ACTION OP AMINO GROUP ON AMYLOLITIC ENZYMES 55: 
NO. 138. 
1 hour 
2 hrs. 
4 hrs. 
6 hrs. 
Standard . 
5.3 
8.7 
11.3 
12.4 
Ammonium 
sulphate 
6.9 
10.3 
12.5 
13.1 
Ammonium 
thiocyanate . . 
6.6 • 
9.3 
12.5 
13.2 
Ammonium 
acetate 
4.6 
6.2 
9.8 
10.2 
NO. 140. 
1 hour. 
2 hrs. 
4 hrs. 
6 hrs. 
Standard .. 
4.4 
8.8 . 
13.6 
17.5. 
Ammonium 
nitrate 
4.7 
9.9 
14.9 
17.6 
Ammonium 
oxalate 
4.2 
6.1 
9.9 
12.8 
NO. 141. 
1 hour. 
2 hrs. 
4 hrs. 
6 hrs. 
Standard . 
10.9 
14.0 
15.8 
17.4 
Ammonium 
acetate 
8.0 
10.7 
12.6 
15.4 
Ammonium 
chloride 
...15.7 
17.8 
18.9 
20.0 
Ammonium 
oxalate 
8.3 
11.5 
15.7 
18.7 
NO. 142. 
1 hour. 
2 'hrs. 
4 hrs. 
6 hrs. 
Standard . 
1.0 
2.4 
. 4.8 
6.7 
Ammonium 
malate 
1.1 
2.7 
5.2 
6.4 
Ammonium 
tartrate 
............ 1.4 
2.8 
5.8 
7.5 
From the above it is seen that the ammonium salts of the 
strong acids (nitric, sulphuric, hydrochloric and thiocyanic) 
have a more marked effect than those of the weak acids (acetic, 
malic and tartaric) ; oxalic acid does not conform to the rule. 
Department of Chemistry, 
State University. 
