208 



SOLUTION AND PRECIPITATION OF PROTEINS 



Na2S04 is above m/64. In such solutions the rate of solution of 

 micella will be less and less, and since new micella are constantly 

 formed at 20°C., the viscosity will rise more rapidly on standing 

 when the solution contains Na2S04 in concentrations above m/64 

 than when the solution contains no or less Na2S04. 



Fig. 8 shows that CaClo in concentrations up to m/8 does not alter 



o 

 a 



2.7 



2.6 



2.5 



2.4 



2.3 



2.2 



2.1 



2.0 



1.9 



1. 



17 



1.6 



1.5 



] 



Influence of Ca.Cl2on 

 the rise in viscosity of 

 1% gelatin chloride 

 solution of pH 3.4 on 

 standing at 20° C 



5 10 15 20 25 30 35 40 45 50 55 60 



Time in minutes 



Fig. 8. Showing that concentrations of CaCU of m/2 or above prevent the 

 increase in viscosity of gelatin chloride solution of pH 3.4 on standing at 20°C. 



the increase in viscosity of gelatin chloride solution on standing but 

 that the viscosity of gelatin chloride of pH 3.4 does no longer increase 

 on standing when the concentration of CaCl2 is m/2 or 1 M. In this 

 concentration CaCl2 causes a slight increase in the rate of solution of 

 gelatin chloride. 



