Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.9/2579
Título: Hydrothermal production and gel filtration purification of xylo-oligosaccharides from rice straw
Autor: Moniz, Patrícia
Pereira, Helena
Duarte, Luís C.
Carvalheiro, Florbela
Palavras-chave: Agricultural Residues
Autohydrolysis
Gel filtration chromatography 
Hemicellulose
Xylan
Data: 2014
Editora: Elsevier
Citação: Moniz, P.; Pereira, H.;Duarte, L.C.; Carvalheiro, F. - Hydrothermal production and gel filtration purification of xylo-oligosaccharides from rice straw. In:ndustrial Crops and Products, 2014, Vol. 62, p. 460-465
Resumo: Hydrothermal treatment (autohydrolysis) is an advantageous alternative to fractionate biomass that was not yet explored for rice straw. In this work, the process was optimised and proved to be highly selective towards hemicellulose. Hydrolysates containing a mixture of oligomeric compounds (mainly xylo-oligosaccharides, XOS), could be obtained under relatively mild operation conditions (210 degrees C, logR(0) = 3.59), yielding a maximum of 40.1 g/100 g of initial xylan. The produced XOS were separated by molecular mass using gel filtration chromatography (GFC). Different fractions of purified XOS were obtained ranging from small polysaccharides and high DP oligosaccharides (DP >= 23), to medium and low DP oligosaccharides (DP >= 3), and separated fractions of by-products (acetic acid, furan derivatives and phenols) as well as di-, and monosaccharides. GFC was an efficient purification method enabling the recovery of interesting categories of XOS that can have potential applications to the pharma, food and feed industries.
URI: http://hdl.handle.net/10400.9/2579
ISSN: 0926-6690
Versão do Editor: http://dx.doi.org/10.1016/j.indcrop.2014.09.020
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