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排序方式: 共有194条查询结果,搜索用时 0 毫秒
1.
The paper considers briefly the history of the use of timberunderground and the general problem of support and goes on todiscuss the two main uses for timber in mining, i.e. on roadwaysand at the coal face, where the two principal methods of workingare pillar and stall working and longwall working. Species whosetimber is useful for supports are listed and the various kindsof supports given together with the chief factors affectingtheir behaviour. Replacement of timber by steel is discussed,and in considering the outlook for home-grown timber props emphasisis laid on the need to supply only the best types properly preparedand seasoned. 相似文献
2.
REBECCA L. FRANKENY VMD DAVID A. WILSON DVM MS Diplomate ACVS NAT T. MESSER IV DVM Diplomate ABVP CYNTHIA CAMPBELL-BEGGS DVM 《Veterinary surgery : VS》1995,24(6):515-517
Jejunojejunal intussusception occurred after jejunal resection and stapled functional end-to-end anastomosis in two pony mares. In both mares, the lead point of the intussusception was the stapled functional end-to-end (FEE) anastomosis. The stapled free ends of jejunum were oversewn with an inverting suture pattern. A possible explanation for development of the intussusception was the acute angle created in the intestine by the FEE anastomsis. This angulation may have impaired flow of ingesta causing motility changes that predisposed the site to intussusception. Because the oversewn blind intestinal ends acted as the lead point for formation of the intussusception, it may be inadvisable to oversew the stapled anastomotic ends. 相似文献
3.
R. Trevor WILSON 《Journal of Equine Science》2013,24(3):37-45
Equines are minor species in Tanzania’s array of domestic livestock. Attempts to use them
for transport by early explorers from the mid-nineteenth century usually failed. Donkeys
were used extensively as pack animals to complement human porters by both British and
German forces in the First World War, but their advantages were often outweighed by slow
progress and competition with troops and porters for water, and they died in huge numbers.
The British had regular cavalry troops in their campaign and mules found limited use as
individual mounts for officers. In modern times, there are very few horses in Tanzania but
they find several uses. Exotic safaris are made on horseback, they are used as stock
horses on ranches, there is a polo club in northern Tanzania and there are leisure riding
activities around the capital city. Official census records for donkeys estimate numbers
at under 300,000 with concentrations in the northern pastoral and agropastoral areas where
they are used as pack animals with water being the main commodity transported. Elsewhere
donkeys are used to a limited extent in transport and traction work. There is little
interest in equines by the central and local governments or the general public and the
status quo can be expected to continue. 相似文献
4.
Laparoscopic Cryptorchid Castration in Standing Horses 总被引:1,自引:0,他引:1
DEAN A. HENDRICKSON DVM MS Dipiomate ACVS DAVID G. WILSON DVM Dipiomate ACVS 《Veterinary surgery : VS》1997,26(4):335-339
Objective — This article describes a new technique for laparoscopic cryptorchid castration in standing horses. Study Design — Prospective study. Animals or Sample Population — Eight horses aged 11 months to 3 years and weighing between 300 and 643 kg. Methods — Food was withheld for 24 to 36 hours, and then horses were sedated with detomidine HC1 (0.02 to 0.03 mg/kg) and butorphanol tartrate (0.02 mg/kg). The paralumbar fossa region was desensitized with 2% mepivacaine in an inverted “L” pattern and caudal epidural anesthesia was administered with either xylazine (0.18 mg/kg diluted to 10 to 15 mL with 0.9% sodium chloride) or a combination of 2% mepivacaine and xylazine (0.18 mg/kg). Initial laparoscopic exploration was performed from the left flank; in three horses, right flank laparoscopy was needed to complete the procedure. The spermatic cord was ligated within the abdomen with one or two sutures of 0 polydioxanone suture, and the testis or testes removed through a flank incision. Results — In five horses with no palpably descended testes, standing laparoscopy was the only procedure performed, whereas in two horses, the abdominal testis was removed laparoscopically, and the descended testis was removed under short acting anesthesia. In one horse, with nonpalpable testes, it was determined by laparoscopic observation that the testes were in the inguinal canal, and castration was performed under general anesthesia. No surgical or postoperative complications were noted. The right side of the abdomen, and especially the right vaginal ring, could be easily observed from the left side by passing the laparoscope through a small perforation in the mesocolon of the descending colon or by elevating the descending colon with an instrument or by use of an arm in the rectum. Conclusions — The standing laparoscopic approach combined with or without short-acting anesthesia to remove the descended testis is easily performed. Clinical Relevance — This approach will provide surgeons with another option to castrate cryptorchid stallions. 相似文献
5.
Rory P. WILSON Mark HOLTON Vianney L. WILSON Richard GUNNER Brenda TYSSE Gwendoline I. WILSON Flavio QUINTANA Carlos DUARTE D. Michael SCANTLEBURY 《Integrative zoology》2019,14(1):17-29
Two prime issues can detrimentally affect animals that have been equipped with tags: (i) the effect of the capture and restraint process; and (ii) the effect of the tag itself. This work examines some of the issues surrounding quantification of tag effects on wild animals for both restrained and free‐living animals. A new method to quantify stress effects based on monitoring ventilation rates in relation to activity is suggested for restrained animals which may help improve the practice of handling animals. It is also suggested that various metrics, many derived from accelerometers, can be examined in tagged wild animals to examine the change in behaviors over time with a view to having a better understanding of welfare issues, assuring the quality of recorded data and informing best practice. 相似文献
6.
VJ Stenner 《Australian veterinary journal》2001,79(2):112-112
Manual of Canine and Feline Wound Management and Reconstruction. Edited by Fowler D and Williams JM 相似文献
7.
C. L. ARAGON M. R. READ J. S. GAYNOR M. D. BARNHART D. WILSON & M. G. PAPICH 《Journal of veterinary pharmacology and therapeutics》2009,32(2):129-136
This study investigated the pharmacokinetics of a human-labeled oral morphine formulation consisting of both immediate and extended release components in dogs. In a randomized design, 14 dogs were administered either 1 or 2 mg/kg morphine orally. Blood samples were collected up to 24 h post drug administration. Plasma concentrations of morphine were measured using high-pressure liquid chromatography with electrochemical coulometric detection. For both groups, maximal concentration occurred at 3 h post drug administration followed by a gradual decrease in morphine concentration over 24 h. There was substantial variability in morphine concentrations among dogs. The higher dose group produced a greater exposure (higher area-under-the-curve), higher peak concentration, longer half-life and a shorter time to peak concentration ( t max ). The specific oral morphine formulation used in this study produced sustained plasma morphine concentrations over 24 h compared with previous intravenous dosing and immediate-release oral morphine studies. However, the low morphine plasma concentrations and high variability produced from this formulation, suggest that the clinical application of this formulation at the doses evaluated in this study are limited. 相似文献
8.
K. A. NYROP DVM MS R. M. DEBOWES DVM MS DiplomateACVs H. R. FERGUSON DVM PhD DiplomateACVs H. W. LEIPOLD DR MED VET PhD J. W. WILSON DVM PhD DiplomateACVs M. M. GUFFY DVM MS DiplomateACVR 《Veterinary surgery : VS》1990,19(4):249-253
The arterial blood supply to the diaphysis of the radius, and the vascular reaction when three cerclage devices (cerclage wire, Parham-Martin band, and a partially contacting band) were applied 2 cm apart, were studied in six adult ponies. The opposite radial diaphysis served as the control. Ponies were euthanatized at weeks 4 and 8. A centrifugal blood flow pattern was demonstrated by microangiography. Larger numbers of medullary arteries exist in equine than in canine and human long bones. Changes in centrifugal blood supply were not identified beneath any of the cerclage devices. 相似文献
9.
JAMES K. ROUSH DVM MS JAMES W. WILSON DVM MS DiplomateACVS 《Veterinary surgery : VS》1989,18(3):190-196
Osteotomies were created in the left body of the mandible of nine dogs and immediately stabilized with either a six hole dynamic compression bone plate or an intramedullary pin. Cortical bone healing and vascular supply were evaluated at weeks 2, 5, and 10 by microradiography, microangiography, and correlated histology of selected mandibular slices. Perforating arterioles from the buccal mucosa maintained vascular supply to rostral mandibular segments. The mandibular body rostral to the osteotomy site and caudal to the canine tooth suffered an interruption of vascular supply that was replaced by a temporary extraosseous supply during healing of the osteotomy. Intramedullary pin placement resulted in destruction of rostral teeth. There was an inflammatory response around the rostral portion of all intramedullary pins. Osteotomy sites involving tooth roots resulted in no disruption of the normal vascular or neural structures of the tooth pulp. 相似文献
10.
Hepatic Lobe Torsion as a Cause of Colic in a Horse 总被引:2,自引:0,他引:2
TRACY A. TURNER DVM MS Diplomate ACVS CYNTHIA A. BROWN dvm JULIA H. WILSON DVM Diplomate ACVIM LOIS ROTH DVM Diplomate ACVP DIANA S. ROSENSTEIN DVM CHRISTINE M. SCHWEIZER dvm KRISTINE A. WOODAMAN dvm 《Veterinary surgery : VS》1993,22(4):301-304
A 14-year-old Arabian gelding was examined for colic. An exploratory celiotomy was subsequently performed and the left lobe of the liver was found to be twisted. The lobe was resected using a TA-90 surgical stapling instrument. Histologic examination of the resected liver indicated portal vein and sinusoid dilation and congestion with blood. There were focal areas of necrosis and bacterial cocci and rods throughout the section. The histologic findings were consistent with hepatic lobe torsion. After surgery, the horse was treated with broad spectrum antibiotics, anti-inflammatory drugs, heparin, and intravenous fluids. The horse recovered without complications, although serum liver enzymes remained elevated for more than 1 week after surgery. Seven months after surgery the horse showed no adverse affects from the disease. 相似文献