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Predicting Oxygen and Carbon Dioxide Partial Pressures within Modified Atmosphere Packages of Cut Rutabaga
Author(s) -
Zhu M.,
Chu C.L.,
Wang S.L.,
Lencki R.W.
Publication year - 2002
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.1365-2621.2002.tb10664.x
Subject(s) - partial pressure , carbon dioxide , oxygen , chemistry , atmosphere (unit) , analytical chemistry (journal) , nonlinear regression , mathematics , thermodynamics , regression analysis , chromatography , physics , statistics , organic chemistry
A model was developed to predict pO 2 and pCO 2 surrounding cut rutabaga sealed in rigid packages fitted with 2 different polymeric films. The O 2 consumption and CO 2 production rates were calculated using several respiration models fitted using nonlinear least squares or response surface regression analysis. These functions were used in conjunction with variables such as O 2 and CO 2 film permeability, film surface area, package free volume, and cut rutabaga weight to predict pO 2 and pCO 2 changes. A first‐order polynomial model with parameters calculated via response surface analysis gave the best predictions, particularly at partial pressures that were far removed from those used to determine equation constants.