期刊
CARBOHYDRATE POLYMERS
卷 174, 期 -, 页码 980-989出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2017.07.026
关键词
Cycloamylose; Phenolic compounds; Molecular interaction; Fluorescence spectra; Isothermal titration calorimetry; Nuclear magnetic resonance spectroscopy
资金
- Cooperative Research Program for Agriculture Science & Technology Developmentfunded by Rural Development Administration [PJ01124103]
- Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, Forestry and Fisheries (IPET) through High value-added Food Technology Development Program, - Ministry of Agriculture, Food and Rural Affairs (MAFRA) [315065-03-2-HD020]
The complex formation capability of cycloamylose (CA), having a degree of polymerization of 23-45, with phenolic compounds (PCs) was investigated using various physicochemical techniques. The fluorescence intensity of PCs increased and then reached a plateau at 10-20 mM cyclodextrin, while it continued to increase at up to 60 mM CA. Thermodynamic data of CA complexes with PCs revealed that the binding process was primarily enthalpy-driven and spontaneous. CA favored to form the most stable complex with chlorogenic acid (CHA) among all PCs. Chemical shift changes for the protons in interior and exterior of CA, as well as in PCs suggested a possible formation of both inclusion and extramolecular interactions between CA and PCs. The ROESY spectrum confirmed that the aromatic moieties of CHA were partially interacted with CA molecules through relatively weak binding. XRD, DSC, and SEM results also supported the complex formation by intermolecular interaction between CA and CHA. (C) 2017 Elsevier Ltd. All rights reserved.
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