Abstract
Indian white prawns headless and with shell on were vacuum packed in ethylene-vinyl alcohol pouches and subjected to high pressure treatment of 100, 270, 435 and 600 MPa at 25 °C for 5 min. Subsequently the treated samples were stored in ice (2 ± 1 °C) along with control. The samples were periodically analysed to study the changes in total viable count, total Enterobacteriaceae count, K value and overall acceptability. Total viable count, total Enterobacteriaceae count and K value reduced proportionately with increasing high pressure treatment. However, K value and total viable count showed an increasing trend during chill storage whereas total Enterobacteriaceae decreased. No significant difference in K value was observed between control and 100 MPa, while higher pressure treated samples showed a significant difference (P < 0.05). However, among the treatments 270 MPa was found to have better sensory acceptability.
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