dc.contributor.author |
Ferrentino, G |
en |
dc.contributor.author |
Balaban, Murat |
en |
dc.contributor.author |
Ferrari, G |
en |
dc.contributor.author |
Poletto, M |
en |
dc.date.accessioned |
2012-02-27T01:39:47Z |
en |
dc.date.issued |
2010-02 |
en |
dc.identifier.citation |
The Journal of Supercritical Fluids 52(1):151-160 Feb 2010 |
en |
dc.identifier.issn |
0896-8446 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/12081 |
en |
dc.description.abstract |
Experimental survival curves of Saccharomyces cerevisiae cells exposed to high pressure carbon dioxide (HPCD) treatments under several constant temperatures (35, 40 and 50 °C), pressures (7.5, 10.0 and 13.0 MPa) and suspended in distilled water with different sodium phosphate monobasic buffer concentrations (0.02, 0.10, 0.20 and 0.40 M) were obtained. The Peleg model was applied to the isobaric and isothermal conditions described by the power law equation log[S(t)] = −btn, where S(t) is the momentary survival ratio and ‘b’ and ‘n’ are the rate and the shape parameters, respectively. The values of the coefficients ‘b’ and ‘n’ were calculated for each experiment at fixed pressure and temperature. For each suspending medium the power law model was proposed to describe the combined effects of pressure and temperature. Taking into account the CO2 solubility as a function of the sodium phosphate monobasic concentration, ‘b’ and ‘n’ were correlated to the CO2 solubility values and temperature. An equation was proposed for ‘b’ as a function of CO2 solubility and temperature while ‘n’ was a weak function of temperature. The resulting equation was much simpler that the one obtained correlating the microbial inactivation to pressure and temperature and, more important, it was independent of the suspending medium. The results indicate that the coupling of carbon dioxide solubility, also predicted with commercial software, and the use of inactivation models referred to solubility and temperature may provide a powerful instrument for the interpretation of microbial inactivation experiments and for the design of HPCD processes and equipments. |
en |
dc.language |
EN |
en |
dc.publisher |
ELSEVIER SCIENCE BV |
en |
dc.relation.ispartofseries |
Journal of Supercritical Fluids |
en |
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher.
Details obtained from http://www.sherpa.ac.uk/romeo/issn/0896-8446/ |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.subject |
S. cerevisiae cells |
en |
dc.subject |
Inactivation kinetics |
en |
dc.subject |
Peleg model |
en |
dc.subject |
High pressure carbon dioxide treatment |
en |
dc.subject |
Carbon dioxide solubility |
en |
dc.subject |
APPLE JUICE |
en |
dc.subject |
MICROBIAL INACTIVATION |
en |
dc.subject |
MODEL |
en |
dc.title |
Food treatment with high pressure carbon dioxide: Saccharomyces cerevisiae inactivation kinetics expressed as a function of CO2 solubility |
en |
dc.type |
Journal Article |
en |
dc.identifier.doi |
10.1016/j.supflu.2009.07.005 |
en |
pubs.issue |
1 |
en |
pubs.begin-page |
151 |
en |
pubs.volume |
52 |
en |
dc.rights.holder |
Copyright: ELSEVIER SCIENCE BV |
en |
pubs.end-page |
160 |
en |
dc.rights.accessrights |
http://purl.org/eprint/accessRights/RestrictedAccess |
en |
pubs.subtype |
Article |
en |
pubs.elements-id |
230103 |
en |
pubs.record-created-at-source-date |
2012-02-17 |
en |