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Production of keto-disaccharides from aldo-disaccharides in subcritical aqueous ethanol.
- Source :
-
Bioscience, biotechnology, and biochemistry [Biosci Biotechnol Biochem] 2016 May; Vol. 80 (5), pp. 998-1005. Date of Electronic Publication: 2016 Jan 20. - Publication Year :
- 2016
-
Abstract
- Isomerization of disaccharides (maltose, isomaltose, cellobiose, lactose, melibiose, palatinose, sucrose, and trehalose) was investigated in subcritical aqueous ethanol. A marked increase in the isomerization of aldo-disaccharides to keto-disaccharides was noted and their hydrolytic reactions were suppressed with increasing ethanol concentration. Under any study condition, the maximum yield of keto-disaccharides produced from aldo-disaccharides linked by β-glycosidic bond was higher than that produced from aldo-disaccharides linked by α-glycosidic bond. Palatinose, a keto-disaccharide, mainly underwent decomposition rather than isomerization in subcritical water and subcritical aqueous ethanol. No isomerization was noted for the non-reducing disaccharides trehalose and sucrose. The rate constant of maltose to maltulose isomerization almost doubled by changing solvent from subcritical water to 80 wt% aqueous ethanol at 220 °C. Increased maltose monohydrate concentration in feed decreased the conversion of maltose and the maximum yield of maltulose, but increased the productivity of maltulose. The maximum productivity of maltulose was ca. 41 g/(h kg-solution).
- Subjects :
- Cellobiose chemistry
Hydrolysis
Isomaltose analogs & derivatives
Isomaltose chemistry
Kinetics
Lactose chemistry
Magnetic Resonance Spectroscopy
Maltose chemistry
Melibiose chemistry
Solutions
Stereoisomerism
Sucrose chemistry
Trehalose chemistry
Disaccharides chemistry
Ethanol chemistry
Water chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1347-6947
- Volume :
- 80
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- Bioscience, biotechnology, and biochemistry
- Publication Type :
- Academic Journal
- Accession number :
- 26786171
- Full Text :
- https://doi.org/10.1080/09168451.2015.1127135