1 76 SOURCES OF ENERGY IN ANAEROBfOSTS 



TABLE 22 



Glucose Consumption of Pkotozoa Capable of Aerobic Fermentations. 



The amount of sugar consumed is expressed in milligrams 



Feeding and injection experiments performed by Wein- 

 land and Ritter (1902) with Ascaris showed a glycogen- 

 sparing action of glucose, fructose, maltose, and perhaps 

 galactose, but not of lactose. They concluded that the 

 former sugars were probably utilized. Holfmann (1934) 

 and Kriiger (1936) demonstrated with the same worm 

 that the heat production and the oxygen consumption in- 

 crease if the animals have the opportunity of absorbing 

 glucose and other sugars from the medium. Whether, 

 however, under these conditions, the fermentations in the 

 presence of oxygen increase correspondingly, has not 

 been sufficiently studied. 



Weinland (1901) stated that ascarids starving under 

 anaerobic conditions consume from their body reserves 

 0.1 g. glucose per 100 g. body weight per 24 hours, be- 

 sides a much larger amount of glycogen. According to 

 him the glucose content of the worms is 1.6 per cent by 



