Shrimp treated with ASS + 3% MSG (pH 11.5) had reduced
drip loss and no AG and NAG activities were detected when
subjected to repeated freeze–thawing. Shear force of both of
raw and cooked shrimp with all treatments increased when
freeze–thaw cycles increased up to 3 cycles, but a drastic
decrease was found after 5 freeze–thaw cycles. Freeze–
thawing caused protein denaturation, tissue disruption and
damage of muscle fiber as indicated by the release of AG and
NAG. Soaking shrimp with 0.75% NaOH containing 2.5% NaCl
and 3% MSG was able to reduce quality changes induced by
freeze–thawing process.