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Infinite‐dilution viscoelastic properties of tobacco mosaic virus
Author(s) -
Nemoto Norio,
Schrag John L.,
Ferry John D.,
Fulton Robert W.
Publication year - 1975
Publication title -
biopolymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 125
eISSN - 1097-0282
pISSN - 0006-3525
DOI - 10.1002/bip.1975.360140213
Subject(s) - chemistry , viscoelasticity , dilution , moduli , tobacco mosaic virus , aqueous solution , thermodynamics , rod , analytical chemistry (journal) , range (aeronautics) , viscosity , intrinsic viscosity , intermolecular force , molecule , chromatography , organic chemistry , composite material , materials science , polymer , physics , quantum mechanics , medicine , virus , alternative medicine , pathology , virology , biology
The storage and loss shear moduli, G ′ and G ″, have been measured for dilute solutions of unaggregated and aggregated tobacco mosaic virus samples in glycerol–water mixtures, by the Birnboim–Schrag multiple‐lumped resonator modified for use with aqueous solvents. The frequency range was 100–5800 Hz, the concentration range 0.6–2.1 × 10 −3 g/ml, and the temperatures 25.0° and 37.8°C. The number‐average and weight‐average molecular weights of the aggregated sample were estimated as 1.4 and 2.0 × 10 8 , respectively, from electron microscopy. The extrapolated intrinsic moduli [ G ′] and [ G ″] were compared with the predictions of the Kirkwood–Auer theory for rigid rodlike molecules. For the unaggregated sample, the frequency dependence of [ G ′] and [ G ″] agreed well with the theory assuming the intrinsic viscosity to be 27 ml/g, though the asymptotic limit of [ G ′] M / RT at higher frequencies was slightly larger than the theoretical value of 3/5. For the aggregated sample, the data agreed with theory for rigid rods as modified to account for molecular‐weight distribution.