Abstract:
This study aimed at comparing the quality of protein phdrolysate derived from meat of undersized abalones Hl. asinine and viscera. The extracted protein was decided to be used as a food flavor. The first part of the experiment dealt with determining the optimal temperature and pH for hydrolysis by Flavourzyme 500L, an enzyme used to digest the meat and the viscera of abalones. The enzyme of 1% concentration (by the weight of the abalone) was employed with varying temperatures of 40 C, 50 C and 60 C at pH 5.0, 6.0, and 7.0 for one hour. Statistical analysis result showed that the temperature and pH significantly after the degree of hydrolysis (DH) with p<0.05. The result also suggested that the optimal condition for the digestion was at 60 C and pH 6.0. With this optimal condition, the enzyme yielded the highest DH value. Furthermore, when the amount of total amino acids in the protein hydrolysate was analyzed, this optimal condition yielded the highest amount of amino acids. As for the flavor and tasted, the amount of amino acids contributing to this aspect was yielded more in this condition as well. The amino acid creating the bitter taste was released more in this condition. However, the amino acids creating the flavor and good taste of abalone were much more higher. Hence, this hydrolytic condition was chosen to be used determine the optimum digestion time. The digestion was allowed to last for 30, 60, 90 120 and 180 minutes (at 60 C and pH 6.0). The result showed that the hydrolysis time significantly alter the degree of hydrolysis (DH) with p <_0.05. There was the highest release of protein hydrolysate with the 180 minute duration. However, the sensory analysis result suggested that 90 and 60 minute durations created the best flavor and taste. Lastly, the physical and chemical composition of protein hydrolysate from the meat and the viscera was compared. There were significant differences in the amount of AMP, volatile compounds, total nitrogen, color (L*, a*, b*) and turbidity. On the other hand, the amount of sodium chloride, density, pH, total soluble solids and viscosity were relatively the same.