Effect of different temperatures on the free amino acids, physico-chemical and microbial changes during storage of Barramundi (Lates calcarifer) fillets.

• Main Authors: Yassoralipour, Ali, Bakar, Jamilah, Abdul Rahman, Russly, Abu Bakar, Fatimah, Golkhandan, Elham
• Format: Article
• Language: English
• Published: Maxwell Science Publications 2013
• Online Access: http://psasir.upm.edu.my/id/eprint/30489/1/Effect%20of%20different%20temperatures%20on%20the%20free%20amino%20acids.pdf; http://psasir.upm.edu.my/id/eprint/30489/; http://maxwellsci.com/jp/abstract.php?jid=AJFST&no=327&abs=01

The effects of storage days and temperature on free amino acids, TVB-N, pH and microbial changes in Barramundi (Lates calcarifer) fillets kept at 0°C and 8°C were investigated for 20 days. At the end of the storage, significant differences were observed (p<0.05) in the amino acids isoleucine, leucine, methionine, phenylalanine, valine, glutamic acid and glycine from the initial value of both storage temperatures. However, no significant difference (p>0.05) between two temperatures during the storage period were observed. Among two temperatures, the psychrophiles were initially 4.07 log CFU/g and exceeded the acceptable limit of 7 log CFU/g on the 12th and 8th day at 0°C and 8°C, respectively. Although, Total Plate Count (TPC) were initially 3.7 log CFU/g and exceeded the acceptable limit of 6 log CFU/g on the 12th day in the both storage temperatures. Histamine Forming Bacteria (HFB) was significantly (p<0.05) lower in Barramundi fillets storage at 0°C compared to the 8°C. Significant differences (p<0.05) between the concentrations of Total Volatile Base-Nitrogen (TVB-N) in fillets kept at 0°C and 8°C were observed.