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acid hydrolysis acid treatment acidic solution alkaline amount of catalyst analysis anion exchange anthrone arabinose Asmit barium carbonate barium hydroxide calcium carbonate calcium hydroxide carbohydrates carbon chain Cbem cent calcium carbonate cent supported nickel change in reducing chromatogram color containing decomposition products decrease in periodate dry substance Figure formation of low furfural galactose galacturonic acid genation glucose glucose and sorbitol glycerol grams hexitols hexoses hydro hydrogenation of glucose hydrogenation of masose hydrolysis hydrolysis of maspolyose hydrolyzate neutralized initial pH lignin low molecular products lower polyols mannose Masonoid maspolyose hydrolyzate maspolyose solutions maximum yield methoxyl content methylfurfural monosaccharides neutralized by anion obtained original DS pentitols pentoses periodate consumption polyols and glycols precipitate present investigation products formed propylene glycol purification quantity Raney nickel reaction conditions reducing power reducing substances Rundvik extract sodium soluble sorbitol spot area sugar alcohols sulfuric acid Table tion wood polyoses xylose yield of reducing