Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/2655
Título: Modelling respiration of packaged fresh-cut "Rocha" pear as affected by oxygen
Autor: Gomes, M. Helena
Beaudry, Randolph M.
Almeida, Domingos P.F.
Malcata, F. Xavier
Palavras-chave: Film permeability
Minimal processing
Modified atmosphere packaging
Pyrus communis
Respiratory quotient
Data: 2010
Editora: Elsevier
Citação: "Journal of Food Engineering." ISSN 0260-8774. 96: 1 (2010) 74–79
Resumo: Respiration rates were measured in fresh-cut ‘Rocha’ pear (Pyrus communis L.) stored at four temperatures (0, 5, 10 and 15 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 Km;O2 ) was similar to or only slightly greater than the fermentation threshold. The narrow range of oxygen between Km;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.
URI: http://hdl.handle.net/10400.14/2655
Versão do Editor: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T8J-4WNB4XC-2&_user=2460358&_coverDate=01%2F31%2F2010&_alid=1483863961&_rdoc=1&_fmt=high&_orig=search&_origin=search&_zone=rslt_list_item&_cdi=5088&_sort=r&_st=13&_docanchor=&view=c&_ct=1&_acct=C000057417&_version=1&_urlVersion=0&_userid=2460358&md5=359463cbd303e9142f478c67e73769ee&searchtype=a
Aparece nas colecções:ESB - Artigos em revistas internacionais com Arbitragem / Papers in international journals with Peer-review

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