Authors: Yidi Cai, Yukiharu Ogawa
Published in: CSBE-SCGAB Technical Conferences » 5th CIGR and AGM Quebec City 2021 » Regular Sessions
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Description: This study aimed to examine the effect of structural attributes of edible plant tissues on the release of intracellular substances from cell matrices during digestion. Citrus peel was regarded as a model of plant tissue. A flavedo layer of citrus peel was grated to obtain a crude tissue. The tissue was freeze-dried, pulverized and sieved to collect powdered samples which were separated four fractions with different particle size distributions. The powder fractions were regarded as different structural samples which were attributed as various degrees of cell damage. The sample powders were soaked in distilled water and digested by simulated in vitro gastrointestinal digestion model. The digested fractions and solutions were taken during digestion and used to evaluate the total polyphenols content and antioxidant activity assays, i.e. DPPH free-radical scavenging activity, ABTS free-radical scavenging assay, metal ion chelating (MIC) activity and ferric reducing antioxidant power (FRAP). The results showed that the antioxidant activities were stable in the simulated gastric and small intestinal digestion processes although the values were different. However, the values for each fraction were varied that could relate to the structural tissue attribute. These results suggested that the release of antioxidant compounds in plant foods after swallowing could be related to their structural attributes such as cell damages. This also could indicate that the bioavailability of plant food nutrients would be influenced by the degree of mastication.
Conference name: 5th CIGR International Conference and CSBE-SCGAB AGM 2021, Quebec City,QC, 11-14 May 2021.
Session name: Food 3 - Processing
Publication type: Presentation
Language 1: en
Rights: Canadian Society for Bioengineering