Structure and rheological properties of a xyloglucan extracted from Hymenaea courbaril var. courbaril seeds.
Int J Biol Macromol
; 73: 31-8, 2015 Feb.
Article
em En
| MEDLINE
| ID: mdl-25450047
ABSTRACT
Hymenaea courbaril var courbaril seed xyloglucan was efficiently extracted with 0.1M NaCl, followed by ethanol precipitation (yield=72±5% w/w). Its amorphous structure was identified by the pattern of X-ray diffraction. The monosaccharide composition was determined by GC/MS analysis of the alditol acetates and showed the occurrence of glucosexylosegalactosearabinose (4034206). One-(1D) and two-dimensional-(2D) NMR spectra confirmed a central backbone composed by 4-linked ß-glucose units partially branched at position 6 with non-reducing terminal units of α-xylose or ß-galactose-(1â2)-α-xylose disaccharides. The xyloglucan solution was evaluated by dynamic light scattering and presents a polydisperse and practically neutral profile, and at 0.5 and 1.0% (w/v) the solutions behave as a viscoelastic fluid. The polysaccharide did not show significant antibacterial or hemolytic activities. Overall our results indicate that xyloglucan from H. courbaril is a promising polysaccharide for food and pharmaceutical industries.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Sementes
/
Xilanos
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Extratos Vegetais
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Hymenaea
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Glucanos
Idioma:
En
Revista:
Int J Biol Macromol
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
Brasil