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題名 | 鹼處理及混合濃度對組織化之羧甲基纖維素與黃豆分離蛋白混合物之機械性質與微結構之影響=Effect of Alkaline Treatment and Mixing Concentration on the Mechanical Properties and Microstructure of Texturized Carboxymethyl Cellulose/Soy Protein Isolate Products |
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作者姓名(中文) | 柯易昌; 陳榮輝; | 書刊名 | 食品科學 |
卷期 | 24:1 1997.02[民86.02] |
頁次 | 頁94-107 |
分類號 | 346.77 |
關鍵詞 | 黃豆分離蛋白; 羧甲基纖維素; 鹼處理; 組織化蛋白; 構形變化; Soy protein isolate; SPI; Carboxymethylcellulose; CMC; Alkaline treatment; Texturized protein; Conformational changes; |
語文 | 中文(Chinese) |
中文摘要 | 本研究的目的在探討受鹼處理( pH 10 ∼ 12.5)之羧甲基纖維素( CMC )與黃 豆分離蛋白之構形變化、 最適之 CMC- 黃豆分離蛋白混合比例與 CMC 之濃度對組織化 CMC- 黃 豆分離蛋白之機械性質與微結構之影響。CMC 之內生性黏度隨 pH 上升而輕微下降,但黃豆 分離蛋白之內生性黏度則是先上升後下降,於 pH11.5 時最大。隨 pH 值之上升黃豆分離蛋 白之雙硫鍵含量下降但硫氫基含量上升。 在 pH11.5 時,2% 黃豆分離蛋白之視黏度與 15% 黃豆分離蛋白凝固物之剪斷力最大。攪動黃豆分離蛋白凝膠團所需之扭力隨著黃豆分離蛋白 濃度上升而提高, 但當添加不同濃度之 CMC 後, 攪動混合物所需之扭力於 CMC 濃度達 0.94% 時最大,之後其扭力值下降。 比較不同濃度 CMC 之組織化 CMC- 黃豆分離蛋白與純 黃豆分離蛋白之機械性質, 發現當以 15% 黃豆分離蛋白與 0.94%CMC 混合所得之組織化產 物之剪斷力、拉力與穿破力均最大。CMC 濃度太高時,組織化產物之上述機械力反而下降。 另由 SEM 之顯微觀察, 發現 CMC 濃度為 0.94% 時之組織化 CMC- 黃豆分離蛋白之纖維化 最明顯,濃度太高時其結構反而不好,但若未添加 CMC,則完全沒有纖維化之產生。結果說 明了鹼處理與適當之 CMC 之濃度對組織化 CMC- 黃豆分離蛋白之製造是相當重要。 |
英文摘要 | The effects of conformational changes of carboxymethyl cellulose (CMC) a nd soy protein isolate (SPI) induced by alkaline treatments (pH 10.0 ∼ 12.5), t he optimum ratio of CMC and SPI, and the concentration of CMC on the mechanical properties and microstructure of texurized CMC-SPI were investigated. The intri nsic viscosity of CMC decreased slightly with increasing pH. However, the intrinsic visosity increased at the beginning and then decreased, and the maximum intrinsic viscosity was found at pH 11.5 for the SPI solution. the disulfide and sulfhydryl groups of SPI decreased and increased, respectively, with an increase in the solution pH. At pH 11.5, the apparent viscosity of 2% SPI and shear force of 15% SPI acid-coagulated product were both maximum values. The torque needed in mixing the alkaline SPI dope increased with increasing SPI conc; however, the torque increased and then decreased for the alkaline CMC-SPI dope, At a CMC conc. of 0.94%, the alkaline CMC-SPI dope had the maximum torque. The shear, tensile, and penetration forces of the texturized CMC-SPI increased and then decreased with an increasing concentration of CMC. The maximum values of the three forces were observed at a CMC conc. of 0.94%. An SEM micrograph showed that the most integrated fiber network formed at a CMC con. of 0.94%. The network was gradually destroyed as the CMC conc. increased to over 0.94%. However, the network could not form without CMC participation. The results indicated that the concentration of CMC and alkali induced conformational changes of SPI were vital factors in texturized CMC-SPI. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。