Document Detail


Surface characterization of ginger powder examined by X-ray photoelectron spectroscopy and scanning electron microscopy.
MedLine Citation:
PMID:  20605705     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The surface composition of five types of ginger powders with the particle sizes of 300, 149, 74, 37 and 8.34 microm 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 1s spectra. SEM observations revealed that the surface of ginger powder with a particle size of 300 microm is rougher, while superfine ground powders with particle sizes of 149, 74, 37 and 8.34 microm 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.
Authors:
Xiaoyan Zhao; Qiang Ao; Fangling Du; Junqing Zhu; Jie Liu
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-05-13
Journal Detail:
Title:  Colloids and surfaces. B, Biointerfaces     Volume:  79     ISSN:  1873-4367     ISO Abbreviation:  Colloids Surf B Biointerfaces     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-07-12     Completed Date:  2010-10-14     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9315133     Medline TA:  Colloids Surf B Biointerfaces     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  494-500     Citation Subset:  IM    
Copyright Information:
Copyright 2010 Elsevier B.V. All rights reserved.
Affiliation:
Institute Agro-Food Science & Technology, Shandong Academy of Agricultural Sciences, No. 198, Gongyebei Road, Jinan, Shandong 250100, China. zhaoxy_2201@163.com
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MeSH Terms
Descriptor/Qualifier:
Ginger / chemistry*,  ultrastructure*
Microscopy, Electron, Scanning
Particle Size
Photoelectron Spectroscopy / methods*
Powders
Surface Properties
Chemical
Reg. No./Substance:
0/Powders

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