10 



I. NAGAI : 



Table 5. 



Influence of animal charcoal on the decolorization of 

 nnthocyanin by hydrogen peroxiile. 



Charcoal added in gram. 

 (.'I) 



No. of mimites required for 

 decolorization (<) 



<ll 



Wliou the concentration of hydrogen pei-oxide varied and the amount of 

 animal charcoal made constant, at the tem^jerature 20.0 C, the following result 

 ■was olitained. 



Table 6. 



Same as Table 5. 



It seems clear, from the data so far presented, that although the oxidizing 

 enzymes, are univei-sally present in the plant cell, pai-ticuLirly co-existing -w-ith 

 anthocyauin, and although the normal oxygen relation is essential to the 

 formation of anthocyanin in the living tissue as we shall see later, yet these 

 enzymes Lave no direct relation to the formation of anthocyanin from flavone. 

 On the contrary, anthocyanin is converted to a flavone-like yellow suljsüiuce 

 by the action of the oxidizing enzymes. 



