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中国精品科技期刊2020
孙梦,贾健辉,张煜,等. 大米淀粉-单甘酯复合物的性质和结构研究[J]. 食品工业科技,2023,44(14):53−59. doi: 10.13386/j.issn1002-0306.2022080236.
引用本文: 孙梦,贾健辉,张煜,等. 大米淀粉-单甘酯复合物的性质和结构研究[J]. 食品工业科技,2023,44(14):53−59. doi: 10.13386/j.issn1002-0306.2022080236.
SUN Meng, JIA Jianhui, ZHANG Yu, et al. Study on the Properties and Structure of Rice Starch-Monoglyceride Complexs[J]. Science and Technology of Food Industry, 2023, 44(14): 53−59. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2022080236.
Citation: SUN Meng, JIA Jianhui, ZHANG Yu, et al. Study on the Properties and Structure of Rice Starch-Monoglyceride Complexs[J]. Science and Technology of Food Industry, 2023, 44(14): 53−59. (in Chinese with English abstract). doi: 10.13386/j.issn1002-0306.2022080236.

大米淀粉-单甘酯复合物的性质和结构研究

Study on the Properties and Structure of Rice Starch-Monoglyceride Complexs

  • 摘要: 为了减缓大米淀粉在食品加工过程中的老化,采用加热糊化法制备大米淀粉-不同单甘酯复合物,研究甘油单月桂酸酯(GML)、甘油单棕榈酸酯(GMP)和甘油单硬脂酸酯(GMS)三种单甘酯对复合物的理化和结构特性的影响。采用RVA、DSC、FTIR、XRD等方法测定了复合物的糊化特性、热特性、短程有序性及结晶结构。结果表明,不同单甘酯对复合物的复合指数具有显著影响(P<0.05),复合指数为GMP>GMS>GML;与原大米淀粉相比,复合物的溶解度、析水率、回生值以及短程有序性均显著下降(P<0.05),且不同复合物之间也存在显著差异(P<0.05),其中大米淀粉-甘油单棕榈酸酯的析水率、回生值和短程有序性最低,分别为25.58%、281.7 cP和0.58;差式扫描量热和X-射线衍射分析发现,与单甘酯复合后,淀粉由A型结晶结构转变为V型结晶结构。上述结果表明单甘酯的加入在一定程度上可延缓淀粉老化,大米淀粉-甘油单棕榈酸酯复合物抑制淀粉老化效果更好。

     

    Abstract: To slow down the aging of rice starch during food processing, rice starch-monoglyceride complexes were prepared by heating pasting method, and the effects of three monoglycerides, glycerol monolaurate(GML), glycerol monopalmitate (GMP) and glycerol monostearate (GMS), on the physicochemical and structural properties of the complexes were investigated. The pasting properties, thermal properties, short-range ordering and crystalline structure of the complexes were determined by RVA, DSC, FTIR and XRD. The results showed that different monoglycerides had significant effects on the complex index (P<0.05), and the complex index was GMP>GMS>GML. The solubility, precipitation rate, regeneration value and short-range orderliness of the complexes were significantly lower compared with the original rice starch (P<0.05), and there were also significant differences between the complexes (P<0.05). Among them, rice starch-glycerol monopalmitate had the lowest precipitation rate, regeneration value and short-range orderliness of 25.58%, 281.7 cP and 0.58, respectively. Differential scanning calorimetry and X-ray diffraction analysis revealed that the starch changed from A-type crystalline structure to V-type crystalline structure after compounding with monoglycerides. The above results indicated that the addition of monoglycerides could retard starch aging to some extent, and the rice starch-glycerol monopalmitate complexes were more effective in inhibiting starch aging.

     

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