Biochemical Properties of Fish Protein Isolate (FPI) from Silver Carp (Hypophthalmichthys molitrix) by Application of Acid-Alkali Processes Compared to Traditional Prepared Surimi

Authors
S. A. Jafarpour 1
B. Shabanpour 2
S. Shirvani Filabadi 3
1 Assistant Professor, Sari University of Agricultural Sciences and Natural Resources, Sari, Iran
2 Associate Professor, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
3 Former MSc. Student, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
Abstract
Some Biochemical properties of silver carp surimi prepared by application of acid-alkali aided methods were investigated and compared to that of derived by conventional method. In terms of total protein solubility and recovery, lipid reduction, and total pigment extractability and myoglobin removal there was a significant (P<0.05) difference among the treatments. Acid-aided method showed the most efficiency to recover more proteins (86.2%) in comparison to the alkaline-aided (79.8%) and conventional (76.7%) methods. The lipid reduction percentage was recorded as 43.6%, 58.4% and 72.3% for the conventional method, and acid-alkali aided methods, respectively. In terms of total pigment removal, the conventional method showed higher efficiency (P<0.05) compared to the pH-shifting methods. Conversely, fish protein solubilisation by acid-alkali aided techniques was more efficient (P<0.05) compared to the conventional method of making surimi. In conclusion, pH-shifting techniques were superior in comparison with the conventional method in order to recover more functional proteins and to efficiently reduce the lipid and myoglobin content of resultant fish protein isolate.
Keywords
Acid-alkali solubilisation
Biochemical Properties
fish protein isolate
Silver Carp (Hypophthalmichthys molitrix)
Surimi
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ECOPERSIA
Volume 1, Issue 3 - Serial Number 5
September 2013
Pages 315-327