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The study aims to investigate the effect of repetitive ultraviolet irradiation (UV-UV) and the combination effect with dimethyl dicarbonate (UV-DMDC-UV) on the physico-chemical properties and microbiological stability of pineapple juice. UV dosages of 10.76mJ/cm 2 percycle and 250ppm of DMDC were used. There was a significant decrease in turbidity, total phenolic and vitamin C in the treated...