CONTENTS 



CHAPTER I 



Paoe 



Introduction' 17 



The Chemistry and Physics of the Cell 17 



Chemistrj^ of the Essential Cell Constituents 18 



Proteins 19 



Fats and Lipoids (Lipins) 22 



Carbohydrates 23 



Inorganic Substances 24 



The Physical Chemistry of the Cell and Its Constituents 24 



Crystalloids and Their Properties 24 



Colloids 31 



The Structure of the Cell in Relation to Its Chemistry and Physics ... 39 



The Nucleus 40 



The Cytoplasm 42 



The Cell-wall 45 



CHAPTER II 



Enzymes 48 



The Nature of Enzymes and Their Actions 49 



The Principles of Enzyme Action 50 



The Toxicity of Enzymes 55 



Anti-enzymes 57 



The Intracellular Enzymes 62 



Oxidizing Enzymes 63 



Lipase 70 



Amylase or Diastase 73 



CHAPTER III 



Enzymes (Continued) .- • ■ 75 



Intracellular Proteases (Proteolytic Enzymes), Including a Considera- 

 tion of Autolysis 75 



Autolysis 76 



Relation of Autolysis to MetaboUsm 81 



Defense of the Cells Against Their Autolytic Enzymes 82 



Autolysis in Pathological Processes '. 85 



CHAPTER IV 



The Chemistry of Bacteria .\nd Their Products 101 



Structure and Physical Properties 101 



Chemical Composition 103 



Bacterial Enzymes 109 



Poisonous Bacterial Products 115 



Ptomains 116 



Toxins 120 



Endotoxins 124 



Poisonous Bacterial Proteins 125 



Bacterial Pigments 126 



11 



