36. 5 concentration dependence of D Matano method ◆|.D- C dependence Matano method CO、aC (D-) at ax ax D= D(C tt=0 for x>o for x<0§6.5 concentration dependence of D. Matano method ◆ Ⅰ.D-C dependence ◆ Ⅱ.Matano method ( ) (1) x C D t x C     =   (2) for 0 at 0 for 0 2 1 =  = =  C C x t C C x D = D(C)