全文获取类型
收费全文 | 5470篇 |
免费 | 504篇 |
专业分类
林业 | 10篇 |
农学 | 6篇 |
21篇 | |
综合类 | 11篇 |
农作物 | 10篇 |
水产渔业 | 82篇 |
畜牧兽医 | 5800篇 |
园艺 | 3篇 |
植物保护 | 31篇 |
出版年
2024年 | 7篇 |
2023年 | 91篇 |
2022年 | 12篇 |
2021年 | 10篇 |
2020年 | 174篇 |
2019年 | 12篇 |
2018年 | 131篇 |
2017年 | 141篇 |
2016年 | 93篇 |
2015年 | 160篇 |
2014年 | 245篇 |
2013年 | 269篇 |
2012年 | 210篇 |
2011年 | 252篇 |
2010年 | 170篇 |
2009年 | 256篇 |
2008年 | 183篇 |
2007年 | 122篇 |
2006年 | 118篇 |
2005年 | 103篇 |
2004年 | 164篇 |
2003年 | 168篇 |
2002年 | 182篇 |
2001年 | 177篇 |
2000年 | 131篇 |
1999年 | 127篇 |
1998年 | 173篇 |
1997年 | 179篇 |
1996年 | 158篇 |
1995年 | 159篇 |
1994年 | 139篇 |
1993年 | 150篇 |
1992年 | 179篇 |
1991年 | 149篇 |
1990年 | 189篇 |
1989年 | 136篇 |
1988年 | 114篇 |
1987年 | 149篇 |
1986年 | 59篇 |
1985年 | 88篇 |
1984年 | 87篇 |
1983年 | 80篇 |
1982年 | 35篇 |
1981年 | 11篇 |
1980年 | 5篇 |
1979年 | 3篇 |
1978年 | 2篇 |
1977年 | 9篇 |
1976年 | 2篇 |
1975年 | 5篇 |
排序方式: 共有5974条查询结果,搜索用时 15 毫秒
81.
82.
Rodney L. Page DVM MS Margaret C. McEntee DVM Steven L. George PhD Patrick L. Williams PhD Greta L. Heidner DVM Carol A. Novotney DVM Jim E. Riviere DVM PhD Mark W. Dewhirst DVM PhD Donald E. Thrall DVM PhD 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》1993,7(4):235-240
Thirty dogs with spontaneously occurring malignant neoplasms were treated monthly with carboplatin (CBDCA) given as a 30-minute intravenous infusion in a dose escalation study. Twenty-eight dogs were considered evaluable for toxicity. The maximally tolerated dose of CBDCA was conceptually defined as that dose, determined by logistic regression analyses of toxicity data, resulting in a 50% incidence of moderate toxicity (MOD50) or a 5% incidence of severe toxicity (SEV5). Each designated maximally tolerated dose was calculated for the first course of treatment only and for the first and second courses of treatment combined to estimate cumulative drug toxicity. The MOD50 and SEV5 for the first treatment course were 340 and 278 mg/M2, respectively. MOD50 and SEV5 values for the first plus second treatment courses were 327 and 231 mg/M2, respectively. The nadir of neutrophil and platelet counts occurred approximately 14 days after treatment. The mean neutrophil and platelet values for all dogs experiencing myelosuppression during the first two treatment courses were 1541/μL and 62,600/μL, respectively. Nonparametric pharmacokinetic analysis of plasma CBDCA values suggested that half-life (T1/2), area-under-the-curve and total body clearance (CLb) were not dose dependent. Volume of distribution (VDss) significantly increased with dose only between 100 and 150 mg/M2, not between 150 and 300 mg/M2. Dose-independent serum CBDCA pharmacokinetic disposition indicates that detailed investigation of tissue CBDCA distribution would be warranted and may identify novel dosing strategies that could improve the therapeutic index of CBDCA by minimizing toxicity. (Journal of Veterinary Internal Medicine 1993; 7:235–240. Copyright © 1993 by the American College of Veterinary Internal Medicine.) 相似文献
83.
84.
85.
86.
87.
Retrospective evaluation of the effect of high flow oxygen therapy delivered by nasal cannula on PaO2 in dogs with moderate‐to‐severe hypoxemia 下载免费PDF全文
88.
Ookawa K Mochizuki K Sugimoto Y Suzuki T Hashizume M Kitagawa T Matumoto T Ito C Yokogoshi H 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2007,69(1):49-54
Lipid extracted from the ovary of skipjack tuna by the method that we developed is rich in phospholipid-type docosahexaenoic acid. The ovary lipid of skipjack tuna (OLS) was studied for its anti-stress activity in male Wistar rats, focusing on stress-related blood components: recovery from stress was examined after application of water immersion restraint stress. As a result, serum corticosterone (CORT) secretion was inhibited and decreased rapidly after stress application in rats given OLS compared with control rats. As CORT acts as a glucocorticoid, non-esterified fatty acid (NEFA) is expected to increase by stress application. However, the concentration tended to be lower in rats given OLS than in control rats. With respect to OLS concentration, OLS increased serum dehydroepiandrosterone, secretion concentration-dependently. In addition, as with the recovery study, it tended to inhibit the increase in NEFA. These results indicate that OLS may have an anti-stress activity against acute stress. 相似文献
89.
90.