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  • Title: Increase of resistant starch content by hydrolysis of potato amylopectin and its microstructural studies by 2D and 3D imaging.
    Author: Das M, Banerjee R.
    Journal: Int J Biol Macromol; 2022 Dec 31; 223(Pt B):1674-1683. PubMed ID: 36302485.
    Abstract:
    The effect of amylopullulanase treatment on recrystallization behaviour and the formation of resistant starch crystals have been investigated. Extracted potato starch (Solanum tuberosum) has been subjected to the enzymatic assisted bioprocessing without any physical or chemical treatment, where 120 min of incubation, 7 % (v/v) of enzyme and 8 mL/g of water content were found to be optimum to increase the resistant starch content by 41.88 %. The resistant starch crystals showed the characteristic behaviour of B-type allomorph with an increase in 21.32 % crystallinity. The modified crystals portrayed less reduction in actual weight when assessed by thermo-gravimetric analysis. The compact linear arrangement of the linear amylose chains within the crystallized granule of starch has been evidenced by Bright Field Microscopy. The microstructure of the resistant starch crystals showed 33.18 % reduction in porosity when the 3-dimensional structural form was analysed by X-ray micro-Computed Tomography.
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