期刊
FOOD HYDROCOLLOIDS
卷 128, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodhyd.2022.107573
关键词
Glass transition temperature; Prediction; Multicomponent system; Fruit powders; Water activity
资金
- New Zealand Ministry for Business, Innovation and Employment through the Food Industry Enabling Technologies (FIET) program [MAUX1402]
The right storage conditions for food powders containing amorphous carbohydrates are crucial to avoid structural changes. This study combines sorption isotherm and glass transition temperature (Tg) data to predict the stability of food powders. The results demonstrate the effectiveness of the method in predicting the relation between Tg and water activity for carbohydrate mixtures.
The right storage conditions for food powders containing amorphous carbohydrates are crucial to avoid structural changes. By combining the sorption isotherm and the glass transition temperature (T-g) data for these food powders enables the determination of appropriate moisture and temperature conditions for their storage. In this study, the modified Flory-Huggins free volume theory was utilized to predict the stability diagrams purely from the composition of the powders. The validation of the approach using the literature data of blends of grapefruit, mango and acai powders with various blends of maltodextrin (MD) and gum Arabic. The blends of fructose, glucose individual and in combination with citric acids as well as blackcurrant juice concentrate with MD DE 9-13 were also investigated. The alignment of experimental and predicted data of fruit powders demonstrates that it was possible to predict the relation of the T-g well as a function of the water activity for carbohydrate mixtures.
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