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Model for Gas Exchange Dynamics in Modified‐Atmosphere Packages of Fruits and Vegetables
Author(s) -
FISHMAN SVETLANA,
RODOV V.,
PERETZ J.,
BENYEHOSHUA S.
Publication year - 1995
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1995.tb06296.x
Subject(s) - modified atmosphere , respiration , overshoot (microwave communication) , respiratory quotient , chemistry , atmosphere (unit) , respiration rate , mathematics , biological system , environmental science , thermodynamics , food science , botany , computer science , physics , biochemistry , biology , telecommunications , shelf life
A model for atmosphere in a package containing fresh fruits was analyzed theoretically and validated by experiments with red bell pepper fruit. The model was based on two processes: fruit respiration and film permeability. Mathematical analysis showed that when rates of O 2 consumption and CO 2 evolution due to respiration are equal, and film permeability to CO 2 is greater than that to O 2 , the time course curve of CO 2 concentration has a maximum. In a closed system, the time course of the sum of the gases could indicate a change of respiratory quotient. These results are independent of model for respiration. To predict extent of overshoot and for a computerized simulation, the equation of Michaelis‐Menten type with noncompetitive inhibition was adopted to describe respiration. Utilizing computer simulations enabled evaluation of film specifications and package dimensions best for a given commodity.