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中国精品科技期刊2020
张彩芳, 张明玉. 不同切片方式对黄秋葵热风干燥特性的影响[J]. 食品工业科技, 2018, 39(18): 27-32. DOI: 10.13386/j.issn1002-0306.2018.18.006
引用本文: 张彩芳, 张明玉. 不同切片方式对黄秋葵热风干燥特性的影响[J]. 食品工业科技, 2018, 39(18): 27-32. DOI: 10.13386/j.issn1002-0306.2018.18.006
ZHANG Cai-fang, ZHANG Ming-yu. Effect of Different Cutting Methods on Hot Air Drying Characteristics of Okras (Abelmoschus esculentus (L.) Moench)[J]. Science and Technology of Food Industry, 2018, 39(18): 27-32. DOI: 10.13386/j.issn1002-0306.2018.18.006
Citation: ZHANG Cai-fang, ZHANG Ming-yu. Effect of Different Cutting Methods on Hot Air Drying Characteristics of Okras (Abelmoschus esculentus (L.) Moench)[J]. Science and Technology of Food Industry, 2018, 39(18): 27-32. DOI: 10.13386/j.issn1002-0306.2018.18.006

不同切片方式对黄秋葵热风干燥特性的影响

Effect of Different Cutting Methods on Hot Air Drying Characteristics of Okras (Abelmoschus esculentus (L.) Moench)

  • 摘要: 为提升黄秋葵热风干燥效率和产品品质,实验采用两种不同的切片方式处理新鲜黄秋葵。研究了不同切片方式对黄秋葵热风干燥特性及感官评价的影响;利用Weibull分布函数对黄秋葵热风干燥曲线进行拟合,并分析整个干燥过程;采用模糊数学法对干燥产品进行感官评价。研究表明:Weibull分布函数能够准确的描述黄秋葵整个热风干燥过程中水分比随干燥时间的变化规律,其决定系数R2和离差平方和χ2分别在0.994~0.998和8.57×10-4~9.12×10-4之间;不同切片方式下,黄秋葵热风干燥过程中Weibull分布函数的形状参数均小于1,整个热风干燥过程为降速干燥,其干燥过程主要受内部水分扩散的控制;黄秋葵有效水分扩散系数在2.66×10-10~6.97×10-10 m2/s之间,符合食品物料干燥有效水分扩散系数10-12~10-8 m2/s数量级范围;黄秋葵横切处理能够提升其热风干燥产品消费者的接受程度。通过对比不同切片方式下黄秋葵热风干燥行为发现,新鲜黄秋葵横切处理方式较适合应用于高品质黄秋葵干制品加工过程中。

     

    Abstract: In order to improve the drying efficiency and quality of okra products during hot air drying, two different cutting methods (cross cutting and longitudinal cutting) were used to treat fresh okra. The effects of different cutting methods on hot air drying characteristics and quality characteristics of okra were studied. The Weibull distribution function was applied to analyze the drying process of okra drying curve. The sensory evaluation of dried products was done by fuzzy mathematics. It was found that Weibull model was suitable for predicting the MR of okras and okra slices during HAD. Values of R2 and χ2 ranged from 0.994 to 0.998 and 8.57×10-4 to 9.12×10-4, respectively. The shape parameters of the Weibull distribution function were less than 1 during the hot air drying process under different cutting methods, and it indicated that the whole hot air drying process was at a reduced speed. The drying process was mainly controlled by the internal water diffusion. The effective moisture diffusion coefficient of the okra was between 2.66×10-10 to 6.97×10-10 m2/s, which was in line with the range of the dry effective moisture diffusion coefficient of food materials that 10-12 to 10-8 m2/s. Based on the drying and quality characteristics of okras, cross cutting should be developed to overcome some limitations of traditional whole okra fruits hot air drying process.

     

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