Study of betacyanin level from cactus fruit (Opuntia elatior Mill) in Palu city using spectrophotometry UV-VIS. International Journal of Phytopharmacy, [S. l.], v. 6, n. 4, p. 85–89, 2016. DOI: 10.7439/ijpp.v6i4.3085. Disponível em: https://www.ssjournals.co.in/index.php/ijpp/article/view/3085. Acesso em: 15 mar. 2026.