Results 251 to 260 of about 1,359,714 (335)

Intrinsic viscosity of ovomucoid in random coil conformation.

International journal of peptide & protein research, 2009
Ovomucoid is denatured by concentrated solutions of guanidine hydrochloride. The intrinsic viscosities of the glycoprotein in 6 M guanidine hydrochloride in the absence and presence of beta-mercaptoethanol were found to be 8.1 and 16.0 ml/g, respectively.
F. Ahmad, Abu Nayeem Mohammad Salahuddin
semanticscholar   +1 more source

INTRINSIC VISCOSITY OF COPOLYMERS

British Polymer Journal, 1969
AbstractThe intrinsic viscosity of a copolymer has been calculated using the method developed by Fixman. The result shows that the relation [η] = KM1/2 may be observed under certain conditions (where [η] is intrinsic viscosity, M is molecular weight, and K is a constant).
openaire   +1 more source

Intrinsic Viscosity of Polyelectrolytes

The Journal of Chemical Physics, 1969
The intrinsic viscosity and expansion factor of polyelectrolyte have been calculated by using the Debye–Hückel approximation to the potential of mean force between segments. The results obtained are compared with experiments by Takahashi and Nagasawa.
openaire   +1 more source

Intrinsic Viscosity of Wormlike Polymer Chains

The Journal of Chemical Physics, 1968
The intrinsic viscosity of wormlike polymer chains has been calculated using the Kirkwood–Riseman method. The chain statistics are taken from the Hermans and Ullman analysis of the Kratky–Porod model. Results are obtained for several degrees of chain extension for chains of varying molecular weight as a function of the degree of hydrodynamic ...
openaire   +2 more sources

Polymer Dynamics: Non-Newtonian Intrinsic Viscosity

The Journal of Chemical Physics, 1966
The operator techniques developed in the preceding paper are here applied to the determination of the intrinsic viscosity as a function of excluded volume and shear rate. The force constants which represent the excluded-volume interaction are determined, at nonvanishing shear rate, by a criterion of self-consistency. Numerical results are given for the
openaire   +2 more sources

Intrinsic Viscosity of Polymer Chains

The Journal of Chemical Physics, 1965
The intrinsic viscosity [η] of polymer chains is recalculated by methods similar to those of Kirkwood and Zimm. The theory is based on the preceding paper by Fixman, with the adoption of a smoothed excluded-volume potential and the following first-order approximation to the operator L which determines the segment coordinate distribution function ψ; for
Chong Wha Pyun, Marshall Fixman
openaire   +1 more source

Intrinsic viscosities of cellulose derivatives

Journal of Polymer Science, 1958
AbstractIntrinsic viscosities of cellulose acetates of degrees of substitution 2.86 and 3.00 and of cellulose trinitrate have been investigated as functions of temperature, solvent, and molecular weight. Large negative temperature coefficients (ca. −0.6% per degree) of [η] appear to be characteristic of cellulosic chains. These observed decreases in [η]
P. J. Flory, O. K. Spurr, D. K. Carpenter   +2 more
openaire   +1 more source

Parameters Affecting the Intrinsic Viscosity

2004
The concentration is not a true parameter affecting the intrinsic viscosity since the intrinsic viscosity is defined in ideal dilution (c→0) according to Eq. (4.7). Nevertheless, the influence of the concentration on the reduced viscosity ηred is of great importance for the determination of the intrinsic viscosity.
Werner-Michael Kulicke, Christian Clasen
openaire   +1 more source

Intrinsic Viscosity of Coiling Macromolecules

The Journal of Chemical Physics, 1964
The intrinsic viscosity of coiling molecules has been calculated using the Kirkwood—Riseman adaptation of the Oseen approximation. Four different models of chain segment distribution were treated: (a) a Gaussian coil, (b) an excluded volume model of Kurata and Yamakawa, (c) a coil expansion model suggested by Peterlin and (d) an excluded volume model ...
openaire   +1 more source

Intrinsic viscosity of binary gum mixtures with xanthan gum and guar gum: Effect of NaCl, sucrose, and pH.

International Journal of Biological Macromolecules, 2018
J. Bak, B. Yoo
semanticscholar   +1 more source