xii CONTENTS 



III. The Digestibility of Fats (continued) 



5. Pathologic Factors Altering the Digestibility of Fats 240 



(1 ) Methods for the Recognition of Defective Fat Absorption 240 



a. By Chemical Estimation of Fecal Fat 240 



b. By the Use of the Fat Balance 241 



c By the Use of Labeled Fats 241 



(2) General Changes Occurring in Defective Fat Absorption 242 



(3) Steatorrhea Related to Deficiency of Pancreatic Juice 243 



(4) Steatorrhea Related to Deficiency of Bile 244 



(5) Non-tropical Sprue 245 



(6) ( Jongenital Steatorrhea 246 



IV. The Digestion, Absorption, and Digestibility of Lipids Other than 



Fats 247 



1 . Introduction 247 



2. The Digestion and Absorption of Phospholipids 247 



3. The Absorption and Digestibility of Waxes 250 



(1 ) Waxes Containing Aliphatic Alcohols 250 



a. Jojoba Oil 251 



b. Cetyl Palmitate 251 



c Distearyl Citrate 253 



(2) Waxes ( Containing Cyclic Alcohols 254 



4. The Absorption and Digestibility of Higher Aliphatic Alcohols 255 



(1) Cetyl Alcohol 255 



(2) Stearyl Alcohol 257 



(3) Oleyl Alcohol 258 



(4) Other Alcohols 258 



5. The Digestion, Absorption, and Transformations of Sterols in the Gas- 



trointestinal Tract 259 



(1) The Digestion and Absorption of Cholesterol 259 



a. Absorption Experiments with Cholesterol 259 



(a) The Effect of Fat on ( Iholesterol Absorption 260 



(b) The Effect of Bile on Cholesterol Absorption 260 



(c) The Esterification of Cholesterol in Relation to Its Absorp- 

 tion 201 



(d) Other Factors Concerned with the Absorption of Cholesterol 264 



b. The Effect of Cholesterol on the Absorption of Fatty Acids 264 



c. Balance Experiments with Cholesterol 265 



(a,) Balance Experiments in Man 266 



(b) Balance Experiments on Animals 267 



(2) The Digestion and Absorption of Sterols Other Than Cholesterol . . . 268 



(3) The Effect of Tlant Sterols on the Absorption of Cholesterol 270 



(4) Changes in Sterols in the Gastrointestinal Tract 271 



(5) The Transport of Cholesterol from the Gut 274 



6. The Digestion and Absorption of Hydrocarbons 275 



(1) Paraffins ". 275 



(2) Unsaturated Hydrocarbons 278 



(3) Carcinogenic and Related Non-carcinogenic Hydrocarbons 279 



