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Title: Enhancement effect study of some organic acids on the calcium availability of vegetables: Application of the dynamic in vitro simulated gastrointestinal digestion method with continuous-flow dialysis
Authors: Juwadee Shiowatana
Sopon Purawatt
Upsorn Sottimai
Sutthinun Taebunpakul
Atitaya Siripinyanond
Mahidol University
Keywords: Agricultural and Biological Sciences;Chemistry
Issue Date: 29-Nov-2006
Citation: Journal of Agricultural and Food Chemistry. Vol.54, No.24 (2006), 9010-9016
Abstract: The effect of added organic acids on the calcium availability of vegetables was investigated using the dialysis profiles obtained from an in vitro simulated gastrointestinal digestion with continuous-flow dialysis method. Citric acid was the most effective enhancer followed by tartaric, malic, and ascorbic acids. For amaranth, which has a low calcium availability (5.4%), a significant increase of availability was observed with increasing concentrations of all acids studied. With the continuous-flow dialysis approach, organic acids could be observed to promote the dialyzability even at an elevated intestinal pH. An enhancement effect from added organic acids was not clearly observed for Chinese kale, which itself contains a high amount of available calcium (52.9%). © 2006 American Chemical Society.
ISSN: 00218561
Appears in Collections:Scopus 2006-2010

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