xii CONTENTS 



CHAPTER VI. 



PAGE 



PRECIPITATION OF VEGETABLE PROTEINS- - - 35 



(a) Precipitation by Neutral Salts - -35 



(b) Precipitation by Dilution or by Dialysis - - 35 

 (<r) Precipitation by Acids - , -- - 36 



CHAPTER VII. 



DENATURING OF VEGETABLE PROTEINS - - 37 



(a) Denaturing by Acids - - 37 



(b) Denaturing by Alkalies - - - -42 



(c) Denaturing by Alcohol - - - - 43 



(d) Denaturing by Metallic Salts - - - 43 



(e) Denaturing by Heat - 44 



CHAPTER VIII. 



PHYSICAL CONSTANTS OF VEGETABLE PROTEINS - - 47 



(a) Specific Rotation of Vegetable Proteins - - 47 



(b) Heat of Combustion of Vegetable Proteins - - 48 



(c) Ultimate Composition of Vegetable Proteins - 50 



(d) Fractional Precipitation with Ammonium Sulphate - - 50 



CHAPTER IX. 



PRODUCTS OF HYDROLYSIS OF VEGETABLE PROTEINS - - 53 



(a) Hydrolysis by Acids _-_.. -53 



() Hydrolysis by Alkalies - -55 



(c) Colour Reactions - - 55 



(d) Nitrogen in Vegetable Proteins - - - 56 



(e) Sulphur in Vegetable Proteins - 64 



CHAPTER X. 



CLASSIFICATION OF VEGETABLE PROTEINS - - 72 



General Discussion - - * * - - 72 



Enumeration of the Groups of Proteins - 72 



I. Simple Proteins - "73 



(a) Albumins - - 73 



(b) Globulins - 74 



(f) Glutelins - 79 



(d) Prolamins - 80 



(e) Albuminoids - 81 

 (/) Histones - 81 



(g) Protamines - - ;>' - 81 



