FIG. 7.
The viscosity of the smooth GXM solution decreased more rapidly than the mucoid GXM solution in the presence of salt. (A and B) The relative viscosity increment was determined for various concentrations of GXM from the smooth (A) or mucoid (B) variants. GXM was dissolved in NaCl solutions of different ionic strengths. Ionic strength is listed to the right of the linear regression line for each concentration series. (C and D) Comparison of the relative viscosity increment for GXM from the smooth (solid bars) and mucoid (gray hatched bars) variants at densities of 5 × 10−5 g/cm3 (C) or 2 × 10−4 g/cm3 (D). The accurate reproducibility of sample flow times results in minimal standard error for ηi, which is not visible when plotted.