CONTENTS 



PAET H 

 THE INCOME OF ENERGY 



I 



FERMENTATION 



Page 

 HYDROLYSIS OF STARCH BY DIASTASE ...... 189 



Conversion of starch to sugar by germinating barley Con- 

 version of starch to sugar by salivary diastase (ptyalin) 

 Extraction of diastase from germinating barley Specific 

 action of ferments. 



PROTEID DIGESTION BY PEPSIN ........ 192 



Gastric digestion of cooked beef and bread Artificial 

 gastric juice Digestion with artificial gastric juice 

 Extraction of pepsin Change of proteid to peptone by 

 pepsin. 



SPLITTING OF CASEIN BY RENNIN ....... 195 



Rennin extract Separation of rennin Precipitation of 

 * casein Experiments of Arthus and Pages. 



PRECIPITATION OF FIBHIN BY FIBRIN FERMENT . . . 199 

 Buchanan's experiment Extraction of fibrin ferment 

 Extraction of fibrinogen Precipitation of fibrinogen by 

 fibrin ferment. 



AMMONIACAL FERMENTATION OF UREA BY UREASE . . 201 

 Extraction of urease. 



SPLITTING AND SYNTHESIS OF FATS . . . . . . . 205 



Chemistry of fats and soaps Splitting of fats by the pan- 

 creatic juice Preparation of neutral fat The emulsion 

 test for fatty acid Extraction of lipase Hydrolysis 

 of ethyl butyrate by lipase Synthesis of neutral fat 

 by lipase. 



