HemicellulosesKlaus Fischer, Thomas Heinze Hemicelluloses, comprising the non-cellulose cell wall polysaccharides of vegetative and storage tissues of annual and perennial plants, represent an immense renewable resource of biopolymers. They occur in a large variety of structural types and are accessible to chemical functionalization reactions. In light of this, the volume gives information of the state of the art focusing on new plant sources, isolation methods, and characterization of structural features, physicochemical and various functional properties. Attention has been paid to derivatives prepared from these polysaccharides and to application possibilities of hemicelluloses or hemicellulosic materials. |
Contents
Hemicellulose Composition in the Maren Freese | 13 |
The Structural Molecular and Functional Properties Zdenka Hromádková | 19 |
Carboxymethyl Xylan Control of Properties | 27 |
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2-propanol acetate acidic XOS alkaline antioxidant applied aqueous NaOH arabinose arabinoxylan AX fractions biopolymer birch kraft pulp bleached Carbohydr carboxyl groups carboxymethylation cell wall cellulose Chem chemical Chemistry chromatography components compounds concentration crystallinity curdlan degradation degree of substitution determined dissolving pulp distribution dried Ebringerová ethanol extraction fibre fibrils Figure formation furoate g/mol galactose glucose glucuronic acid hardwood Heinze hemicellulose higher hornification HPMA xylan Hromádková hydrolysis hydrothermolysis investigated isolated kraft pulp lignin lignin content Macromol magnesium alcoholate mannose methyl molar mass molar ratio NaOH Nitren Nitren charge NMR spectroscopy oat spelts obtained oxidation paper plant polymer polysaccharides procedure properties reaction residue samples side chains sodium hydroxide soluble fractions solution spectra spectroscopy starch structure surface synthesis Table temperature tion treatment unbleached viscosity water soluble xylan xylan paste xylose yield