76 II. FUNDAMENTAL STRUCTURE OF PROTOPLASM 



from the polymerization of the protein molecules. Rothen (65) studied 

 the influence of a-particles on the antigenic property of bovine albumin 

 and found that the albumin monolayer, when subjected to bombard- 

 ment of ct-particles from a polonium source, com.pletely lost in less 

 than 30 minutes its property of combining with homologous antibody, 

 while with a double layer 45 minutes were needed, and with three 

 double layers or six monolayers even 135 minutes were not sufficient 

 to inactivate the property. 



