籼米品种对鲜湿米粉品质影响的研究

    Effects of indica rice varieties on the quality of instant fresh rice noodles

    • 摘要: 我国籼米种类繁多,且受地域、气候等因素的影响导致不同品种籼米基本特性之间存在差异,进而影响鲜湿米粉的品质。以5种籼米为研究对象,通过对籼米基本理化指标、水化特性、糊化特性、凝胶特性及鲜湿米粉质构特性进行分析,并综合感官评价,研究籼米品种对鲜湿米粉品质的影响。结果表明:不同籼米品种基本理化指标及水化特性间存在显著性差异;籼米糊化特性差异主要体现在衰减值与回生值,衰减值越低,回生值越高;籼米凝胶冻融循环稳定性越好,越有利于米粉加工后期凝胶化。比较籼米凝胶特性发现,籼米凝胶强度及凝胶破裂距离越大,凝胶持水性越好,凝胶稳定性及抗剪切能力越好,制作出的鲜湿米粉咀嚼功、坚实度及弹性越大,综合感官评分越高。分析鲜湿米粉品质与籼米基本理化指标的相关性发现,鲜湿米粉质构特性与籼米直链淀粉含量、凝胶强度显著相关。综合质构特性及感官评价可知,由丝苗米制作的鲜湿米粉品质最好。

       

      Abstract: There are many varieties of indica rice in China, the basic characteristics of which vary due to regional and climatic factors, consequently affecting the quality of instant fresh rice noodles.In this study, five kinds of indica rice were used as the research objects, and the basic physiochemical indexes, properties of hydration, gelatinization properties, gel properties, and texture of instant fresh rice noodles were analyzed. In combination with the sensory evaluation, effects of varieties of indica rice on the quality of instant fresh rice noodles were evaluated. The results showed that there were significant differences of the basic physicochemical indexes and hydration properties among different varieties of indica rice. The difference of the gelatinization properties was mainly manifested in the breakdown and the setback values. The lower the breakdown value, the higher the setback value. Better freezing-thawing cycle stability of rice gel was beneficial for the gelation in the later stage of rice noodles processing. In comparison of the gel properties of rice, the higher the gel strength and gel breaking distance, the higher the water holding capacity, and the better the gel stability and shear resistance. In this case, the instant fresh rice noodles had higher chewing power, firmness, elasticity, and comprehensive sensory score.According to the analysis of the correlation between the quality characteristics of instant fresh rice noodles and the basic physicochemical indexes of five kinds of rice, the texture characteristics of instant fresh rice noodles were significantly related to amylose content and gel strength of rice. In combination of texture characteristics and sensory evaluation, the quality of instant fresh rice noodles made from See-Mew rice was the best.

       

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