TY - JOUR

T1 - Hydrodynamic characteristics and equilibrium rigidity of pullulan molecules

AU - Pavlov, Georges M.

AU - Korneeva, Evguenija V.

AU - Yevlampieva, Natalia P.

PY - 1994/1/1

Y1 - 1994/1/1

N2 - The hydrodynamic characteristics of the polysaccharide pullulan (polymaltotriose) in water have been investigated and its molecular characteristics have been determined. Experimental values varied over the following ranges: velocity sedimentation coefficient (S): 0.9 < S < 11.2, translational diffusion coefficient (107 cm2 s-1): 1.1 < D < 14.7 and intrinsic viscosity (cm3 g-1): 6.7 < [η] < 164, which corresponds to a change in molecular weight (× 103) in the range 3.9 < MSD < 644. On the basis of analysis of the literature and our experimental data, excluded volume effects have been shown to have a prevailing influence on the chain length of these polysaccharides. The equilibrium rigidity and hydrodynamic chain diameter of pullulan were evaluated on the basis of the theory of hydrodynamic properties of a wormlike necklace, taking into account excluded volume effects. At low M (< 30 × 103) the translation friction data (in contrast to viscometric data) cannot be described in the framework of the theory of linear molecules. © 1994.

AB - The hydrodynamic characteristics of the polysaccharide pullulan (polymaltotriose) in water have been investigated and its molecular characteristics have been determined. Experimental values varied over the following ranges: velocity sedimentation coefficient (S): 0.9 < S < 11.2, translational diffusion coefficient (107 cm2 s-1): 1.1 < D < 14.7 and intrinsic viscosity (cm3 g-1): 6.7 < [η] < 164, which corresponds to a change in molecular weight (× 103) in the range 3.9 < MSD < 644. On the basis of analysis of the literature and our experimental data, excluded volume effects have been shown to have a prevailing influence on the chain length of these polysaccharides. The equilibrium rigidity and hydrodynamic chain diameter of pullulan were evaluated on the basis of the theory of hydrodynamic properties of a wormlike necklace, taking into account excluded volume effects. At low M (< 30 × 103) the translation friction data (in contrast to viscometric data) cannot be described in the framework of the theory of linear molecules. © 1994.

KW - equilibrium chain rigidity

KW - hydrodynamic properties

KW - pullulan

UR - http://www.scopus.com/inward/record.url?scp=0028568094&partnerID=8YFLogxK

U2 - 10.1016/0141-8130(94)90063-9

DO - 10.1016/0141-8130(94)90063-9

M3 - Article

C2 - 7727346

AN - SCOPUS:0028568094

VL - 16

SP - 318

EP - 323

JO - International Journal of Biological Macromolecules

JF - International Journal of Biological Macromolecules

SN - 0141-8130

IS - 6

ER -