Inhibiting effect of zein film-coating to rancidification of walnut meat

Zein composite film was applied to inhibit oxidation and rancidification of the walnut meat in storage. The results indicated that the zein film coating improved the key quality indexes significantly. Compared with the control the linoleic acid of zein film coated walnut meat increased by 7.44%, peroxide value decreased by 14.50%, saponification value decreased by 3.77%, acid value decreased by 30.66% and shelf-life at 20℃ condition was prolonged 250 days or more. So the zein film coating can effectively inhibit oxidation and rancidification of the walnut meat.