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Nizar, Umar Kalmar and Putra, Ananda and Sundari, Rita and Latisma, Dj. and Etika, Sri Benti and Bahrizal, Bahrizal and Dewata, Indang and Nasra, Edi and Sanjaya, Hary and Oktavia, Budhi and Wardaningsih, S S K (2018) Synthesis and Characterization of Silica-Titania Catalyst with Solid-State Technique Applying SiO2 and TiO2 Solid Precursors Based on Variation Time of Calcination in Biodiesel Production. In: The 2018 International Conference on Research and Learning of Physics, 5-6 Agustus 2018, Padang.