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Titolo:
Heterogeneity in a water-extractable rye arabinoxylan with a low degree ofdisubstitution
Autore:
Nilsson, M; Andersson, R; Andersson, RE; Autio, K; Aman, P;
Indirizzi:
Swedish Univ Agr Sci, Dept Food Sci, SE-75007 Uppsala, Sweden Swedish UnivAgr Sci Uppsala Sweden SE-75007 i, SE-75007 Uppsala, Sweden Swedish Univ Agr Sci, Dept Chem, SE-75007 Uppsala, Sweden Swedish Univ AgrSci Uppsala Sweden SE-75007 m, SE-75007 Uppsala, Sweden VTT, Biotechnol & Food Res, FIN-02044 Espoo, Finland VTT Espoo Finland FIN-02044 technol & Food Res, FIN-02044 Espoo, Finland
Titolo Testata:
CARBOHYDRATE POLYMERS
fascicolo: 4, volume: 41, anno: 2000,
pagine: 397 - 405
SICI:
0144-8617(200004)41:4<397:HIAWRA>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOLUBLE NONSTARCH POLYSACCHARIDES; WHEAT; ENDOSPERM; VARIETY; FLOUR; GRAIN;
Keywords:
water-extractable rye arabinoxylan; low degree of disubstitution; viscosity; NMR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Physical, Chemical & Earth Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Nilsson, M Swedish Univ Agr Sci, Dept Food Sci, POB 7051, SE-75007 Uppsala, Sweden Swedish Univ Agr Sci POB 7051 Uppsala Sweden SE-75007 , Sweden
Citazione:
M. Nilsson et al., "Heterogeneity in a water-extractable rye arabinoxylan with a low degree ofdisubstitution", CARBOHY POL, 41(4), 2000, pp. 397-405

Abstract

From rye grain samples, water extractable arabinoxylan with a low degree of disubstitution (AX I) was isolated by fractionation on a DEAE-cellulose column. AX I of all rye samples had a similar relative composition of un- and monosubstituted xylose residues and with less than 5% disubstitution. It showed a shear thinning behaviour and the viscosity was related to molecular weight. AX I isolated from different rye varieties had different viscosities at the same concentration. One rye sample had a weight average molecular weight of 125 000 (polydispersity 2) according to calculations from both light scattering and viscosity data. Signals from un- and monosubstituted xylose residues in C-13 NMR spectra were assigned using C-13-HSQC-DEPT and COSY techniques. AX I probably consisted of blocks or different molecules with sparsely and more densely substituted regions. (C) 2000 Elsevier ScienceLtd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/06/20 alle ore 05:53:41