全文获取类型
收费全文 | 189篇 |
免费 | 13篇 |
专业分类
林业 | 9篇 |
农学 | 3篇 |
12篇 | |
综合类 | 41篇 |
农作物 | 3篇 |
畜牧兽医 | 116篇 |
园艺 | 1篇 |
植物保护 | 17篇 |
出版年
2023年 | 2篇 |
2020年 | 2篇 |
2019年 | 3篇 |
2018年 | 3篇 |
2016年 | 4篇 |
2015年 | 3篇 |
2014年 | 2篇 |
2013年 | 8篇 |
2012年 | 6篇 |
2011年 | 7篇 |
2010年 | 4篇 |
2009年 | 13篇 |
2008年 | 8篇 |
2007年 | 3篇 |
2006年 | 3篇 |
2005年 | 3篇 |
2004年 | 6篇 |
2003年 | 3篇 |
2002年 | 5篇 |
2000年 | 3篇 |
1999年 | 10篇 |
1998年 | 16篇 |
1997年 | 6篇 |
1996年 | 9篇 |
1995年 | 9篇 |
1993年 | 5篇 |
1992年 | 6篇 |
1991年 | 3篇 |
1990年 | 6篇 |
1989年 | 4篇 |
1988年 | 2篇 |
1986年 | 2篇 |
1974年 | 1篇 |
1973年 | 1篇 |
1970年 | 1篇 |
1966年 | 1篇 |
1960年 | 3篇 |
1958年 | 1篇 |
1957年 | 1篇 |
1948年 | 1篇 |
1942年 | 1篇 |
1935年 | 1篇 |
1931年 | 2篇 |
1921年 | 2篇 |
1920年 | 1篇 |
1917年 | 2篇 |
1916年 | 1篇 |
1915年 | 1篇 |
1914年 | 2篇 |
1893年 | 1篇 |
排序方式: 共有202条查询结果,搜索用时 7 毫秒
51.
Christopher P. Cook Danny W. Scott William H. Miller Jr. J. Edward Kirker Shaun M. Cobb 《The Canadian veterinary journal. La revue veterinaire canadienne》2004,45(5):414-417
Cetirizine and placebo were administered orally as individual agents to 23 dogs with atopic dermatitis. The pruritus was satisfactorily reduced in 4/22 (18%) dogs that completed the trial with cetirizine. Two dogs vomited after administration of the active drug. 相似文献
52.
Cobb SP Hogg RA Challoner DJ Brett MM Livesey CT Sharpe RT Jones TO 《The Veterinary record》2002,150(1):5-8
A large outbreak of suspected botulism occurred on a dairy farm. The affected animals were listless and showed signs ranging from hindlimb unsteadiness to lateral recumbency, although the most common presentation was sternal recumbency with an apparent hindlimb weakness when stimulated to rise. Postmortem examinations revealed no conclusive gross pathology or histopathology. The affected cattle were found to have neutrophilia and hyperglycaemia with no other consistent haematological or biochemical abnormalities. The combination of clinical signs, disease epidemiology and the ruling out of other differential diagnoses strongly supported a diagnosis of unconfirmed botulism; however, the source of toxin was not demonstrated. Botulism is a severe disease in human beings and there are uncertainties about the pharmacokinetics and pharmacodynamics of Clostridium botulinum toxins. In such circumstances, a precautionary approach to food safety is essential. Restrictions were placed on the movement of livestock and sale of milk from the farm premises until 14 days after the onset of the last clinical case. 相似文献
53.
54.
S Saifzadeh R Hobbenaghi S Asri‐Rezaei F Shokouhi SJ B Dalir‐Naghadeh M Rohi S 《Reproduction in domestic animals》2008,43(6):678-684
A novel technique [Section‐Ligation‐Release (SLR)] was evaluated for castration in the horse. Clinical traits, serum testosterone concentrations after challenge with human chorionic gonadotrophin (hCG), and histopathological changes of the testicular tissue were assessed. Five stallions, aged 24–48 months, were castrated using SLR technique under general anaesthesia. Both spermatic cords in each stallion were exposed at the scrotal neck by two 5‐cm long incisions, followed by sharp dissection through the parietal vaginal tunic. Both vascular and non‐vascular structures in the cords were triple clamped, transected and ligated. Both testes were left in situ. Serum testosterone concentrations were measured pre‐operatively and at 2 months after castration following IV administration of 1 × 104 IU of hCG. Both testes from each castrate were collected at 2 months for histopathologic examination. SLR castration was successfully achieved. Moderated scrotal and preputial swelling was the only experienced short‐term complication. Serum testosterone concentrations were significantly lower than basal pre‐operative levels at 2 months after castration, and did not respond to hCG. On histopathology, hyalinization of the seminiferous tubules and loss of testicular interstitial tissue were indicative of complete avascular necrosis. This novel primary closure castration technique of stallion is a simple practical method, with minimal post‐operative complications; and could be safely advocated as an alternative to the traditional castration techniques allowing for second intention healing of scrotal wounds. 相似文献
55.
56.
57.
58.
S. E. Brownlie M. A. Cobb J. Chambers G. Jackson S. Thomas† 《The Journal of small animal practice》1991,32(4):165-169
Four young dogs with severe pulmonic stenosis were treated by percutaneous balloon valvuloplasty. Pressure gradients between the right ventricle and pulmonary artery were markedly reduced by the procedure resulting in dramatic improvements in growth rate and clinical condition. No postoperative problems were encountered. 相似文献
59.
60.