Related Experiment Video
Updated: Sep 10, 2025

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
Published on: October 31, 2019
Temperature-Mediated Gel Texture Transformation in Starch Noodles: In Respect of Glass Transition Temperature Tg'
Hongxiao Liu1,2, Qing Hu1,2, Sha Yang2
1College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China.
None:
Potato starch noodles (PSN), a characteristic gluten-free Asian food, are essentially high-concentration starch gels (about 35% starch) formed through gelatinization and retrogradation. This study systematically investigates freezing temperature effects, particularly across the glass transition temperature, on PSN texture and microstructure. We found that fresh PSN have a freezing point of -1 °C, supercooling temperature of -4.5 °C, and a Tg' value of -3.1 °C. Freezing significantly reduced the adhesiveness of PSN and increased the hardness. During the 48 h freezing process, noodles frozen at -3 °C, the closest to Tg', exhibited the highest hardness (14,065.77 g), springiness (0.98), cohesiveness (0.93), chewiness (11,971.06), and resilience (0.84), and the least adhesiveness. PSN frozen within the range near Tg' (-3 °C) showed superior texture, continuous solid cross-section, and dense surface, attributed to the reverse transformation of starch, high mobility of starch chains, and smaller ice crystals. PSN frozen at -3 °C for 24 h displayed the most compact and desirable texture compared to the other samples. These findings deepen the understanding of the role of glass transition temperature in the texture formation of starch gel during freezing and provide valuable insights for optimizing the frozen processing of starch gel-based food.
More Related Videos
Related Concept Videos
Problem Solving on Stress and Strain
Heating and Cooling Curves
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
Thermal Strain
Le Chatelier's Principle: Changing Temperature
To understand this phenomenon, consider the elementary reaction:
Phase Transitions: Melting and Freezing
Temperature Dependent Deformation

