【摘要】 以工业脱脂米糠为原料提取米糠水溶性半纤维素及碱溶性半纤维素，是米糠综合利用的又一有效途径。提出了适合于工业化生产的分步提取途径。研究结果表明：水溶性半纤维素的最佳提取工艺参数为，料液比为１：１０、３ｈ、６０℃；碱溶性半纤维素最佳提取工艺参数为，料液比为１∶１０、４ｈ、２５℃、碱液浓度为１．０Ｎ。在上述工艺条件下，水溶性半纤维素和碱溶性半纤维素的提取率分别为１．４３％和９．０２％。更多还原

【Abstract】 It is valuable to extract water-hemicellulose and alkaline-hemicellulose from defatted rice bran.The optimum processing parameters for water-soluble hemicellulose extroction were as follows:meal-solvent ratio 1∶10,extraction time 3 hours,temperature 60℃.For alkaline-hemicellulose extraction, the parameters were as follows: meal-solvent ratio 1∶10,extraction time 4 hours, temperature 25℃,alkaline concentration 1.0 N.With the optimum parameters,the extraction rates were 1.43% and 9.02% for water-soluble hemicellulose and alkaline-soluble hemicellulose respectively.更多还原