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Author

L.J. Spicer

Oklahoma State University, United States
1 article in our journals

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Research ArticleOpen accessEffect of Exposure to Various Durations of Light on Serum Insulin-Like Growth Factor-I in Prepubertal Holstein HeifersL.J. Spicer, B.A. Buchanan, L.T. Chapin, H.A. TuckerOur objective was to determine if prolonged exposure to various durations of light (i.e., photoperiod) would affect serum IGF-I concentrations in heifers. Thus, 16 Holstein heifers, 2 to 4 mo of age, were exposed during a 5-wk pretreatment period to 12 h of cool-white fluorescent light (L) at an intensity of 1200 lux and 12 h of dark (D). At … …American Journal of Animal and Veterinary Sciences, Vol. 2, Issue 2 · 30 Dec 2007 · 6,673 accessesView PDFCite