XXXIV CONTENTS 



XIII. The Physiology and Biochemistry of the Essential Fatty Acids 



(continued 



8. Distribution of Essential Fatty Acids 827 



(1) Distribution in Foods 827 



a. Introduction 827 



b. Presence in Vegetable Fats 828 



c. Presence in Animal Fats 828 



d. Presence in Hydrogenated Fats 830 



e. Presence in Butters and Milk Fats 832 



(2) Distribution in Animal Tissues 832 



9. Conclusions 833 



XIV. The Nutritional Value of Fats 835 



1 . Introduction 835 



2. Fats as Essential Dietary Components 838 



(1 ) The Effect of Dietary Fat upon Growth 838 



a. Experiments in Which ad libitum Feeding Was Employed .... 838 



(a) Experiments on Rats Maintained on Restricted Calories. . 838 



(b) Experiments in Which Paired Feeding Tests Were Em- 



ployed 841 



b. Associative Dynamic Action 842 



(2) The Effect of Dietary Fat upon the Time of Sexual Maturity 845 



(3) The Effect of Dietary Fat upon Pregnancy and Lactation 846 



(4) The Effect of Dietary Fat upon Work Capacity 849 



(5) The Effect of Dietary Fat upon Survival Time during Subsequent 



Fasting 851 



(6) The Effect of Dietarj'- Fat upon Longevity 853 



(7) The Effect of Dietary Fat upon Nitrogen Retention 855 



(8) The Effect of Dietary Fat in Stress Conditions 857 



a. Thyrotoxicosis 857 



b. X-Irradiation 860 



c. Cold Stress 860 



d. Hepatectomy 860 



e. Alloxan Diabetes 861 



f . Thiamine Deficiency 864 



g. Bacterial Action 865 



h. Miscellaneous Stress Factors 874 



(9) The Effect of Dietary Fat upon Galactose Absorption 875 



(10) The Effect of Dietary Fat upon Calcium Utilization 877 



(11) The Effect of Dietary Fat upon Vitamin Requirements 878 



a. Thiamine and Fat 878 



b. Riboflavin and Fat 880 



c. Pantothenic Acid and Fat 881 



d. Pyridoxine (Vitamin Be) and Fat 881 



e. Niacin, Folic Acid, Biotin, Vitamin B12, and Fat 884 



f. Fat-Soluble Vitamins 885 



