Non-contact Atomic Force Microscopy of Starch Granules Surface. Part II. Selected Cereal Starches
| Hlavní autori: | , , |
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| Médium: | Článok |
| Jazyk: | angličtina slovenčina |
| ISSN: | ISSN 0038-9056 |
| On-line prístup: | http://www.viks.sk/chk/star_1_03_8_16.doc |
| Abstrakt: | Summaries. Atomic Force Microscopy (non-contact method) was used to examine the surface of starch granules of selected cereals. Depressions which might be typical surface pores or ends of penetrating channels were observed in case of all examined granules. The size and shape of these depressions depended on the botanical origin of the starch. Regions of relatively flat surface without visible structures, pores and protrusions could be detected on the granules studied. Conclusions. Basing on the observations made by means of non-contact Atomic Force Microscopy (NC-AFM) it was found that all the studied cereal starch granules contain depressions, which may be typical surface pores or ends of channels penetrating the whole granule. The shapes and sizes of these depressions depend on starch origin. In case of barley starch the observed depressions have slit-like shape with the larger axis above 100 nm. The slit-like pores could be found also on corn and rye starch granules. The surfaces of oat and rice starch have more round or oval depressions. Their diameters are below 100 nm in case of rice starch and below 40 nm for oat. The depressions are irregularly distributed. Smoother areas, with no visible pores or surface structures have also been found. |
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| ISSN: | ISSN 0038-9056 |
