This study explored the potential of senna tora gum (STG) to modulate the gelation behavior and microstructure of iota-carrageenan (IC) in order to develop improved polysaccharide-based gels. Rheological and textural analyses revealed that STG significantly increased IC's gel strength without altering its structure. At an optimal STG concentration of 0.8 %, the composite gels showed significant improvements in hardness (25.7 %), chewiness (23.8 %), and gumminess (20.9 %) compared to IC. The sol-gel transition temperature increased from 57.3 °C to 62.1 °C, indicating enhanced thermal stability. FTIR spectroscopy revealed a blue shift in the O H stretching vibration (from 3405 cm −1 to 3421 cm −1 ), confirming stronger hydrogen bonding between the two substances. Observation of the microstructure showed that STG made the loose, uneven network of IC denser and more homogeneous, and improved the water binding capacity. These findings provide new insights into the synergistic interactions between STG and IC and offer a promising strategy for tailoring the functional properties of polysaccharide gels for use in the food and pharmaceutical industries.
To address the “gel weakening” of fish gelatin (FG) under acidic conditions,this study investigates the enhancement of gel performance in FG through the incorporation of locust bean gum (LBG) and explores its feasibility for application in acidic gel systems. Results show that the gel properties of FG were significantly improved through LBG modification. At pH 3−7, gel strength and melting temperature of LBG-modified FG (FG-LBG) surpassed those of unmodified FG (524.68 ± 1.54 g, 28.86 ± 0.03 °C). Specifically, at pH 3, after LBG modification, the gel strength and melting temperature of FG increased by 62.65% and 29.44%, respectively. LBG alters the conformation of FG via electrostatic and hydrogen bonding interactions, forming a denser polymer network. The acidic gel gummies prepared from the FG modified with LBG exhibit superior gel properties and texture characteristics. This study provides a basis for the modification of FG under acidic conditions.
危险品化学品经营许可证（带存储）