Impact of process conditions and coatings on the dehydration efficiency and cellular structure of apple tissue during osmotic dehydration

摘要: Abstract The combined treatment of coating and osmotic dehydration to apples was carried out by using dextrose sucrose as agents. Prior dehydration, apple cubes were coated two hydrophilic materials, sodium alginate low methoxyl pectinate (LMP). effect process variables, including the concentration temperature medium, on performance ratio efficiency index studied. Higher found in at high 55 °C. Better obtained when agent compared dextrose. samples higher temperatures than temperature. Among agents, sucrose, with larger molecular size, could provide SEM results revealed that cellular structure better maintained non-coated samples, osmotically dehydrated solution This may be due fact materials well prevent solute uptake maintain cell wall apples. In addition, showed collapse structure.