Transformations of Phenolic Compounds in an in vitro Model Simulating the Human Alimentary Tract

• Main Authors: Aleksandra Duda-Chodak, Paweł Sroka, Paweł Satora, Jolanta Michalik, Tomasz Tarko
• Format: Article
• Language: English
• Published: University of Zagreb 2009-01-01
• Series: Food Technology and Biotechnology
• Subjects: phenolic compounds; fruits; in vitro digestion; dialysate membranes; antioxidant activity
• Online Access: http://hrcak.srce.hr/file/68402

The aim of this work is to establish the antioxidant properties of polyphenolic compounds of selected fruits before and after their transformations during digestion. The experiment was conducted in in vitro conditions on a set of dialysis membranes which simulated the human digestive tract. Apples of the Šampion, Malinowka and Golden Delicious cultivars, black chokeberry, banana, Wegierka zwykla blue plum, melon and Lukasowka pear were chosen for examination. It was found that compounds obtained after simulated digestion of chokeberries, pears and bananas showed lower antioxidant potential than fresh fruits, while the opposite results were obtained for apples and plums. All dialysates obtained after digestion were characterized by lower content of total polyphenols in comparison with raw material (fresh fruits). It was found that the polyphenols were hydrolyzed, especially glycosides of quercetin and cyanidin. Phenolic acids and cyanidin were characterized by low availability for absorption, whereas catechin and quercetin had a very high level of accessibility in the model small intestine.