engleski

Influence of Respiration on Predictive Microbial Growth of Aerobic Mesophilic Bacteria and Enterobacteriaceae in Fresh-Cut Apples Packaged Under Modified Atmosphere

Objectives in this study were to model/predict simultaneous influences of apple O2-consumption/CO2-production rates math formula and modified atmosphere packaging (MAP) (from volumetric concentrations of O2/CO2 math formulaon microbial growth (Aerobic mesophilic bacteria, AMB ; Enterobacteriaceae, EBac) in 2 fresh-cut apple cultivars treated with five anti-browning treatments and stored in refrigerator. Growth of both microorganisms was best predicted by length of shelf-life, math formulaWith AMB/EBac growth, cultivar's math formula decreased together with math formula in packaging. Similarly, with microbial growth math formula dropped, while simultaneously math formulaincrease was observed in package. Regression coefficients ratios for AMB-respiration models were similar to ratios for stoichiometric coefficients for respiration equation with malic acid as main substrate. Hence, presented models likely captured natural relations between predictors, and gave good estimate of AMB growth and its association with respiration in MAP. Apple browning had weak or no association with bacterial growth. Obtained models may be utilized to optimize industrial parameters with least AMB/EBac growth, hence facilitate extension of fresh-cut apple shelf-life.

fresh-cut apple ; anti-browning ; shelf-life ; modified atmosphere ; mathematical modeling ; Aerobic mesophilic/Enterobacteriacea

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