Ainiyah, N.; Erikania, S.; Nurmaulawati, R. Antioxidant Activity Test of Purified Extracts from Sea Lettuce (Ulva Lactuca L.) from Pidakan Pacitan Beach Waters Using the DPPH (1,1-Diphenyl-2-Picrylhydrazyl) Method. JFSI 2024, 6, 61-70.