Physical and Chemical index of Pengyu Brand Stachyose
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Color
White
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Degree of sweetness
about 28% of that of sucrose
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Solubility
167~170 ≧
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Moisture-retaining capacity
lower than that of sucrose and higher than that of high fructose
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Osmotic pressure
a little bit higher than sucrose
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Solubility
extremely easy to be dissolved in water but is not dissolved in non-polarized organic reagents
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Stability
good hot stability in acid conditions and better than sucrose and compound sugar
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Viscosity
stronger than sucrose but weaker than maltose syrup ( 55% of maltose)
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Oxidative and reductive property
with no oxidative and reductive property
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Non-digestibility
the structure of stachyose isα-configuration and can be decomposed into byα-gala- glycosidase. But there is no such enzyme in human gut. Therefore, human gut can not digested stachyose. After intake of stachyose and raffinose, it will go through gastric and intestinal tract and go directly into colon, where there are bifidobacteria and other probiotics that can utilize these oligosaccharides as nutrients.
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Anti-starch retrogradation capacity
a strong inhibitor which may prolong the shelf-life of starch-containing products.
