2026-07-12T15:50:39Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/47442022-04-29T12:02:46Zcom_10259_4244com_10259_5086com_10259_2604col_10259_4245

00925njm 22002777a 4500 dc Illera Gigante, Alba Ester author Sanz Díez, Mª Teresa author Benito Román, Oscar author Varona Fernández, Sandra author Beltrán Calvo, Sagrario author Melgosa Gómez, Rodrigo author García Solaesa, Ángela author 2018-06 Cloudy apple juice has been treated by thermosonication in batch mode as an alternative processing to thermal treatment. Thermosonication was found to be effective to inactivate polyphenol oxidase; however, pectinmethylesterase was found to be more resistant. An increase of the working ultrasound amplitude and the amount of energy supplied to the juice led to lower enzyme residual activities. Enzyme inactivation kinetics were determined at different temperatures (from 44 to 67 °C). Inactivation data were described by the first order kinetic model and the Weibull model, both models yielding good fitting. Thermosonication treatment caused a homogenization effect reflected in the shifting of the particle size distribution towards smaller diameters. The effect of the nature of dissolved gases in the juice on enzyme inactivation was studied by displacing the air dissolved in the juice by bubbling nitrogen or carbon dioxide, previous to the thermosonication experiments. Higher inactivation rates were obtained by displacing the air with nitrogen. Industrial relevance Consumers demand of natural and fresh-like products has driven the food industry to investigate alternative technologies to replace conventional food heat treatments that may affect food quality. Among these technologies, thermosonication treatment is an attractive technology that can inactivate microorganisms and enzymes. This work shows that some enzymes that cause deleterious effect on cloudy apple juice can be more effectively inactivated by thermosonication than by thermal treatment, in the same temperature range, reducing the damages caused by heating. 1466-8564 http://hdl.handle.net/10259/4744 10.1016/j.ifset.2018.02.001 Cloudy apple juice Thermosonication Enzyme inactivation Dissolved gases Effect of thermosonication batch treatment on enzyme inactivation kinetics and other quality parameters of cloudy apple juice