Deep tissue mass aspirate from a young German shepherd dog     

Sharkey LC  Gliatto JM  Gallagher JG 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》1999,28(4):147-149

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Perspectives: plant biology. Some like it hot     

Sharkey TD 《Science (New York, N.Y.)》2000,287(5452):435, 437

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Maximizing the diagnostic value of cytology in small animal practice.     

Leslie C Sharkey  Sharon M Dial  Michael E Matz 《Veterinary Clinics of North America: Small Animal Practice》2007,37(2):351-72, vii

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Efficacy of avermectin B₁ given orally against equine intestinal strongyles and Onchocera microfilaria     

TD MOGG †  CC POLLITT  JP WILLMORE  H. THOMPSON ‡ 《Australian veterinary journal》1990,67(11):399-401

Three groups of horses and ponies (N = 13, 13 and 12) were treated with ivermectin paste (0.2 mg/kg p.o.), avermectin B1 solution (0.2 mg/kg p.o.), or fenbendazole suspension (10 mg/kg via nasogastric tube). The avermectin B1 was a 1% solution in a propylene glycolglycerol formal base. Faecal strongyle egg counts were performed before, and 14, 28, 42, 56 and 70 d, after treatment. Full-thickness skin biopsies from the neck, pectoral and umbilical regions were examined for Onchocera microfilaria before treatment, and again 14 and 70 d later. Ivermectin therapy produced a significant (P less than 0.01) decrease in mean strongyle egg counts 14, 28, 42 and 56 d after treatment. Avermectin B1 therapy resulted in significant (P less than 0.01) decreases in mean strongyle egg counts 14, 28 and 42 d after treatment. All horses given ivermectin or avermectin B1 had zero strongyle egg counts 14 and 28 d after treatment. Fenbendazole failed to significantly decrease strongyle egg counts. Both ivermectin and avermectin B1 resulted in zero microfilaria counts in all horses 14 d after treatment. On day 70 the percentage decrease in microfilaria counts were 100% and 99.6% respectively. Fenbendazole failed to significantly decrease microfilaria counts. The oral administration of this formulation of avermectin B1 appeared to be highly efficacious against intestinal strongyles and Onchocera microfilaria. The duration of anti-strongyle activity was, however, significantly (P less than 0.01) shorter than that of ivermectin paste.  相似文献   

Kinetics of leaf temperature fluctuation affect isoprene emission from red oak (Quercus rubra) leaves     

Singsaas EL  Laporte MM  Shi JZ  Monson RK  Bowling DR  Johnson K  Lerdau M  Jasentuliytana A  Sharkey TD 《Tree physiology》1999,19(14):917-924

Because the rate of isoprene (2-methyl-1,3-butadiene) emission from plants is highly temperature-dependent, we investigated natural fluctuations in leaf temperature and effects of rapid temperature change on isoprene emission of red oak (Quercus rubra L.) leaves at the top of the canopy at Harvard Forest. Throughout the day, leaves often reached temperatures as much as 15 degrees C above air temperature. The highest temperatures were reached for only a few seconds at a time. We compared isoprene emission rates measured when leaf temperature was changed rapidly with those measured when temperature was changed slowly. In all cases, isoprene emission rate increased with increasing leaf temperature up to about 32 degrees C and then decreased with higher temperatures. The temperature at which isoprene emission rates began to decrease depended on how quickly measurements were made. Isoprene emission rates peaked at 32.5 degrees C when measured hourly, whereas rates peaked at 39 degrees C when measurements were made every four minutes. This behavior reflected the rapid increase in isoprene emission rate that occurred immediately after an increase in leaf temperature, and the subsequent decrease in isoprene emission rate when leaf temperature was held steady for longer than 20 minutes. We concluded that the observed temperature response of isoprene emission rate is a function of measurement protocol. Omitting this parameter from isoprene emission models will not affect simulated isoprene emission rates at mild temperatures, but can increase isoprene emission rates at high temperatures.  相似文献   

Field measurements of isoprene emission from trees in response to temperature and light     

Sharkey TD  Singsaas EL  Vanderveer PJ  Geron C 《Tree physiology》1996,16(7):649-654

The atmospheric hydrocarbon budget is important for predicting ozone episodes and the effects of pollution mitigation strategies. Isoprene emission from plants is an important part of the atmospheric hydrocarbon budget. We measured isoprene emission capacity at the bottom, middle, and top of the canopies of a white oak (Quercus alba L.) tree and a red oak (Quercus rubra L.) tree growing adjacent to a tower in the Duke University Forest. Leaves at the top of the white oak tree canopy had a three- to fivefold greater capacity for emitting isoprene than leaves at the bottom of the tree canopy. Isoprene emission rate increased with increasing temperature up to about 42 degrees C. We conclude that leaves at the top of the white oak tree canopy had higher isoprene emission rates because they were exposed to more sunlight, reduced water availability, and higher temperature than leaves at the bottom of the canopy. Between 35 and 40 degrees C, white oak photosynthesis and stomatal conductance declined, whereas red oak (Quercus rubra) photosynthesis and stomatal conductance increased over this range. Red oak had lower rates of isoprene emission than white oak, perhaps reflecting the higher stomatal conductance that would keep leaves cool. The concentration of isoprene inside the leaf was estimated with a simplified form of the equation used to estimate CO(2) inside leaves.  相似文献   

2nd International Symposium on Bluetongue, African Horse Sickness and Related Obiviruses, Paris, 17 – 21 June 1991     

TD ST  GEORGE  GI ALEXANDER  GP GARD 《Australian veterinary journal》1991,68(12):381-382

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Reproductive techniques in sheep.     

S Sharkey  R J Callan  R Mortimer  C Kimberling 《Veterinary Clinics of North America: Food Animal Practice》2001,17(2):435-55, viii

This article reviews current methods of evaluating reproductive performance in the sheep industry. The reproductive technologies of breeding soundness examination, reproductive ultrasonography, estrus manipulation, artificial insemination, and embryo transfer are also extensively discussed. The veterinarian's current and future role in the application of these technologies is discussed.  相似文献   

Infection of cattle in Queensland with bluetongue viruses: I. prevalence of antibodies II. distribution of antibodies     

TD ST  GEORGE LF MELVILLE 《Australian veterinary journal》1995,72(9):358-359

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Evaluation of the efficacy of maduramacin ammonium in combination with roxarsone and avoparcin in caged broiler chickens     

H Berger  D L Sharkey  G O Gale 《British poultry science》1988,29(2):435-438

1. The anticoccidial activity of maduramicin ammonium (5 mg/kg food) administered alone or with roxarsone (50 mg/kg food) and/or avoparcin (10 mg/kg food) was evaluated in battery-reared broilers artificially challenged with recent field culture mixtures containing Eimeria acervulina, E. maxima and E. tenella or E. mivati, E. necatrix and E. brunetti. 2. Maduramicin ammonium exhibited a high degree of anticoccidial activity and the addition of roxarsone and/or avoparcin in food at recommended concentrations did not adversely affect the activity.  相似文献