Changes in proteolysis of preserved raw milk through pseudostem juices of banana tree

Abstract

The present study we are using a potential preservatives pseudostem juices of banana tree (PJBT) at three different concentrations (0.1%, 0.2% and 0.3%) for preservation of raw milk at ambient temperature (AT) at 30±10C and refrigerated temperature (RT) at 7±10C for extending the shelf life of milk. Tyrosine value (TV) as an index of proteolysis was determined for control and three different levels of pseudostem juices of banana tree 0.1%, 0.2% and 0.3% concentration preservatives for cow and buffalo milk for up to 6 hrs. preservations at ambient temperature (AT) at 30±10C. The mean value for Tyrosine value (TV) of fresh cow and buffalo milk were found to be 0.138 mg/ml and 0.152 mg/ml respectively at ambient temperature (AT) at 30±10C and refrigerated temperature (RT) at 7±10C. The change in Tyrosine Value was slower in higher of 0.3% concentration of pseudostem juices of banana tree-treated cow and buffalo milk sample during 6 hrs. storage of 0.147±0.05 mg/ml and 0.161±0.02 mg/ml respectively at ambient temperature (AT) at 30±10C. Similarly, after 6 days of storage TV of preserved cow and buffalo milk samples were 0.138±0.02 mg/ml and 0.152±0.04 mg/ml to 0.144±0.02 mg/ml and 0.163±0.03 mg/ml respectively at 0.3% concentrations of pseudostem juices of banana tree (PJBT) on refrigerated temperature (RT) at 7±10C.