Abstract
This paper presents our studies of chemical and topological structure of lignin macromolecules isolated from herbaceous plants of various botanical origins. The elemental, monomeric, and functional composition of biopolymers by 13С-NMR spectroscopy, electron paramagnetic resonance, FTIR spectroscopy and Py-GC/MS spectrometry were determined. The antioxidant properties and determined structural-chemical correlations were evaluated. The results of a study of the topological structure of one of the most promising from a biomedical point of view sample of Rhodiola rosea lignin are presented. For the first time, it is proved that this lignin belongs to the class of star-shaped polymers. The geroprotective properties of Rhodiola rosea lignin were studied, and the fact of increasing lifespan of model animal Drosophila melanogaster flies was established. In the first time the effect of lignin from the stems of oats Avena sativa on the cognitive abilities of laboratory mice was studied. The obtained data indicate an improvement in the activity of the brain and central nervous system of model animals with regular preventive administration of lignin.
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