The effect of media milling on defatted sesame meal
Date Issued
2007
Date
2007
Author(s)
Wu, Jia-Liang
DOI
zh-TW
Abstract
The defatted sesame meal (DSM) was the by-product from the extracting process of sesame oil. DSM was generally used as animal feed or fertilizer. The components in DSM include protein, cellulose, minerals and lignan glycosides, which were good for the health of human being. It would be beneficial to consumers if DSM could be further processed to be a good product. In this article, the effect of media milling on defatted sesame meal was investigated. Medium-milling would be an alternative method to process DSM and to produce a new product and to increase the useful application. Burma black sesame was used as the experimental material in this study. For removing sesame oil by pressing and n-hexane extracting was order to obtain DSM which with volume mean diameter 239.3 ± 7.85 μm was reduced to nano/submicron scale by the processing of medium milling technology. The influence of solid concentrations on particle size distribution of suspension was discussed. The apparent viscosity, particle size distribution, Zeta potential, TEM and SEM morphology, sesaminol triglucoside contents and appearance of milled product were applied to evaluate the application of suspension.
The mean diameter by volume of DSM is reduced from 239.3 μm to nano/submicron scale after medium milling for 3 hours, which the milling medium is Y-Zr beads with average diameter 0.8 mm and then 0.3 mm. The solid concentration was found a key element on affecting efficiency of milling. The best concentration of milling effect is 5% (w/v). Stability of milled product was indicated by Zeta potential (Z). The TEM photographs proved the morphology of nano/submicron sesame. The SEM photographs shown that milled lyophilized powder has different surface structure compared with raw material. Sesaminol triglucoside contents of milled sesame suspension is higher than that of hot water extract, which were 3.20 and 0.33 mg/g dried weight DSM, respectively.
The milled product would partially remain in milling chamber, especially the surface of Y-Zr beads. Proximate composition of unmilled and milled. The content ratio of crude protein was lower, but the content ratio of dietary fiber was higher. The major was crude protein remain in milling chamber, but proximate composition of milled was not significantly different when compared with that of raw material.
Subjects
脫脂芝麻粕
介質研磨
濃度
粒徑分佈
成份分析
sesame
media-milling
concentration
particle size
composition
Type
thesis