小麦粉中阿拉伯木聚糖含量与小麦籽粒之间的关系

本文研究了面粉中阿拉伯木聚糖（简写AX）含量与小麦籽粒特性之间的关系,研究结果表明：AX含量与硬度（r=0.049）、水分（r=0.048）呈微弱正相关;与容重呈显著负相关（r=-0.215）,因为AX主要存在于小麦籽粒面筋蛋白和淀粉之间,当它们之间的AX多时,面筋蛋白和淀粉的量就会减少,容重就会减少;面粉中的AX与不完善粒（r=0.146）、出粉率（r=0.155）呈正相关,因为在小麦籽粒中,麸皮中AX含量占小麦籽粒的30%左右,当出粉率增加,会使一小部分的麸星进入面粉,从而使面粉中的AX增加。     

AX与面粉品之间的关系

本采用不同品种的小麦为原料,首先通过测定小麦籽粒和面粉的品质特性及其阿拉伯木聚糖(AX)含量,对AX含量与小麦粉品质间的关系进行探讨。主要研究结果如下:(1)对小麦品质指标的测定,结果显示不同品种的小麦籽粒间存在较大的差异。面粉中AX含量与蛋白(r=0.27)、麸星含量(r=-0.16)存在存在一定的正相关,而AX含量与白度和降落数值存在微弱的负相关,面粉中AX中含量与面粉的吸水率、面团的形成时间、面团的稳定时间和弱化度呈弱相关性,相关系数分别是r=-0.34、r=0.27和r=-0.09;(2)不同的面粉中AX含量与峰值粘度呈显著负相关,与最低粘度、最终粘度呈弱负相关,当面粉中AX含量增加时,峰值粘度、最低粘度、最终粘度都会降低;峰值粘度与最低粘度、最终粘度呈显著正相关。     

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