Isolation and Study of the Physicochemical Properties of Galactomannans from Plant Materials

— The aim of the study is isolation of galactomannan from plant materials and investigation of their physical and chemical properties. Polysaccharides generally consisting of galactomannan were isolated and purified from galactomannans from the seeds of the plants Sophora japonica and Gleditsia tria...

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Published in:Russian journal of bioorganic chemistry 2020-12, Vol.46 (7), p.1317-1322
Main Authors: Azimova, L. B., Normakhamatov, N. S., Khaytmetova, S. B., Mukhitdinov, B. I., Amonova, D. M., Filatova, A. V., Khalilova, G. A., Kirgizbaev, H. H., Turaev, A. S.
Format: Article
Language:English
Subjects:
Biochemistry
Biomedical and Life Sciences
Biomedical materials
Biomedicine
Bioorganic Chemistry
Chemical properties
Extraction
Galactose
Galactosides
Hydrolysis
Life Sciences
Mannose
Monosaccharides
NMR spectroscopy
Organic Chemistry
Plant Biopolymers
Polysaccharides
Seeds
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Summary:— The aim of the study is isolation of galactomannan from plant materials and investigation of their physical and chemical properties. Polysaccharides generally consisting of galactomannan were isolated and purified from galactomannans from the seeds of the plants Sophora japonica and Gleditsia triacanthos by cold and hot extraction methods. Galactose and mannose contents of the galactomannans isolated were quantitatively characterized and physical and chemical properties of the polysaccharides were studied. In addition, polysaccharides isolated were enzymatic hydrolyzed and changes in the monosaccharide composition in the hydrolysis process were studied. The characteristic viscosities of the initial and hydrolyzed galactomannans were 4.85–3.80 dL/g, respectively. Molecular weights of the galactomannans, after treatment with the enzyme, changed in a range of 55 600–26 200 Da. Studies with 1 H and 13 C NMR spectroscopy methods showed decreases in galactoside content of the hydrolyzed galactomannans, indicating the primary course of hydrolysis occurs by the side chain of the macromolecule. Increase in duration of enzymatic hydrolysis more than 24 h led to the formation of poly-mannans with a minor content of galactose units. The data can serve to improve isolation and preparation of galactomannan based materials for biomedical purposes.
ISSN:1068-1620
1608-330X
DOI:10.1134/S106816202007002X