ross: Secondary growth curves

In nlsMicrobio: Nonlinear Regression in Predictive Microbiology

Secondary growth curves

Description

A data frames describing the specific growth rate of Escherichia coli as a function of various environmental factors

Usage

  data(ross)

Format

A data frame with five columns (author: the author of the paper from which the data was extracted, T: the temperature in Celsius, aw: the water activity, pH: the pH value, sqrtmumax: the square root of the maximum specific growth rate)

Source

Ross T, Ratkowsky DA, Mellefont LA, McMeekin TA (2003) Modelling the effects of temperature, water activity, pH and lactic acid concentration on the growth rate of Escherichia coli. International of Food Microbiology, 82, 33-43.

Examples

data(ross)
def.par <- par(no.readonly = TRUE)
par(mfrow = c(2, 2))
plot(ross[c("T", "sqrtmumax")])
plot(ross[c("pH", "sqrtmumax")])
plot(ross[c("aw", "sqrtmumax")])
par(def.par)

nlsMicrobio documentation built on May 29, 2024, 6:38 a.m.