1918] 
BONNS—ETHERIZATION AND ENZYME ACTIVITY 281 
eorms, and that because of such difference the action of the 
former was retarded in the presence of the acid. 
'Table v is concerned with the results of the catalase experi- 
ments with fresh extracts from the etherized and the control 
corms. 
TABLE V 
CATALASE ACTION OF FRESH EXTRACTS OF ETHERIZED AND UNETHERIZED 
GLADIOLUS. CORMS ON HYDROGEN PEROXIDE 
Cubic centimeters oxygen 
Time from 
Concentration intervals 52 ДЕЙ 
іп minutes atalase trom 
etherized corms Controls 
0.5 1-7 2:7 
I. 1 cc. extract ri as к 
cc. water у ` Н 
5 сє. НО 2.0 0.9 0.8 
гала 5 1.0 0.8 
3.0 0.5 0.7 
Total... 3.0 6.1 7.4 
0. 2.0 ра 
1.0 3.5 12.2 
1. 3.3 3.3 
II. 5 cc. extract X 21 ү 
5 сс. Н.О 3. ) 18 11 
3. Ж; .0 
4.0 .4 .6 
1. 52 5 
Total... 4.5 19.6 39.2 
025 16.6 12.0 
1.0 3.2 8.2 
1-5 2.6 4.9 
2.0 2.8 2.8 
III. 5 cc. extract 2.5 2.1 1.2 
5 сс. НО: 3.0 1.3 1.8 
a5 1.5 1.6 
4.0 1.0 1.4 
4.5 1.1 1.1 
5.0 1.1 1.1 
Total... 5.0 32.9 36.1 
The results of the catalase determinations point conclu- 
sively to an inhibition of catalytic activity immediately fol- 
lowing the period of etherization. This accords in part with 
the findings of Burge (717) in his studies of blood catalase. 
Whether the enzyme returns to normal activity if the corms 
