蛋雏鸡传染性喉气管炎的诊治     

刘文超  贾俊亮  高娟  王海刚  孙士生 《中国兽药杂志》2005,39(2):49-50

鸡传染性喉气管炎(ILT)是由鸡传染性喉气管炎病毒引起的以剧烈咳嗽、气喘、高度呼吸困难和气管内有血样渗出物等为特征的一种急性呼吸道传染病.育成蛋鸡感染该病多有报道,而蛋雏鸡感染发病比较少见.本文以一起48日龄海兰褐蛋雏鸡传染性喉气管炎病例为题材,从发病情况、临床症状、病理剖检变化、诊断、防治等几个方面对该病做了详尽阐述.  相似文献   

猪败血性链球菌与附红细胞体混合感染病例     

孙展和  贾俊亮  王海刚  徐燕 《中国兽药杂志》2005,39(5):46-47

猪败血性链球菌病是猪链球菌感染引起的一种急性败血性传染病,猪附红细胞体病是由猪附红细胞体寄生于猪红细胞而引起的一种散在的热性、溶血性传染病.本文以某猪场这2种病混合感染病例为题材,从发病基本情况、临床症状、剖检变化、实验室检验、防治措施等6个方面对该混合感染病例做了详尽的阐述.  相似文献   

Straight lines on semilog paper     

B A Hills 《Science (New York, N.Y.)》1968,159(817):896-897

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Evidence for surfactant contributing to the gastric mucosal barrier of the horse     

Ethell MT  Hodgson DR  Hills BA 《Equine veterinary journal》2000,32(6):470-474

This study was undertaken to determine the hydrophobicity of the luminal surface of the equine stomach and to elucidate the ultrastructure of the lining imparting that property. Gastric and duodenal mucosal samples from 5 horses were collected immediately after euthanasia and subjected to surface contact angle measurement using a goniometer. Gastric mucosal samples from 4 horses and a foal were examined by electron microscopy following a fixation procedure known to preserve phospholipids and oligolamellar structures. Contact angles for the equine gastric glandular mucosal surface (mean +/- s.e. 78.0 +/- 11.0 degrees) were greater than for the duodenum (33.4 +/- 8.7 degrees), (P = 0.003). The contact angles for gastric squamous tissue (50.4 +/- 4.5 degrees) tended to be greater than for duodenum (P = 0.15). Electron microscopy revealed the existence of surfactant as abundant osmiophilic phospholipid material within both squamous and glandular gastric mucosae. These results indicate the hydrophobic nature of the equine gastric mucosae. We propose that the water-repellent nature of the stomach contributes to the 'gastric mucosal barrier' and is imparted by surface-active phospholipid adsorbed to the surface. Phospholipids may also be utilised as a physical barrier to back-diffusion of acid by lining intracellular canaliculi and oxyntic ducts where other defence mechanisms are absent.  相似文献   

MOSAIC,CHLOROSIS AND NECROSIS IN VIRUS-INFECTED PERENNIAL PEPPER CAUSED DIRECTLY BY PRODUCTS OF A DERANGED METABOLISM     

McKinney HH  Hills CH 《Science (New York, N.Y.)》1941,94(2442):372-373

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Distribution of circulation rates within a single tissue type     

B A Hills 《Science (New York, N.Y.)》1967,157(3791):942-943

An analysis is undertaken to determine the continuous distribution of circulation rates which would be necessary for a single tissue type to display a simple exponential response for the exchange of a solute with blood. It is shown that there can be no more than one real solution. This indicates that heterogeneous circulation cannot be invoked to explain anomalies to the popular assumption that blood perfusion is the process limiting the rate of blood-tissue exchange.  相似文献   

Biologically active compounds in orchid fragrances     

Dodson CH  Dressler RL  Hills HG  Adams RM  Williams NH 《Science (New York, N.Y.)》1969,164(3885):1243-1249

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Telecommunications in alaskan villages     

Hills A  Morgan MG 《Science (New York, N.Y.)》1981,211(4479):241-248

A recently installed satellite system now provides modern long-distance telecommunication services to 100 rural Alaskan villages, most of whose residents are Alaska Natives. In most villages no local telephone or television distribution facilities have yet been installed. Local telephone exchange service appears to be economically marginal unless modest regulatory changes are made. Television delivery presents more difficult problems involving technical and organizational structure. If, after weighing the potential social and cultural effects, village residents elect to acquire television, a delivery system based on low-power transmitters in the villages, local government as the basic organizational and economic unit, and a statewide nonprofit service organization, is the feasible system best suited to village needs.  相似文献   

Chemical facilitation of thermal conduction in physiological systems     

B A Hills 《Science (New York, N.Y.)》1973,182(114):823-825

Experimental evidence supports the concept that solutes capable of reversible chemical reaction can passively facilitate thermnal conduction within their solutions. Myoglobin and bicarbonate are suggested as energy carriers in muscle, having the combined capacity for conveying all waste metabolic heat produced under normal physiological conditions. The concept is extended to convective heat transfer in vivo; this implicates hemoglobin.  相似文献   

Surface-active phospholipid (surfactant) in equine tendon and tendon sheath fluid     

Mills PC  Hills Y  Hills BA 《New Zealand veterinary journal》2005,53(2):154-156

AIM: To investigate the presence of surface-active phospholipid (SAPL, or surfactant) in equine tendon and tendon sheath fluid. METHODS: The left front flexor tendon and sheath were removed from five Thoroughbred horses. Phospholipid was extracted from tendon sheath fluid using Folch reagent and quantified using spectroscopy. Transmission electron microscopy (TEM) was used to observe the tendon surfaces. RESULTS: The presence of phospholipid (90.6 (SD 4.3) microg/ml) in tendon sheath fluid, plus the appearance of oligolamellar layers and lamellar bodies on the tendon surface were indicative of SAPL. CONCLUSIONS: Evidence of SAPL was found in equine tendon, and may have a similar lubricating function as reported for synovial joints. CLINICAL RELEVANCE: These findings may have important implications for normal tendon function and possible therapeutic adjuncts for tendon and tendon sheath injuries.  相似文献