COMPOSITION OF NATURAL FATS AND OILS 



193 



stearic, and oleic acids/^^ while Eckstein, ^^^ in 1925, proved the presence of 

 traces of lauric and myristic acids also, and of less than 1% of linoleic, 



Table 6 

 Typical Depot Fats (Weight per Cent) of Depot Fats of Higher Land Animals 



Saturated acids Unsaturated acids" 



Ci4 Ci6 LLno- 



Animal Cu Cie Cis -2H -2H Oleic leic C20 



Frog'' 4 11 3 — 15 52(2.5) 15(6) 



Lizanr 4 29 10 — 12 40(2.7) 5(5.5) 



Chickei/ 0.1 25.6 7.0 — 7.0 38.4 21.3 0.6(6.8) 



Rat" 



Low-fat diet 3.1 26.7 0.4 0.9 15.6 47.2 2.2 0.3(8) 



5% fat diet 1.8 24.4 4.4 0.3 4.8 44.3 18.6 1.4(8) 



High corn oil diet 0.7 12.2 2.9 — 6.9 44.8 32.3 — 



High coconut oil diet... 44.5^ 19.9 4.0 2.0" 4.4 23.8 1.4 — 

 Pig (back fat) 



Low-fat diet'' 0.8 25.9 12.2 0.2 2.0 48.1 7.8 :}.0(8) 



Low-fat diet' alone .... 1.7 25 . 5 13 . 7 — — 50 . 2 8.9 — 



-1-4% cottonseed oil. 1.1 25.0 21.1 — — 39.5 13.3 — 



-h8% cottonseed oil. 1.1 13.8 26.5 — — 31.8 26.8 — 



Mutton tallow' 4.6 24.6 30.5 — — 36.0 4.3 — 



Goat* 3.5 25.5 28.1 — — 38.4 — 2.4(8) 



Beef tallow' 3.3 24.9 24.1 0.4 2.4 41.8 1.8 0.5(8) 



Horse 



Abdominal'" — 28 5 — — 50 13" — 



Body" _ 29 7 — — 55 7" — 



Reindeer loin' 7 35 20'' — — 37 — — 



Camel hump' — 37 16 — — 47 — — 



" Figures in parentheses represent unsaturation in hydrogen atoms. 



'' E. Klenk, Z. physiol. Chem., 221, 259-263, 264-270 (1933). 



' T. P. Hilditch and H. Paul, Biochem. J., 31, 227-228 (1935). 



•^ T. P. Hilditch, E. C. Jones, and A. J. Rhead, Biochem. J., 28, 786-795 (1934). 



<• H. E. Longenecker, /. Biol. Chem., 128, 645-658 (1939); 129, 13-22 (1939); 130, 

 167-177 (1939). 



^ Including 27.2% C12 acid. 



Including 0.6% Cu unsaturated acid. 



'' T. P. Hilditch, C. H. Lea, and W. H. Pedelty, Biochem. J., 33, 493-504 (1939). 



'■ N. R. Ellis, C. S. Rothwell, and W. O. Pool, J. Biol. Chem., 92, 385-398 (1931). 



' G. Collin, T. P. Hilditch, and C. H. Lea, ./. Soc. Chem. Ind., 48, 46-50T (1929). 



*= D. R. Dhingra and D. N. Sharma, J. Soc. Chem. Ind., 57, 369-370T (1938). 



' T. P. Hilditch and H. E. Longenecker, Biochem.. J., 31, 1805-1819 (1937). 



'" H. A. Schuette, T. M. Garvin, and E. J. Schwoegler, J. Biol. Chem., 107, 635-639 

 (1934). 



" A. Heiduschka and A. Steinruck, J. prakt. Chem., 102, 241-266 (1921). 



" 4% of linolenic acid in addition. 



'' 2% of linolenic acid in addition. 



"^ W. F. Baughman, G. S. Jamieson, and R. S. McKinney, Oil & Fat Industries, 6, 

 11-12 (1929). 



''1% C20 saturated acid in addition. 



' E. F. Armstrong and J. Allan, ./. ,SV. Chem. hid., .',3, 207-218T (1924). 



"6 J. Jaeckle, Z. phi/siol. Chem., 36, 53-84 (1902). 



'" H. C. Eckstein, ./. Biol. Chem., 64, 797-806 (1925). 



