| Popis: |
WORK which has been reported on the stability of vitamin A shows that there is a substantial loss of this factor in chick rations and feed ingredients when these are stored under ordinary conditions for various lengths of time. However, there is considerable disagreement as to the amount of destruction or how rapidly such destruction takes place. Fraps and Treichler (1933) reported losses in vitamin A potency of 30–80 percent in 6 to 19 months in alfalfa leaf meal, dried black-eyed peas, dried green sweet peppers, yellow corn (whole or ground), and powdered whole milk. Kick and Bethke (1929) reported very little, if any, destruction of vitamin A in yellow corn (whole, cracked, or finely ground) when stored for one year. Record, Bethke, and Wilder (1937) stated there was a loss of vitamin A from cod liver oil and carotene from alfalfa leaf meal when mixed in a ration, . . . |
