44 PHYSIOLOGICAL AND PATHOLOGICAL CHEMISTRY. 



albumose. 1 The separation of these bodies will not be taken 

 up here. The first three of these albumoses are also called 

 primary albumoses in contradistinction to deuteroalbumose. 



(a) Conduct of Albumose on Heating. Heat a small por- 

 tion for three hours to 130 to 140, let cool, and treat with 

 water. The albumose now only partly dissolves in water. 

 Filter and wash. Warm the insoluble residue in a test-tube 

 with dilute soda solution: partial solution. Acidify the 

 filtered solution cautiously with hydrochloric acid: precipi- 

 tate. The albumose is reconverted by heating into a body 

 resembling albumin, presumably by the loss of water (R. 

 Hofmeister). 



(6) Dissolve 5 g. of the albumose by warming with 100 cc. 

 of water. The solution formed is turbid (dysalbumose and 

 residue of albumin). The filtered solution is used for the 

 following reactions:' 



Reactions of Albumose. 



1. Heat a small portion of the solution to boiling: it 

 remains unchanged (after transient cloudiness) even after 

 acidifying with acetic acid and adding a very few drops of 

 sodium chloride solution. 



2. Acidify with acetic acid and add some concentrated 

 sodium chloride solution: the solution becomes cloudy, but 

 clears up on heating. On cooling it again becomes cloudy. 



3. Add to a small portion of the solution a few drops of 

 nitric acid; a cloudiness or precipitate 2 soluble in an excess 

 of the nitric acid results. The solution becomes lemon-yellow 



1 According to the investigations of R. Hofmeister and his pupils these 

 substances are also in part not simple but mixtures. 



2 If the solution contains but little sodium chloride, the cloudiness 

 may not appear. Repeat the experiment, in this case adding some salt 

 solution before treating with the nitric acid. If the albumose is obtained 

 from the meat residue, this reaction only takes place after the addition 

 of sodium chloride. 



