Heterogeneity during autoxidation of linoleic acid encapsulated with a polysaccharide

Oxidation of 6-O-arachidonoyl l-ascorbate microencapsulated with a polysaccharide by spray-drying

“…Fatty acid molecules interact with the wall material within the microcapsule, and a molecule interacting with the material is oxidized more slowly than that not interacting with it (Ishido et al, 2003). The oxidative stability of linoleic acid in the microcapsule prepared from the O/W emulsion with a smaller median diameter of oil droplets was higher because of the higher probability of interaction of the acid with the wall material within the microcapsule .…”

“…Although the equation was applicable for the oxidation of arachidonic acid in the absence and presence of ascorbic acid, and for that of arachidonoyl ascorbate, it was not easy to apply the equation to the oxidation of the microencapsulated arachidonic acid and arachidonoyl ascorbate because of complicated phenomena, such as the diffusion of oxygen and interaction of the fatty acid with the wall material that occurred in the microcapsules (Ishido, Minemoto, Adachi, & Matsuno, 2003). Therefore, the oxidation kinetics was empirically expressed by the Weibull equation, which is flexible and has a potential for describing many deterioration kinetics (Cunha, Oliverira, & Oliverira, 1998):…”

A Statistical Model for Estimating the Effects of Oil Droplet Size and Oil Fraction in Microcapsules on Oxidation of Oil

“…The microencapsulated oil exhibited two unique features in the oxidation process: the rapid progress of oxidation at the early stage of storage, and the leveling off of the oxidation after prolonged storage . These unique steps in the oxidation of microencapsulated oil could be described by a model that considers the distribution of the free energy of activation for the rate constant of the autoxidation kinetics …”

Fatty acid composition in double and multilayered microcapsules of ω-3 as affected by storage conditions and type of emulsions

“…This decreases the propagation of the oxidation reactions, and oxygen diffusion is slower in the dehydrated matrix of the wall material than in bulk oil (Ishido, Minemoto, Adachi, & Matsuno, 2003). The feasibility of the microencapsulation process is determined by the encapsulation efficiency and to the stability of the ω-3 oil microcapsules upon storage, which in turn depends on the type and composition of feed emulsions to be spray dried (Kaushik, Dowling, Barrow, & Adhikari).…”

“…The feasibility of the microencapsulation process is determined by the encapsulation efficiency and to the stability of the ω-3 oil microcapsules upon storage, which in turn depends on the type and composition of feed emulsions to be spray dried (Kaushik, Dowling, Barrow, & Adhikari). Thus, besides the drying and storage conditions, the characteristics of the ω-3 oil, and the wall material as well as their ratio and the type of emulsions are important factors that influence the stability of ω-3 microcapsules (Ishido, Minemoto, Adachi, & Matsuno, 2003).…”