STUDIES ON GUM JEOL ( LANNEA GRANDIS, SUPER ). PART V.  DEPENDENCE OF VISCOUS AND ELECTROCHEMICAL  PROPERTIES OF THE AQUEOUS SOLUTION. ON ITS CONCENTRATION

Variation of physical and electrochemical properties with concentration of gum solution has been studied. Curves showing such variations with concentration all show breaks, but the regions in which these breaks appear are not identical in all cases. Gum particles can be thrown out of solution by centrifuging at a moderate speed (4000-6000 r. p.m.). These particles also have the property of taking up hydrogen ions from HCl solution, and increase its P_H when added in increasing proportions.