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Journal of Applied Physiology, Vol 58, Issue 5 1511-1516, Copyright © 1985 by American Physiological Society
ARTICLES |
S. L. Pardue, J. P. Thaxton and J. Brake
This study was conducted to determine if ascorbic acid (AA) 1) increases resistance to high environmental temperature in young chickens and 2) alters heat-induced changes in several physiological responses. Groups of male chicks received either a standard ration containing 1,000 mg/kg (ppm) of AA or the ration without AA. Chicks were brooded for 3 wk and then maintained at 22 +/- 0.8 degrees C. At 4 wk of age, both AA-supplemented and control chicks were exposed to 30 min of heating (43 +/- 0.1 degrees C and 40 +/- 2% rh) on each of 3 consecutive h in an environmentally controlled chamber. Chicks were challenged with sheep erythrocytes (1 ml, 10(5) cells, iv) 12 h postheating. Heating reduced plasma potassium, body weight gain, relative bursa and spleen weights, and anti-sheep erythrocyte levels. Heating increased cloacal temperature, plasma protein, corticosteroid levels, and mortality. AA ameliorated many of these stress-related responses.
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S. J. Pion, E. van Heugten, M. T. See, D. K. Larick, and S. Pardue Effects of vitamin C supplementation on plasma ascorbic acid and oxalate concentrations and meat quality in swine J Anim Sci, July 1, 2004; 82(7): 2004 - 2012. [Abstract] [Full Text] [PDF] |
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