A comparison of acid and enzymic extraction of nicotinic acid from foodstuffs.

McCance, R. A. & Widdowson, E. M. (1947). J . Hyg., Camb., 45, 59. Mitchell, H. H. & Carman, G. G . (1924). J . biol. Chem. 60, 613. ,Mitchell. H. H. & Carman, G. G. (1926). J. biol. Chem. 68, 183. Murlin, J. R., Marshall, M. E. & Kochakian, C. D. (1941). J . Nutn't. 22, 573. Platt, B. S. (1936). Chin. med. 3. 50, 140. Platt, B. S. (1939). Nutrition in the Colonial Empire. London: H. M. Stationery Office. Saki. T. (1930). My Principles of Nutrition. Tokyo. Widdowson, E. M. (1936). 3. Hyg., Camb., 36, 269. Widdowson, E. M. & IMcCance, R. A. (1936). J . Hyg., Camb., 36, 13. '950