Thermal, high pressure, and ultrasound inactivation of various fruit cultivars’ polyphenol oxidase: kinetic inactivation models and estimation of treatment energy requirement by Zawawi, Nur Aribah Fatini, Md. Hazmi, Nurul Ashikin, How, Muhammad Syahmeer, Kantono, Kevin, Silva, Filipa V. M., Sulaiman, Alifdalino