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dc.contributor.authorPaulo, Bruna Barbon-
dc.contributor.authorOliveira Júnior, Fernando Divino de-
dc.contributor.authorAlvim, Izabela Dutra-
dc.contributor.authorPrata, Ana Silvia-
dc.contributor.otherPT_Br
dc.date.accessioned-
dc.date.accessioned2021-07-07T19:10:07Z-
dc.date.availablePT_Br
dc.date.available2021-07-07T19:10:07Z-
dc.date.copyright-
dc.date.issued2020-
dc.identifierPT_Br
dc.identifier.citationPAULO, B. B.; et. al. Warburg’s method as a simple tool for measuring oxygen uptake in spray-dried emulsions. Food Structure, v. 25 , 100143, 2020.pt_BR
dc.identifier.urihttp://repositorio.ital.sp.gov.br/jspui/handle/123456789/135-
dc.description.abstractLipid oxidation is usually responsible for oil downgrading of spray-dried powders and it is strongly dependent on the storage conditions. Direct measurements of the oxygen uptake using cost-effective methods combined with the study of water adsorption of the powders allow evaluating their barrier properties against oxidation. Therefore, a low-cost and simple apparatus based on the Warburg’s manometric technique was built, and its results were compared to Rancimat and Oxipres methods. Firstly, free unsaturated oil (fish oil) was evaluated and data showed a strong positive correlation between the oxygen uptakes for the new apparatus (0.015 mL O2/ h) and Oxipres method (Pearson’s coefficient = 0.97). After, different surface-active compounds (SAC) (whey protein isolate – WPI, gelatin – GE, or modified starch – MS) mixed to maltodextrin (MD) were used to encapsulate the fish oil via spray drying. The lowest oxygen uptake was obtained by MD+ WPI (0.0018 mL O2/h), followed by MD + GE (0.0103 mL O2/h) and MD + MS (0.0291 mL O2/h), with similar behavior obtained by Rancimat method. The lowest protective barrier of MD + MS-powders was confirmed by the comparatively higher susceptibility to water adsorption, and consequently the lower glass transition temperature (∼58.7 °C at water activity = 0.3−0.4). This study presented a successful creation of an apparatus to provide useful, fast and effective information about oxygen consumption by fish oil and encapsulated fish oil, allowing the understanding of the protection of SAC against oxidation in spray-dried emulsions. The proposed apparatus can be easily implemented in laboratories, with potential application for other oxygen-sensitive products.pt_BR
dc.description.sponsorshipFAPESPpt_BR
dc.formatPT_Br
dc.languagePT_Br
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dc.rightsPT_Br
dc.sourcePT_Br
dc.subjectOxidative stabilitypt_BR
dc.subjectMicroencapsulationpt_BR
dc.subjectSpray dryingpt_BR
dc.subjectWarburg’s methodpt_BR
dc.titleWarburg’s method as a simple tool for measuring oxygen uptake in spraydried emulsionspt_BR
dc.typeArticlept_BR
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