Journal
FOOD CHEMISTRY
Volume 106, Issue 3, Pages 1077-1084Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2007.07.028
Keywords
surimi gel; gel weakening; proteinase; whey; gel strength
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Effects of whey protein concentrate (WPC) on autolysis inhibition and gel properties of surimi produced from bigeye snapper (Priacanthus tayenus), goatfish (Mulloidichthys vanicolensis), threadfin bream (Nemipterus bleekeri) and lizardfish (Saurida tumbil) were investigated. WPC (0-3%) showed inhibitory activity against autolysis in all surimi at both 60 and 65 degrees C in a concentration-depen dent manner. Myosin heavy chain (MHC) of surimi was more retained in the presence of WPC. Breaking force and deformation of kamaboko gels of all surimi increased as added levels of WPC increased (P < 0.05). This was associated with lower levels of protein degradation, as evidenced by the decrease in trichloroacetic acid-soluble peptide content (P < 0.05). WPC at 3% (w/w) significantly decreased the whiteness of gels. However, water-holding capacity of kamaboko gels was improved with increasing concentration of WPC. The microstructure of surimi gels generally became denser with the addition of WPC. (c) 2007 Elsevier Ltd. All rights reserved.
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