Levans. II. Light‐scattering and sedimentation data of <i>Streptococcus salivarius</i> levan in water

Abstract

Abstract The molecular weights and radii of gyration of Streptococcus salivarius levan fractions were obtained from light‐scattering measurements in water. Sedimentation coefficients and partial specific volumes of the fractions were also obtained. Double logarithmic plots of [η] versus M̄ w and S 0 versus M̄ w yielded slopes having values of 0.17 and 0.62, respectively. The data and various calculated parameters show that levan from Streptococcus salivarius is highly branched and behaves hydrodynamically as a compact particle of spherical symmetry.