SECTION I 



Dietary Constituents and Their 

 Derivatives 



The Proteins and Their Metabolism A. I. Ringer 



Introduction Elementary Composition of Proteins Classification of the Pro- 

 teinsThe Structure of the Protein Molecule Amino Acids or "Build- 

 ing Stones of Protein"' The Role of Amino Acids in the Structure of 

 the Protein Molecule The Amino Acid Content of Different Proteins 

 Reactions of protein Color Reaction The Biuret Reaction The 

 Xantho Proteic Reaction The Million's Reaction The Sulphur-lead 

 Reaction The Molisch Reaction The Adamkiewicz-Hopkins-Cole Reac- 

 tion The Triketohydrinden Hydrat Reaction Precipitating Reactions 

 of Proteins The "Salting Out" of Proteins by Means of Electrolytes 

 Coagulation and Denaturalization of Proteins The Salt Formation of 

 Proteins The Digestion of the Protein The Absorption of Products 

 of Protein Digestion from the Gastro-intestinal Canal The Fate of 

 Absorbed Amino Acids in the Blood The Fate of Amino Acids in the 

 Tissues: Urea Formation The Fate of the \on-nitrogerious Fraction 

 of the Amino Acids Protein Metabolism The Question of Optimum 

 Versus Minimum Protein Diet The Function of Protein in the Diet 

 Incomplete Proteins The Influence of Protein on Metabolism The 

 Specific Dynamic Action of Protein. 



