化学
当归
多糖
透射电子显微镜
结晶学
热重分析
傅里叶变换红外光谱
铁酸盐
高分子
分子
差示扫描量热法
红外光谱学
化学工程
有机化学
生物化学
工程类
病理
物理
吸附
热力学
医学
中医药
替代医学
作者
Kaiping Wang,Z. Chen,Yu Zhang,Peipei Wang,J.F. Wang,Dai Liquan
标识
DOI:10.1002/cjoc.200890189
摘要
Abstract The molecular weight and the proposed structure of the Angelica sinensis polysaccharide‐iron complex (APIC) were studied. Fourier transform infrared spectroscopy, X‐ray powder diffraction, differential scanning calorimetry, transmission electron microscopy, electron paramagnetic resonance, thermogravimetric analysis, atomic force microscopy, and gel filtration chromatography were used to characterize APIC, which is a macromolecule complex composed of Angelica sinensis polysaccharide (ASP) and iron. The structure of APIC was proposed to be a polynuclear ferrihydrite core chelated firmly by an encircling framework of ASP chains, forming a core molecule, which is surrounded by a removable outer protective sheath of colloidal ASP. And the molecular formula of APIC was proposed to be {[(Fe 2 O 3 ·2.2H 2 O) 1043 (ASP) 32 ](ASP) 12 }, with MW =270000 Da.
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