COMPARATIVE EVALUATION OF AN ULTRAVIOLET AND AN ORTHOCHROMATIC RARE-EARTH IMAGING SYSTEM FOR VETERINARY RADIOGRAPHY     

Charles R.  Pugh  DVM  MS  Jeffrey A.  Wortman  VMD  PhD  H. Mark  Saunders  VMD  Darryl N.  Biery  DVM  W. Harker  Rhodes  VMD  MS  Sydney M.  Evans  VMD  MS  Lynn M.  Walker  VMD  Pamela  Green  DVM  Rosa  Mendez-Aguillar  DVM  Joan  Regan  VMD 《Veterinary radiology & ultrasound》1995,36(6):485-492

The relative quality and speed of a new ultraviolet-emitting screen, ultraviolet-sensitive film rare-earth system (DuPont Ultra-Vision®) was compared to an orthochromatic rare-earth system (Kodak Lanex®) in a clinical trial. Seven different sets of radiographs of a human foot phantom, or actual canine anatomical structures (tarsus, pelvis, skull, chest, abdomen) were evaluated independently by radiologists, radiology residents and technicians who were unaware of the screen/film combinations used. The 400-speed, Ultra-Vision® Rapid/UVG screen/film combination produced supervisor image detail compared to blue/green emitting 400 and 200-speed screen/film combinations. The image detail of the Ultra-Vision® Rapid/UVG system was nearly equivalent to that produced using a 100-speed, fine-detail blue/green emitting screen/film combination. A 200-speed Ultra-Vision® system was also tested and produced thoracic and abdominal radiographs of equivalent to slightly supervisor quality than those produced using blue/green emitting system.  相似文献   

The role of cultivated pastures in milk production in South Africa     

C.A.H. Heard 《African Journal of Range and Forage Science》2013,30(1):108-112

A brief survey of existing methods of milk production in the Republic of South Africa is made, together with an appreciation of the role and importance of established pastures in relation to these. The cost of milk is discussed in relation to two roughage plans; the one being based on ordinarily accepted methods of roughage provision, and the other on roughage produced under intensive methods of grass farming where a high fertilizer regime is employed. High‐producing cows are more economic than low‐producing cows. So too, is a high‐level pasture fertilizing regime, except where cows have a very low inherent production.  相似文献   

In defence of the veterinary profession     

Darryl Rawlings 《The Canadian veterinary journal. La revue veterinaire canadienne》2013,54(12):1106

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TRACHEAL AND LARYNGEAL TUMORS IN THE DOG AND CAT: LITERATURE REVIEW AND 13 ADDITIONAL PATIENTS   总被引：1，自引：0，他引：1  

Carol H.  Carlisle  MVSc  Darryl N.  Biery  DVM  MS  Donald E.  Thrall  DVM  PhD 《Veterinary radiology & ultrasound》1991,32(5):229-235

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Pathological lesions associated with the "leg weakness" syndrome in pigs     

P G Bullough  T W Heard 《The British veterinary journal》1967,123(7):305-310

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Multiplication of Salmonella in liquid feed and its influence on the duration of excretion in pigs     

A H Linton  N E Jennett  T W Heard 《Research in veterinary science》1970,11(5):452-457

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Phytoplankton calcification in a high-CO2 world   总被引：1，自引：0，他引：1  

Iglesias-Rodriguez MD  Halloran PR  Rickaby RE  Hall IR  Colmenero-Hidalgo E  Gittins JR  Green DR  Tyrrell T  Gibbs SJ  von Dassow P  Rehm E  Armbrust EV  Boessenkool KP 《Science (New York, N.Y.)》2008,320(5874):336-340

Ocean acidification in response to rising atmospheric CO2 partial pressures is widely expected to reduce calcification by marine organisms. From the mid-Mesozoic, coccolithophores have been major calcium carbonate producers in the world's oceans, today accounting for about a third of the total marine CaCO3 production. Here, we present laboratory evidence that calcification and net primary production in the coccolithophore species Emiliania huxleyi are significantly increased by high CO2 partial pressures. Field evidence from the deep ocean is consistent with these laboratory conclusions, indicating that over the past 220 years there has been a 40% increase in average coccolith mass. Our findings show that coccolithophores are already responding and will probably continue to respond to rising atmospheric CO2 partial pressures, which has important implications for biogeochemical modeling of future oceans and climate.  相似文献   

Parasites and symbionts of wild mud crabs Scylla serrata (Forskal) of potential significance in aquaculture     

Darryl A. Hudson  Robert J. G. Lester 《Aquaculture (Amsterdam, Netherlands)》1994,120(3-4):183-199

A total of 130 wild mud crabs, Scylla serrata, from Moreton Bay, Queensland, were examined to determine if there were parasites or symbionts that could cause problems in aquaculture. Of 10 parasites and symbionts found, four were potential pathogens. The blood protozoan, Haematodinium sp. is similar to parasites that have killed crabs else-where. The ciliates, Epistylis sp. and Acineta sp., and the barnacle, Octolasmis cor. were common on the gills and may increase stress through respiratory distress. Both of the ciliates showed seasonality, with Epistylis sp. abundant in summer and Acineta sp. abundant in winter. Haematodinium sp. was present at low prevalence throughout the year. The prevalence of Octolasmis cor was significantly higher in female crabs than in males. Mean intensity was positively correlated with crab size for O. cor and for the metacestode of Polypocephalus sp. The prevalence of Epistylis sp. and the barnacle, Chelonibia patula, varied with the moult stage of the crab.  相似文献   

Incorrect veterinary certification     

T W Heard 《The Veterinary record》1988,122(21):519-520

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Urethral incarceration and colonic obstruction caused by vaginal leiomyoma in a margay     

G V Kollias  R L Goring  D A Hager  A Stampley  D Heard 《Journal of the American Veterinary Medical Association》1986,189(9):1207-1208

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