Concentration Effect of MgO/K2O Catalyst on Transesterification of Castor Seed (Ricinus communis) Oil: Pengaruh Konsentrasi Katalis MgO/K2O pada Transesterifikasi Minyak Biji Jarak (Ricinus communis). Stannum : Jurnal Sains dan Terapan Kimia, [S. l.], v. 6, n. 2, p. 96–103, 2024. DOI: 10.33019/jstk.v6i2.4692. Disponível em: https://www.journal.ubb.ac.id/index.php/stannum/article/view/4692. Acesso em: 27 apr. 2026.