I 9 jo] 



ROSE, KRAYBILL, &■ ROSE— OXIDASE ACTIVITY 



224 



TABLE III 



Effect of 0.10N KC1 and K 2 CO., on oxidation of pyrogallol by powdered 



DISEASED APPLE BARK; TEMPERATURE 27.8-29.0° C. 



Time of reading 



March 10 

 10.00 

 10.15 



10.30 



10.4s 

 11 .00 

 11. 15 

 11.30 



n-45 

 12.00 

 12.15 

 12.30 



12.45 

 1 .00 

 March n 

 9-45 



NO BARK 



K.COj 



OO 



68 



24 



65 

 98 



25 

 38 

 52 

 65 

 75 

 78 

 85 

 99 



3-53 



KC1 



0.00 

 -0.05 



0.00 



0.00 

 -0.08 

 -0.03 

 -0.03 



0.00 

 -0.05 



0.00 

 -0.05 

 -0.08 

 -0.05 



-o. 10 



Check 



O.co 



o 13 



o. 



o. 



o 



o 



o 



o 



30 



50 

 65 

 72 



85 



99 

 1 .04 



I 15 

 1. 18 

 I 25 

 1.38 



20 



Hark 



K,C0 3 



O.OO 

 O.46 

 O.90 



1 -25 

 I 

 I 

 I 



2 

 2 



SO 



72 



93 

 09 

 22 

 2-35 

 2.39 

 2-55 

 2.65 



3-73 



KC1 



0.00 

 o. 16 



033 



0.38 



0.48 



o.do 



o 



o 



o 



o 



o 



I 



I 



69 



82 



88 

 95 

 95 

 .00 

 . 10 



i-73 



1 2 3 



Fig. 3.— Effect of KC1 and K 2 C0 3 on oxidation of pyrogallol with and without 

 bark (diseased): A, control (bark and pyrogallol); B, K 2 COj+bark and pyrogallol; 

 C, K 2 COj+ pyrogallol; D, KCl+bark and pyrogallol (KCl+pyrogallol gave no 

 oxidation). 



