Use of optical density detection times to assess the effect of acetic acid on single-cell kinetics

Article Abstract:

A new method was applied to study the effect of acetic acid on the distribution of single-cell lag times, to estimate the kinetics parameters of single cells from the distribution of detection times assuming that the single-cell lag time follow a gamma distribution with a fixed shape parameter. It was found that the logarithm of scale parameter of the gamma distribution increased linearly with the acetic acid concentration.

United Kingdom, Acetic Acid, Chemical reaction, Rate of, Chemical kinetics, Chemical properties

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Indirect measurement of the lag time distribution of single cells of Listeria innocua in food

Article Abstract:

The distribution of log counts at a given time during the exponential growth phase of Listeria innocua measured in food samples inoculated with one cell each was applied to estimate the distribution of the single-cell lag time. Three replicate experiments in broth showed that the distribution of the log counts is a linear mapping of the distribution of the detection times measured by optical density.

Goods & services distribution, Channels of Distribution, Food, Distribution, Food microbiology, Company distribution practices

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Individual and combined effects of pH and lactic acid concentration on Listeria innocua inactivation: Development of a predictive model and assessment of experimental variability

Article Abstract:

The investigation related to the inactivation process in Listeria innocua under controlled, initial conditions of pH (p[H.sub.0]) and undissociated lactic acid ([[LaH].sub.0]) is presented.

Food Preservatives

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