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排序方式: 共有105条查询结果,搜索用时 359 毫秒
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J. N. MOORE D.V.M. J. H. JOHNSON D.V.M. M.S. L G. TRITSCHLER D.V.M. M.S. H. E. GARNER D.V.M. PH.D. 《Veterinary surgery : VS》1978,7(2):43-47
Horses with undescended testes are frequently presented to the veterinary surgeon for castration. The pertinent pre-operative evaluations and diagnostic procedures that should be made prior to either surgical intervention or referral of such cases are outlined. Several accepted anesthetic and surgical techniques are similarly reviewed. Case histories of 58 horses referred during a two year period are reviewed and correlated with the findings of a recent study of equine testicular development and descent. 相似文献
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Effect of soil drying on mucilage exudation and its water repellency: a new method to collect mucilage 下载免费PDF全文
Mutez A. Ahmed Maire Holz Susanne K. Woche Jörg Bachmann Andrea Carminati 《植物养料与土壤学杂志》2015,178(6):821-824
Despite the importance of mucilage for soil–plant relations, little is known about the effect of soil drying on mucilage exudation. We introduce a method to collect mucilage from maize growing in wet and dry soils. Mucilage was collected from brace roots. The amount of mucilage exuded did not change with soil water content and transpiration rate. Mucilage exuded in dry soils had a higher degree of hydrophobicity, suggesting that the wetting properties of mucilage change in response to soil drying. 相似文献
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DAVID STOLOFF D.V.M. M.S… ‡ HUGH C. BUTLER D.V.M. M.S. § MARK M. GUFFY D.V.M. M.S. † § HORST W. LEIPOLD D.V.M. PH.D. § 《Veterinary surgery : VS》1979,8(2):38-45
An 18-week study was conducted to evaluate orthotopic osteochondral transplantation of the proximal femur in the dog. Eighteen dogs were divided into 3 groups of 6 each. The first group received autografts, the second received fresh allografts, and the third received grafts that had been frozen in a bone bank for 24–28 days. The grafts were fixed in position using dynamic compression plates. The grafted limbs were maintained in a sling and thus were nonfunctional and non-weight bearing throughout the 18-week study. Postoperatively the dogs were given oral tetracycline to assess osteo- cyte viability. The dogs were radiographed at 2–week intervals and 1 dog in each group was euthanatized every 3 weeks. The femurs were examined using standard histopathologic and fluorescent labeling techniques. All femoral heads were luxated by the 2nd postoperative week. The bones of all the femoral heads underwent avascular necrosis and degenerative changes were present in the transplanted cartilage by the 6th postoperative week. During the first 18 weeks following transplantation there was little radiographic and histologic difference among the 3 types of grafts regarding the nature and rate of bone healing. Based on the data obtained from techniques utilized in this study, the femoral head, neck, and articular cartilage did not survive, while the femoral diaphysis did survive the transplantation process. Different techniques may alter to some degree the results obtained. 相似文献
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Testosterone concentrations in stallions showed a seasonal trend with peak concentrations in the spring (April and May in Britain) and lowest concentrations in the period from December to February. The effect on this pattern of changing the length of the photoperiod at the end of the normal breeding season (mid-summer's day) was studied in 2 experiments. In the first experiment artificial illumination was organised from 21 June to mimic the effect of transfer to a southern hemisphere spring and summer, that is short days becoming longer. The stallions had low concentrations of testosterone in February and high concentrations in April. Concentrations in July, August and September were extremely low with a return to high values in late November/early December. In the second experiment, illumination was maintained at the equivalent of a 16 1/2-hour day from 21 June to mid December. These stallions had high testosterone concentrations in April, after which they fell until August, later rising to a maximum in October. These results are discussed in relation to transfer of stallions between the northern and southern hemispheres. 相似文献
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PAMELA C. WAGNER M.S. D.V.M. GEORGE W. BAGBY M.D. § BARRIE D. GRANT D.V.M. M.S. ANTHONY GALLINA D.V.M. PH.D. † MARC RATZLAFF D.V.M. PH.D. ‡ RON SANDE D.V.M. PH.D. 《Veterinary surgery : VS》1979,8(1):7-12
The Cloward technique for intervertebral fusion was utilized on 12 horses ranging from 3 months to 2 years of age. Of the 12 horses, 9 had been diagnosed as having equine cervical vertebral malformation (CVM) or "wobbles," and 3 were normal controls. A large hole was drilled from the ventral border of the vertebral bodies spanning the intervertebral disc and the vertebral end plates of the 2 articulating vertebrae. Frozen homologous bone dowels of slightly larger diameter from equine cadaver ilia were inserted in the holes. No adverse postoperative complication arose. Clinical improvement was seen in all horses with CVM. Three months postoperatively, partial or complete fusion was evident radiographically in 11 of the 12 horses. Necropsies were performed 3–6 months postoperatively to evaluate the quality of the fusion. Cadaver manipulation demonstrated reduced intervertebral movement at the operative site in all cases. The articulations of the equine cervical spine can be operatively fused by the Cloward technique, and surgically induced trauma is minimal. This technique can be used for stabilizing subluxations and may be applicable for treating fractures and osteolytic processes that have weakened vertebrae. 相似文献
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E. A. STONE D.V.M. C. A. RAWLINGS D.V.M. PH.D. † K. W. PRASSE D.V.M. PH.D. ‡ J. R. DUNCAN D.V.M. PH.D. § 《Veterinary surgery : VS》1978,7(4):93-96
Intraoperative biopsy and microscopy were evaluated, retrospectively, in 23 exploratory laparotomies. After comparing the surgical impression to the microscopic diagnosis obtained during surgery, the use of intraoperative cytologic and frozen section examination altered the surgical plan in 13 cases and reinforced the surgical plan in 10 cases. No cases had an intraoperative microscopic diagnosis that differed from the postoperative histologic examination of paraffin sections. Recommendations for selecting cases and for using intraoperative biopsy and microscopy are included. 相似文献