Abstract
The objective of this work was to extract gelatin from skin of channel catfish (Ictalurus punctatus) and to study its functional properties and application in ice-cream and beer. SDS-PAGE patterns showed that channel catfish gelatin (CCG) had more high molecular weight components (β and γ chains) than had calf bone gelatin (CBG). The viscosity of CCG was 42mPa.s at 10°C, which was three times more than that of CBG. Compared to CBG, CCG presented higher emulsion capacity and stability, as well as higher foaming stability. CCG conferred the ice-cream samples and beer with better mouth feel and clarification effect, respectively. The results indicated that CCG had great potential to be utilized in the food industry.
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