Modification of bean starch by γ-irradiation: Effect on functional and morphological properties
Modification of bean starch by γ-irradiation: Effect on functional and morphological properties
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DOI：
10.1016/j.lwt.2012.04.028
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发表时间：
2012-11-01
影响因子：
6
通讯作者：
Masoodi, F. A.
中科院分区：
文献类型：
--
作者：
Gani, Adil;Bashir, Mudasir;Masoodi, F. A.
用5、10和20 kGy的γ辐照剂量对红、白、黄和黑芸豆的淀粉进行处理。研究了辐照大豆淀粉的理化、形态和糊化特性。扫描电镜（SEM）观察发现，γ辐照破坏了部分淀粉颗粒，且剂量越大（20 kGy），破坏程度越大。理化性质差异显著，呈强剂量依赖关系。辐照后，芸豆淀粉的羧基含量、溶解度、吸水能力和透光率均有所提高，膨胀性、表观直链淀粉含量、助凝性和糊化性均有所降低。辐射剂量与吸水量、溶解度指数呈正相关，与溶胀指数、峰黏度、谷黏度、击穿度和终黏度呈负相关。膏体性能之间存在高度正相关。辐照后的x射线衍射图基本不变，但结晶度随辐照剂量的增加而降低。(C) 2012 Elsevier Ltd.版权所有。
Starches isolated from Red, White, Yellow and Black Kidney beans were treated by gamma-irradiation doses of 5, 10 and 20 kGy. Physicochemical, morphological and pasting properties of irradiated bean starches were investigated. Microscopic observation under scanning electron microscope (SEM) showed that some of the bean starch granules were destroyed by gamma-irradiation and the breakage was greater at a higher dose (20 kGy). Physicochemical properties differed significantly and showed strong dose-dependent relationship. Carboxyl content, solubility, water absorption capacity and transmittance increased, whereas swelling power, apparent amylose content, syneresis and pasting properties decreased upon the irradiation of kidney bean starch. Radiation doses were positively correlated with water absorption capacity and solubility index and negatively correlated with swelling index, peak viscosity, trough viscosity, breakdown and final viscosity. There were high positive correlations between pasting properties. X-ray diffraction pattern remained same upon irradiation but a decrease in crystallinity was observed with increasing irradiation dose. (C) 2012 Elsevier Ltd. All rights reserved.