Selective Comparison of Native and Nanocrystals of White and Yellow Yam Starches
| Autor: | Abraham Olasupo OLADEBEYE, Aladesanmi Augustine OSHODI, Isiaka Adekunle AMOO, Alias Abd KARIM |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Walailak Journal of Science and Technology, Vol 12, Iss 12 (2015) |
| Druh dokumentu: | article |
| ISSN: | 1686-3933 2228-835X |
| DOI: | 10.14456/vol13iss1pp |
| Popis: | Mild acid hydrolysis at 40 °C for 5 days was used to prepare nanocrystals of the native starches isolated from white yam (Dioscorea rotundata) and yellow yam (Dioscorea cayenensis). The shapes and granular sizes of the native starches were obtained by a scanning electron microscopy while their nanocrystals were examined through transmission electron microscopy. The nanocrystals were found to exist in the form of platelets. X-ray diffraction of the starch nanocrystals showed that they were of V-type crystalline structure whereas the native starches exhibited CB-type crystalline structure. The nanocrystals were insoluble in all the solvents used, except in chloroform, where precipitates were formed. These starch nanocrystals could be potential precursors to nanocomposites and nanoparticle-based copolymers. doi:10.14456/WJST.2015.95 |
| Databáze: | Directory of Open Access Journals |
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