Storage and mobilization of muscle glycogen in exercising horses fed a fat-supplemented diet     

S.L. Oldham BS  G.D. Potter PhD  J.W. Evans PhD  S.B. Smith PhD  T.S. Taylor DVM  W.S. Barnes PhD 《Journal of Equine Veterinary Science》1990,10(5)

In a switchback experiment, six mature mares were fed a control and a fat-supplemented diet while being exercised in a galloping regimen. After three weeks adaptation to each diet, horses performed an exercise test (ET) consisting of four, 600-m gallops. Muscle biopsies were obtained before and after the ET, and blood samples were taken before, during and throughout recovery from the ET. Resting glycogen concentration in the biceps femoris muscle increased (P<.05) from 15.77 mg/g wet tissue when the horses were fed the control diet to 22.89 mg/g when they were fed the fats-supplemented diet. During the ET, the amount of glycogen mobilized by the muscle increased (P<.05) from 6.99 mg/g when the horses were fed the control diet to 13.09 mg/g when they were fed the fat-supplemented diet. When the horses were fed the fat-supplemented diet, they galloped faster (P<.09), at a constant heart rate, during the last two gallops of the ET. Thus, adapting exercising horses to a fat-supplemented diet increased muscle glycogen concentrations, which appeared to enhance their performance past the anaerobic threshold.  相似文献   

Histopathologic features, environmental factors, and serum estrogen, progesterone, and prolactin values associated with ovarian phase and inflammatory uterine disease in cats.     

D F Lawler  R H Evans  T J Reimers  E D Colby  K L Monti 《American journal of veterinary research》1991,52(10):1747-1753

Forty-four female American Shorthair cats with inflammatory uterine disease or infertility were evaluated. Data collected included age, month of diagnosis, housing, reproductive history, results of bacteriologic culture of uterine specimens, serum concentrations of estrogen, progesterone, and prolactin and histopathologic features of the ovaries and uterus. Histologically, the ovaries of 19 cats were dominated by active or cystic follicles, whereas 25 cats had luteal-phase ovaries. Of the 25 cats with active corpora lutea, 20 had either recently weaned litters (n = 11) without subsequent exposure to a male cat, or had been housed individually for lengthy periods (n = 9). The finding of active corpora lutea under these circumstances indicates that in queens, ovulation may occur by mechanisms not involving coitus. Prominent, active corpora lutea on the ovaries were associated with adenomatotic proliferative changes in the superficial and glandular epithelium of the uterus and with myometrial hyperplasia, compared with the uterus of cats with follicular ovaries (P less than 0.01). Serum progesterone concentration greater than or equal to 1.87 ng/ml was consistently associated with luteal-phase ovaries. Serum progesterone values less than or equal to 0.15 ng/ml were consistently associated with follicular-phase ovaries. Escherichia coli was the organism most commonly isolated from uterine contents.  相似文献   

Rill erosion in contrasting landscapes     

R. Evans 《Soil Use and Management》1992,8(4):170-175

Abstract. The data from the national project to monitor water erosion has mostly been treated in an aggregate form, because in many of the monitored transects in any year too few fields were eroded for the data to be split into its component parts. However, in crop year 1983 erosion affected enough fields in two localities with contrasting soils for their data to be compared. Rainfall patterns in the two localities were similar. The transects covered a sandland area in Nottinghamshire and an area of clayland in and on the margins of Bedfordshire. Compared with the clayland, rilling of the sandland was widespread, related to the greater range of crops grown there, and more severe. On clayland, rills were mainly confined to valley floors, and slopes flanking these valleys generally had lower gradients than those on the sandland. On sandland, slopes were steeper in eroded fields drilled to winter cereals than they were in fields planted to potatoes or sugarbeet. Such field- based studies hint at the complex interactions of rain falling on a cropped field. Erosional thresholds are not static. The areas of fields affected by erosion and deposition were mostly very small. This helps us understand why the farmer often considers erosion unimportant.  相似文献   

Dry cow therapy     

J M Evans  A M Harris  M J Marshall  K E Pugh 《The Veterinary record》1972,90(19):542-543

  相似文献   

Calcium and magnesium absorption in growing cattle as influenced by age of animal and source of dietary nitrogen     

M A Garces  J L Evans 《Journal of animal science》1971,32(4):789-793

  相似文献   

Intramuscular injection in the cat     

J S Baxter  J M Evans 《The Journal of small animal practice》1973,14(5):297-302

The commonly adopted technique and site for intramuscular injection in the cat are described, and the often resulting inadequacy and risk are discussed. An alternative site and technique are suggested to ensure a more reliable effect when an intramuscular injection is indicated. Résumé. On décrit la technique et l'endroit communément adoptés pour injection intramusculaire chez le chat et on discute de l'imperfection et du risque qui résultent souvent. On suggère un endroit alternatif et technique pour s'assurer d'un effet certain quand une injection intramusculaire est indiquée. Zusammenfassung. Die gewǒhnlish angewendete Technik und Stelle fur intramuskulàre Injektionen in Katzen sind beschrieben und das oft folgende Versagen und Risiko wird diskut-iert. Eine andere Stelle und Technik sind vorgeschlagen, um einer zuverlǎssigeren Wirkung sicher zu sein wenn eine intramuskulàre Injektion erforderlich ist.  相似文献   

Letter to the Editor     

K. G. D. Evans  M.R.C.V.S. 《The Journal of small animal practice》1962,3(1):25-25

  相似文献   

The influence of intrauterine saline infusion on luteal function and cyclic ovarian activity in the mare     

P Neely  J P Hughes  G H Stabenfeldt  J W Evans 《Equine veterinary journal》1974,6(4):150-157

  相似文献   

Genetic analysis of Lolium. I. Identification of linkage groups and the establishment of a genetic map   总被引：3，自引：0，他引：3  

M. D. Hayward    J. W. Forster    J. G. Jones    O. Dolstra    C. Evans    N. J. McAdam  K. G. Hossain    M. Stammers    J. Will    M. O. Humphreys  G. M. Evans 《Plant Breeding》1998,117(5):451-455

A genetic map of Lolium has been produced using isozyme, restriction fragment length polymorphism (RFLP) and random amplified polymorphic DNA (RAPD) markers applied to a segregating family derived from an F₁ hybrid plant of L. perenne × L. multiflorum provenance, crossed on to a doubled haploid L. perenne. A total of 106 markers, out of a total of 160 polymorphic loci analysed, have been ascribed to seven linkage groups covering a map distance of 692cM, Two of these groups may be allocated to chromosomes 2 and 6 of the Lolium genome. The remaining unallocated markers, the majority of which showed severe segregation distortion, could be associated into small groups of two or three markers which showed no linkage with the main groups at a LOD of 2.8 or, if associated, could not be mapped in a satisfactory manner. This high incidence of disturbed segregations could be accounted for by the use of an interspecific hybrid between two species of differing genome size, with consequent cytological imbalance.  相似文献   

Double-stocking for overcoming damage to conifer seedlings by pocket gophers     

Richard M. Engeman  Richard M. Anthony  Victor G. Barnes Jr  Heather W. Krupa  James Evans 《Crop Protection》1998,17(9):687-690

A 5-yr study was conducted on national forests in Idaho and Oregon to evaluate how doubling the seedling stocking rate of lodgepole pine (Pinus contorta) would relate to 5-year survival and the uniformity of distribution of seedlings in the presence of northern pocket gopher (Thomomys talpoides) damage. Either 4 or 8 seedlings were planted in 40-m² subplots (1000 or 2000 seedlings/ha) and monitored for gopher damage. We found that the number of seedlings attacked by gophers, and consequently, the number of seedlings surviving for 5 years, were directly proportional to the stocking rate, but the consistency of seedling distribution within each site (as measured by the proportion of 40-m² subplots with ≥ 2 surviving seedlings) did not double with stocking rate. In some situations, increasing the stocking rate should be considered as a method for overcoming pocket gopher damage.  相似文献