الخلاصة

Abstract The Protein concentrations had been Industrialized from Sparus aurala fishes by using biological method (T3) , which included digestion of samples of crumbled fishes by protease enzyme which was derived from the leaves of Calotropis procera at protein rate 0.1% . The results were compared with a chemical treatment (T2) using acidic medium from buffar acetate concentrate 0.2N in order to active innate enzymes ( cathpesines) as well as the control treatment (T1) by utilizing distilled water and sorbic acid was added as conserve a substance . The chemical structure of fresh fishes had been determined since it get to 17.7% protein ,4.1% lipid , 76.2% moisture and 1.4% ash ,for the three treatments (T1 , T2 , T3) , since the protein portion get to (78.12 , 83.47 , 85.58)% the lipid portion get to (1.58 , 0.73 , 0.52)% the moisture portion get to ( 12.3 , 7.0 , 4.7)% the ash portion get to (5.3 , 6.2 , 6.6 )% respectively , and the degree of hydrolysis (8.92 , 31.07 , 82.50)% for all treatments respectively . The functional properties for industrialized products had been estimated which included the solubility that reach (3.8 , 82.2 , 90.3)% and absorpidity that get to (0.4 , 0.8 , 2.0)% gm/ ml respectively , the emulsification ability was suitable for (T2 , T3) after 24 hour