Crystallinity of lyophilised carrot cell wall components |
| |
Authors: | Georget D M Cairns P Smith A C Waldron K W |
| |
Institution: | Norwich Laboratory, Institute of Food Research, Norwich Research Park, Colney, Norwich, NR4 7UA, UK |
| |
Abstract: | The aim of this work was to investigate the effect of removal of cell wall components on the crystallinity of cell walls using X-ray diffraction. Various insoluble cell wall residues were prepared following a sequential extraction of carrot cell wall material. X-ray diffraction patterns were typical of cellulose although there was a possible contribution of pectic polysaccharides to the crystallinity. As more amorphous material was removed to produce a cellulose rich residue, the crystallinity index increased from 12 to 16%, larger than that estimated from cellulose alone. For the last residue treated with 4M KOH, a lower value of crystallinity was found (14%) which resulted from the change of some crystalline domains of cellulose into amorphous regions. Pressing conditions (temperature, water content) have been investigated and did not alter the crystallinity index significantly. |
| |
Keywords: | Carrot Cell wall X-ray Cellulose Crystallinity |
本文献已被 ScienceDirect PubMed 等数据库收录! |
|