Assessment of Antioxidant and Phenolics Content of Various Drying Techniques (Hibiscus sabdariffa roselle L.) Calyx UKMR-1 - Abubakar A. Lema; Mahmoud D. Abdulrahman; Nor H. Mahmod; Moneruzzaman M. Khandaker; Sarwan W. Bradosty (4th International Conference on Biological & Health Sciences (CIC-BIOHS'2022), 2022)