SEMI-SIMULTANOUS SACCHARIFICATION AND FERMENTATION OF OPUNTIA FICUS-INDICA CLADODE FOR BIOETHANOL PRODUCTION USING WILD STRAIN. Journal title: International Journal of Advanced Research (IJAR) Authors: Cindy Mariel Lopez-Dominguez, Manuel Octavio Ramirez-Sucre, Ingrid Mayanin Rodriguez-Buenfil. Subject(s):