NMR relaxation investigation of the native corn starch structure with plasticizers

Autor:	N. Cioica, Leontin David, Radu Fechete, C. Cota, E. M. Nagy, Onuc Cozar
Rok vydání:	2013
Předmět:	chemistry.chemical_classification Chromatography Morphology (linguistics) Chemistry Starch Organic Chemistry Relaxation (NMR) Analytical chemistry Plasticizer Polymer Analytical Chemistry Inorganic Chemistry chemistry.chemical_compound Glycerol Composition (visual arts) Corn starch Spectroscopy
Zdroj:	Journal of Molecular Structure. 1044:128-133
ISSN:	0022-2860
DOI:	10.1016/j.molstruc.2013.01.037
Popis:	The influences of starch, glycerol and water ratios on the structure, morphology and dynamics of starch polymer chains were investigated by NMR relaxation method. The 1 H NMR CPMG echo decays and saturation recovery build-up curves were recorded and analyzed using the UPIN algorithm in order to get the spin-spin T 2 and spin-lattice T 1 relaxation times distributions. Significant differences between the CPMG curves were observed for native starch and the formulas in which water is added, whether these have or not glycerol in composition. For the formula which contains both plasticizers (water and glycerol), the CPMG curves decay slowly, indicating the presence of more mobile components.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::857ebb2a4cf90b57b3d1681bda461fea https://doi.org/10.1016/j.molstruc.2013.01.037 Zobrazit plný text záznamu Full Text from ScienceDirect