全文获取类型
| 收费全文 | 147篇 |
| 免费 | 9篇 |
专业分类
| 林业 | 7篇 |
| 农学 | 1篇 |
| 2篇 | |
| 综合类 | 38篇 |
| 农作物 | 4篇 |
| 水产渔业 | 5篇 |
| 畜牧兽医 | 93篇 |
| 园艺 | 1篇 |
| 植物保护 | 5篇 |
出版年
| 2023年 | 2篇 |
| 2020年 | 2篇 |
| 2019年 | 2篇 |
| 2018年 | 3篇 |
| 2017年 | 4篇 |
| 2016年 | 1篇 |
| 2015年 | 2篇 |
| 2014年 | 2篇 |
| 2013年 | 10篇 |
| 2012年 | 3篇 |
| 2011年 | 2篇 |
| 2010年 | 5篇 |
| 2009年 | 6篇 |
| 2008年 | 1篇 |
| 2007年 | 7篇 |
| 2006年 | 8篇 |
| 2005年 | 4篇 |
| 2004年 | 1篇 |
| 2003年 | 7篇 |
| 2002年 | 3篇 |
| 2001年 | 3篇 |
| 2000年 | 1篇 |
| 1999年 | 4篇 |
| 1998年 | 4篇 |
| 1997年 | 14篇 |
| 1996年 | 3篇 |
| 1995年 | 5篇 |
| 1994年 | 4篇 |
| 1993年 | 5篇 |
| 1992年 | 9篇 |
| 1991年 | 3篇 |
| 1990年 | 1篇 |
| 1989年 | 2篇 |
| 1988年 | 2篇 |
| 1987年 | 1篇 |
| 1986年 | 2篇 |
| 1983年 | 2篇 |
| 1981年 | 1篇 |
| 1955年 | 1篇 |
| 1944年 | 1篇 |
| 1936年 | 1篇 |
| 1931年 | 1篇 |
| 1928年 | 1篇 |
| 1909年 | 1篇 |
| 1902年 | 2篇 |
| 1898年 | 3篇 |
| 1895年 | 1篇 |
| 1893年 | 2篇 |
| 1883年 | 1篇 |
排序方式： 共有156条查询结果，搜索用时 906 毫秒
91.
92.
93.
94.
95.
96.
97.
YASMINDA MALIK DVM DAVID SPRENG DVM Diplomate ECVS & ACVECC MARTIN KONAR DVM Diplomate ECVDI MARCUS G. DOHERR DVM PhD Diplomate ECVPH RE JAGGY PhD Diplomate ECVN JUDITH HOWARD DVM Diplomate ACVIM FRANCK FORTERRE DVM Diplomate ECVS 《Veterinary surgery : VS》2009,38(4):457-462
Objectives— (1) To assess spinal cord blood flow (SCBF) during surgical treatment of disk extrusion in dogs and (2) to investigate associations between SCBF, clinical signs, presurgical MRI images, and 24-hour surgical outcome.
Study Design— Cohort study.
Animals— Chondrodystrophic dogs with thoracolumbar disk extrusion (n=12).
Methods— Diagnosis was based on clinical signs and MRI findings, and confirmed at surgery. Regional SCBF was measured intraoperatively by laser-Doppler flowmetry before, immediately after surgical spinal cord decompression, and after 15 minutes of lavaging the lesion. Care was taken to ensure a standardized surgical procedure to minimize factors that could influence measurement readings.
Results— A significant increase in intraoperative SCBF was found in all dogs (Wilcoxon's signed-rank test; P =.05) immediately after spinal cord decompression and after 15 minutes. Changes in SCBF were not associated with duration of clinical signs; initial or 24-hour neurologic status; or degree of spinal cord compression assessed by MRI.
Conclusion— SCBF increases immediately after spinal cord decompression in dogs with disk herniation; however, increased SCBF was not associated with a diminished 24-hour neurologic status.
Clinical Relevance— An increase in SCBF does not appear to be either associated with the degree of spinal cord compression or of a magnitude sufficient to outweigh the benefit of surgical decompression by resulting in clinically relevant changes in 24-hour outcome. 相似文献
Study Design— Cohort study.
Animals— Chondrodystrophic dogs with thoracolumbar disk extrusion (n=12).
Methods— Diagnosis was based on clinical signs and MRI findings, and confirmed at surgery. Regional SCBF was measured intraoperatively by laser-Doppler flowmetry before, immediately after surgical spinal cord decompression, and after 15 minutes of lavaging the lesion. Care was taken to ensure a standardized surgical procedure to minimize factors that could influence measurement readings.
Results— A significant increase in intraoperative SCBF was found in all dogs (Wilcoxon's signed-rank test; P =.05) immediately after spinal cord decompression and after 15 minutes. Changes in SCBF were not associated with duration of clinical signs; initial or 24-hour neurologic status; or degree of spinal cord compression assessed by MRI.
Conclusion— SCBF increases immediately after spinal cord decompression in dogs with disk herniation; however, increased SCBF was not associated with a diminished 24-hour neurologic status.
Clinical Relevance— An increase in SCBF does not appear to be either associated with the degree of spinal cord compression or of a magnitude sufficient to outweigh the benefit of surgical decompression by resulting in clinically relevant changes in 24-hour outcome. 相似文献
98.
KATHARINA U. HEDIGER DVM STEPHEN J. FERGUSON DVM PhD PHILIPPE GEDET Dipl. Ing. RE BUSATO DVM MSc PD FRANCK FORTERRE DVM Diplomate ECVS SAMUEL ISLER DVM RETO BARMETTLER DVM JOHANN LANG DVM Diplomate ECVDI 《Veterinary surgery : VS》2009,38(7):874-880
Objective— To determine stiffness and load–displacement curves as a biomechanical response to applied torsion and shear forces in cadaveric canine lumbar and lumbosacral specimens.
Study Design— Biomechanical study.
Animals— Caudal lumbar and lumbosacral functional spine units (FSU) of nonchondrodystrophic large-breed dogs (n=31) with radiographically normal spines.
Methods— FSU from dogs without musculoskeletal disease were tested in torsion in a custom-built spine loading simulator with 6 degrees of freedom, which uses orthogonally mounted electric motors to apply pure axial rotation. For shear tests, specimens were mounted to a custom-made shear-testing device, driven by a servo hydraulic testing machine. Load–displacement curves were recorded for torsion and shear.
Results— Left and right torsion stiffness was not different within each FSU level; however, torsional stiffness of L7-S1 was significantly smaller compared with lumbar FSU (L4-5–L6-7).
Ventral/dorsal stiffness was significantly different from lateral stiffness within an individual FSU level for L5-6, L6-7, and L7-S1 but not for L4-5. When the data from 4 tested shear directions from the same specimen were pooled, level L5-6 was significantly stiffer than L7-S1.
Conclusions— Increased range of motion of the lumbosacral joint is reflected by an overall decreased shear and rotational stiffness at the lumbosacral FSU.
Clinical Relevance— Data from dogs with disc degeneration have to be collected, analyzed, and compared with results from our chondrodystrophic large-breed dogs with radiographically normal spines. 相似文献
Study Design— Biomechanical study.
Animals— Caudal lumbar and lumbosacral functional spine units (FSU) of nonchondrodystrophic large-breed dogs (n=31) with radiographically normal spines.
Methods— FSU from dogs without musculoskeletal disease were tested in torsion in a custom-built spine loading simulator with 6 degrees of freedom, which uses orthogonally mounted electric motors to apply pure axial rotation. For shear tests, specimens were mounted to a custom-made shear-testing device, driven by a servo hydraulic testing machine. Load–displacement curves were recorded for torsion and shear.
Results— Left and right torsion stiffness was not different within each FSU level; however, torsional stiffness of L7-S1 was significantly smaller compared with lumbar FSU (L4-5–L6-7).
Ventral/dorsal stiffness was significantly different from lateral stiffness within an individual FSU level for L5-6, L6-7, and L7-S1 but not for L4-5. When the data from 4 tested shear directions from the same specimen were pooled, level L5-6 was significantly stiffer than L7-S1.
Conclusions— Increased range of motion of the lumbosacral joint is reflected by an overall decreased shear and rotational stiffness at the lumbosacral FSU.
Clinical Relevance— Data from dogs with disc degeneration have to be collected, analyzed, and compared with results from our chondrodystrophic large-breed dogs with radiographically normal spines. 相似文献
99.
100.