782 



VII. LIPID DISTRIBUTION IN SPECIFIC TISSUES 



Less water was lost under these conditions by obese dogs than by lean 

 animals. 



(2) Lipids Present in the Hair and Other Appendages 



Eckstein 422 reported that the hair of young adult albino rats contained 

 4.5% of total lipids; cholesterol constituted 12% and phospholipids 

 (lecithin) only 0.8% of the total lipids. These values are in line with those 

 obtained by Koppenhoefer 403 for the hair layer of steer skin. Eckstein 422 

 found that 80% of the cholesterol was present as the free alcohol, and only 

 20% occurred as the ester. Table 21 summarizes the total lipid and chole- 

 sterol content of hair from several animals, of wool and of feathers. 



Table 21 

 The Lipid Components (in per Cent Dry Weight) in Hair, Feathers, and Wool 



» H. C. Eckstein, J. Biol. Chem., 73, 363-369 (1927). 

 6 Values for 13 children only are included in this average. 

 e M. Kawaguchi, Nagoya J. Med. Sci., 10, 348-349 (1937); Chem. Abst. 

 (1937). 



d R. Salgues, Compt. rend. soc. biol., 1U, 923-925 (1937). 



31, 7093 



Cholesterol has been found to be higher in the feathers of young birds, 423 

 as well as in the fur of young rabbits, 424 than in adult animals; moreover, 



422 H. C. Eckstein, Proc. Soc. Exptl. Biol. Med., 23, 581 (1926). 



423 R. Salgues, Compt. rend. soc. biol., 124, 923-925 (1937). 



424 M. Kawaguchi, Nagoya J. Med. Sci., 10, 348-349 (1937); Chem. Abst., 31, 7099 

 (1937). 



