226 



III. DIGESTIBILITY OF FATS 



Table 14 



Average Coefficients of Digestibility of Simple Triglycerides and Fatty Acids 



in Several Species of Animals 



Melting point, °C. 



Triglyceride or Pure Mixture 



fatty acid fed substance fed 



Trilaurin 49 



Trimyristin 56 



Tripalmitin 66 . 5 



Tristearin 70 



+ triolein (2:1) — 



+ triolein (1:2) — 



Laurie acid 44 



Myristic acid 53 



Palmitic acid 63 



Stearic acid . 



Coefficient of digestibility 



Guinea 

 pig 



Dog 



Oleic acid. . 

 Elaidic acid 



95 d 



10' 



82«« 



« A. L. S. Cheng, M. G. Morehouse, and H. J. Deuel, Jr., J. Nutrition, 37, 237-250 

 (1949). 



* R. Hoagland and G. G. Snider, ./. Nutrition, 26, 219-225 (1943). The fat mixture 

 consisted of 5% of simple triglyceride or fatty acid and 95% olive oil. 



c Reference b, but fat mixture consisted of 10% of simple triglyceride or fatty acid and 

 90% olive oil. 



d J. F. Lyman, J. Biol. Chem., 32, 7-11 (1917). 



* L. Arnschink, Z. Biol., 26 (n.s. 8), 434-451 (1890). 



' K. F. Mattil and J. W. Higgins. J. Nutrition, 29, 255-260 (1945). 



a Reference b, but fat mixture consisted of 25% fatty acid and 75% olive oil. 



h Reference b, but fat mixture consisted of 15% fatty acid and 85% olive oil. 



* H. Paul and C. M. McCay, Arch. Biochem., 1, 247-253 (1942). 



eride were 6.0 and 8.0 when it was dissolved in olive oil at a level of 5 

 and 10%, respectively. Although the results of Lyman 81 indicate a high 

 absorption for tripalmitin in the dog, Arnschink 82 found that practically 

 no tristearin could be utilized by this species (9-13.8%). 



"X F. Lyman, ./. Biol. Chem., 32, 7-11 (1917). 



»» L. Arnschink, Z. Biol., 26 (n.s. 8), 434-451 (1890). 



