SIMPLIFIED FORMULAS FOR SOME BESSEL FUNCTIONS AND THEIR APPLICATIONS IN EXTENDED SURFACE HEAT TRANSFER by Irvan Irvan, Zahedi Zahedi, Anjar Agus, Sarmin Suparni, Harahap Amin

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Rapid Determination of Microbial Quinones using Supercritical CO2 Extraction by Muhammad Faisal, Irvan Irvan, Yoichi Atsuta, Hiroyuki Daimon, Koichi Fujie

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Sustainable lipid production from Chlorella vulgaris USU1 strain using packed absorption column-derived effluent as carbon source for biomass generation by Bambang Trisakti, Rivaldi Sidabutar, Irvan Irvan, Erman Munir, Maya Sarah, Farida Hanum, Mhd. Rivaldi Syahputra, Michael Michael, Vanness Vanness, Gloria Clarita Sinamo, Renata Ambarita, Mawardyah Sidauruk, Selvia Geraldine Silaban, Yasmin Nabilah, Hiroyuki Daimon, Mohd. Sobri Takriff, Peer Mohamed Abdul

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