Mackerel fillets were seasoned with Chinese medicinal meal, treated with or without heat then quick frozen at -80℃, packed and stored at -20℃ for 6 months. From results, coliforms were found negative; total aerobic plate count, histamine contents and pH of the product were found below 6.42 x 103 CFU/g, 5.5 mg⁄100g and 6.0 respectively, during storage. All these indicate that the frozen nutraceutical mackerel products had good stability throughout the 6-month frozen storage. The acid value and volatile basic nitrogen of the frozen raw nutraceutical product were higher than those of the heat treated groups. When the frozen mackerel with Chinese medicinal meal products were thawed after 6-month storage, the sensory evaluation indicated they were not significantly different (P>0.05) each other.
Mackerel fillets were seasoned with Chinese medicinal meal, treated with or without heat then quick frozen at -80℃, packed and stored at -20℃ for 6 months. From results, coliforms were found negative; total aerobic plate count, histamine contents and pH of the product were found below 6.42 x 103 CFU/g, 5.5 mg⁄100g and 6.0 respectively, during storage. All these indicate that the frozen nutraceutical mackerel products had good stability throughout the 6-month frozen storage. The acid value and volatile basic nitrogen of the frozen raw nutraceutical product were higher than those of the heat treated groups. When the frozen mackerel with Chinese medicinal meal products were thawed after 6-month storage, the sensory evaluation indicated they were not significantly different (P>0.05) each other.