Ice-glazing is applied to protect the frozen shrimp from undesirable quality changes during frozen storage.
Effects of initial frozen shrimp temperature on glaze uptake; glazing time on glaze uptake; and
different glaze percentage on physical and chemical changes of frozen shrimp during storage were
investigated. Shrimps were frozen in a spiral freezing machine (35 C/15 min); transferred to the air
blast freezer until the core temperature reached 18 C, 25 C and 30 C; submitted to glazing process;
and stored at 18 C for 180 days. The glazing percentage, pH and N-TVB levels were monitored
every 45 days. This study has demonstrated the effectiveness of the glazing process as a protecting agent
for frozen shrimp. A reasonable range of water uptake could be between 15% and 20% to guarantee the
final quality. Therefore, it is important to prevent temperature fluctuations during transportation and
storage to maintain the quality of the frozen shrimps.
2008 El