全文获取类型
收费全文 | 266篇 |
免费 | 20篇 |
专业分类
林业 | 24篇 |
农学 | 3篇 |
基础科学 | 1篇 |
34篇 | |
综合类 | 34篇 |
农作物 | 13篇 |
水产渔业 | 44篇 |
畜牧兽医 | 105篇 |
园艺 | 15篇 |
植物保护 | 13篇 |
出版年
2024年 | 1篇 |
2023年 | 4篇 |
2022年 | 3篇 |
2021年 | 10篇 |
2020年 | 13篇 |
2019年 | 16篇 |
2018年 | 12篇 |
2017年 | 13篇 |
2016年 | 10篇 |
2015年 | 17篇 |
2014年 | 26篇 |
2013年 | 16篇 |
2012年 | 19篇 |
2011年 | 18篇 |
2010年 | 8篇 |
2009年 | 6篇 |
2008年 | 19篇 |
2007年 | 14篇 |
2006年 | 16篇 |
2005年 | 10篇 |
2004年 | 10篇 |
2003年 | 7篇 |
2002年 | 4篇 |
2001年 | 1篇 |
2000年 | 2篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1989年 | 1篇 |
1987年 | 1篇 |
1982年 | 1篇 |
1977年 | 1篇 |
1975年 | 1篇 |
1971年 | 2篇 |
1899年 | 1篇 |
排序方式: 共有286条查询结果,搜索用时 125 毫秒
1.
Fiona Da Riz Paul Higgs Guillaume Ruiz 《The Canadian veterinary journal. La revue veterinaire canadienne》2021,62(6):611
Cobalamin concentration is often assessed in clinical practice but little is known about the significance of hypercobalaminemia. The objective of this retrospective study was to identify the conditions associated with hypercobalaminemia in dogs and to investigate association with clinicopathological variables. Medical records of dogs having serum cobalamin measured between 2016 and 2018 were reviewed. One hundred sixty dogs were included and 47 (29%) showed hypercobalaminemia. Dogs with hypercobalaminemia had gastrointestinal (57%), hepatic (11%), neurological (11%), endocrine (9%), renal (4%), pancreatic (2%), and miscellaneous (6%) diseases. Overall, 11% had neoplasia. This distribution was not significantly different from that for hypocobalaminemic and normocobalaminemic dogs. There were significantly more dogs with hyperfolatemia in the hypercobalaminemia group. These results suggest that in clinical practice hypercobalaminemia is commonly identified in gastrointestinal and hepatic disease in dogs, but can also be seen with endocrine and neurological conditions. The frequency of hyperfolatemia alongside hypercobalaminemia may reflect common metabolic pathways. 相似文献
2.
3.
4.
5.
6.
Tabouret G Lacroux C Andreoletti O Bergeaud JP Hailu-Tolosa Y Hoste H Prevot F Grisez C Dorchies P Jacquiet P 《Veterinary research》2003,34(2):231-241
Cellular and humoral local responses were investigated following repetitive artificial Oestrus ovis infections in lambs. The presence of larvae induced a huge local recruitment of either leucocytes (T and B lymphocytes, macrophages) or granulocytes (eosinophils, mast cells and globule leucocytes). This cellular response was more pronounced in the ethmoid and sinus (development sites of second and third instar larvae) than in the septum or turbinates where first instar larvae migrate. Infected lambs produced Oestrus ovis specific IgG and IgA antibodies in their mucus. This local humoral response was mainly directed against larval salivary gland antigens and not against larval digestive tract antigens. Compared to the control animals, the sinusal mucosa of infected animals was extremely thickened and the epithelium exhibited hyperplasia, metaplasia and eosinophilic exocytosis. The possible roles of these local immune responses in the regulation of O. ovis larvae populations in sheep are discussed. 相似文献
7.
Albertine Léon Stéphane Pronost Jackie Tapprest Nathalie Foucher Béatrice Blanchard Geneviève André-Fontaine Claire Laugier Guillaume Fortier Roland Leclercq 《Journal of veterinary diagnostic investigation》2006,18(2):218-221
Studies were carried out to determine the cause of death in a prematurely born Thoroughbred foal that died 24 hours after birth. Necropsy revealed gross lesions suggestive of septicemia. A commercial Leptospira polymerase chain reaction (PCR) assay designed to specifically amplify the hemolysis-associated protein 1 (hap1) gene present only in pathogenic Leptospira strains detected the presence of Leptospira DNA in various tissues of the foal. Histologic examination of lung, liver, kidney, and myocardium revealed numerous spirochetes in Warthin-Starry-stained tissue sections. Results of PCR analysis and histologic examination suggested a leptospiral infection in the newborn foal. At the moment of death, the infection coexisted with a streptococcal-associated aspiration bronchopneumonia and postpartum septicemia. These findings indicate that the PCR assay based on the amplification of the hap1 gene represents a useful tool for specific detection of pathogenic leptospira in field samples taken from horses. 相似文献
8.
9.