On the influence of kinetic rigidity of macromolecules on the extinction angle and flow birefringence. Dumb-bell model

Assuming an irreversible, random, end-to-end aggregation of a small percentage of potato X virus in tobacco sap, the flow birefringence parameters of such polydisperse systems have been calculated. The extinction angles χ were evaluated for different values of the ratio G/θ1 (G gradient θ1, rotary diffusion constant of non-aggregated virus) for preparations containing between 0 and 15% by weight of aggregated material. A particle length of 6200 Å for the non-aggregated virus particle was derived and an amount of 13–15% aggregated material was estimated.A partially purified and fractionated preparation of potato X virus was also investigated and an average particle length of 5400 Å was derived. Because of the possible contribution of small fragments, this length was taken as the lower limit.The flow birefringence – gradient curve indicated that the potato X virus behaves like a rigid particle. No evidence of flexibility was obtained from extinction angle – gradient measurements in the range 0.1–0 M phosphate buffer concentrations at pH 7.2.

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The gradient dependence of the extinction angle in flow birefringence for the multisegment polymer chain model

Polymer Science U S S R ◽

10.1016/0032-3950(65)90088-2 ◽

1965 ◽

Vol 7 (3) ◽

pp. 492-497 ◽

Cited By ~ 1

Author(s):

Yu.Ya. Gotlib ◽

Yu.Ye. Svetlov

Keyword(s):

Polymer Chain ◽

Flow Birefringence ◽

Chain Model ◽

Extinction Angle

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Polymer Melt Rheology and Flow Birefringence

10.1007/978-3-642-68822-5 ◽

1983 ◽

Cited By ~ 244

Author(s):

Hermann Janeschitz-Kriegl

Keyword(s):

Polymer Melt ◽

Flow Birefringence ◽

Melt Rheology

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Quantum postulate vs. quantum nonlocality: on the role of the Planck constant in Bell’s argument

Foundations of Physics ◽

10.1007/s10701-021-00430-3 ◽

2021 ◽

Vol 51 (1) ◽

Author(s):

Andrei Khrennikov

Keyword(s):

Quantum Nonlocality ◽

Quantum Mechanical ◽

Quantum Foundations ◽

Planck Constant ◽

Variable Model ◽

Basic Principles ◽

Fundamental Feature ◽

Hidden Variable ◽

Bell Model

AbstractWe present a quantum mechanical (QM) analysis of Bell’s approach to quantum foundations based on his hidden-variable model. We claim and try to justify that the Bell model contradicts to the Heinsenberg’s uncertainty and Bohr’s complementarity principles. The aim of this note is to point to the physical seed of the aforementioned principles. This is the Bohr’s quantum postulate: the existence of indivisible quantum of action given by the Planck constant h. By contradicting these basic principles of QM, Bell’s model implies rejection of this postulate as well. Thus, this hidden-variable model contradicts not only the QM-formalism, but also the fundamental feature of the quantum world discovered by Planck.

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