4.7 Article

Modeling of in vitro digestion behavior of corn starches of different digestibility using modified log of slope (LOS) method

Journal

FOOD RESEARCH INTERNATIONAL
Volume 146, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.foodres.2021.110436

Keywords

Modified LOS plot equation; First-order kinetics; In vitro Englyst assay; Starch digestibility; Multi-scale digestion

Funding

  1. National ResearchFoundation of Korea (NRF) - Ministry of Science, ICT, and Future Planning [NRF-2014R1A2A1A11050918]
  2. Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, Forestry and Fisheries (IPET) through the High Valueadded Food Technology Development Program - Ministry of Agriculture, Food, and Rural Affairs [318029-03]

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This study aimed to improve the first-order equation representing in vitro digestion of starch by extensively explaining the modified log of slope (LOS) plot method. The modified method better described the digestive behavior of starch with various digestion properties, providing multiple types of information on the starch fraction.
This study aimed to further improve the previously described first-order equation representing in vitro digestion of starch by extensively explaining modified log of slope (LOS) plot method. Hydrolysis curves of various starches were analyzed using original and/or modified LOS plot methods. Some starches showed significant differences in the results from the two methods; specifically, the modified method better described the digestive behavior of starch with various digestion properties, supported by higher determination coefficient values and better estimation of the digestibility data over digestive phase. The digestion parameters obtained from the modified method provided multiple types of information, including amount and digestion rate of each starch fraction (rapidly digestible, slowly digestible, and resistant starch), supporting the concept of digestible fraction classification. Therefore, the modified LOS plot method described here can be applied as an effective tool for analyzing and describing the multi-scale in vitro digestion behavior of starch.

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