Publication: Chemical force mapping of phosphate and carbon on acid-modified tapioca starch surface
Issued Date
2009-01-01
Resource Type
ISSN
01418130
Other identifier(s)
2-s2.0-57849100670
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Mahidol University
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SCOPUS
Bibliographic Citation
International Journal of Biological Macromolecules. Vol.44, No.1 (2009), 86-91
Suggested Citation
Karntarat Wuttisela, Wannapong Triampo, Darapond Triampo Chemical force mapping of phosphate and carbon on acid-modified tapioca starch surface. International Journal of Biological Macromolecules. Vol.44, No.1 (2009), 86-91. doi:10.1016/j.ijbiomac.2008.10.005 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/27323
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Title
Chemical force mapping of phosphate and carbon on acid-modified tapioca starch surface
Abstract
Surface chemical microstructure of hydrochloric acid hydrolyzed tapioca starch producing different amylose:amylopectin (Am:Ap) ratios were studied with scanning chemical force microscopy (CFM). The chemical force probes were functionalized of two types with -OH (phosphate specific) and -CH3(carbon specific). Lateral force trace-minus-retrace (TMR) images from -OH and -CH3probes revealed changes in the phosphate domains and the carbon backbone for the varying acid hydrolyzed tapioca starch compared to that of the native tapioca starch. Scanning electron micrographs (SEM) showed different degree of the granule surface disruption before and after hydrolysis. The exterior structures of the acid hydrolyzed starch granules were chemically investigated with CFM to study the relationships of the surface molecular structures and the Am:Ap ratios. © 2008 Elsevier B.V. All rights reserved.