38 IOWA ACADEMY OF SCIENCE 



Table 1 gives some of the details of sucli a digestion showing 

 that asparagin acts as an auxoamylase but acetamid does not. 



TABLE NO. 1. 

 ACETAMID AND ASPARAGIN. 



Each contained 5 cc. toluene and 180 cc. 1 per cent starch. 



A. 10 cc. water and 10 cc. of 3 per cent saliva. 



B. 0.5 grin, acetamid in 10 cc. water and 10 cc. saliva. 



C. 0.5 grm. asparagin, (neutralized) in 10 cc. of water and 10 cc. of 

 3 per cent saliva. 



Degree of digestion shown by cc. of Na.SAi used: 



Digested one hour. Digested two hours. 



A= 4.45 cc. Na 2 S 2 O a A= 8.6 cc. Na 2 SA 



B= 4.18 cc. " B= 8.9 cc. 



C= 5.90 cc. " C=10.1 cc. 



Digested four hours. Digested six hours 



A=15.1 cc. Na^SA A=17.9 cc. Na.SA 



B=14.85 cc. " B=17.0 cc. 



C=18.35 cc. " C=19.1 cc. 



Digested 24 hours. 



A=25.0 cc. Na 2 SA 



B=24.5 cc. 



C=27.8 cc. 



In the succeeding tables the details are omitted but the figures, 

 as before, represent the amounts of sugar formed from the 

 starch. 



TABLE NO. 2. 



ACTION OP GLYCINE. 



200 cc. of starch-saliva solution used. 



Glycine used 0.5 hour 1.5 hours 4.0 hours 5.5 hours 



None 3.95 9.70 16.1 18.75 



0.1 grm 6.00 11.25 17.2 20.40 



0.3 grm 9.00 12.80 18.7 21.20 



0.5 grm 8.20 16.50 22.2 23.25 



TABLE No. 3. 



TYROSINE. 



Tyrosine used 40 min. 1.75 hrs. 4 hrs. 6.25 hrs. 24 hrs. 



None 1.25 5.35 9.65 11.15 18.55 



0.05 grm 2.85 6.20 11.30 13.72 22.25 



0.1 grm 3.35 6.55 12.10 13.65 24.00 



The volume of the digestion solution was 200 cc. 



The amylase was ptyalin. 



