58 LECTURES ON IMMUNITY 



ACTION OF INVERTASE ON 100 c.c. OF SUGAR SOLUTION (BROWN) l 



PER CENT SACCHAROSE 



GRAMMES INVERTED IN i H. 



0.25 



-5 

 i.o 



0.060 

 0.129 

 0.249 



ACTION OF LACTASE ON 100 c.c. OF MILK SUGAR SOLUTION (ARMSTRONG) 



PER CENT MILK SUGAR 



AMOUNT CHANGED IN 3 H. 



0.2 



I.O 



0.042 

 0.098 

 0.185 



If the enzyme is present in small proportion, the trans- 

 formed quantity is proportional to its quantity, as is seen 

 from the following experiments of O'Sullivan and Tomp- 

 son 2 and Armstrong. 



HYDROLYSIS OF CANE SUGAR TO 78 PER CENT BY MEANS OF 



INVERTASE AT 15.5 (O'SULLIVAN AND TOMPSON) 



0.15 g. inv. time 283 min. (calc. 307 ) 



0.45 g. inv. time 94.8 min. (calc. 92.1) 



1.5 g. inv. time 30.7 min. (calc. 30.7) 



HYDROLYSIS OF A 5 PER CENT SOLUTION OF MILK SUGAR (looc.c.) 



SOLUTION CONTAINING 



AFTER 24 HOURS 



0.66 c.c. of lactase 



1 c.c. of lactase 



2 c.c. of lactase 

 5 c.c. of lactase 



OBS. CALC. 



2.3 p. C. 2.1 



3.2 p. c. 3.1 



6.3 p. c. 6.2 

 15.4 p. c. 15.5 



1 Brown: Journ. Chent. Soc. 81. 387 (1902). 



2 O'Sullivan and Tompson : Journ. Chem. Soc. 57. 865 (1890). 



