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Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization
Published on: May 19, 2019
Hydrothermal processing modulates thermal, rheological and starch digestive properties of cassava cells by altering
Meng Jia1, Rongrong Ma1, Chang Liu1
1State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China.
Abstract:
Cassava cells were subjected to different hydrothermal processing conditions to investigate the mechanisms by which processing variables affect cellular structure, rheological behavior, and starch digestibility of cassava cells. Enhanced hydrothermal conditions disrupted starch crystal structure and increased cell wall permeability. This resulted in a reduction in the rigid structure (G') and an increase in the viscosity (G″) of cassava cell pastes. At low gelatinization degrees of intracellular starch (RC > 14 %), gel viscosity of cells originated primarily from the hydrophilicity of cell wall polysaccharides, whereas swollen gelatinized starch granules dominated viscosity development at higher gelatinization degrees. The presence of cell morphology after hydrothermal processing led to the separation of weakly adhered cell clusters under shear force, rather than individual cell rupture. Thermal properties of cassava cells correlated with the degree of cell wall damage and the residual crystalline structure of intracellular starch. Autoclaving induced starch molecular degradation and the loss of cell wall composition, enhancing solubility while reducing viscosity of cassava cell pastes. Both cell wall permeability and starch structure regulated the digestibility of intracellular starch in cassava cells. This study provides fundamental insights for optimizing hydrothermal processing parameters to engineer cassava cell flour foods with tailored functional properties.
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