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Article
Sulfation of Abies Ethanol Lignin by Complexes of Sulfur Trioxide with 1,4-Dioxane and Pyridine
An optimization of sulfation of abies ethanol lignin by complexes of sulfuric anhydride with pyridine and 1,4-dioxane has been performed. Conditions for the implementation of the sulfation of abies ethanol lig...
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Article
Synthesis and Study of Copper-Containing Polymers of Microcrystalline Cellulose Sulfates from Larch Wood
For the first time, the synthesis of water-soluble copper-containing microcrystalline cellulose sulfates (Сu-MCS) has been performed by the ion exchange method. The composition of the products has been studied...
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Article
Polyphenols of Wood Bark: Organic Precursors for the Production of Polymer Aerogels
A new method for preparation of organic aerogels by sol–gel polymerization of formaldehyde with polyphenols (PPs), isolated from larch bark and birch bark, was developed. The functional composition and propert...
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Article
Synthesis and Study of Copper-Containing Polymers Based on Sulfated Arabinogalactan
Synthesis of water-soluble copper-containing sulfates of arabinogalactan was carried out for the first time by the ion exchange method. Their composition and structure were studied by the methods of elemental ...
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Article
Sulfation of arabinogalactan by sulfamic acid in dioxane
The sulfation of arabinogalactan (AG) by sulfamic acid in the presence of urea in dioxane has been studied. The degree of AG sulfation increases as the sulfation temperature increases from 70 to 95°C. As indic...
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Article
Extraction of betulin from birch bark and study of its physico-chemical and pharmacological properties
Betulin-containing products were obtained in a yield of about 40% from absolutely dry birch bark. The content of betulin in the products was 74–75% or 85–89% depending on the presence of sodium or potassium hy...
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Article
Synthesis of the betulin dipropionate from the upper birch bark
A one-step synthesis of the betulin dipropionate directly from the birch bark without a separate stage of the betulin preparation is described in this paper. Extracts with different content of the betulin dipr...
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Article
Influence of mechanical treatment on the properties of betulin, betulin diacetate, and their mixture with water-soluble polymers
The influence of mechanical treatment on the properties of betulin, betulin diacetate, and their mixture with water-soluble polymers was studied. It was shown that mechanical treatment in a planetary mill-acti...