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A Method for Estimating the Nature and Relative Proportions of Amorphous, Single, and Double-Helical Components in Starch Granules by13C CP/MAS NMR
Abstract
An improved method to analyze the (13)C NMR spectra of native starches, which considers the contribution of the V-type conformation and the nature of the amorphous component, has been developed. Starch spectra are separated into amorphous and ordered subspectra, using intensity at 84 ppm as a reference point. The ordered subspectra of high amylose starches show the presence of both V-type single helices and B-type double helices. Relative proportions of amorphous, single, and double-helical conformations are estimated by apportioning intensity of C1 peak areas between conformational types on the basis of ordered and amorphous subspectra of the native starch. Quantitative analysis shows that the V-type single-helical component increases with amylose content of starches. Different amorphous subspectra are needed to provide a consistent analysis of granular starches from diverse sources. The method of preparation was found to be more important than the starch botanical origin in determining (13)C NMR spectral features of amorphous samples.
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Cited by
Warren, F. J., Gidley, M. J., & Flanagan, B. M. (2016) · Carbohydrate Polymers · doi:10.1016/j.carbpol.2015.11.066 · Cited by 931
Self-citationZhang, B., Chen, L., Li, X., Li, L., & Zhang, H. (2015) · Food Hydrocolloids · doi:10.1016/j.foodhyd.2015.05.002 · Cited by 253
Htoon, A., Shrestha, A. K., Flanagan, B. M., Lopez-Rubio, A., Bird, A. R., Gilbert, E. P., & Gidley, M. J. (2009) · Carbohydrate Polymers · doi:10.1016/j.carbpol.2008.06.016 · Cited by 232
Self-citationEffect of cryo-milling on starches: Functionality and digestibility
Dhital, S., Shrestha, A. K., & Gidley, M. J. (2010) · Food Hydrocolloids · doi:10.1016/j.foodhyd.2009.08.013 · Cited by 144
Self-citationUltrasound-assisted hydration offers a novel approach to anneal in-situ pinto bean starch
Kumar, G., Hooper, J. F., Li, E., Devkota, L., & Dhital, S. (2025) · Carbohydrate Polymers · doi:10.1016/j.carbpol.2025.123602 · Cited by 11
Metadata
- Authors
- Tan, I., Flanagan, B. M., Halley, P. J., Whittaker, A. K., & Gidley, M. J.
- Venue
- Biomacromolecules
- Publisher
- American Chemical Society (ACS)
- Published
- 2007-02-01
- Volume
- 8
- Issue
- 3
- Pages
- 885-891
- ISSN
- 1525-7797 (ISSN-L)
- 1526-4602
- OpenAlex
- W2016527357
- Cited by
- 480
- References
- 0
- FWCI
- 5.11
- Type
- journal article
- Language
- en
- Open access
- closed
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- Tan, I., Flanagan, B. M., Halley, P. J., Whittaker, A. K., & Gidley, M. J. (2007). A Method for Estimating the Nature and Relative Proportions of Amorphous, Single, and Double-Helical Components in Starch Granules by13C CP/MAS NMR. Biomacromolecules. https://doi.org/10.1021/bm060988a
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