(Raman   value   R=intensity   (Subscript[I, B])   of   peak   (Subscript[P, B])   near   1,360   (cm^(-1))/intensity   (Subscript[I, A])   of   peak   (Subscript[P, A])   near   1,580   (cm^(-1))   by   Raman   spectrum   analysisEquation   (1H)(Δ TG/SA)=(thermal   weight   loss   (Δ TG)   (%)   on   heating   from   400°   C.   to   600°   C.   at   2°   C./min   in   air   atmosphere,measured   with   differential   thermal   balance)/(specific   surface   area   (SA)   ((m^2)/g)   of   carbon   material   determined   by   BET   method)Equation   (2H))