Multiscale structure, physicochemical properties, and in vitro digestibility of corn starch complexes co-gelatinized
Haizhi Li1, Shenglin Duan2, Jia Liu2
1College of Biological Science and Technology, Beijing Key Laboratory of Forest Food Processing and Safety, Beijing Forestry University, Beijing, 100083, China.
Abstract:
Partially hydrolyzed guar gum (PHGG), an enzymatic hydrolysate of guar gum (GG), confers various physiological benefits, including hypoglycemic effects and gut microbiota regulation. The molecular weight of PHGG is identified as a key determinant of the pasting properties of corn starch (CS). This study evaluated the effects of GG and PHGG with different molecular weights (34.66 kDa, 25.17 kDa, 14.71 kDa, and 8.93 kDa) on the physicochemical and digestion properties of CS. The results showed that GG increased the peak viscosity (PV), trough viscosity (TV), final viscosity (FV), apparent viscosity, dynamic moduli (G' and G″), and mean volume (MV) of CS gel, but reduced its thermal stability. In contrast, PHGG demonstrated distinct effects by effectively inhibiting starch swelling and enhancing the thermal stability of the gel system. High-molecular-weight PHGG formed a gel characterized by larger, irregularly distributed honeycomb-like pores, which significantly reduced gel hardness (P < 0.05). Furthermore, with the reduction in PHGG molecular weight, the slowly digestible starch (SDS) content in the CS-PHGG gel decreased significantly, while the resistant starch (RS) content increased (P < 0.05). Multiple factor analysis (MFA) revealed strong correlations between the physicochemical properties and structural characteristics of the gels. These findings demonstrate that PHGG modulates starch gel properties, which may provide new insights for the design of starch-based foods with tailored nutritional or functional properties.
Related Concept Videos
08:52Method to Produce Durable Pellets at Lower Energy Consumption Using High Moisture Corn Stover and a Corn Starch Binder in a Flat Die Pellet Mill
08:46Analysis and Specification of Starch Granule Size Distributions
01:21Factors Affecting Drug Biotransformation: Physicochemical and Chemical Properties of Drugs
The drug's acidity or basicity is essential in...
01:31Factors Affecting Renal Clearance: Drug's Physicochemical Properties and Plasma Levels
One important factor is the drug's molecular size. The kidneys readily excrete smaller molecules below 300 Daltons (Da). On the other hand, molecules weighing between 300 and 500 Da are excreted through both urine and bile. Larger molecules above 500 Da tend to be excreted...
06:14Multiscale Structures Aggregated by Imprinted Nanofibers for Functional Surfaces
12:05Production of Disulfide-stabilized Transmembrane Peptide Complexes for Structural Studies