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- W2077950663 abstract "Abstract Curdlan, a β-1,3-glucan produced by fermentation of Alkaligenes faecalis, is a non-ionic gel-forming polysaccharide that is, along with its hydroxalkyl derivatives, a potentially important matrix for life science applications. The commercially available material contains residual nucleic acids, cellular debris and other contaminants that can interfere with electrophoretic separations and visualization procedures. Simple procedures have been developed for purification of the curdlan and coherent gel formation. Curdlan gels can be formed in a variety of chaotrope-containing, or chaotropic, solvents, including 40% formamide, 7 M urea. The chaotropes can be retained or subsequently removed by leaching. Heat treatment before or after leaching enables thermostable gel formation. Hydroxyethyl and glyceryl derivatives of curdlan have been prepared. Depending on the degree of substitution (DS), a whole spectrum of derivatives with a range of unique properties can be obtained. Lower DS hydroxyethyl derivatives form clear, elastic gels in 6 M urea, while the higher DS hydroxyethyl derivatives are soluble in hot water and gel on cooling to form clear, elastic, thermoreversible gels. Partial depolymerization of curdlan by γ-irradiation reduces the viscosity of subsequent preparations, enabling the preparation of higher concentration, more sieving gels. Use of selected preparations to form unique matrices for electrophoretic separations has been demonstrated." @default.
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- W2077950663 date "1997-08-01" @default.
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- W2077950663 title "Purified curdlan and its hydroxyalkyl derivatives: preparation, properties and applications" @default.
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- W2077950663 doi "https://doi.org/10.1016/s0144-8617(97)00058-1" @default.
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