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Farianty, Dhika and Putra, Ananda and Latisma, Dj. and Nizar, Umar Kalmar and Sundari, Rita (2019) Biodiesel Production from Palm and Waste Cooking Oils Catalyzed by Silica-Titania Catalyst with Time Variation. International Journal of Innovative Science and Research Technology, 4 (7). pp. 280-284. ISSN 2456-2165
Zurryati, Zurryati and Sundari, Rita and Bahrizal, Bahrizal and Putra, Ananda and Latisma, Dj. and Nasra, Edi and Kurniawati, Desy and Nizar, Umar Kalmar (2019) The Effect of Silica-Titania Catalyst Loading on the Production of Biodiesel from Palm and Waste Cooking Oil. International Journal of Scientific Research and Engineering Development, 2 (3). ISSN 2581-7175
Viodelf, Tiara and Ellizar, Ellizar and Andromeda, Andromeda and Nizar, Umar Kalmar and Zulnata, Charles (2019) Improving Students' Critical Thinking Skills Through Buffer Solutions Module Based on Scientific Approaches Assisted Probing Prompting Questions at SMAN 1 Payakumbuh. International Journal of Progressive Sciences and Technologies (IJPSAT), 15 (22). pp. 63-67. ISSN 2509-0119
Raffeza, Tamara Putri and Putra, Ananda and Latisma, Dj. and Oktavia, Budhi and Kurniawati, Desy and Etika, Sri Benti and Sundari, Rita and Nizar, Umar Kalmar (2019) The Role of Temperature on Biodiesel Production from Palm and Waste Cooking Oils Catalyzed By Silica-Titania Catalyst. International Journal of Progressive Sciences and Technologies (IJPSAT), 15 (2). pp. 152-156. ISSN 2509-0119
Ardana, Syafira and Putra, Ananda and Latisma, Dj. and Sundari, Rita and Bahrizal, Bahrizal and Etika, Sri Benti and Nizar, Umar Kalmar (2019) The Study of Reused SilicaTitania Catalyst on Biodiesel Production in Various Reaction Times. International Journal of Advances in Scientific Research and Engineering (ijasre), 5 (8). pp. 133-141. ISSN 2454-8006
Amran, Ali and Hardeli, Hardeli and Putra, Ananda and Zainul, Rahadian and Nizar, Umar Kalmar and Yerimadesi, Yerimadesi and Beri, Deski and Effendi, Effendi (2019) Kimia Fisika: Penuntun Pratikum. Other. Kimia FMIPA UNP, Padang.
Aini,, Syamsi and Azra, Fajriah and Nizar, Umar Kalmar (2018) Sintesis dan Karakterisasi Fe3O Terimmobilisasi Silika Mesopori Berbasis Green Chemistry sebagai Katalis Heterogen untuk Penguraian Azo-Dye. Project Report. Fakultas Matematika dan Ilmu Pengetahuan Alam, Padang.
Nizar, Umar Kalmar and Putra, Ananda and Latisma, Latisma (2018) Sintesis dan Karakterisasi Silika-Titania dengan Kerangka Tetrahedral Titanium sebagai Katalis dalam Pembuatan Biodiesel. Project Report. FMIPA UNP, Padang.
Putra, Ananda and Mahda, Atia and Nizar, Umar Kalmar and Beri, Deski and Amran, Ali (2021) Association Structure and Solubility Dynamic of Methyl Red and Methylene Blue in the System of Water, Sodium Dodecyl Benzene Sulfonate and Pentanol. In: 3rd International Conference on Research and Learning of Physics (ICRLP) 2020, 2020.
Nizar, Umar Kalmar and Hidayatul, J and Sundari, Rita and Bahrizal, Bahrizal and Amran, Ali and Putra, Ananda and Latisma, Dj. and Dewata, Indang (2018) The Effect of Titanium Tetrahedral Coordination of Silica- Titania Catalyst on the Physical Properties of Biodiesel. In: IOP Conference Series: Materials Science and Engineering, Volume 335, The 2nd International Conference on Mathematics, Science, Education and Technology, 5-6 Oktober 2017, Padang.
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.
Nizar, Umar Kalmar and Sitanggang, Yohanes Manan and Sari, Risma and Sundari, Rita and Bahrizal, Bahrizal and Putra, Ananda and Latisma, Dj. (2017) The Correlation of Biodiesel Physical Properties and Titanium Tetrahedral Coordination in Silica-Titania Prepared by Different Moles Ratio of Titania Precursors. In: Proceedings of ICoChEA (International Conference On Chemistry And Engineering In Agroindustry), 2017, Indonesia.
