Cahyono Hary, Utomo STUDI PENDEKATAN TERMAL SOLVEN DAN WAKTU KONTAK PADA EKSTRAKSI BERTINGKAT KOMPONEN BIOAKTIF PESTISIDA BUNGA KENCANA UNGU (Ruellia simplex) STUDY OF THERMAL APPROACH OF SOLVENT AND CONTACT TIME IN MULTIPLE EXTRACTION OF BIOACTIVE COMPONENTS OF PURPLE FLOWER PESTICIDE (Ruellia simplex. jurnal.