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排序方式: 共有133条查询结果,搜索用时 15 毫秒
1.
Isolation of Haemophilus somnus from bovine milk 总被引:1,自引:0,他引:1
2.
3.
Painter S 《Science (New York, N.Y.)》1985,229(4717):958-959
4.
Greer AL 《Science (New York, N.Y.)》1995,267(5206):1947-1953
Amorphous metallic alloys, relative newcomers to the world of glasses, have properties that are unusual for solid metals. The metallic glasses, which exist in a very wide variety of compositions, combine fundamental interest with practical applications. They also serve as precursors for exciting new nanocrystalline materials. Their magnetic (soft and hard) and mechanical properties are of particular interest. 相似文献
5.
Comparison of three methods of temperature measurement in hypothermic, euthermic, and hyperthermic dogs 总被引:1,自引:0,他引:1
Greer RJ Cohn LA Dodam JR Wagner-Mann CC Mann FA 《Journal of the American Veterinary Medical Association》2007,230(12):1841-1848
OBJECTIVE: To assess the reliability and accuracy of a predictive rectal thermometer, an infrared auricular thermometer designed for veterinary use, and a subcutaneous temperature-sensing microchip for measurement of core body temperature over various temperature conditions in dogs. DESIGN: Prospective study. ANIMALS: 8 purpose-bred dogs. PROCEDURES: A minimum of 7 days prior to study commencement, a subcutaneous temperature-sensing microchip was implanted in 1 of 3 locations (interscapular, lateral aspect of shoulder, or sacral region) in each dog. For comparison with temperatures measured via rectal thermometer, infrared auricular thermometer, and microchip, core body temperature was measured via a thermistor-tipped pulmonary artery (TTPA) catheter. Hypothermia was induced during anesthesia at the time of TTPA catheter placement; on 3 occasions after placement of the catheter, hyperthermia was induced via administration of a low dose of endotoxin. Near-simultaneous duplicate temperature measurements were recorded from the TTPA catheter, the rectal thermometer, auricular thermometer, and subcutaneous microchips during hypothermia, euthermia, and hyperthermia. Reliability (variability) of temperature measurement for each device and agreement between each device measurement and core body temperature were assessed. RESULTS: Variability between duplicate near-simultaneous temperature measurements was greatest for the auricular thermometer and least for the TTPA catheter. Measurements obtained by use of the rectal thermometer were in closest agreement with core body temperature; for all other devices, temperature readings typically underestimated core body temperature. CONCLUSIONS AND CLINICAL RELEVANCE: Among the 3 methods of temperature measurement, rectal thermometry provided the most accurate estimation of core body temperature in dogs. 相似文献
6.
The practice of horse rugging has important implications for horse welfare and performance, but in Australia, rugging practices have not been properly documented. The objective of this study was to obtain an understanding of Australian horse rugging practices. An online survey reviewed the management of 2659 Australian horses over 12 months. Of the reported horses a total of 84.8% were rugged, although most owners (69.5%) indicated that they were unsure whether horses needed to be rugged at all. Rugging was felt by 59.8% of owners to be a requirement for horses in competition. Riding and competition were significantly associated with the use of rugs. Nearly all respondents (89.0%) felt that ‘over-rugging’ was a concern. However, 4.8% of owners would use up to 4 rugs at any one time on their horse and 21.4% of horses were still rugged in temperatures above 20°C in Australia. Many Australian horse owners (42.8%) also believe that horses feel cold if they are not rugged. Anthropomorphism when it comes to rugging horses cannot be justified as the horse has a much wider thermoneutral zone (TNZ) than humans. Australian climate, owner opinions, equestrian discipline and whether a horse is used for riding influence Australian horse rugging practices. However, current practices are based on limited available research and are not necessarily to the benefit of the horse. The major limitation was that the survey likely attracted respondents who are interested in the topic creating a self-selection bias. 相似文献
7.
John M Sykes Michael M Garner Leah L Greer Nancy P Lung Rob L Coke Frank Ridgley Mitch Bush Richard J Montali Ben Okimoto Robert Schmidt Jack L Allen Bruce A Rideout Patricia A Pesavento Edward C Ramsay 《Journal of zoo and wildlife medicine》2007,38(2):300-308
Oral eosinophilic granulomas were diagnosed in 16 tigers (Panthera tigris). All lesions were located on the hard or soft palate and typically consisted of flat or slightly raised circular ulcers. Histologic features of these lesions were essentially identical to those seen in oral eosinophilic granulomas of domestic cats and dogs. No clinical signs were noted in eight cases, though various degrees of inappetence, excessive salivation, and dysphagia were noted in the other eight tigers. Six cases were not treated. Treatment for the remaining 10 cases centered on corticosteroids and additional treatments included surgical removal, cryotherapy, antibiotics, and chlorpheniramine. Treatment with corticosteroids did appear to be effective in some cases, though lesions would worsen after cessation of therapy and no cases were cured. In addition, three cases developed complications possibly related to this corticosteroid therapy. The etiology of these lesions remains unknown, though an underlying allergic condition is likely. 相似文献
8.
Peter S. Solomon T. J. Greer Wilson Kasia Rybak Kerrie Parker Rohan G. T. Lowe Richard P. Oliver 《European journal of plant pathology / European Foundation for Plant Pathology》2006,114(3):275-282
The interaction between Stagonospora nodorum and a susceptible wheat cultivar was investigated using a range of microscopic techniques. Germination of pycnidiospores
occurred approximately 3 h after making contact with the leaf surface and was followed by attempted penetration 8–12 h later.
Penetration was observed through stomata and also directly through periclinal and anticlinal epidermal cell walls. Penetration
down the anticlinal cell walls appeared to occur without a differentiated penetrating structure whilst structures identified
as either lateral appressoria or hyphopodia were typically present when penetrating over a periclinal cell wall. Once inside
the leaf, the fungus continued to grow for the next 4–5 days colonising all parts of the leaf except the vascular bundles.
Only in the later phase of the infection was total host cell collapse apparent. Evidence of polyphenolic compounds was observed.
The infection cycle was completed within 7 days as indicated by sporulation on the leaf surface. These results have allowed
us to understand how the fungus physically interacts with the leaf and will help the overall understanding of the infection
process. 相似文献
9.
Painter TS 《Science (New York, N.Y.)》1923,58(1500):247-248
10.
A model to predict the bending modulus of elasticity (MOE) of oriented strand board (OSB) panels produced by batch processing
is presented. The approach developed herein is unique in its comprehensiveness since the MOE is determined from information
on the panel structure, temperature and moisture profiles and vertical density profiles obtained from the mat formation and
compression models presented in Part 1. Comparison of predicted MOE values with those measured from 24 commercially produced
panels shows good agreement considering some of the uncertainties involved. Simulations show that the MOE can be increased
by any of the following changes: reduced fines content, increased panel density, better flake alignment in each of the three
layers within a panel, increased flake length and a larger difference between the density of the face and core layers. The
model was also used in a genetic algorithm to carry out an optimization study of batch OSB manufacturing. This analysis showed
that by combining the appropriate reduction in the amount of flakes used, increase in fines content, improvement in flake
alignment within each of the face and core layers and shortening of the batch time, a significant theoretical profit increase
from the base case scenario can be obtained. 相似文献