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  • Title: Investigating intermittent immersion during osmotic dehydration of mango (Mangifera indica L. Moench). Part A: Determination of optimal conditions for mango (Mangifera indica L. Moench) dehydration impregnation by immersion (D2I) and intermittent immersion (D3I).
    Author: Tsopwo Zena C, Jiokap Nono Y.
    Journal: Heliyon; 2024 Aug 30; 10(16):e35808. PubMed ID: 39247336.
    Abstract:
    This work aimed to determine the optimum conditions for dehydration impregnation by immersion (D2I) and by intermittent immersion (D3I) of mango (Mangifera indica) slices measuring 4 × 1 × 1 cm3. To this end, the Doehlert response surface plan was used, with the following factors for D2I: the volume of D2I solution/fruit mass ratio (6/1-13/1 mL/g), the process time (120-360 min) and the Brix degree of the solution (45-65 °Brix) and with the following factors for D3I: immersion time (20-60 min), process time (60-300 min) and de-immersion time (7-25 min). The temperature was fixed according to literature at 35 °C. The optimum responses obtained for the D2I process were (47.63 ± 1.79) g/100 g (w-b) for water loss, and (6.67 ± 1.04) g/100 g (w-b) for solute gain, for optimum operating conditions of 6/1 mL/g; 245 min and 61.6°Brix respectively for the immersion ratio, process time and solute concentration of the hypertonic solution. The optimum responses obtained for D3I process were (47.98 ± 2.12) g/100 g (w-b) for water loss, and (4.31 ± 0.052) g/100 g (w-b) for solute gain (SG), for operating conditions of 21; 270; and 9 min, respectively for immersion time, process time and de-immersion time. The Student's t-test on the predicted and experimental optima of WL and SG revealed valuable insights for comparing these two processes. The present study will undoubtedly introduce a new dynamic to the osmotic dehydration systems for fruits and vegetables.
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