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Titolo:
Ultrasound-assisted extraction of water-soluble polysaccharides from the roots of valerian (Valeriana officinalis L.)
Autore:
Hromadkova, Z; Ebringerova, A; Valachovic, P;
Indirizzi:
Slovak Acad Sci, Inst Chem, Bratislava 84238, Slovakia Slovak Acad Sci Bratislava Slovakia 84238 em, Bratislava 84238, Slovakia Drug Res Inst Modra, Modra 90001, Slovakia Drug Res Inst Modra Modra Slovakia 90001 st Modra, Modra 90001, Slovakia
Titolo Testata:
ULTRASONICS SONOCHEMISTRY
fascicolo: 1, volume: 9, anno: 2002,
pagine: 37 - 44
SICI:
1350-4177(200201)9:1<37:UEOWPF>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
PECTIC POLYSACCHARIDES; STRUCTURAL FEATURES; SALVIA-OFFICINALIS; ARABINOGALACTAN; HEMICELLULOSES; PLANTS; XYLAN;
Keywords:
extraction; ultrasound; polysaccharides; valerian; Valeriana officinalis; immunostimulatory activity;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Ebringerova, A Slovak Acad Sci, Inst Chem, Dubravska Cesta 9, Bratislava 84238, Slovakia Slovak Acad Sci Dubravska Cesta 9 Bratislava Slovakia 84238
Citazione:
Z. Hromadkova et al., "Ultrasound-assisted extraction of water-soluble polysaccharides from the roots of valerian (Valeriana officinalis L.)", ULTRASON SO, 9(1), 2002, pp. 37-44

Abstract

The insoluble plant residues, obtained after preparation of medicinal tinctures from the roots of valerian (Valeriana Officinalis L.) by classical and ultrasound-assisted extraction with aqueous ethanol in a pilot plant, were subsequently treated with hot water to isolate the accessible polysaccharide cell wall components. At almost equal amounts of the hot-water extractable material, the yields of the recovered polysaccharides were lower in theultrasonical experiment. This is due to the fact that a part of accessiblepolysaccharides were already solubilised by the aqueous ethanol and recoverable from the medicinal tincture. Therefore, the net yield of extracted polysaccharides was enhanced in the ultrasonical procedure. This fact as wellas the sugar composition and structural features of the isolated polysaccharides suggest that ultrasonication have attacked the integrity of cell walls, released and degraded its most accessible polysaccharides (pectic polysaccharides and starch) and increased also the extractibility of its less accessible components - xylan, mannan and glucan. The water-soluble polysaccharide fractions from both the conventional and ultrasonical experiments exhibit significant immunostimulatory activities in mitogenic and comitogenic thymocyte tests. (C) 2002 Elsevier Science B,V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 04:37:01