Zobrazeno 1 - 10 of 111 pro vyhledávání: '"R L Preston"'
1
PSII-6 Performance based NEm requirement adjustment for heifers fed during winter months in eastern South Dakota compared to the Texas panhandle
Autor: Robbi H Pritchard, R L Preston, Wyatt N Smith, Wesley W Gentry, E. J. Blom, Zachary K Smith
Publikováno v: J Anim Sci
Crossbred beef heifers [n = 96; initial shrunk BW=238 kg (SD 21.5)] were used in a completely randomized design to evaluate climatic effects on feedlot heifer growth and efficiency. The study was conducted from November 8, 1991 to May 11, 1992. Heife
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f1ca5ee82ff5ecfd0e0e06a3f6053ec2
https://doi.org/10.1093/jas/skz122.401
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4
Factors influencing bacterial attachment to the ruminal epithelium in vitro
Autor: R L Preston, Qingxiang Meng
Publikováno v: The Journal of General and Applied Microbiology. 44:35-41
Some factors influencing bacterial attachment to the rumen epithelium were studied in vitro using mixed rumen bacteria (upper- or lower-layer bacteria formed at bacterial sediment by centrifugation), isolated from steers fed a roughage diet, and rume
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2aec861f1eae998a0cfd95211f1ebd87
https://doi.org/10.2323/jgam.44.35
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5
Evidence for existence of lectins on the ruminal bacteria from steers fed roughage and concentrate diets
Autor: R L Preston, Qingxiang Meng
Publikováno v: The Journal of General and Applied Microbiology. 43:81-87
Mixed rumen bacteria, isolated by centrifugation from the rumen of steers fed a roughage (R) or concentrate (C) diet, were used to determine if lectins are present on rumen bacteria, based on hemagglutination (HA) and HA inhibition assays in vitro. R
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aad3c868c5b2c50db4e8663064eb262e
https://doi.org/10.2323/jgam.43.81
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6
Performance, carcass yield, and carcass quality characteristics of steers finished on rhizoma peanut (Arachis glabrata)-tropical grass pasture or concentrate
Autor: L. L. Bennett, M. J. Williams, W. E. Kunkle, A. C. Hammond, M. F. Miller, D. D. Johnson, R L Preston
Publikováno v: Journal of Animal Science. 73:1881-1887
Steers (n = 156) finished on rhizoma peanut (Arachis glabrata Benth.)-tropical grass pasture in Florida and slaughtered at Central Packing, Center Hill were compared with steers (n = 152) finished on a concentrate diet in Texas and slaughtered at Exc
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9507d4bb54a112438f697eb04a30368
https://doi.org/10.2527/1995.7371881x
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7
Comparative effectiveness of somatotropin and anabolic steroids in feedlot steers2
Autor: R L Preston, Thomas Richard Kasser, Clifton A. Baile, S J Bartle, J J Veenhuizen, Jeffrey Wilson Day
Publikováno v: Journal of Animal Science. 73:1038-1047
Crossbred steers (n = 252, BW = 379 +/- 28 kg) were allotted to 42 pens in a 2 x 3 factorial arrangement of treatments: control or steroid implant (STR; estradiol benzoate+progesterone [three lighter blocks reimplanted on d 84] and trenbolone acetate
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f4a443bd8ae02d93f5cf309cf6eb896a
https://doi.org/10.2527/1995.7341038x
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8
Data integrity-conduct of clinical investigations: university investigator perspective
Autor: R. D. Boyd, Brian A Crooker, R. L. Preston
Publikováno v: Journal of Animal Science. 73:622-627
Clinical investigations are studies designed to evaluate the effectiveness of a new animal drug. Expectations for documentation of events occurring during clinical investigations have been greatly increased. The Food and Drug Administration (FDA) thr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61acb61c4bb248b54d6e290fd51f13dd
https://doi.org/10.2527/1995.732622x
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9
Dietary energy source and density: effects of roughage source, roughage equivalent, tallow level, and steer type on feedlot performance and carcass characteristics
Autor: R L Preston, M. F. Miller, S J Bartle
Publikováno v: Journal of Animal Science. 72:1943-1953
The effects of roughage level (10, 20, or 30% roughage equivalent [RE]), roughage source (alfalfa vs cottonseed hulls), roughage regimen (constant RE vs 2% RE during the mid-finishing period), tallow level (1.2 vs 4.6%), and steer type (British cross
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4528969bc1488f1f976870c6d0c8af69
https://doi.org/10.2527/1994.7281943x
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10
Corn supplementation of lambs grazing alfalfa
Autor: C. P. Brown, T. P. Karnezos, R L Preston, A. G. Matches
Publikováno v: Journal of Animal Science. 72:783-789
We investigated the effects of supplementing Rambouillet x Suffolk wether lambs grazing irrigated 'Cimarron' alfalfa (Medicago sativa L.) with three levels (0 [C0], 123 [C123], and 247 [C247] g of DM.lamb-1.d-1) of cracked corn. Each treatment group
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15739dc91024413f06184e05d3244908
https://doi.org/10.2527/1994.723783x
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