全文获取类型
收费全文 | 510篇 |
免费 | 15篇 |
专业分类
林业 | 2篇 |
1篇 | |
畜牧兽医 | 522篇 |
出版年
2020年 | 7篇 |
2018年 | 5篇 |
2015年 | 8篇 |
2014年 | 12篇 |
2013年 | 104篇 |
2012年 | 16篇 |
2011年 | 26篇 |
2010年 | 11篇 |
2009年 | 14篇 |
2008年 | 9篇 |
2007年 | 10篇 |
2006年 | 7篇 |
2005年 | 13篇 |
2004年 | 4篇 |
2003年 | 4篇 |
2002年 | 12篇 |
2001年 | 10篇 |
2000年 | 8篇 |
1999年 | 9篇 |
1998年 | 11篇 |
1997年 | 10篇 |
1996年 | 10篇 |
1995年 | 8篇 |
1994年 | 8篇 |
1993年 | 7篇 |
1992年 | 9篇 |
1991年 | 3篇 |
1985年 | 4篇 |
1977年 | 7篇 |
1976年 | 14篇 |
1975年 | 9篇 |
1974年 | 23篇 |
1973年 | 9篇 |
1972年 | 14篇 |
1971年 | 8篇 |
1970年 | 11篇 |
1969年 | 5篇 |
1968年 | 8篇 |
1967年 | 6篇 |
1966年 | 3篇 |
1964年 | 3篇 |
1957年 | 2篇 |
1954年 | 2篇 |
1953年 | 3篇 |
1945年 | 2篇 |
1943年 | 2篇 |
1942年 | 2篇 |
1941年 | 3篇 |
1940年 | 6篇 |
1939年 | 3篇 |
排序方式: 共有525条查询结果,搜索用时 171 毫秒
501.
502.
S.R. McCLURE DVM T.S. TAYLOR DVM MS Diplomate ACVS C.M. HONNAS DVM Diplomate ACVS J. SCHUMACHER DVM MS Diplomate ACVS M.K. CHAFFIN DVM MS Diplomate ACVIM A.G. HOFFMAN DVM PhD 《Veterinary surgery : VS》1995,24(3):231-234
Permanent tracheal stomas were created in seven sedated, standing horses with severe upper airway obstruction. After local anesthesia, a 3-cm by 6-cm rectangle of skin was removed from the ventral surface of the neck, 3 cm distal to the cricoid cartilage. The sternothyrohyoideus muscles were clamped proximally and distally, then transected to expose the tracheal rings. The ventral third of four tracheal rings was dissected from the tracheal mucosa that was then incised in a double "Y." Two layers of suture were used to achieve mucocutaneous closure. Stomas healed without serious complications; two mares subsequently foaled, and three horses were used for riding. 相似文献
503.
504.
Simon R. Platt BVM&S Diplomate ACVIM Neurology Diplomate ECVN A. Rick Alleman DVM PhD Diplomate ABVP & ACVP Otto I. Lanz DVM Diplomate ACVS Cheryl L. Chrisman DVM EdS MS Diplomate ACVIM Neurology 《Veterinary surgery : VS》2002,31(1):65-69
OBJECTIVE: To compare the diagnoses obtained using fine-needle aspiration (FNA) and surgical-tissue biopsy of focal cerebral masses with the histologic diagnoses obtained via necropsy. STUDY DESIGN: A prospective case series. SAMPLE POPULATION: Ten client-owned adult dogs of various breeds. All dogs had clinical signs of cerebral disease and had a focal brain mass identified using magnetic resonance imaging; all were eventually euthanatized. METHODS: Immediately after euthanasia, the brains were removed en bloc from the cranial cavity. FNAs were obtained from each mass using a 22-gauge hypodermic needle and a 12-mL syringe. Cytologic preparations were made from each aspirate. A 14-gauge Tru-cut biopsy needle was used to obtain a core tissue sample from each mass. The biopsy specimens were fixed in 10% buffered formalin and submitted for histologic evaluation. The brains were similarly fixed and stained. Six-micrometer-thick transverse sections of the brain were examined microscopically. RESULTS: Neoplasia was confirmed in all dogs histologically in the 6-microm transverse sections. Four meningiomas, 2 astrocytomas, 2 oligodendrogliomas, 1 pituitary adenocarcinoma, and 1 neurofibrosarcoma were identified. FNA correctly identified all of the masses as neoplastic. Cytologic diagnoses correlated with the histologic interpretation in 5 of the masses (50%). Tru-cut biopsy specimens identified all 10 masses as neoplastic; in 9 of the 10 (90%), the diagnosis correlated with the histologic diagnosis. CONCLUSIONS AND CLINICAL RELEVANCE: FNA is a sensitive method that can be used to determine the presence of neoplasia in the brain, but is not as definitive as the Tru-cut biopsy in determining the specific type of cerebral neoplasm. 相似文献
505.
506.
507.
VACCINATION OF BULLS AGAINST BOVINE VIBRIOSIS 总被引:1,自引:0,他引:1
508.
509.
510.
Complete atrioventricular canal defect in a foal: Clinical and pathological features 总被引:1,自引:0,他引:1
Marc S. Kraus DVM Dipl ACVIM Romain Pariaut DMV Ana Alcaraz DVM PhD Dipl ACVP Anna R.M. Gelzer Dr med vet Dipl ACVIM Dipl ECVIM-CA Nina Malik DVM Shari Renaud-Farrell VT Mary Ellen Charter VT Philip R. Fox DVM MS Dipl ACVIM Dipl ECVIM-CA N. Sydney Moïse DVM MS Dipl ACVIM 《Journal of Veterinary Cardiology》2005,7(1):59-64
Atrioventricular (AV) canal defects comprise a rare category of congenital heart disease associated with abnormal development of the endocardial cushions. These anomalies include a broad spectrum of lesions involving the atrial septum primum, the inlet portion of the ventricular septum, and the atrioventricular valves. In severe cases heart failure may result. The present report describes cardiopulmonary findings in a six-week-old, female Thoroughbred foal with persistent tachypnea and tachycardia since birth. Clinical, echocardiographic, cardiac catheterization, and pathologic findings were compatible with complete AV canal defect with bi-directional shunting, congestive heart failure, and pulmonary hypertension. Gross cardiac pathologic findings included a large atrioventricular septal defect, a common atriovalvular orifice, five atrioventricular leaflets, with two free-floating bridging leaflets. Histopathologic lesions in the lung included hypertrophy of the pulmonary arteriolar walls due to thickening of the tunica media. This represents a well documented case of complete endocardial cushion defect with anomalous development of the atrioventricular valves and resultant pulmonary hypertension and heart failure. 相似文献