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. Author manuscript; available in PMC: 2011 Apr 14.
Published in final edited form as: Appl Spectrosc. 2008 May;62(5):503–511. doi: 10.1366/000370208784344370

Table 1.

Intrinsic viscosity [η], overlap concentration (c*), entanglement concentration (ce), and the Huggins constant (k′) were calculated from viscosity measurements of high and low MW HA in a salt solution. The overlap and entanglement concentrations were calculated from a log-log plot of specific viscosity versus HA concentration. These data show that the HA used in this study has rheological properties consistent with other studies of bacterial source HA.

High MW HA (1.387 ×106 Da) Low MW HA (2.344 ×105 Da)
Parameter 0.1 M NaCl 0.2 M NaCl 0.1 M NaCl 0.2 M NaCl
[η] (ml/mg) 2.5 2.03 0.39 0.35
c* (mg/ml) 0.76 0.74 N/A N/A
c*[η] 1.9 1.5 N/A N/A
k′ 0.44 0.59 0.44 0.62
ce (mg/ml) 1.9 2.8 N/A N/A