4.7 Article

High Protein Yangyu jiaotuan (sic): In Vitro Oral-Gastro-Small Intestinal Starch Digestion and Some Physico-Chemical, Textural, Microstructural, and Rheological Properties

期刊

FOODS
卷 12, 期 13, 页码 -

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MDPI
DOI: 10.3390/foods12132460

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potato; Yangyu jiaotuan; microstructure; starch digestion in vitro

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Biomimetic foods have the potential to improve health by managing and preventing chronic diseases. In this research, plant proteins (soy protein isolate-SPI and pea protein isolate-PPI) were added to Yangyu jiaotuan to develop a product with reduced glycemic properties and high protein content. The results showed that the textural properties did not change significantly during storage, and protein addition protected the microstructure of the product during starch retrogradation.
Biomimetic foods are expected to have potential health benefits for the management and prevention of chronic diseases, such as diabetes and cardiovascular disease. In the current research, two commercially available and affordable plant proteins (soy protein isolate-SPI and pea protein isolate-PPI) at two levels (5%, 10%) were added to the Yangyu jiaotuan with the objective of developing a product with reduced glycaemic properties and high protein content while maintaining its original taste and texture. The results showed that several important textural properties such as hardness and chewiness did not change significantly during the refrigerated storage. The storage modulus G' increased with refrigerated storage time for different samples, but there were significant differences among the five samples (with and without protein addition) with respect to frequency dependence during rheological measurements. The in vitro starch digestion experiments showed that the starch hydrolysis of Yangyu jiaotuan decreased considerably (by up to 42.08%) with the increase in PPI content and during refrigerated storage due to starch retrogradation. Protein has protected the microstructure and there was less damage when compared to samples without protein. The bimodal peaks of the particle size distribution curves showed that the newly developed Yangyu jiaotuan contains two different sizes of particles; the smaller particles (similar to 30 mu m) corresponded to PPI and starch granules, while the larger particles corresponded to the fragments of the gel network of the starch matrix. Based on the above results, Yangyu jiaotuan mixed with pea protein is a convenient potato staple food product, which complies with the biomimetic potato food very well.

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