| 摘要 |
Tannin (including tannic acid) has been found to possess food preserving qualities. The invention provides the use of tannin as, or as a constituent of, a foodstuff preservative. A preservative may comprise tannin in powdered form, a solution of tannin in water, or may be a preparation containing tannin. Such preparations include complexes formed by the precipitation of tannin with certain non-toxic substances including gums, proteins, collagen, albumen, and, in particular, gelatine. The preparations also include mixtures of tannin and certain gums. These complexes and mixtures may be applied to foodstuffs, and in particular meat, in the form of a film or coating and may preserve meat at room temperatures thus enabling considerable energy savings to be achieved. The complexes, in addition to having preserving properties are hard and moisture resistant. The tannin-gelatine complex has been used as a meat analog and as a savoury chewing gum. |
