Recently, the interest in Aloe vera has been increased accordingly with its content in polymannas, which show many healthy effects. The vacuum impregnation (VI) was used to enrich apple slices with Aloe vera gel. The effects of vacuum level, vacuum and relaxation times on the main chemical and physical attributes were described. Results showed as, applying the best operating conditions, VI allowed to introduce Aloe vera gel into the pores of apple tissue reaching a content of polymannan between 1 and 8 mg/100 g of fresh apples.
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Derossi et al. (2017) studied this question.
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