%0 Journal Article %T Alteration in amino acid composition of natural solid bitumens and some synthesized carbonaceous materials in the carbonization sequence %A Shanina, S.N. %A Golubev, E.A. %A Amosova, O.E. %K natural solid bitumens; graphites; aminoacids; glassy carbon, carbon black Mann — Whitney U test; Generalized Dicriminant Analysis, Classification Trees Method %J Vestnik of geosciences %D 2022 %N 0 %P 12 %I FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"