title: Effects of the addition of hyaluronate segments with different chain lengths on the viscoelasticity of hyaluronic acid solutions.
abstract: The effects of the addition of sodium hyaluronate segments (sHA) with different chain lengths on the viscoelasticity of high molecular weight sodium hyaluronate (HA) aqueous solutions were studied. The additive effects of sHA depended on the chain length of sHA. Shorter sHA decreased storage (G') and loss (G") moduli, whereas longer sHA increased both moduli. In physiological saline, the effects of the addition of sHA depended on the chain length of sHA, as in aqueous solutions, except that shorter segments did not decrease both moduli. The effects of the addition of monosaccharides, i.e., N-acetyl glucosamine (GlcNAc) and sodium glucuronate (GlcANa), were also studied. Although GlcNAc increased G' and G", GlcANa decreased both moduli. A shift factor "A," which depended on chain-length effects, a sugar effect, and a salt effect, was developed to explain these additive effects quantitatively.
authors.affiliation: Research Center, Denki Kagaku Kogyo Co., Ltd., Tokyo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Fujii
authors.forename: M
authors.initials: M
authors.lastname: Kawata
authors.forename: Y
authors.initials: Y
authors.lastname: Kobayashi
authors.forename: A
authors.initials: A
authors.lastname: Okamoto
authors.forename: K
authors.initials: K
authors.lastname: Nishinari
mesh_terms: D002240:Carbohydrate Sequence; D004548:Elasticity; D006820:Hyaluronic Acid / Q000737:chemistry*; D008969:Molecular Sequence Data; D008970:Molecular Weight; D012996:Solutions; D014783:Viscosity
chemical_list: D012996:Solutions; D006820:Hyaluronic Acid