13C CP/MAS NMR spectroscopy of native and acid modified starches.
IR@CFTRI: CSIR-Central Food Technological Research Institute, Mysore
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http://ir.cftri.com/7941/
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| Title |
13C CP/MAS NMR spectroscopy of native and acid modified starches.
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| Creator |
Vasudeva, Singh
Zakiuddin Ali, S. Divakar, S. |
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| Subject |
24 Organic Chemistry
30 Starch Chemistry |
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| Description |
13C CP/MAS [cross polarization magnetic angle spinning] NMR spectroscopic studies of some starches from cereals (wheat, maize and finger millet), pulses (green gram, chick pea), tuber (potato) and root (tapioca), and their respective acid (HCl, HNO3) modifed starches, were carried out. While cereal starches exhibited a triplet signal for their anomeric carbons, pulse, tuber and root starches showed doublets. Line width changes in signals indicated that debranching in the modified starches led to narrowing of C6 signals (more pronounced in the case of potato and tapioca starches) and were consistent with the release of branching strains. Potato starch, both native and modifed, was different from other starches as inferred from the chemical shift values for their anomeric carbons and line shape. The dihedral angle (phi'2) calculated from chemical shift values for C1 and conformation of dihedral angel (chi) as predicted from chemical shift of C6 are discussed with respect to structural organization.
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| Date |
1993
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Language |
en
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| Rights |
—
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| Identifier |
http://ir.cftri.com/7941/1/starchstarke%2045%20%28%201993%29%20Nr.%202%2C%20S.%2059-62.pdf
Vasudeva, Singh and Zakiuddin Ali, S. and Divakar, S. (1993) 13C CP/MAS NMR spectroscopy of native and acid modified starches. Starch/Staerke, 45 (2). 59-62 ; 12 ref.. |
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