Abstract
Due to the limitations of the properties of chestnut flour, its applications have been restricted. The objective of this study is to investigate the impact of whey protein isolate (WPI) and xanthan gum (XG) on the functional and digestive properties of chestnut flour, specifically focusing on gel texture, solubility and swelling power, water absorption capacity, freeze-thaw stability and starch digestibility. The addition of both WPI and XG reduced the gel hardness, gumminess and chewiness of the co-gelatinized and physically mixed samples. Furthermore, the inclusion of physically mixed WPI and XG led to an increase in the solubility (from 58.2 to 75.0%) and water absorption capacity (from 3.11 to 5.45 g/g) of chestnut flour. The swelling power of the chestnut flour was inhibited by both additives. WPI was superior to XG at maintaining freeze-thaw stability, by reducing the syneresis from 71.9 to 68.1%. Additionally, WPI and XG contributed to the inhibition of starch hydrolysis in the early stage of digestion, resulting in a lower starch digestibility of chestnut flours. This research provides insights into the interaction mechanisms between WPI, XG, and chestnut flour, offering valuable information for the development of chestnut flour products with enhanced properties.
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The authors are thankful for the support of the Open Project of China Food Flavor and Nutrition Health Innovation Center (CFC2023B-037).
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Qingyu Wang: Writing - Original Draft, Writing - Review & Editing, Data Curation; ; Jie Ouyang: Conceptualization, Writing - Review & Editing, Supervision; Luyu Wang: Methodology, Investigation, Validation, Data Curation; Yanwen Wu: Project administration; Chunming Xu: Funding, Project administration.
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Wang, Q., Ouyang, J., Wang, L. et al. Impact of Whey Protein Isolate and Xanthan Gum on the Functionality and in vitro Digestibility of Raw and Cooked Chestnut Flours. Plant Foods Hum Nutr 79, 189–193 (2024). https://doi.org/10.1007/s11130-024-01150-5
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DOI: https://doi.org/10.1007/s11130-024-01150-5