Osmotic dehydration as a pre-treatment for jackfruit berries (Artocarpus heterophyllus): effect on physico-chemical properties, shelf life and sensory acceptability

Abstract

PurposeThe aim of the study was to evaluate the effect of osmo-convective dehydration using two drying temperatures (50 and 60°C) on the physico-chemical properties, shelf life and sensory acceptability of jackfruit berries.Design/methodology/approachFour treatments were used as follows: T1 – Jackfruit berries dried in an oven at 50°C; T2 – Jackfruit berries dried in an oven at 60°C; T3 – Jackfruit berries pre-treated with an osmotic-sucrose solution (60 Brix concentration) and oven-dried at 50°C and T4 – Jackfruit berries pretreated with osmotic solution (60 Brix concentration) and oven-dried at 60°C. Berries' shelf life was monitored by moisture analysis, water activity (Wa) and microbiological analysis. The influence of treatments on physico-chemical properties and sensory quality was also investigated.FindingsOsmo-convective dehydration at 50 and 60 C significantly (p = 0.001) reduced moisture content and Wa. All treatments increased the shelf life of jackfruit berries within 30 days of storage. Regarding sensory analysis, the T3 treatment was significantly (p = 0.001) the most preferred by the tasters.Originality/valueIn general, the results indicated that osmo-convective dehydration at 50 C has great potential to be a maid in the processing of minimally processed jackfruit berries, as, in addition to providing the product with high stability, it was the one with the greatest acceptability by the tasters.