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Background. Natural antioxidants become increasingly important in fish processing and particularly in the preservation phase of fish raw materials. Some of them can protect lipids, containing essential unsaturated fatty acids. The aim of the present study was to determine antioxidant properties of aqueous extracts of rosemary and sage, compared with the activity of BHA (butylated hydroxyanisole) and...
Freezing followed by frozen storage of Baltic herring at -25°C for a period of 6 months resulted in lowering the activity of lipoxygenase of the muscle tissue down to 78.2% and of the roe-down to 70.0%. The activity of the enzyme, extracted from the muscle tissue, stored in a buffer solution at -10, -18, and -25°C declined in reverse proportion to the increase of the storage temperature. Salting of...
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