𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Flexibility of collagen determined from dilute solution viscoelastic measurements

✍ Scribed by F. Henry M. Nestler; Søren Hvidt; John D. Ferry; Arthur Veis

Publisher
Wiley (John Wiley & Sons)
Year
1983
Tongue
English
Weight
650 KB
Volume
22
Category
Article
ISSN
0006-3525

No coin nor oath required. For personal study only.

✦ Synopsis

The frequency dependences of the storage and loss shear moduli, G' and G", of pronasetreated collagen dissolved in acetate buffer at pH 4.0 were measured at 17.0"C by use of the Birnboim-Schrag multiple lumped resonator apparatus. Some of the solutions contained 70% glycerol. The infinite-dilution moduli were determined and compared with theoretical models for a rigid cylinder and a semiflexible rod. Only the latter could fit the data. A rotational time of 144 ps and a slowest flexural relaxation time of 21 p s , both reduced to water at 20°C, were determined from the fit. The intrinsic viscosity and rotational relaxation time correspond to a semiflexible rod with persistence length of about 170 nm and a Young's modulus of 4 X 1O'O dyn/cm2.

📜 SIMILAR VOLUMES

Determination of the diffusivity in elas
Determination of the diffusivity in elastomer solutions by batch sorption studies from a dilute liquid phase
✍ Gerard van Zee; Jan De Graauw 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 174 KB 👁 2 views

A simple batch sorption method is examined for diffusivity determinations of binary solutions of low molecular weight organic compounds in amorphous polymers. The method is based on solute uptake from a stirred liquid solution by a polymer sheet sample submerged in the liquid solution and measuremen

Estimation of the compatibility of poly(
Estimation of the compatibility of poly(2,6-dimethyl-1,4-phenylene oxide) and poly(fluorostyrene-co-bromostyrene) from dilute solution viscosity measurements
✍ M. Opalički; H.J. Mencer 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 213 KB

The viscosity behaviour of dilute benzene solutions of poly(fluorostyrene-co-bromostyrene) (A) and poly(2,6-dimethyl-1,4-phenylene oxide) (B) and of their mixtures has been studied at 25 °. The viscosity interaction coefficients, kAs, have been calculated from the Huggins slope coefficients of polym