不同贮藏条件下大米品质的变化
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(1.中国农业大学食品科学与营养工程学院 北京 100083;2.今麦郎食品股份有限公司 河北邢台 054001;3.国家粮食产业(药用功能资源开发)技术创新中心 北京 100193)

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“十四五”国家重点研发计划项目(2022YFFF 1100505);中国博士后科学基金资助项目(2022M723417,2023T160693)


The Quality Changes of Rice at Different Storage Conditions
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(1.College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083 ;2.Jinmailang Food Co., Ltd., Xingtai 054001, Hebei;3.National Center of Technology Innovation for Medicinal Function of Food, National Food and Strategic Reserves Administration, Beijing 100193)

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    摘要:

    以“盐丰大米”为试验对象,在不同温度(15 ℃、室温20~25 ℃和37 ℃)下贮藏300 d,定期评估其理化指标、色差、糊化特性、质构特性和蒸煮特性的变化规律,为大米贮藏过程中品质变化预测提供参考。试验结果表明:在不同温度贮藏期间,大米的品质特性均发生显著变化,且温度越高,变化越明显。其中,大米水分含量、蛋白质含量、巯基含量、L值、a值、黏着性、米汤pH值随贮藏时间的延长呈下降趋势,在37 ℃高温贮藏条件下,分别下降了2.44%,0.49%,1.1%, 12.81,2.84,0.21,1.2;b值、回生值、糊化温度、吸水率、膨胀体积呈上升趋势,在37 ℃高温贮藏条件下,分别上升了18.69,349cP,12.2 ℃,152%,197%。此外,其它指标在不同温度下的变化趋势有所差异。在15 ℃低温贮藏条件下,大米的咀嚼性先升高后降低,弹性变化不显著,峰值黏度下降,回复性上升。而在37 ℃高温贮藏条件下,其咀嚼性、回复性、峰值黏度和崩解值均呈先上升后下降的趋势,弹性总体呈下降趋势。结合咀嚼性、峰值黏度、崩解值与食味值的相关性,“盐丰大米”在37 ℃贮藏60 d后食味性达到最佳。

    Abstract:

    Yanfeng rice' was stored at different temperatures (15 ℃, room temperature, 20-25 ℃ and 37 ℃) for 300 d, and its physical and chemical indexes, color difference, gelatinization characteristics, texture characteristics and cooking characteristics were evaluated regularly in order to provide reference for predicting the quality change of rice during storage. The results showed that the quality characteristics of 'Yanfeng Rice' changed significantly during storage at different temperatures, and the higher the temperature, the more obvious the change trend was. Among them, rice moisture content, protein content, sulfhydryl content, L, a, adhesion value, pH of rice soup decreased with the extension of storage time, at 37 ℃, the indicators decreased by 2.44%, 0.49%, 1.1%, 12.81, 2.84, 0.21 and 1.2, respectively; b, setback value, gelatinization temperature, water absorption rate, and expansion volume increased, at 37 ℃, the indicators increased by 18.69, 349cP, 12.2 ℃, 152%, and 197%, respectively. In addition, the change trend of other indexes at different temperatures is different. Under the condition of low temperature storage at 15 ℃, the chewiness of 'Yanfeng Rice' increased at first, and then the elasticity did not change significantly, and the peak viscosity decreased and the recovery increased. However, the peak viscosity and disintegration value of masticatory resilience increased at first and then decreased at 37 ℃, and the elasticity showed a downward trend as a whole combined with the correlation between peak viscosity disintegration value of chewiness and taste value, the taste of 'Yanfeng Rice' reached after being stored at 37 ℃ for 60 d.

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席孟瑶,赵卿宇,李丽娜,王红,王超,郝智慧,沈群.不同贮藏条件下大米品质的变化[J].中国食品学报,2024,24(12):288-298

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  • 收稿日期:2023-12-17
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  • 在线发布日期: 2025-01-23
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