Please use this identifier to cite or link to this item: http://hdl.handle.net/10216/94408
Author(s): M.H. Gomes
R.M. Beaundry
Domingos Almeida
F.X. Malcata
Title: Modelling respiration of packaged fresh-cut 'Rocha' pear as affected by oxygen concentration and temperature
Issue Date: 2010
Abstract: Respiration rates were measured in fresh-cut 'Rocha' pear (Pyrus communis L) stored at four temperatures (0, 5, 10 and 15 degrees C) and with oxygen partial pressures ranging from 0 to 18 kPa. Respiratory quotient and ethanol production were used to determine the fermentation threshold. The oxygen concentration effect on the respiration rate was accurately described using Michaelis-Menten kinetics, without noncompetitive inhibition by CO2, and the effect of temperature on the respiration rate was well modelled by exponential functions. The oxygen level at which respiration was half its maximum (apparent K-m,K-O2) was similar to or only slightly greater than the fermentation threshold. The narrow range of oxygen between K-m,K-O2 and the fermentation threshold, suggests that modified atmosphere packaging technology has a limited applicability toward extension of the shelf-life of fresh-cut 'Rocha' pear.
Subject: Engenharia agrícola, Outras ciências da engenharia e tecnologias
Agricultural engineering, Other engineering and technologies
URI: http://hdl.handle.net/10216/94408
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FCUP - Artigo em Revista Científica Internacional

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