The carbohydrate region of the HSQC spectra were practically identical for compounds 1a/b and 3, the NMR data indicated the presence of two terminal 6-desoxy hexoses
, one terminal hexose
and two substituted hexoses
A main step of starch synthesis implies utilizing the hexoses
of sucrose hydrolysis and ultimately the conversion of that carbon into starch (DALE; HOUSLEY, 1986).
Considering first synthetic methods, then synthetic intermediates, chemists from Europe and the Americas discuss such topics as using hypo-phosphorous acid in the radical chain deoxygenation of carbohydrates, a phosphoramidite approach to synthesizing sugar nucleotides, synthesizing theoglycodises and thioimidates from glycosyl, ethylene dithioacetals of common hexoses
, and the functionalization of terminal positions of sucrose.
Predictions of actual ethanol yields were based on hexoses
, or six-carbon sugars, present within the plant cell wall and as soluble sugars.
It is embedded in a matrix of lignin and hemicelluloses, which are branched hetero-polymers of pentoses (xylose, arabinose) and hexoses
(glucose, mannose, galactose), sometimes substituted with uronic acids (or their O-methyluronic derivatives), acetyl groups and phenolic compounds in various proportions (Deutschmann and Dekker, 2012; Menon and Rao, 2012).
sucrose is suggested to be the principal sugar in the phloem exudates in daylily (Bieleski 1995) but hexoses
have also been found to be translocated during petal senescence (van Doom & Woltering, 2008).
Disaccharides are linked sugars, typically hexoses
such as sucrose, lactose, and maltose.
A novel mechanism for the oxidation of erythroseries pentoses and hexoses
by n-arylbromosulphona-mides in alkaline medium" Journal of Carbohydrate Chemistry, 21(3): 219-234.
At the moment there is a lack of microbes that will efficiently convert both hexoses
and pentoses into ethanol," explained Dr Weber.
Regarding the disintegration of hemicellulose, Marutzky and Roffael (1977) described reactions of hexoses
to oxymethylfurfural and further toward furfural and formaldehyde.
C, the hexoses
in leaves of previously MS and SS plants decreased to 48% and 34% of total sugars, respectively, compared to 65% in unstressed controls.
After successfully finding ways to break down corn fiber into hexoses
and pentoses, the researchers' next challenge is to identify or develop strains of microorganisms that will convert both of these sugar types to ethanol as efficiently as bakers' yeast makes it commercially from hexoses