草酸侵蚀马铃薯回生淀粉制备晶种促进玉米淀粉回生的研究
Study on the retrogradation speeding of maize starch caused by seeds form retrograded potato starch after treating with oxalic acid
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摘要: 回生淀粉具有积极的生理作用,本文采用草酸侵蚀马铃薯回生淀粉制备晶种促进玉米淀粉的回生,使得玉米淀粉的回生率从7.37%提高至11.46%。X-射线衍射表明经草酸侵蚀后马铃薯直链及支链回生淀粉均显示出了典型的B型衍射峰,即酸处理使得淀粉具有明显规则的形貌特征。以草酸侵蚀的马铃薯直链淀粉为晶种促进玉米淀粉回生长晶后,淀粉显示出了明显的B型衍射峰,且具有规则的外观形貌。这是由于分支度低的玉米淀粉分子在溶液中快速移动,向较规则形貌的马铃薯直链淀粉晶种上聚集并生长,这样既保持了马铃薯直链淀粉的晶体形貌又显著地提高了玉米淀粉的回生率。研究成果为促进玉米淀粉回生提供一条全新的途径。Abstract: Retrograded starch has the positive influence on physiology. The retrograded potato starch dealed with oxalic acid was used as seeds to promote the retrogradation of corn starch. The retrogradation ratio was raised from 7.37% to 11.46%. All of the potato starch showed typical B type diffraction peaks after deposed by oxalic acid.It seemed that acid treatment made the morphology of starch more regularly.The potato amylose grew quickly in the solution of maize starch and showed obvious B type diffraction peaks,with the regular morphology.The low branching corn starch molecules in solution moved quickly to the seed of potato amylose and grew rapidly. The retrogradation ratio was enhanced and the morphology was similar to potato amylose. The findings in the paper provided a new way to control retrogradation of corn starch.
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