Osmotically Dehydrated Formosa Papaya with Isomaltulose: Influence of Vacuum and Alginate Coating Use on Mass Transfer and Physicochemical Quality
摘要
In osmotic dehydration (OD), the goal is to use healthier agents and reduce solute incorporation. Based on this, isomaltulose was used as the osmotic agent, and sodium alginate was used as the coating in this study. Coated and uncoated Formosa papaya cubes were subjected to OD with isomaltulose (25% and 35% w/w) and with and without vacuum application (80 kPa for the first 20 min). The OD kinetics were evaluated up to 300 min at 25 °C. The coating application reduced solid gain by up to 26% while maintaining water loss, and the condition with the least solute incorporation included the simultaneous use of coating and vacuum. Additionally, the coated samples showed lower water activity and higher preservation of phenolic compounds. Solutions with higher concentrations of isomaltulose resulted in a greater solid gain, water loss, weight reduction, and shrinkage, and up to a 17% reduction in moisture content. Vacuum application preserved antioxidant capacity and resulted in less browning and morphological deformation of the samples.