from the technical grade monostearin absorb less moisture than do the products made from the purer or molecularly distilled monostearin.Comparison of Permeability of Films of Acetostearin Products and Other Types of Coating Materials. There apparently are no data in the literature on the permeability of fats and fatlike products to moisture, but data are available for many other organic compounds. To provide a basis for comparing acetostearin products and other organic compounds, some of the literature data are reproduced in Table V7. The permeability constants shown were recalculated to conform to the dimensions used in the present investigation.It is evident from Tables III and V that the permeability constant for the acetostearin films is less than that of cellulose acetate and only slightly greater than that of nylon, ethylcellulose, polystyrene, and soft vulcanized rubber.

Because carotene stabilization in alfalfa meal is an important problem and because 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline had proved to be an effective antioxidant, a study was made of the ability of certain related chemicals to inhibit oxidation of carotene. The compounds tested were chosen to permit observation of variation in activity with systematic variation in structure. Several were effective in both dehydrated alfalfa meals and mineral oil solutions.