R J Collier
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Explore the profile of R J Collier including associated specialties, affiliations and a list of published articles.
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332
Citations
7917
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Recent Articles
11.
Xiao Y, Rungruang S, Hall L, Collier J, Dunshea F, Collier R
J Dairy Sci
. 2017 Feb;
100(5):4025-4037.
PMID: 28237583
The objective of this study was to investigate the direct effects of feed supplements niacin and betaine on the heat shock responses of in vitro cultured cells derived from bovine...
12.
Hall L, Dunshea F, Allen J, Rungruang S, Collier J, Long N, et al.
J Dairy Sci
. 2016 Oct;
99(12):9745-9753.
PMID: 27720159
Betaine (BET), a natural, organic osmolyte, improves cellular efficiency by acting as a chaperone, refolding denatured proteins. To test if dietary BET reduced the effect of heat stress (HS) in...
13.
Smith J, Bradford B, Harner J, Potts J, Allen J, Overton M, et al.
J Dairy Sci
. 2015 Dec;
99(2):1495-1500.
PMID: 26709168
A trial was performed to assess the effect of evaporative pads on core body temperature (CBT) and lying behavior of lactating Holstein cows housed in cross-ventilated freestall facilities in a...
14.
Ortiz X, Smith J, Villar F, Hall L, Allen J, Oddy A, et al.
J Dairy Sci
. 2015 Sep;
98(12):8710-22.
PMID: 26409968
Efficacy of 2 cooling systems (Korral Kool, KK, Korral Kool Inc., Mesa, AZ; FlipFan dairy system, FF, Schaefer Ventilation Equipment LLC, Sauk Rapids, MN) was estimated utilizing 400 multiparous Holstein...
15.
Alex A, Collier J, Hadsell D, Collier R
J Dairy Sci
. 2015 May;
98(7):4439-48.
PMID: 25981061
Milking frequency is known to affect milk production and lactation persistence in dairy cows. Despite this, the mechanisms underlying this effect are only partially understood. Previous work in dairy cows...
16.
Kahl S, Elsasser T, Rhoads R, Collier R, Baumgard L
Domest Anim Endocrinol
. 2015 Mar;
52:43-50.
PMID: 25804834
The objective of this study was to evaluate in cattle, the effects of acute exposure to a heat stress (HS) environment on the status of the pituitary (thyrotropin, TSH)-thyroid (thyroxine,...
17.
Ortiz X, Smith J, Rojano F, Choi C, Bruer J, Steele T, et al.
J Dairy Sci
. 2014 Dec;
98(3):1759-71.
PMID: 25547297
Cooling systems used to reduce heat stress in dairy operations require high energy, water usage, or both. Steady increases in electricity costs and reduction of water availability and an increase...
18.
Allen J, Hall L, Collier R, Smith J
J Dairy Sci
. 2014 Dec;
98(1):118-27.
PMID: 25468707
Cattle show several responses to heat load, including spending more time standing. Little is known about what benefit this may provide for the animals. Data from 3 separate cooling management...
19.
Rungruang S, Collier J, Rhoads R, Baumgard L, de Veth M, Collier R
J Dairy Sci
. 2014 Jun;
97(8):5023-34.
PMID: 24881789
Twenty-four multiparous high-producing dairy cows (40.0±1.4kg/d) were used in a factorial design to evaluate effects of 2 environments [thermoneutral (TN) and heat stress (HS)] and a dose range of dietary...
20.
Collier R, Bauman D
J Anim Sci
. 2014 Mar;
92(4):1800-7.
PMID: 24663163
The 20 yr of commercial use of recombinant bovine somatotropin (rbST) in the United States provide the backdrop for reviewing the outcome of use on human health issues by the...