posted on 2017-11-29, 11:03authored byAline Soares Cascaes Teles, Davy William Hidalgo Chávez, Flávia dos Santos Gomes, Lourdes Maria Corrêa Cabral, Renata Valeriano Tonon
Abstract The objective of this study was to evaluate the effect of temperature and drying time on the total phenolic content and antioxidant capacity of grape pomace. Experimental data of the drying kinetics were fitted to six mathematical models and the Page model was selected as the most suitable to represent the drying of grape pomace. The best preservation of the phenolic compounds and antioxidant capacity was observed at 60 °C, suggesting that the temperatures of 40 °C and 50 °C were not sufficient to inactivate the enzyme polyphenol oxidase, being responsible for the greater degradation of these compounds.