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- W2076391235 abstract "A cellular alginate solid containing oil was prepared by freeze-drying. The oil was incorporated in the matrix by emulsification in the pre-gel state. The alginate−oil gels were immersed in 60 °Brix sucrose solution for various periods, before freeze-drying. The extent of the collapse expressing the reduction in sample volume was affected by immersion duration and freeze-drying conditions. Sucrose diffusion during immersion followed an exponential pattern. Effective diffusivity calculated using nonlinear regression gave a value of 3.64 × 10-10 m2/s. The effect of relative humidity on water content calculated on a dry basis excluding sucrose showed a significant increase in water content at 75% RH. Image analysis was utilized to quantify the area of the encapsulated oil droplets. The area of the droplets was divided into four subregions defined as (0.02−0.1) × 10-12, (0.1−1.0) × 10-12, (1−10) × 10-12, and (10−100) × 10-12 m2. A distribution resembling a Gaussian bell distribution with a maximum of 54% for the (1−10) × 10-12 m2 area range was found. The number of oil droplets was almost constant for the first three area regions, and then decreased markedly. Oxidation index was not effected by porosity at 0 and 22% RH. A 75% RH and porosity above a critical value of ca. 0.45 was found to increase oxidation significantly. Samples immersed for less than 5.5 h in sucrose solution were mechanically stronger after equilibration at 0 and 22% RH when compared to their counterpart equilibrated at 75% RH. Immersion for more than 24 h resulted in similar mechanical strength irrespective of the RH. Keywords: Porosity; diffusivity; permeability; oxidation; encapsulated oil; deformability" @default.
- W2076391235 created "2016-06-24" @default.
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- W2076391235 date "2000-04-19" @default.
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- W2076391235 title "Oxidation of Encapsulated Oil in Tailor-Made Cellular Solid" @default.
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- W2076391235 doi "https://doi.org/10.1021/jf990225x" @default.
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