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Graminaceus plants and their main components (lignin and cellulose) were carboxy methylated and compared with woody ones. The solubilities of carboxymethylated biomass, alkaline lignin, klason lignin, holocellulose, and α_cellulose were measured and the crystallinities of α_celluloses were also measured by X-ray diffraction. The main resistance factor to solubilization in water is thought to be the...
Betulinic acid is a biologically active compound, which has been well-known for anti-cancerous properties especially for skin. Recently, it has been drawn attention as a compound for combating AIDS. It can be chemically derived from betulin or by solvent extraction from bark. However, bark extracts are complex mixtures that always contain compounds with a wide spectrum of polarity. In this study,...
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