Gelation properties of Alaska pollock surimi as affected by addition of nano-scaled fish bone (NFB) at different
levels (0%, 0.1%, 0.25%, 0.5%, 1% and 2%) were investigated. Breaking force and penetration distance
of surimi gels after setting increased significantly as NFB concentration increased up to 1%. The first peak
temperature and value of storage modulus (G0
), which is known to relate to the unfolding and aggregation
of light meromyosin, increased as NFB concentration increased. In addition, 1% NFB treatment demonstrated
the highest G0 after gelation was completed. The activity of endogenous transglutaminase (TGase)
in Alaska pollock surimi increased as NFB calcium concentration increased. The intensity of myosin heavy
chain cross-links also increased as NFB concentration increased indicating the formation of more
e-(c-glutamyl) lysine covalent bond by endogenous TGase and calcium ions from NFB.
2013 Elsevier Ltd. All rig