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Purbowati I.S.M., I.S.M. and Maksum, A. and Ritonga, A.M. and Kurniawan, R.E.K. (2022) Optimization of vitamin c extraction of roselle petals (Hibiscus sabdariffa) assisted with microwaves using response surface methodology. Food Research (Malaysia), 6. pp. 88-95. ISSN 2550-2166