Fig. 4 Determination of the intrinsic viscosity values [η] (which are the intercepts, at c = 0, of the plots of ηsp/c (solid lines, Huggins plot) and ln ηr/c [dashed lines, Kramer plot] vs. c) for α-CD (1), β-CD (2), and γ-CD (3) in DMSO. The Huggins parameter k H are 0.39, 0.22, and 0, and the Kramer parameter k K are −0.11, −0.24, and −0.40 for α-, β-, and γ-CD, respectively