994年 | 13篇 |
1993年 | 12篇 |
1992年 | 24篇 |
1991年 | 14篇 |
1990年 | 11篇 |
1989年 | 19篇 |
1988年 | 12篇 |
1987年 | 8篇 |
1986年 | 8篇 |
1985年 | 14篇 |
1984年 | 15篇 |
1983年 | 9篇 |
1982年 | 5篇 |
1981年 | 5篇 |
1980年 | 5篇 |
1979年 | 15篇 |
1978年 | 6篇 |
1977年 | 7篇 |
1976年 | 10篇 |
1975年 | 5篇 |
1974年 | 15篇 |
1973年 | 6篇 |
1972年 | 10篇 |
1971年 | 11篇 |
1970年 | 10篇 |
1969年 | 8篇 |
1967年 | 7篇 |
1966年 | 6篇 |
排序方式: 共有723条查询结果,搜索用时 31 毫秒
1.
2.
Aerobic bacterial populations were studied on the distal hair coat and at the skin surface of the shoulder, rump and abdomen of 10 healthy dogs. Coagulase negative staphylococci (CNS) were more frequently isolated from the hair than the skin at the shoulder and rump. There was no difference in the isolation rate of coagulase positive staphylococci (CPS) (Staphylococcus intermedius) between the hair and skin. Total skin counts were greatest on the abdomen whereas CNS counts from the hair were least at this site. There were no differences between CPS counts at the three sites on either hair or skin. The populations on the relatively unfavourable microenvironment of the distal hair may represent contamination rather than colonisation. The low populations of CPS at the skin surface also indicate contamination or transient colonisation rather than true resident status. 相似文献
3.
Evaluation of the long-acting somatostatin analogue Octreotide in the management of insulinoma in three dogs 总被引:1,自引:0,他引:1
K. W. Simpson R. L. Stepien C. M. Elwood A. Boswood C. R. Vaillant 《The Journal of small animal practice》1995,36(4):161-165
The response of dogs with insulinoma to surgical and medical management is variable, with the majority developing intractable hypoglycaemia. A long-acting somatostatin analogue, Octreotide (SMS 201–995; Sandostatin) has been useful in the management of hypoglycaemia in humans with insulinoma, and preliminary reports suggest a beneficial clinical response in dogs with insulinoma. The present study objectively evaluated Octreotide in the management of three dogs with immunohistochemically confirmed insulinoma. Octreotide had no benefit over placebo, and little effect on circulating glucose and insulin concentrations despite clearly detectable plasma concentrations of Octreotide. No clinical improvement was apparent in two dogs given Octreotide over a period of two and three weeks. These results contrast with the positive clinical responses noted previously and indicate that further placebo controlled, objective studies are necessary before clear statements on the treatment of insulinoma with Octreotide are made. 相似文献
4.
Gonadotrophin-releasing hormone treatment in cattle: a meta-analysis of the effects on conception at the time of insemination 总被引:1,自引:0,他引:1
SUMMARY Data from 40 trials described in 27 published papers were analysed by meta-analysis (pooling of data from numerous trials into a single analysis) to evaluate the effects of injecting gonadotrophin-releasing hormone (GnRH) In cattle at the time of Insemination on the risk of pregnancy. A total of 19 019 cows were involved In these studies. Analyses were stratified by trial and by the effects of dose of GnRH, type of GnRH and Insemination number (first, second or third and greater). Mantel-Haenszel analysis revealed that use of GnRH at Insemination significantly Increased the overall risk of pregnancy by 12.5% In treated cows (P < 0.05). However, Increases In risk of pregnancy were greatest (22.5%) when repeat breeders were treated. Results for use of GnRH or analogue at first service were similar, with Increased risks of pregnancy in treated cows of 5.2 and 8.0%, respectively. The risk of pregnancy tended to be higher (11.1%) when the dose of GnRH was 250 μg and when used at second Insemination (9.9%). The analyses demonstrated that while treatment at Insemination with GnRH and GnRH analogues Increased conception rates In dairy cattle, some variation In study results was attributable to the number of Inseminations after calving at which GnRH Is administered. Further efforts should be made to determine characteristics of populations of cows that have good fertility responses to GnRH and to determine the mode of action of GnRH in Increasing fertility. Meta-analysis proved to be a useful technique for evaluating the apparently conflicting results from trials and in evaluating the effect of factors such as Insemination number, dose and type of GnRH on responses to treatment. 相似文献
5.
Gastro-oesophageal reflux together with sliding hiatus hernia is reported in a dog, associated with laryngeal paralysis. Diagnosis was made following endoscopy and fluoroscopy. Surgical treatment of the laryngeal paralysis resulted in complete remission of clinical signs. 相似文献
6.
7.
8.
Evaluating the effect of metronidazole plus amoxicillin‐clavulanate versus amoxicillin‐clavulanate alone in canine haemorrhagic diarrhoea: a randomised controlled trial in primary care practice
下载免费PDF全文
![点击此处可从《The Journal of small animal practice》网站下载免费的PDF全文](/ch/ext_images/free.gif)
9.
10.