Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/75845
標題: The+Optimum+Drying+Conditions+for+Rice-buckwheat+Extruded+Food
蕎麥擠壓食品最適乾燥條件之研究
作者: Tai, Zue-Wen
戴思雯
Peng, Jin-Chyau
Juang, Shu-Chang
彭錦樵
莊世昌
關鍵字: 熱風乾燥;Optimum drying conditions;蕎麥粉;米穀粉;Buckwheat;Extruded food
出版社: 臺中巿: 國立中興大學農學院
Project: 農林學報, Volume 50, Issue 4, Page(s) 13-28.
摘要: 
A batch hot air dryer was used to study the optimum drying conditions for a rice-buckwheat extruded food in this research. The process variables were drying temperature and drying time of extrudates. The response surface methodology was used to investigate the effects of process variables on extrudate's moisture content, color difference, maximum shear force and hardness.
Results indicated that increasing drying temperature or drying time decreased extrudate's moisture content, maximum shear force and hardness, but increased the color difference.
The optimum drying conditions were developed through the response surface methodology in this study. While the optimum drying temperature was at 75.8 ℃ and drying time was at 91.6 min, the mode1 predicted values were found at 2.04% moisture content, at 1.88 color difference, at 7.90N maximum shear force and at 46.98 hardness. An experiment was taken to testify the response of dependent variables under the optimum drying conditions. The results showed that there were no significant differences between the regression model and experimental results for the moisture content, color difference, maximum shear force and hardness. The optimum drying conditions and regression model developed in this study were useful for the drying processing of rice-buckwheat extruded food.

本研究係利用箱型分批式熱風乾燥機,對經由國產單軸擠壓機所製成之蕎麥風味膨發米食休閒食品進行乾燥之研究,以探討熱風乾燥之操作條件(乾燥溫度以及乾燥時間)對產品物理性狀(含水率、色差值、硬度值以及最大剪切力)之影響。並利用反應曲面法找出最適乾燥條件。
實駿結果顯示:提升乾燥溫度或是延長乾燥時間會使產品之含水率、硬度值以及最大剪切力值下降,但色差值會隨之上升。
藉由反應曲面法評估擠壓產品之最適乾燥範圍,以乾燥溫度75.8℃。乾燥時間91.6mins作為本實驗最適乾燥條件,在此條件下可得模式預估值:舍水率為2.04%、色差值為1.88、最大剪切力為7.90N、硬度值為46.98N之乾燥產品,經實驗之驗證,證明在此最適乾燥範圍內各反應佳狀迴歸模式之預估值與產品實際量測值並無統計上之差異,故可確認迴歸復式之適當性。
URI: http://hdl.handle.net/11455/75845
Appears in Collections:第50卷 第04期
農業暨自然資源學院

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