期刊
COLLOIDS AND SURFACES B-BIOINTERFACES
卷 79, 期 2, 页码 494-500出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfb.2010.05.019
关键词
Ginger; Superfine grinding; XPS; SEM; Physical and chemical characterization
资金
- Fund of Post-doctor Science [20080440388]
- National Natural Science Foundation of China [40701173]
- Project of Agriculture Scientific and Technological Achievement Transfer of China [2009GB2C600198]
The surface composition of five types of ginger powders with the particle sizes of 300, 149, 74,37 and 8.34 mu m was investigated by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and various types of physical-chemical characteristics regarding material particle size distributions, discoloration and chemical composition. The results show that the color differences are greater for superfine ground ginger than for conventional comminuted ones; the values of crude fibre, neutral detergent fiber (NDF) and acid detergent fiber (ADF) decrease with decreasing ginger particle size. However, no relationship with the surface fat, crude protein, ash and total solids exists. With superfine grinding the XPS O/C ratios of the five ginger powders were similar since the surfaces were not oxidized. Correlations were observed between the XPS N/C ratios and the high resolution XPS N is spectra. SEM observations revealed that the surface of ginger powder with a particle size of 300 mu m is rougher, while superfine ground powders with particle sizes of 149, 74, 37 and 8.34 mu m are similar to each other. This roughness difference between these surfaces correlates with the differences in their O/C ratios and the surface morphology of five ginger powders. (C) 2010 Elsevier B.V. All rights reserved.
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