Materials
Two different sizes (100 shrimp/kg and 200 shrimp/kg) of fresh Penaeus spp.
shrimps were provided by Songkhla central market. To deactivate and disinfect the
shrimp of micro-organisms, raw samples were washed and boiled using salt water with
concentration of 3 % (weight per volume) for 3 min [18]. The initial moisture content of
the sample was between 270 and 350 % dry-basis and after drying the desired final
moisture content was about 20 - 25 % dry-basis