Premium
Effects of thyme, basil, and garlic oleoresins on the thermal resistance of Bacillus coagulans in tomato sauce
Author(s) -
Rayman Ergün Ahsen,
Baysal Taner
Publication year - 2019
Publication title -
journal of food processing and preservation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.511
H-Index - 48
eISSN - 1745-4549
pISSN - 0145-8892
DOI - 10.1111/jfpp.14118
Subject(s) - oleoresin , bacillus coagulans , food science , chemistry , lycopene , brix , horticulture , biology , carotenoid , fermentation , sugar
In this study, the thermal resistance of Bacillus coagulans in tomato sauce enriched with oleoresin was investigated. Thyme, basil, and garlic oleoresins were used at the minumum inhibitory concentrations of the target microorganism, B. coagulans, which were found as 1.25 ml/100 ml for the basil and garlic, and 2.5 ml/100 ml for the thyme oleroesin in the tomato sauce (pH:4.2, °Brix:10). Different temperatures between 80 and 105°C were studied for determining the thermal resistance of microorganism. The D 90 values were determined as 6.28, 17.03, 13.52, and 14.79 min and the z values were found as 23.7, 22.7, 20.1, and 24.9°C for the thyme, basil, garlic, and control (without oleoresin) groups, respectively. Sauce groups were also evaluated for the quality properties after production and also after 1 month of storage at +4°C. The lycopene (230.1 mg/g) and °Brix (13.36%) values were found mostly in the thyme oleoresin group after storage. There was no significant difference between the color values of the garlic and control group. Practical applications Oleoresins provide an antimicrobial effect and the resistance of the microorganism was reduced, this way the lethal effect was ensured in a short‐time interval. The current study demonstrated that oleoresins provided a 4 log reduction of B. coagulans vegetative cells in tomato sauce during 59.16 min for the control sauce, for thyme 25.12 min, 68.12 min for basil, and 54.08 min for garlic at 90°C. The oleoresin of garlic may be preferred for the enrichment of tomato sauce.