Enzyme kinetics modelling approach to evaluate the impact of high CO2 and super-atmospheric O2 concentrations on respiration rate of pomegranate arils

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dc.contributor.authorBelay, Zinash A.en_ZA
dc.contributor.authorCaleb, Oluwafemi Jamesen_ZA
dc.contributor.authorOpara, Umezuruike Linusen_ZA
dc.date.accessioned2018-07-18T06:28:53Z
dc.date.available2018-07-18T06:28:53Z
dc.date.issued2017
dc.descriptionCITATION: Belay, Z. A., Caleb, O. J. & Opara, U. L. 2017. Enzyme kinetics modelling approach to evaluate the impact of high CO2 and super-atmospheric O2 concentrations on respiration rate of pomegranate arils. CyTA - Journal of Food, 15(4):608-616, doi:10.1080/19476337.2017.1324524.
dc.descriptionThe original publication is available at https://www.tandfonline.com
dc.descriptionPublication of this article was funded by the Stellenbosch University Open Access Fund.
dc.description.abstractSuper-atmospheric O2 has been shown to affect respiration rate (RR), but no model describing its effect on RR for pomegranate arils has been reported. This study investigated the effects of four different gas compositions (5 kPa O2, 10 kPa CO2 and 85 kPa N2; 10 kPa O2, 5 kPa CO2 and 85 kPa N2; 70 kPa O2, 10 kPa CO2 and 20 kPa N2; and air) on RR of pomegranate arils (cv. Wonderful) stored at 5°C. Michaelis–Menten enzyme kinetics models were used to investigate the effect of CO2 inhibition on O2 consumption rate. Respiratory quotient was used to determine fermentation threshold. The O2 consumption rate increased from 0.87 to 2.81 mL/kg h, with increase in O2 concentration from 5 kPa to 70 kPa. All enzyme kinetics model parameters adequately described the influence of gas concentration on aril RR with correlation coefficient (R2adj = 81–91%).en_ZA
dc.description.urihttps://www.tandfonline.com/doi/full/10.1080/19476337.2017.1324524
dc.description.versionPublishers' version
dc.format.extent10 pages
dc.identifier.citationBelay, Z. A., Caleb, O. J. & Opara, U. L. 2017. Enzyme kinetics modelling approach to evaluate the impact of high CO2 and super-atmospheric O2 concentrations on respiration rate of pomegranate arils. CyTA - Journal of Food, 15(4):608-616, doi:10.1080/19476337.2017.1324524
dc.identifier.issn1947-6345 (online)
dc.identifier.issn1947-6337 (print)
dc.identifier.otherdoi:10.1080/19476337.2017.1324524
dc.identifier.urihttp://hdl.handle.net/10019.1/104155
dc.language.isoen_ZAen_ZA
dc.publisherTaylor & Francis
dc.rights.holderAuthors retain copyright
dc.subjectGas burstsen_ZA
dc.subjectDiffusionen_ZA
dc.titleEnzyme kinetics modelling approach to evaluate the impact of high CO2 and super-atmospheric O2 concentrations on respiration rate of pomegranate arilsen_ZA
dc.typeArticleen_ZA
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