Extraction of an ulcer-preventing principle from oat hulls     

K A Seether  T S Miya  T W Perry  P N Boehm 《Journal of animal science》1971,32(6):1160-1163

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Injectable iron for beef cattle     

T W Perry  W H Smith  W M Beeson  R C Peterson  M E Heath  D Webb  C H Nickel 《Journal of animal science》1967,26(1):106-109

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Infectious diseases of livestock with special reference to southern Africa J.A.W. Coetzer, G.R. Thomson and R.C. Tustin (editors), Oxford University Press, 1994, 2 vols, 1,605 + viiipp, $245.00, ISBN 0-1957-0506-8     

Brian Perry 《Preventive veterinary medicine》1996,27(3-4):237-241

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Acute diarrhea in horses of the Potomac River area: examination for clostridial toxins   总被引：3，自引：0，他引：3  

M Ehrich  B D Perry  H F Troutt  R W Dellers  R A Magnusson 《Journal of the American Veterinary Medical Association》1984,185(4):433-435

Fecal specimens from horses in Montgomery County, Md, and in Fairfax and Loudoun counties, Va, were examined for Clostridium perfringens type A enterotoxin and for C difficile cytotoxin (92 and 108 specimens, respectively). The toxins were found in feces from horses that had experienced an acute diarrhea syndrome and from clinically normal horses. The toxins did not appear to be primary determinants of the diarrhea syndrome, although they may have contributed to the spectrum of clinical entities observed.  相似文献   

The Formation and History of the World Mariculture Society, 1969–1986     

James W.  Avault  Jr.  W. Guthrie  Perry  Jr. 《Journal of the World Aquaculture Society》1986,17(1-4):64-71

On January 20, 1986, at the annual meeting of the World Mariculture Society in Reno, Nevada, Dr. Guido Persoone, President, announced that the name of the World Mariculture Society would be changed to World Aquaculture Society. Eightyeight percent of voting members favored the change. What follows, then, is an historical account of the World Mariculture Society, 1969–1986. We have used as references archives promulgated in the Proceedings and Journals, newsletter materials, and our own first hand knowledge.  相似文献   

Rate of discharge and morphology of sweat glands in the perineal, lumbodorsal and scrotal skin of cattle     

N.B. Blazquez  S.E. Long  T.M. Mayhew  G.C. Perry  N.J. Prescott  C. Wathes   《Research in veterinary science》1994,57(3):285

The rates of evaporation of moisture from the skin in the lumbodorsal, perineal and scrotal regions of cattle were measured in thermoneutral and high environmental temperatures. The rates of evaporation from the perineal and scrotal regions of heifers and bulls were significantly (P<0–001) greater than those from the lumbodorsal areas. The lumbodorsal rate of evaporation increased significantly (P<0·001) when cows and bulls were transferred from a thermoneutral to a hot environment and the rate of evaporation from the scrotum of bulls showed a similar increase; the rate of evaporation from the perineum of cows increased to a smaller extent (P<0·05) under the same conditions. The rate of evaporation from the perineum of cows reached a maximum on the day of oestrus but the stage of the oestrous cycle had no effect on the lumbodorsal rate of evaporation.  相似文献   

The use of climate data interpolation in estimating the distribution of Amblyomma variegatum in Africa     

R.A.I. Norval  B.D. Perry  R. Kruska  K. Kundert 《Preventive veterinary medicine》1991,11(3-4):365-366

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Effects of supplemental enzymes on nitrogen balance, digestibility of energy and nutrients and on growth and feed efficiency of cattle   总被引：1，自引：0，他引：1  

T W Perry  E D Purkhiser  W M Beeson 《Journal of animal science》1966,25(3):760-764

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Alberta. Herpesvirus-like viral infection in a rabbit   总被引：1，自引：0，他引：1       下载免费PDF全文

Swan C  Perry A  Papp-Vid G 《The Canadian veterinary journal. La revue veterinaire canadienne》1991,32(10):627-628

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Effect of size and timing of photoperiod increase on age at first egg and subsequent performance of two breeds of laying hen     

P. D. Lewis  G. C. Perry  T. R. Morris 《British poultry science》1997,38(2):142-150

1. ISA Brown and Shaver 238 pullets were changed from 8 h to 8, 10, 13 or 16 h photoperiods at 42, 63, 84, 105, 126 or 142 d of age.

2. Age at first egg (AFE) was curvilinearly affected by the size and timing of the change in photoperiod. AFE was advanced most by a photoperiod change from 8 to 13 h made at 63 or 84 d. ISA birds were generally more responsive than Shaver to the photoperiod changes.

3. Longer photoperiods significandy increased survivors' egg production, but decreased liveability to 504 d, so that eggs per hen housed were unaffected. Retarding AFE by 10 d reduced survivors' egg numbers by 7.0, but increased mean egg weight by 1.26 g. Egg output by Shaver birds was unaffected by AFE, but that of ISA was curvilinearly affected, with an apogee at an AFE of 135 d. In both breeds, egg weight and egg output were greater following an early or late, rather than a mid‐term photostimulation.

4. Photoperiod significandy increased mean daily food intake during lay by 1.26 g/h. A 10 d retardation in AFE resulted in a reduction in food intake of 1 g/d. Efficiency of food conversion deteriorated according to the square of the photoperiod, and changed curvilinearly according to age at photostimulation. Food conversion efficiency improved by 0.05 g/g for each 10 d delay in AFE.

5. Shell quality was unaffected by AFE, but deteriorated with increasing photoperiod and was curvilinearly affected by age at photostimulation with the smallest shell weights associated with photostimulation at 63 d. The incidence of double‐yolked (DY) egg production increased with photoperiod and decreased with delayed photostimulation. There was an exponential regression of DY eggs on AFE.

6. Body weight at first egg increased by 75 g/d delay in AFE, but body weight at 504 d of age was unaffected by AFE, photoperiod or age at photostimulation. Body weight gain during lay increased by 15 g/h increase in photoperiod, decreased by 6 g per 10 d delay in photostimulation and by 40 g per 10 d delay in AFE. Fat content at 504 d increased by about 10 g/kg and by 23 g/bird for each 10 d delay in AFE.

7. Mortality in lay increased by 0.8%/h increase in photoperiod, but was unaffected by either age at photostimulation or AFE.  相似文献