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Fast Starch Granule Hydration by Microdrop Generator
01-07-2004
Single potato starch granules were hydrated by a microdrop generator and followed in situ by microdiffraction at the ID13 beamline [1]. A fast hydration step with a half-life of about 7 seconds was found to initiate the process. We plan to extend these experiments to higher temperatures and to study the breakdown of the starch microstructure during gelatinisation.
Figure: a) fibre diffraction pattern of a hydrated starch granule; b) time-sequence of radial intensity distribution of patterns recorded during hydration. Note the strong increase in the 100 reflection intensity with hydration.
[1] H. Lemke, M. Burghammer, D. Flot, M, Rössle and C. Riekel, Biomacromolecules (2004) ASAP Article, DOI: 10.1021/bm0499536