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Orientational structure formation of silk fibroin with anisotropic properties in solutions; Orientastionnoe strukturoobrazovanie fibroina shelka s anizotropnymi svojstvami v rastvorakh

Thesis/Dissertation:

Abstract

Key words:silk fibroin, dissolution, solution's model systems, gelation, orientational crystallization, optical polarization, longitudinal stream, {alpha} - {beta} transition, structure formation, phase transformations, relaxation, anisotropy of swelling and desorption, thermo- and biodegradation. Subjects of the inquiry: silk fibroin is the main subject of investigation. Fibroin's solutions were obtained on the base of water and organic solvents, containing salts. Comparative investigations were carried out by using biosolution - secretion of silkworm, solutions of silk sericin, cotton cellulose, methylcellulose, polystyrene and (co) polycrylonitrile. Aim of the inquiry: the elucidation of the regularities of silk fibroin anisotropic structures formation in the direct generation of orientational ordering in solutions taking into account of influences of its the molecular structures, configuration information, {alpha} - {beta} conformational transformations, and development jointly using polarization-optical and hydrodynamic methods to control of structure formation. And also definition of possibility fields for use biopolymers anisotropic structure formation principles. Method of inquiry: birefringence, dispersion optical rotation, circular dichroism, polarization- ultramicroscope, ultracentrifuge, viscosimetry, potentiometry, differential thermal analysis, chromatography, x-ray analysis, spectroscopy. The results achieved and their novelty: the physical regularity amorphous-crystalline fibroin dissolutions in salt-containing solvents based on chains melting, distribution and redistribution were recognized; fibroin statistical parameters, molecular-mass and conformational characteristics were  More>>
Authors:
Kholmuminov, A A [1] 
  1. AS RU, Institute of Polymer Chemistry and Physics, Tashkent (Uzbekistan)
Publication Date:
Jun 15, 2008
Product Type:
Thesis/Dissertation
Report Number:
INIS-UZ-164
Resource Relation:
Other Information: TH: Thesis (Doct. nauk); 6 refs., 11 figs., 3 tabs
Subject:
36 MATERIALS SCIENCE; ANISOTROPY; BIODEGRADATION; BIREFRINGENCE; CHROMATOGRAPHY; COTTON; CRYSTALLIZATION; DIFFERENTIAL THERMAL ANALYSIS; DISSOLUTION; ORGANIC SOLVENTS; PARTICLE DECAY; PHASE DIAGRAMS; POLARIZATION; POLYSTYRENE; SILKWORM; ULTRACENTRIFUGES; X RADIATION
OSTI ID:
21282215
Research Organizations:
AN RU, Tashkent (Uzbekistan). Institut khimii i fiziki polimerov
Country of Origin:
Uzbekistan
Language:
Russian
Other Identifying Numbers:
TRN: UZ1004729028100
Availability:
Available from INIS in electronic form
Submitting Site:
INIS
Size:
44 pages
Announcement Date:
Apr 14, 2010

Thesis/Dissertation:

Citation Formats

Kholmuminov, A A. Orientational structure formation of silk fibroin with anisotropic properties in solutions; Orientastionnoe strukturoobrazovanie fibroina shelka s anizotropnymi svojstvami v rastvorakh. Uzbekistan: N. p., 2008. Web.
Kholmuminov, A A. Orientational structure formation of silk fibroin with anisotropic properties in solutions; Orientastionnoe strukturoobrazovanie fibroina shelka s anizotropnymi svojstvami v rastvorakh. Uzbekistan.
Kholmuminov, A A. 2008. "Orientational structure formation of silk fibroin with anisotropic properties in solutions; Orientastionnoe strukturoobrazovanie fibroina shelka s anizotropnymi svojstvami v rastvorakh." Uzbekistan.
@misc{etde_21282215,
title = {Orientational structure formation of silk fibroin with anisotropic properties in solutions; Orientastionnoe strukturoobrazovanie fibroina shelka s anizotropnymi svojstvami v rastvorakh}
author = {Kholmuminov, A A}
abstractNote = {Key words:silk fibroin, dissolution, solution's model systems, gelation, orientational crystallization, optical polarization, longitudinal stream, {alpha} - {beta} transition, structure formation, phase transformations, relaxation, anisotropy of swelling and desorption, thermo- and biodegradation. Subjects of the inquiry: silk fibroin is the main subject of investigation. Fibroin's solutions were obtained on the base of water and organic solvents, containing salts. Comparative investigations were carried out by using biosolution - secretion of silkworm, solutions of silk sericin, cotton cellulose, methylcellulose, polystyrene and (co) polycrylonitrile. Aim of the inquiry: the elucidation of the regularities of silk fibroin anisotropic structures formation in the direct generation of orientational ordering in solutions taking into account of influences of its the molecular structures, configuration information, {alpha} - {beta} conformational transformations, and development jointly using polarization-optical and hydrodynamic methods to control of structure formation. And also definition of possibility fields for use biopolymers anisotropic structure formation principles. Method of inquiry: birefringence, dispersion optical rotation, circular dichroism, polarization- ultramicroscope, ultracentrifuge, viscosimetry, potentiometry, differential thermal analysis, chromatography, x-ray analysis, spectroscopy. The results achieved and their novelty: the physical regularity amorphous-crystalline fibroin dissolutions in salt-containing solvents based on chains melting, distribution and redistribution were recognized; fibroin statistical parameters, molecular-mass and conformational characteristics were established; It was shown that fibroin molecules turned into fully uncoiled and oriented state with the breakdown decay of {alpha}-spiral chain sections by I type phase transition mechanism, but in oriented state with {alpha}-spiral conservation by II type transition; the presence of longitudinal field on the boundary 'reservoir - withdrawing capillary' of gland, initiating the transition of {alpha}-spiral in {beta}-structures as well as phase separation of fibroin and sericin in stream were discovered; the phase diagram of liquidus for secret in the framework of polymers orientation crystallization conception were suggested; the mechanism of fibroin orientational crystallization under the longitudinal flow of solutions and gels was conformed experimentally; the scientific principles of oriented-crystallized fibrillar biopolymer materials receipt were established on the base of fibroin model solutions with properties of anisotropy of moisture absorption, swelling, desorption, thermo- and biodegradation; the approach of jointly using polarization-optical and hydrodynamic methods to the investigation of fibrillar biopolymers structure formation and phase transformations in solution was developed. Practical value - the elucidated physical regularities of fibroin solution allow to formulate a new idea on fibrillar biopolymer solutions formation and to get on their late model systems for practical use; the established scientific principles of orientational structure-formation and phase transformation of fibroin will be the base for development of original methods of anisotropic biopolymer materials from solutions of the polarization-optical and developed hydrodynamic methods can be used for the investigation of structure and phase transformations of wide range of fibrillar biopolymer samples. Sphere of usage: physics of anisotropic polymer systems, macromolecular compounds solutions, gels, crystals, biopolymers materials science, optical polarization and hydrodynamics. (author)}
place = {Uzbekistan}
year = {2008}
month = {Jun}
}