Gel formation of solutions of fibrillar proteins during flow in a longitudinal field
A. A. KholmuminovInstitute of Polymer Chemistry and Physics, Uzbek Academy of Sciences, ul. Abdully Kadyri 7b, 100128, Tashkent, UzbekistanS. O. EshbekovaInstitute of Polymer Chemistry and Physics, Uzbek Academy of Sciences, ul. Abdully Kadyri 7b, 100128, Tashkent, UzbekistanA. Ya. MalkinTopchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninskii pr. 29, Moscow, 119991, Russia
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Аннотация
The effect of gel formation in the jets of salt-containing solutions of fibrillar proteins (silk fibroin and wool keratin) in a longitudinal hydrodynamic field modeling the process of natural-silk formation in silk glands is studied. Structural transformations in macromolecules are monitored via birefringence measurements, optical rotatory dispersion, and polarization ultramicroscopy. Gel formation under the action of a longitudinal rate gradient is accompanied by the α → β-conformation transition and by the attainment of high degrees of orientation.
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