Alfian, F.R. , Faiq, F.Y. , Rizaldy, R. and Haq, K.U. 2024. Semi-empirical study of acetic acid esterification and methyl ester transesterification reactions with Nafion catalyst using PM7 level of theory. Journal of Bio-molecule Research And Engineering. 1, 2 (Dec. 2024), 73–88. DOI:https://doi.org/10.20473/jbiome.v1i2.51930.