Agar Extraction By-Products from Gelidium sesquipedale as a Source of Glycerol-Galactosides.
Molecules
; 23(12)2018 Dec 19.
Article
em En
| MEDLINE
| ID: mdl-30572590
ABSTRACT
Alkaline treatment is a common step largely used in the industrial extraction of agar, a phycocolloid obtained from red algae such as Gelidium sesquipedale. The subsequent residue constitutes a poorly valorized by-product. The present study aimed to identify low-molecular-weight compounds in this alkaline waste. A fractionation process was designed in order to obtain the oligosaccharidic fraction from which several glycerol-galactosides were isolated. A combination of electrospray ion (ESI)-mass spectrometry, ¹H-NMR spectroscopy, and glycosidic linkage analyses by GC-MS allowed the identification of floridoside, corresponding to Gal-glycerol, along with oligogalactosides, i.e., (Gal)2â»4-glycerol, among which α-d-galactopyranosyl-(1â3)-ß-d-galactopyranosylα1-2â»glycerol and α-d-galactopyranosyl-(1â4)-ß-d-galactopyranosylα1-2â»glycerol were described for the first time in red algae.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ágar
/
Rodófitas
/
Galactosídeos
/
Glicerol
Idioma:
En
Revista:
Molecules
Ano de publicação:
2018
Tipo de documento:
Article