Effect of Droplet Size on Autoxidation Rates of Methyl Linoleate and ^|^alpha;-Linolenate in an Oil-in-Water Emulsion

Ma, Tiezheng; Kobayashi, Takashi; Adachi, Shuji

doi:10.5650/jos.62.1003

Cited by 9 publications

(11 citation statements)

References 16 publications

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“…We also showed that there is a smaller rate constant for autoxidation of methyl linoleate for smaller oil droplets and proposed a model for explaining the dependence of the rate constant on oil droplet size [10]. Other studies previously reported no significant effect of oil droplet size on the lipid oxidation rate [11][12][13][14][15]. The difference in the dependence of autoxidation rate of lipid on the oil droplet size could be ascribed to certain factors, such as the kind of lipid used, the oil droplet size range, and the temperature tested, although the reason for the difference has not been specified.…”

Section: Introductionsupporting

confidence: 62%

Effect of Reducing Oil Droplet Size on Lipid Oxidation in an Oil-in-water Emulsion

et al. 2014

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Lipid oxidation processes were simulated for O/W emulsions with different oil-droplet sizes based on autocatalytic type rate expression in order to examine the effect of oil-droplet size on oxidation. Unoxidized lipid molecules were conver ted to oxidized ones momentarily or gradually, and the conversion occurred evenly or randomly in the droplets. When the oxidized molecules were formed momentarily, the droplet size scarcely affected the oxidation process, except for when the number of oxidized molecules was equal to or smaller than the number of oil droplets. In contrast, the oil droplet size significantly affected the oxidation process when the oxidized molecules were gradually and randomly formed at regular intervals. The oxidation was more retarded for the emulsions with smaller oil droplets. Because the latter case would be closer to a real system, the reduction in the oil droplet size in O/W emulsions is expected to increase the stability of lipids to protect against oxidation.

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Section: Introductionsupporting

confidence: 62%

Effect of Reducing Oil Droplet Size on Lipid Oxidation in an Oil-in-water Emulsion

et al. 2014

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“…The susceptibility of the smaller droplets has been reported previously. ,,, For example, Lethuaut et al reported that the emulsion with the smaller droplets showed faster oxygen consumption rate than that of the larger droplets. They suggested that the possible underlying reason could be attributed to the increase of surface area of the smaller droplets which could increase the opportunity for the lipid substrate to contact oxygen.…”

Section: Results and Discussionmentioning

confidence: 54%

Application of Flow Cytometry As Novel Technology in Studying the Effect of Droplet Size on Lipid Oxidation in Oil-in-Water Emulsions

McClements

Decker

2019

J. Agric. Food Chem.

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Despite several published studies, the impact of emulsion droplet size on lipid oxidation rates is unclear. This could be because oil-in-water emulsions are typically polydisperse and the oxidation rate of individual droplets is difficult to discern. Flow cytometry is a technique for studying individual cells and their subpopulations using fluorescence technologies, which is possible to be used in studying individual emulsion droplets. Typical emulsion droplets are too small to be visualized by flow cytometer so emulsions were prepared to have droplets >2 μm that were stabilized by weighting agent and xanthan gum to minimize creaming during storage. A radical-sensitive fluorescence probe (BODIPY665/676) was added to the lipid used to prepare the emulsion so that the susceptibility of individual emulsion droplets could be determined. The results showed that in a polydisperse emulsion system, small droplets were oxidized faster than large droplets. A conventional method was also carried out by blending two emulsions with different droplet sizes and oil densities, and results were in agreement with the observation obtained from flow cytometry. As a new approach, flow cytometry could be utilized in emulsion studies to reveal insights of lipid oxidation mechanisms in individual droplets.

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“…Under the following four assumptions, the increasing rate of oxygen concentration in an oil droplet can be expressed by Eq. 5 : a oxygen is transferred from the aqueous phase into the oil droplet through an oil-water interface with a mass transfer coefficient of k f ; b oxygen diffuses quickly in the oil droplet, and the oxygen concentration in oil droplets with a radius of r p is homogeneous; c the oil-droplet diameter does not change during the oxidation 13,21 ; and d the stoichiometric coefficient between lipid and oxygen is unity 23 .…”

Section: Modelmentioning

confidence: 99%

Effect of Oil-Droplet Diameter on Lipid Oxidation in O/W Emulsions

et al. 2021

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Effect of Droplet Size on Autoxidation Rates of Methyl Linoleate and ^|^alpha;-Linolenate in an Oil-in-Water Emulsion

Cited by 9 publications

References 16 publications

Effect of Reducing Oil Droplet Size on Lipid Oxidation in an Oil-in-water Emulsion

Effect of Reducing Oil Droplet Size on Lipid Oxidation in an Oil-in-water Emulsion

Application of Flow Cytometry As Novel Technology in Studying the Effect of Droplet Size on Lipid Oxidation in Oil-in-Water Emulsions

Effect of Oil-Droplet Diameter on Lipid Oxidation in O/W Emulsions

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