12 



CONSTITUENTS OF MILK 



Table II 

 CASEINOGEN HYDROLYSIS PRODUCTS 



1 



Products of Hydrolysis. 



Cow's Milk. 



(Abderhalden, Fischer, 



Osborne and Greed, 



Morner, Fischer and 



Abderhalden, Hart.) 



Goat's Milk. 



(Abderhalden 



and 

 Schittenhelm.) 



Human Milk. 



(Abderhalden 



and 

 Schittenhelm.) 



Glycine 



Alanine 



Valine 



Leucine 



Phenylalanine. . . . 



Tyrosine 



Serine 



Cystine 



Proline 



Oxyproline 



Aspartic acid .... 

 Glutamic acid. . . . 



Tryptophane 



Arganine 



Lysine 



Histidine 



Diaminotrioxy- 



dodecanic acid . 

 Aminovaleric acid 

 Ammonia 







0.90 



1.00 



10.50 

 3.20 

 4.50 

 0.45 

 0.06 

 6.70 

 1.50 

 1.20 



11.00 

 1.50 

 4.84 

 5.80 

 2.59 



0.75 

 7.20 

 1.60 





 1.50 



7.40 

 2.75 

 4.95 



4.60 



1.20 

 12.00 



4.71 



and milk serum, as determined in the usual way by direct titra- 

 tion with alkali, may be entirely fallacious because of the errors 

 introduced by titrating phosphoric acid in the presence of lime 

 salts. Cameron and Hurst ^^ have shown that the following 

 reactions may occur. 



(1) CaHP04 +2H2O =Ca(OH)2+H3P04. 



(2) 2CaHP04+Ca(OH)2 = Ca3P2()8 +2H2O. 



These result in the presence of free phosphoric acid in place 

 of neutral dicalcium phosphate and the acidity is, therefore, 



