Effect of carboxymethylcellulose sodium addition as stabilizer for physicochemical characteristic of purple sweet potato fortified yogurt (Ipomoea batatas L.) - Lantika, Uci Ary; Medical Biology Departement, Faculty of Medicine, Universitas Islam Bandung Jl. Tamansari No.1 Bandung 40116, West Java, Indonesia (Universitas Ahmad Dahlan, 2021)