Effect of foot paring of sheep affected with footrot on response to zinc sulphatehodium lauryl sulphate foot bathing treatment     

RH CASEY  PAJ MARTIN 《Australian veterinary journal》1988,65(8):258-259

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Cardiopulmonary responses to experimentally induced gastric dilatation in isoflurane-anesthetized dogs.     

D S Hodgson  C I Dunlop  P L Chapman  J L Grandy 《American journal of veterinary research》1992,53(6):938-943

Gastric dilatation was experimentally induced in 6 anesthetized dogs maintained with constant-dose isoflurane in oxygen. An intragastric balloon was used to distend the stomach with a constant 30 mm of Hg pressure for 3.5 hours. The PaCO2 was maintained between 35 and 45 mm of Hg, using intermittent positive-pressure ventilation. Cardiopulmonary measurements prior to stomach distension (baseline) were compared with measurements taken during 0.1, 0.5, 1.0, 1.5, 2.5, and 3.5 hours of stomach distension by analyzing the change from baseline in a randomized-block analysis with each dog as a block. After distending the stomach, cardiac index increased (P less than 0.01) from 1.5 to 3.5 hours. Stroke volume did not change, thus the increase in the cardiac index was attributable to an increase in heart rate. During inflation, increases were observed in systemic arterial, pulmonary arterial, and right atrial pressure. Respiratory frequency was unchanged; however, to maintain PaCO2 constant, it was necessary to progressively increase peak airway pressure. Although PaO2 tended to decrease during gastric dilation, the dogs were never hypoxemic. These results indicate that when our methods are used to maintain a constant anesthetic dose of isoflurane in oxygen, an observed increase in cardiovascular performance is expected. This differs from other studies in anesthetized dogs that have shown reduction in cardiovascular performance following gastric dilatation.  相似文献   

Pharmacologic differences between sodium D-lactate and sodium L-lactate in sheep     

V B Braide  R H Dunlop 《American journal of veterinary research》1969,30(8):1281-1288

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Polioencephalomalacia (cerebrocortical necrosis) induced by experimental thiamine deficiency in lambs   总被引：1，自引：0，他引：1  

E J Thornber  R H Dunlop  J M Gawthorne  C R Huxtable 《Research in veterinary science》1979,26(3):378-380

Lesions of polioencephalomalacia (PEM, cerebrocortical necrosis) have been demonstrated in pre-ruminant lambs fed on synthetic, thiamine-free milk. Thiamine deficiency in these lambs was confirmed by transketolase assay.  相似文献   

SPERMATOZOA IN THE EJACULATES OF VASECTOMIZED RAMS     

A. A. Dunlop  M.Agr.Sc.  Ph.D.  G. R. Moule  D.V.Sc. W. H. Southcott  B.V.Sc† 《Australian veterinary journal》1963,39(2):46-48

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Integrated optoelectronic devices based on conjugated polymers   总被引：1，自引：0，他引：1  

H Sirringhaus  N Tessler  RH Friend 《Science (New York, N.Y.)》1998,280(5370):1741-1744

An all-polymer semiconductor integrated device is demonstrated with a high-mobility conjugated polymer field-effect transistor (FET) driving a polymer light-emitting diode (LED) of similar size. The FET uses regioregular poly(hexylthiophene). Its performance approaches that of inorganic amorphous silicon FETs, with field-effect mobilities of 0.05 to 0.1 square centimeters per volt second and ON-OFF current ratios of >10(6). The high mobility is attributed to the formation of extended polaron states as a result of local self-organization, in contrast to the variable-range hopping of self-localized polarons found in more disordered polymers. The FET-LED device represents a step toward all-polymer optoelectronic integrated circuits such as active-matrix polymer LED displays.  相似文献   

Carbon structures with three-dimensional periodicity at optical wavelengths   总被引：1，自引：0，他引：1  

AA Zakhidov  RH Baughman  Z Iqbal  C Cui  I Khayrullin  SO Dantas  J Marti  VG Ralchenko 《Science (New York, N.Y.)》1998,282(5390):897-901

Porous carbons that are three-dimensionally periodic on the scale of optical wavelengths were made by a synthesis route resembling the geological formation of natural opal. Porous silica opal crystals were sintered to form an intersphere interface through which the silica was removed after infiltration with carbon or a carbon precursor. The resulting porous carbons had different structures depending on synthesis conditions. Both diamond and glassy carbon inverse opals resulted from volume filling. Graphite inverse opals, comprising 40-angstrom-thick layers of graphite sheets tiled on spherical surfaces, were produced by surface templating. The carbon inverse opals provide examples of both dielectric and metallic optical photonic crystals. They strongly diffract light and may provide a route toward photonic band-gap materials.  相似文献   

Drugs: their uses and abuses, and the problem of their control     

D Dunlop 《The Veterinary record》1969,85(16):424-429

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Anesthesia of pups and kittens     

J L Grandy  C I Dunlop 《Journal of the American Veterinary Medical Association》1991,198(7):1244-1249

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Developments in veterinary science. Polioencephalomalacia (cerebrocortical necrosis).   总被引：1，自引：1，他引：0       下载免费PDF全文

F M Loew  O M Radostits    R H Dunlop 《The Canadian veterinary journal. La revue veterinaire canadienne》1969,10(2):54-56

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