全文获取类型
收费全文 | 11071篇 |
免费 | 573篇 |
国内免费 | 8篇 |
专业分类
林业 | 1500篇 |
农学 | 367篇 |
基础科学 | 61篇 |
2468篇 | |
综合类 | 1237篇 |
农作物 | 387篇 |
水产渔业 | 538篇 |
畜牧兽医 | 3995篇 |
园艺 | 286篇 |
植物保护 | 813篇 |
出版年
2023年 | 58篇 |
2022年 | 83篇 |
2021年 | 173篇 |
2020年 | 185篇 |
2019年 | 176篇 |
2018年 | 287篇 |
2017年 | 298篇 |
2016年 | 283篇 |
2015年 | 222篇 |
2014年 | 288篇 |
2013年 | 624篇 |
2012年 | 626篇 |
2011年 | 724篇 |
2010年 | 402篇 |
2009年 | 343篇 |
2008年 | 605篇 |
2007年 | 643篇 |
2006年 | 648篇 |
2005年 | 604篇 |
2004年 | 556篇 |
2003年 | 549篇 |
2002年 | 507篇 |
2001年 | 251篇 |
2000年 | 241篇 |
1999年 | 191篇 |
1998年 | 100篇 |
1997年 | 90篇 |
1996年 | 94篇 |
1995年 | 114篇 |
1994年 | 69篇 |
1993年 | 66篇 |
1992年 | 62篇 |
1991年 | 58篇 |
1990年 | 68篇 |
1989年 | 68篇 |
1988年 | 64篇 |
1987年 | 43篇 |
1986年 | 51篇 |
1985年 | 65篇 |
1984年 | 46篇 |
1983年 | 57篇 |
1982年 | 35篇 |
1980年 | 46篇 |
1979年 | 29篇 |
1978年 | 33篇 |
1977年 | 42篇 |
1976年 | 27篇 |
1974年 | 25篇 |
1973年 | 36篇 |
1972年 | 27篇 |
排序方式: 共有10000条查询结果,搜索用时 140 毫秒
91.
Effects of extracerebral dopamine on salsolinol‐ or thyrotropin‐releasing hormone‐induced prolactin (PRL) secretion in goats 下载免费PDF全文
Yuki Inaba Yuki Kato Azumi Itou Aoi Chiba Ken Sawai Ferenc Fülöp György Miklos Nagy Tsutomu Hashizume 《Animal Science Journal》2016,87(12):1522-1527
The aim of the present study was to clarify the effect of extracerebral dopamine (DA) on salsolinol (SAL)‐induced prolactin (PRL) secretion in goats. An intravenous injection of SAL or thyrotropin‐releasing hormone (TRH) was given to female goats before and after treatment with an extracerebral DA receptor antagonist, domperidone (DOM), and the PRL‐releasing response to SAL was compared with that to TRH. DOM alone increased plasma PRL concentrations and the PRL‐releasing response to DOM alone was greater than that to either SAL alone or TRH alone. The PRL‐releasing response to DOM plus SAL was similar to that to DOM alone, and no additive effect of DOM and SAL on the secretion of PRL was observed. In contrast, the PRL‐releasing response to DOM plus TRH was greater than that to either TRH alone or DOM alone and DOM synergistically increased TRH‐induced PRL secretion. The present results demonstrate that the mechanism involved in PRL secretion by SAL differs from that by TRH, and suggest that the extracerebral DA might be associated in part with the modulation of SAL‐induced PRL secretion in goats. 相似文献
92.
93.
94.
95.
96.
97.
M. Podell H.A. Volk M. Berendt W. Löscher K. Muñana E.E. Patterson S.R. Platt 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2016,30(2):477-490
This report represents a scientific and working clinical consensus statement on seizure management in dogs based on current literature and clinical expertise. The goal was to establish guidelines for a predetermined, concise, and logical sequential approach to chronic seizure management starting with seizure identification and diagnosis (not included in this report), reviewing decision‐making, treatment strategies, focusing on issues related to chronic antiepileptic drug treatment response and monitoring, and guidelines to enhance patient response and quality of life. Ultimately, we hope to provide a foundation for ongoing and future clinical epilepsy research in veterinary medicine. 相似文献
98.
Breeding Restrictions Decrease the Prevalence of Myxomatous Mitral Valve Disease in Cavalier King Charles Spaniels over an 8‐ to 10‐Year Period 下载免费PDF全文
99.
Effect of the Glucagon‐like Peptide‐1 Analogue Exenatide Extended Release in Cats with Newly Diagnosed Diabetes Mellitus 下载免费PDF全文
100.
Effect of Pimobendan in Dogs with Preclinical Myxomatous Mitral Valve Disease and Cardiomegaly: The EPIC Study—A Randomized Clinical Trial 下载免费PDF全文
A. Boswood J. Häggström S.G. Gordon G. Wess R.L. Stepien M.A. Oyama B.W. Keene J. Bonagura K.A. MacDonald M. Patteson S. Smith P.R. Fox K. Sanderson R. Woolley V. Szatmári P. Menaut W.M. Church M. L. O'Sullivan J.‐P. Jaudon J.‐G. Kresken J. Rush K.A. Barrett S.L. Rosenthal A.B. Saunders I. Ljungvall M. Deinert E. Bomassi A.H. Estrada M.J. Fernandez Del Palacio N.S. Moise J.A. Abbott Y. Fujii A. Spier M.W. Luethy R.A. Santilli M. Uechi A. Tidholm P. Watson 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2016,30(6):1765-1779