So described above, many researches on frozen shrimp
have been conducted (Kent & Stroud, 1999; Pan & Yeh,
1993; Srinivasan, Xiong, Blanchard, & Tidwell, 1998).
However, as the shrimp is in the processing plant, it is frozen
either in bulk by glazing with water and freezing in an
air-blast freezer or individually frozen (IQF) using liquid
CO2 or N2. It might be thawed and refrozen during transportation
and repackaging in a smaller retailer. Shrimp
could be freeze–thawed many times before consumed.
The objective of this research was to investigate the effects
of freezing by air-blast and cryogenic, thawing by refrigerator
and microwave, and freeze–thaw cycle on the physical
and chemical changes of tiger shrimp.