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Fructooligosaccharides
Fructooligosaccharides (FOS) also sometimes called oligofructose or oligofructan, are oligosaccharide fructans, used as an alternative Sugar substitute, sweetener. FOS exhibits sweetness levels between 30 and 50 percent of sugar in commercially prepared syrups. It occurs naturally, and its commercial use emerged in the 1980s in response to consumer demand for healthier and calorie-reduced foods. Chemistry Two different classes of fructooligosaccharide (FOS) mixtures are produced commercially, based on inulin degradation or transfructosylation processes. FOS can be produced by degradation of inulin, or polyfructose, a polymer of D-fructose residue (chemistry), residues linked by β(2→1) bonds with a terminal α(1→2) linked D-glucose. The degree of polymerization of inulin ranges from 10 to 60. Inulin can be degraded enzymatically or chemically to a mixture of oligosaccharides with the general structure Glu–Frun (abbrev. GFn) and Frum (Fm), with n and m ranging from 1 to 7. Thi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kestose
Kestose is a class of sugars that belongs to a group of Fructooligosaccharide, fructooligosaccharides. Chemical properties Kestoses are typical fructooligosaccharides, and in its structure, one fructose molecule is combined with sucrose to form a trisaccharide. In the 1-kestose type, the fructose molecule will be connected to sucrose by a (1→2β) glycosidic bond. Different types of kestoses have different lengths of subunits in the chain, for example, 6-kestose has from 10 to 200 fructose residues and is also called levan type fructooligosaccharide. Also, 1-kestose has less than 50 fructose residues in the chain and is also called inulin type fructooligosaccharide. Kestoses are categorized based on their structure into 3 main groups: 1-kestose, 6-kestose, neokestose. The most common of them is 1-kestose which is found in many plants. Biosynthesis According to the conditions of the plant cell, kestose biosynthesis occurs in the vacuole. The precursor molecule of kestose is s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |