PENGARUH PENYANGRAIAN DENGAN ENERJI GELOMBANG MIKRO TERHADAP POLIFENOL DALAM HANCURAN KEPING BIJI KAKAO (Effects of Microwave Roasting on Polyphenols in Ground Cocoa Nibs) - Supriyanto, Supriyanto (Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, 2006)