全文获取类型
收费全文 | 3586篇 |
免费 | 287篇 |
国内免费 | 1篇 |
专业分类
林业 | 54篇 |
农学 | 48篇 |
基础科学 | 7篇 |
208篇 | |
综合类 | 77篇 |
农作物 | 165篇 |
水产渔业 | 105篇 |
畜牧兽医 | 3121篇 |
园艺 | 19篇 |
植物保护 | 70篇 |
出版年
2023年 | 64篇 |
2022年 | 20篇 |
2021年 | 51篇 |
2020年 | 113篇 |
2019年 | 26篇 |
2018年 | 91篇 |
2017年 | 96篇 |
2016年 | 91篇 |
2015年 | 114篇 |
2014年 | 151篇 |
2013年 | 172篇 |
2012年 | 152篇 |
2011年 | 182篇 |
2010年 | 135篇 |
2009年 | 123篇 |
2008年 | 152篇 |
2007年 | 116篇 |
2006年 | 89篇 |
2005年 | 79篇 |
2004年 | 105篇 |
2003年 | 103篇 |
2002年 | 118篇 |
2001年 | 107篇 |
2000年 | 88篇 |
1999年 | 82篇 |
1998年 | 105篇 |
1997年 | 103篇 |
1996年 | 81篇 |
1995年 | 80篇 |
1994年 | 72篇 |
1993年 | 91篇 |
1992年 | 104篇 |
1991年 | 82篇 |
1990年 | 94篇 |
1989年 | 80篇 |
1988年 | 71篇 |
1987年 | 80篇 |
1986年 | 36篇 |
1985年 | 48篇 |
1984年 | 40篇 |
1983年 | 52篇 |
1982年 | 19篇 |
1980年 | 2篇 |
1977年 | 1篇 |
1975年 | 2篇 |
1974年 | 1篇 |
1973年 | 1篇 |
1972年 | 4篇 |
1971年 | 1篇 |
1970年 | 1篇 |
排序方式: 共有3874条查询结果,搜索用时 15 毫秒
61.
Utilization of digital differential display to identify differentially expressed genes related to rumen development
下载免费PDF全文
![点击此处可从《Animal Science Journal》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Daichi Kato Yutaka Suzuki Satoshi Haga KyoungHa So Eri Yamauchi Miwa Nakano Hiroshi Ishizaki Kichoon Choi Kazuo Katoh Sang‐Gun Roh 《Animal Science Journal》2016,87(4):584-590
This study aimed to identify the genes associated with the development of the rumen epithelium by screening for candidate genes by digital differential display (DDD) in silico. Using DDD in NCBI's UniGene database, expressed sequence tag (EST)‐based gene expression profiles were analyzed in rumen, reticulum, omasum, abomasum and other tissues in cattle. One hundred and ten candidate genes with high expression in the rumen were derived from a library of all tissues. The expression levels of 11 genes in all candidate genes were analyzed in the rumen, reticulum, omasum and abomasum of nine Japanese Black male calves (5‐week‐old pre‐weaning: n = 3; 15‐week‐old weaned calves: n = 6). Among the 11 genes, only 3‐hydroxy‐3‐methylglutaryl‐CoA synthase 2 (HMGCS2), aldo‐keto reductase family 1, member C1‐like (AKR1C1), and fatty acid binding protein 3 (FABP3) showed significant changes in the levels of gene expression in the rumen between the pre‐ and post‐weaning of calves. These results indicate that DDD analysis in silico can be useful for screening candidate genes related to rumen development, and that the changes in expression levels of three genes in the rumen may have been caused by weaning, aging or both. © 2015 Japanese Society of Animal Science 相似文献
62.
Woo-Jung Park Byung-Joo Park Hee-Seop Ahn Joong-Bok Lee Seung-Yong Park Chang-Seon Song Sang-Won Lee Han-Sang Yoo In-Soo Choi 《Journal of veterinary science (Suw?n-si, Korea)》2016,17(1):1-11
Hepatitis E outbreaks are a serious public health concern in developing countries. The disease causes acute infections, primarily in young adults. The mortality rate is approximately 2%; however, it can exceed 20% in pregnant women in some regions in India. The causative agent, hepatitis E virus (HEV), has been isolated from several animal species, including pigs. HEV genotypes 3 and 4 have been isolated from both humans and animals, and are recognized as zoonotic pathogens. Seroprevalence studies in animals and humans indirectly suggest that HEV infections occur worldwide. The virus is primarily transmitted to humans via undercooked animal meats in developed countries. Moreover, transfusion- and transplantation-mediated HEV infections have recently been reported. This review summarizes the general characteristics of hepatitis E, HEV infection status in animals and humans, the zoonotic transmission modes of HEV, and HEV vaccine development status. 相似文献
63.
Rita M. Hanel DVM DACVIM DACVECC Lee Palmer DVM MS DACVECC NREMT‐T WEMT CCRP Janice Baker DVM DACVPM Jo‐Anne Brenner BA EMT‐I EMT‐T David Dorman DVM PhD DABVT John C. Gicking DVM DACVECC Brian Gilger DVM MS DACVO DABT Cynthia M. Otto DVM PhD DACVECC DACVSMR Elizabeth Rozanski DVM DACVECC DACVIM Brian Trumpatori DVM 《Journal of Veterinary Emergency and Critical Care》2016,26(2):166-233
64.
Nutritional analysis and microbiological evaluation of commercially available enteral diets for cats
下载免费PDF全文
![点击此处可从《Journal of Veterinary Emergency and Critical Care》网站下载免费的PDF全文](/ch/ext_images/free.gif)
65.
66.
Thromboelastographic evidence of inhibition of fibrinolysis after ε‐aminocaproic acid administration in a dog with suspected acute traumatic coagulopathy
下载免费PDF全文
![点击此处可从《Journal of Veterinary Emergency and Critical Care》网站下载免费的PDF全文](/ch/ext_images/free.gif)
67.
Comparison of 4 point‐of‐care blood gas analyzers for arterial blood gas analysis in healthy dogs and dogs with cardiopulmonary disease
下载免费PDF全文
![点击此处可从《Journal of Veterinary Emergency and Critical Care》网站下载免费的PDF全文](/ch/ext_images/free.gif)
68.
69.
70.