Physical and sensory quality of hommos preserved with combined gamma radiation and refrigeration

摘要

Hommos was treated with gamma radiation and stored at 4 degrees C for a period of five weeks with the aim of extending its shelf life under refrigeration. Viscosity and colour of the product were evaluated instrumentally at 5-day intervals, and its sensory quality was evaluated by a taste panel at the beginning and end of the storage period. The results indicate that irradiation combined with storage caused reduction of the Delta E*ab, a*, b* and L* colour values, but have no such an effect on the apparent viscosity, flow behavior index (n) or consistency coefficient (k) of the product which exhibited a non-Newtonian, pseudoplastic behavior. Neither irradiation dose nor storage time affected the overall acceptability, flavor, smoothness, mouth-feel and colour of the product when evaluated by a taste panel. The product irradiated with 1.5 or 2.5 kGy can be stored at 4 degrees C for 35 days and still maintain its sensory and physical qualities indicating that the shelf life of this product, like other irradiated foods, can be extended by this combined treatment.