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微波辐射对小麦胚芽糊化特性与微观结构的影响

DOI: 10.6041/j.issn.1000-1298.2012.12.028, PP. 151-157

Keywords: 小麦胚芽,微波,扫描电镜,微观结构,糊化特性

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Abstract:

为研究微波辐射对小麦胚芽(WG)品质的影响,采用连续式微波装备对WG进行稳定化处理,并用扫描电镜、粘度仪分析了微波辐射对其微观结构、淀粉糊化等特性的影响。结果表明,微波对WG有很好的稳定化效果,在有效钝酶的前提下经微波处理的WG仍可观察到完整的淀粉颗粒,并伴有清晰的轮廓,但随着微波辐射强度的提高,其中油脂、蛋白质及淀粉之间原有的空间结构发生了一定的改变。微波处理后WG的糊化温度由原来的58.5℃升至59.3~65.4℃,根据初始糊化程度的不同,出现具有一定意义的峰值粘度(349~466BU)和破损值(69~87BU)。微波处理后的WG中脂肪酸组成和α-维生素E含量无明显改变。研究表明,微波辐射在有效钝酶的同时,对WG的品质也产生了部分影响。但与传统热处理方法相比,微波辐射对WG品质影响程度较小,微波稳定化具有很好的工业化应用前景。

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