INVESTIGADORES
PINOTTI Adriana Noemi
artículos
Título:
Modelling of Microbial Growth in Potato Homogenate System
Autor/es:
GIANNUZZI; PINOTTI, A; ZARITZKY, N
Revista:
Journal of Science of the Food and Agriculture
Editorial:
Wiley InterScience
Referencias:
Año: 1997 vol. 73 p. 425 - 431
Resumen:
Abstract : The use of linear and non-linear models (Gompertz and logistic
equations) to Ðt changes in microbial counts in a model system of potato homogenate
at various concentrations of chemical preservatives (citric and ascorbic
acids) was evaluated. The eect of undissociated acid concentrations (UAC) on k
equations) to Ðt changes in microbial counts in a model system of potato homogenate
at various concentrations of chemical preservatives (citric and ascorbic
acids) was evaluated. The eect of undissociated acid concentrations (UAC) on k
The use of linear and non-linear models (Gompertz and logistic
equations) to Ðt changes in microbial counts in a model system of potato homogenate
at various concentrations of chemical preservatives (citric and ascorbic
acids) was evaluated. The eect of undissociated acid concentrations (UAC) on kk
(speciÐc growth rate), lag phase duration and inactivation rate of Enterobacteriaceae,
L actobacillus sp, Pseudomonas sp and psychrotrophic microorganisms
was determined. Citric acid had a strong inhibitory action on growth rate at low
concentrations (0.065 mM UAC, pH5). Pseudomonas sp were the microorganisms
most inhibited by citric acid. Ascorbic acid, at low UAC concentrations
(0.302 mM UAC) was more inhibitory to Enterobacteriaceae than to the
other microorganisms. For UAC concentration lower than 3 mM, k values of all
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
other microorganisms. For UAC concentration lower than 3 mM, k values of all
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
most inhibited by citric acid. Ascorbic acid, at low UAC concentrations
(0.302 mM UAC) was more inhibitory to Enterobacteriaceae than to the
other microorganisms. For UAC concentration lower than 3 mM, k values of all
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
other microorganisms. For UAC concentration lower than 3 mM, k values of all
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
was determined. Citric acid had a strong inhibitory action on growth rate at low
concentrations (0.065 mM UAC, pH5). Pseudomonas sp were the microorganisms
most inhibited by citric acid. Ascorbic acid, at low UAC concentrations
(0.302 mM UAC) was more inhibitory to Enterobacteriaceae than to the
other microorganisms. For UAC concentration lower than 3 mM, k values of all
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
other microorganisms. For UAC concentration lower than 3 mM, k values of all
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
most inhibited by citric acid. Ascorbic acid, at low UAC concentrations
(0.302 mM UAC) was more inhibitory to Enterobacteriaceae than to the
other microorganisms. For UAC concentration lower than 3 mM, k values of all
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
other microorganisms. For UAC concentration lower than 3 mM, k values of all
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
sp, Pseudomonas sp and psychrotrophic microorganisms
was determined. Citric acid had a strong inhibitory action on growth rate at low
concentrations (0.065 mM UAC, pH5). Pseudomonas sp were the microorganisms
most inhibited by citric acid. Ascorbic acid, at low UAC concentrations
(0.302 mM UAC) was more inhibitory to Enterobacteriaceae than to the
other microorganisms. For UAC concentration lower than 3 mM, k values of all
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
other microorganisms. For UAC concentration lower than 3 mM, k values of all
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
most inhibited by citric acid. Ascorbic acid, at low UAC concentrations
(0.302 mM UAC) was more inhibitory to Enterobacteriaceae than to the
other microorganisms. For UAC concentration lower than 3 mM, k values of all
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
other microorganisms. For UAC concentration lower than 3 mM, k values of all
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
M UAC, pH5). Pseudomonas sp were the microorganisms
most inhibited by citric acid. Ascorbic acid, at low UAC concentrations
(0.302 mM UAC) was more inhibitory to Enterobacteriaceae than to the
other microorganisms. For UAC concentration lower than 3 mM, k values of all
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
other microorganisms. For UAC concentration lower than 3 mM, k values of all
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
M UAC) was more inhibitory to Enterobacteriaceae than to the
other microorganisms. For UAC concentration lower than 3 mM, k values of all
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.
M, k values of all
the microorganisms tested were higher with ascorbic acid than with citric acid ;
however at higher concentrations ([10 mM) both acids had similar eects on k.[10 mM) both acids had similar eects on k.