Prof. Dr. H. Thamrin Usman, D.E.A

H2O2-Modified Geopolymers as Integrated Adsorbent Catalysts for FFA Removal and Biodiesel Production from Crude Palm Oil (Nelly Wahyuni, Thamrin Usman, M. Ilham Ramadhan, Ismail Astar), Indonesian Journal of Science & Technology 10(1) (2025) 113-132

Biodiesel Synthesis of Crude Palm Oil By Using Bifunctional Catalyst Sn/Kaolinite and K2CO3 (Abdullah Yamani Noor, Thamrin Usman, Nelly Wahyuni), EduChemia – Jurnal Kimia dan Pendidikan Vol 9, No, 2, 2024, p.149-161

Synthesis of Biodiesel in Low-Grade Palm Oil using Geopolymer-ZnO Catalyst (Yaasinta Lafasha Nabila, Thamrin Usman, Andi Hairil Alimuddin), agriTECH, 44(3), 279-288. (2024)

Reducing Free Fatty Acids in Crude Palm Oil Using Diethylene Glycol and Zinc (II) Chloride Based Deep Eutectic Solvent (Lieli Suriyanti, Thamrin Usman, Winda Rahmalia), Indonesian Journal of Chemistry, 24(3), 691-700. (2024)

Performance test of Zn-astaxanthin complex-sensitized solar cell: effect of light intensity on open-circuit voltage and short-circuit current values (Septiani Septiani, Winda Rahmalia, Thamrin Usman), Turkish Journal of Chemistry, 48(2), 210-217. (2024)

Extraction of astaxanthin from fermented Acetes using virgin coconut oil with the glass beads vortex method (Dwi Fitriani, Winda Rahmalia, Puji Ardiningsih, Thamrin Usman, Siti Nani Nurbaeti, Dwi Imam Prayitno), OCL, 30, 4. (2023)

Astaxanthin and omega-3-rich oil from fermented Acetes (cincalok) and its application as bioactive additive and sunscreen in lotion (Winda Rahmalia, Christina Dasilia, Thamrin Usman, Dwi Imam Prayitno, Siti Nani Nurbaeti), OCL, 29, 18. (2022)