Journal of Food Processing & Technology

Effect of variable pulse light treatment on Yellowfin tuna (Thunnus albacares) steaks

International Conference and Exhibition on Food Processing & Technology

November 22-24, 2012 Hyderabad International Convention Centre, India

Ananthanarayanan T. R, Nithin C.T, Yathavamoorthi R, Toms C. Joseph, Bindu J and Srinivasa Gopal T.K

Posters: J Food Process Technol

Abstract:

Evaluation of the effectiveness of pulsed light on yellow fin tuna steaks packed in different packing materials viz. 12μ polyester / 300 gauge low-density polyethylene laminate, 300 gauge polyethylene and 300 gauge cast polypropylene pouches of size 14 x 18 cm were carried out using a Xenon pulse light preservation machine RC-847. Pulse treatment was done for 12 sec with energy of 23.35, 22.34 and 22.76 J/cm2 in yellow fin tuna steaks packed in 12μ polyester / 300 gauge low-density polyethylene laminate, 300 gauge polyethylene and 300 gauge cast polypropylene respectively. Total plate count got reduced to 45, 54 and 71 % respectively in the above packaging materials when compared with the control samples without pulse treatment. Cast polypropylene was found to give maximum bacterial reduction and was selected for treating tuna steaks. Further time variations were standardized in yellow fin tuna steaks packed in cast polypropylene and it was seen that the energy output was 5.64, 9.32, 11.5, 15.12 and 20.24 J/cm2 for 2, 4, 6, 8 and 10 sec of pulse treatment respectively. The corresponding bacterial reduction was found to be 0.85, 1.6, 1.83, 2.33, 2.51 log cfu/g. Pulse treatment for 6 sec with an energy output of 11.5 J/cm2 was found to be acceptable microbiologically and with regard to sensory attributes.

Biography :

T.R. Ananthanarayanan has completed his M.Sc. in Food Science and Technology from University of Calicut. Presently working as Senior Research Fellow and pursuing Ph.D. in Pulsed light technology under the guidance of Dr. T.K. Srinivasa Gopal, Director, Central Institute of Fisheries Technology, Cochin 29.