The effects of particle size regarding oil migration and fat bloom
development on chocolate model pralines have been evaluated.
Combined results from LV SEM, profilometry, EDS and DSC indicate
that model pralines, stored at 23 C, with a non-fat particle size of
15 lm undergo a higher rate of oil migration from filling to shell
and thus a higher rate of developing fat bloom, compared to model
pralines with a non-fat particle size of 22 or 40 lm. Thus, the specific
surface area of the non-fat particles seems to be an important
parameter for oil migration and fat bloom development in chocolate
pralines. From the migration experiments with the brominated
probe it is clear that the results cannot only be explained using diffusive
migration. Hence we concluded that convective migration
most likely contributes to the migration process.
The effects of particle size regarding oil migration and fat bloomdevelopment on chocolate model pralines have been evaluated.Combined results from LV SEM, profilometry, EDS and DSC indicatethat model pralines, stored at 23 C, with a non-fat particle size of15 lm undergo a higher rate of oil migration from filling to shelland thus a higher rate of developing fat bloom, compared to modelpralines with a non-fat particle size of 22 or 40 lm. Thus, the specificsurface area of the non-fat particles seems to be an importantparameter for oil migration and fat bloom development in chocolatepralines. From the migration experiments with the brominatedprobe it is clear that the results cannot only be explained using diffusivemigration. Hence we concluded that convective migrationmost likely contributes to the migration process.
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