Ethanolic fermentation of pentoses
in lignocellulosic hydrolisates.
Competition between pentoses
and glucose during uptake and catabolism in recombinant Saccharomyces cerevisiae.
As pesquisas sobre os derivados de hexoses e pentoses
tem aumentado muito desde 2004, quando um relatorio do Departamento de Energia dos EUA  identificou uma plataforma contendo 12 moleculas derivadas de carboidratos e seus possiveis derivados [1,4-diacidos contendo quatro atomos de carbono: acido succinico, acido fumarico e acido malico, acido 2,5-dicarboxilico furano (FDCA), acido 3-hidroxipropionico, acido aspartico, acido glucarico, acido glutamico, acido itaconico, acido levulinico, 3-hidroxibutirolactona, glicerol, sorbitol, e os alcoois derivados da xilose e da arabinose (xilitol e arabinitol)].
Devi R, Muhjral N, Gupta AK, Kaur N (2007) Cadmium induced changes in carbohydrate status and enzymes of carbohydrate metabolism, glycolysis and pentose
phosphate pathway in pea.
63) The new variant of SSF is simultaneous saccharification and co-fermentation (SSCF), wherein both pentoses
and hexoses are simultaneously fermented into ethanol.
Alternative approach for utilization of pentose
stream from sugarcane bagasse by an induced flocculent Pichia stipitis.
At the moment there is a lack of microbes that will efficiently convert both hexoses and pentoses
into ethanol," explained Dr Weber.
Metallic catalysts have been reported as enhancers to the production of furfural, they may act as Lewis acids promoting the reaction or may stabilize the intermediates in the dehydrocyclization of pentoses
Hemicelluloses are mixtures of pentoses
05 Soil depth Total Percentage Pentoses
(m) sugars of total C Gallery forest 0-0.
COMPOUND CONSTITUENTS MONOSACCHARIDES Monosaccharides Pentoses
(5-C sugars) Arabinose Xylose Ribose Hexoses (6-C sugars) Glucose Fructose Galactose Mannose Disaccharides Sucrose Glucose-fructose Maltose Glucose-glucose Lactose Glucose-galactose Trisaccharides Raffinose Glucose-fructose- galactose Polysaccharides Pentosans Araban Arabinose Xylan Xylose Hexosans Starcha Glucose Celluloseb Glucose Glycogen Glucose Insulin Fructose Mixed Polysaccharides Hemicellulose Mixtures of pentoses
and hexoses Pectins Pentoses
and hexoses mixed with salts of complex acids Gums Pentoses
and hexoses Oligosaccharides (c) Fructo- and galacto- Monosaccharide oligosaccharides, units, 3 to 9 (e.
Initially described as a product of the reaction of pentoses
with proteins , it was later shown to be derived as well from glucose under physiological conditions of pH and temperature, provided that the reaction occurred in the presence of oxygen and traces of transition metals (oxidative conditions) .