全文获取类型
收费全文 | 1479篇 |
免费 | 169篇 |
专业分类
林业 | 19篇 |
农学 | 16篇 |
基础科学 | 6篇 |
95篇 | |
综合类 | 146篇 |
农作物 | 32篇 |
水产渔业 | 36篇 |
畜牧兽医 | 1253篇 |
园艺 | 11篇 |
植物保护 | 34篇 |
出版年
2023年 | 24篇 |
2022年 | 7篇 |
2021年 | 20篇 |
2020年 | 64篇 |
2019年 | 24篇 |
2018年 | 58篇 |
2017年 | 53篇 |
2016年 | 29篇 |
2015年 | 41篇 |
2014年 | 77篇 |
2013年 | 65篇 |
2012年 | 88篇 |
2011年 | 59篇 |
2010年 | 55篇 |
2009年 | 80篇 |
2008年 | 51篇 |
2007年 | 56篇 |
2006年 | 35篇 |
2005年 | 43篇 |
2004年 | 40篇 |
2003年 | 32篇 |
2002年 | 35篇 |
2001年 | 33篇 |
2000年 | 26篇 |
1999年 | 40篇 |
1998年 | 25篇 |
1997年 | 16篇 |
1996年 | 31篇 |
1995年 | 31篇 |
1994年 | 19篇 |
1993年 | 25篇 |
1992年 | 31篇 |
1991年 | 30篇 |
1990年 | 27篇 |
1989年 | 24篇 |
1988年 | 24篇 |
1987年 | 26篇 |
1986年 | 8篇 |
1985年 | 17篇 |
1984年 | 17篇 |
1983年 | 15篇 |
1982年 | 10篇 |
1981年 | 9篇 |
1977年 | 7篇 |
1975年 | 6篇 |
1970年 | 9篇 |
1969年 | 7篇 |
1968年 | 6篇 |
1967年 | 5篇 |
1924年 | 8篇 |
排序方式: 共有1648条查询结果,搜索用时 15 毫秒
31.
32.
33.
Mandy L. Wallace Janet A. Grimes Daniel J. Duffy Cameron Kindra Melissa MacIver Samantha Lin Valery F. Scharf Chad W. Schmiedt 《The Canadian veterinary journal. La revue veterinaire canadienne》2021,62(6):617
A possible association between the development of nontraumatic, acquired inguinal hernias (NAIH) and perineal hernias (PH) has been postulated in adult dogs. The objective of this study was to evaluate the frequency of concurrent diagnosis of PH in dogs presented with NAIH and determine potential risk factors for concurrent PH and NAIH. Medical records of adult male dogs presented for NAIH to 4 hospitals between 2007 and 2017 were retrospectively reviewed. Twenty-one dogs with NAIH were included, 8 of which had concurrent PH. There were no significant differences between dogs with and without PH; however, among dogs with both conditions, intact dogs (8.1 ± 1.4 years) were younger than neutered dogs (11.7 ± 1.0 years; P = 0.007). Thirty-eight percent of male dogs presenting for NAIH had concurrent PH, indicating that these conditions commonly occur together. Dogs presenting for NAIH should be carefully evaluated for concurrent PH before surgical intervention. 相似文献
34.
Andrew T. Willis Samantha Barnum Nicola Pusterla 《The Canadian veterinary journal. La revue veterinaire canadienne》2021,62(1):51
This study aimed to validate a point-of-care polymerase chain reaction (PCR) assay for detection of Streptococcus equi subsp. equi (S. equi) in rostral nasal swabs from horses with suspected acute strangles and to compare the results against the molecular gold standard of quantitative polymerase chain reaction (qPCR). Two hundred thirty-two individual swabs of rostral nasal passages were characterized by qPCR as S. equi positive, S. equi subsp. zooepidemicus (S. zooepidemicus) positive, or S. equi and S. zooepidemicus negative. The specificity and sensitivity of the point-of-care PCR assay were 89% and 84%, respectively. The limits of detection of the qPCR assay and the point-of-care PCR analyzer were 3 and 277 eqbE target genes of S. equi, respectively. Overall agreement and short turnaround time make the point-of-care PCR assay a potential molecular diagnostic platform that will enhance the capability of equine veterinarians to timely support a diagnosis of strangles and institute proper biosecurity protocols. 相似文献
35.
Differentiation between dogs with thrombosis and normal dogs using the overall hemostasis potential assay 下载免费PDF全文
Anna L. Dengate BVSc BMedSc Marie‐Christine Morel‐Kopp PhD Julia A. Beatty PhD BVetMed BSc Vanessa Barrs BVSc MVetClinStud Jody A. Braddock BVSc MVetClinStud Richard K. Churcher BVSc Bethany J. Wilson BVSc PhD Christopher M. Ward BMedSc MBChB PhD 《Journal of Veterinary Emergency and Critical Care》2016,26(3):446-452
36.
Thromboelastographic assessment of the contribution of platelets and clotting proteases to the hypercoagulable state of dogs with immune‐mediated hemolytic anemia 下载免费PDF全文
37.
38.
39.