全文获取类型
| 收费全文 | 2943篇 |
| 免费 | 290篇 |
专业分类
| 林业 | 43篇 |
| 农学 | 7篇 |
| 基础科学 | 3篇 |
| 80篇 | |
| 综合类 | 24篇 |
| 农作物 | 33篇 |
| 水产渔业 | 96篇 |
| 畜牧兽医 | 2887篇 |
| 园艺 | 4篇 |
| 植物保护 | 56篇 |
出版年
| 2024年 | 2篇 |
| 2023年 | 61篇 |
| 2022年 | 16篇 |
| 2021年 | 29篇 |
| 2020年 | 123篇 |
| 2019年 | 37篇 |
| 2018年 | 97篇 |
| 2017年 | 96篇 |
| 2016年 | 77篇 |
| 2015年 | 87篇 |
| 2014年 | 140篇 |
| 2013年 | 153篇 |
| 2012年 | 122篇 |
| 2011年 | 128篇 |
| 2010年 | 99篇 |
| 2009年 | 104篇 |
| 2008年 | 90篇 |
| 2007年 | 63篇 |
| 2006年 | 46篇 |
| 2005年 | 41篇 |
| 2004年 | 67篇 |
| 2003年 | 67篇 |
| 2002年 | 72篇 |
| 2001年 | 66篇 |
| 2000年 | 61篇 |
| 1999年 | 71篇 |
| 1998年 | 103篇 |
| 1997年 | 103篇 |
| 1996年 | 80篇 |
| 1995年 | 79篇 |
| 1994年 | 71篇 |
| 1993年 | 89篇 |
| 1992年 | 106篇 |
| 1991年 | 85篇 |
| 1990年 | 91篇 |
| 1989年 | 78篇 |
| 1988年 | 69篇 |
| 1987年 | 76篇 |
| 1986年 | 34篇 |
| 1985年 | 48篇 |
| 1984年 | 34篇 |
| 1983年 | 49篇 |
| 1982年 | 18篇 |
| 1981年 | 1篇 |
| 1980年 | 2篇 |
| 1978年 | 1篇 |
| 1977年 | 1篇 |
排序方式： 共有3233条查询结果，搜索用时 15 毫秒
71.
Maria Clia Ramos Bellenzani PhD Associate Professor Júlia Maria D'andrea Greve PhD Professor-Physiatrics Csar Augusto Martins Pereira 《Journal of Equine Veterinary Science》2007,27(11):475-480
Horseshoeing is a common practice, but effects on the hoof wall are poorly understood. Strain gauges were used to document and compare hoof behavior in vitro during flat weight bearing and after artificial heel elevation. Ten front limbs of Thoroughbred race horses, shod with conventional flat shoes, were used. Eight strain gauges were symmetrically distributed around the toe, quarters, and heels. Each limb was mounted to a testing machine (Kratos K5002; Kratos Dynamômetros, Ltda., Cotia-SP-Brazil) and subjected to a load equivalent to 30% of the donor's body weight. Strains (μ) were acquired by means of a computerized system and the results compared using Friedman and Wilcoxon statistical tests. There was greater strain variation when the heels were elevated. Compression predominated during flat weight bearing, with a tendency to horizontal traction after heel elevation. The changes in strain caused by heel elevation were not always symmetrical. Elevation of the heels tensed the toe and the medial quarter horizontally, increased load at the posterior portion of the hoof capsule, and hindered its expansion. 相似文献
72.
73.
74.
75.
76.
77.
78.
M. Ryan Smith DVM DACVECC Virginie A. Wurlod MS Dr vet med DACVECC DECVECC Chin-Chi Liu MS MApStat PhD 《Journal of Veterinary Emergency and Critical Care》2023,33(6):648-655
Objective
To describe hemostatic derangements associated with canine anaphylaxis and to assess for association with syndrome severity.Design
Prospective observational study.Setting
University teaching hospital.Animals
Twenty-seven client-owned dogs, recruited from November 2018 to January 2022, diagnosed with anaphylaxis of varying severity were included. Study inclusion required presentation <6 hours after initiation of clinical signs, no medications or history of illness within the prior 2 weeks, lack of comorbidities expected to affect hemostasis, and lack of a disease state that could alternatively explain the clinical presentation.Interventions
Blood samples were collected within the first hour of presentation for CBC, serum biochemistry, prothrombin time (PT), activated partial thromboplastin time (aPTT), and viscoelastic coagulation testing for use with a cartridge-based point-of-care device.Measurements and main results
Clotting time and clot formation time were prolonged, alpha angle and maximum clot firmness were decreased, PT and aPTT were prolonged, and platelet counts were lower in severe cases compared to mild and moderate cases. There were no differences for any parameter between mild and moderate cases. The presence or absence of abdominal effusion was not associated with hemostatic status.Conclusions
Global hemostatic derangements consistent with hypocoagulability are a prominent feature of severe anaphylaxis in dogs and should be considered for routine evaluation. 相似文献79.