Abstract
Abstract The chemical composition and in vitro digestibility of starch extracted from yambean, Sphenostylis stenocarpa , were determined. The white, powdery starch was fibre-free and was characterized by low crude nitrogen, lipid and ash values but very high polysaccharide (nitrogen-free extract), 98.37%. Yambean starch (YBS) amylose was 34%. The reducing sugar yield from its acid digestion was 103 mg 100 mg −1 sample. Only 20.8% of 1% gelatinized YBS was reduced to reducing sugars by 1% salivary amylose extract in 80 min when the achromic stage was attained using a qualitative iodine test. Except for Mg, Ca and Fe ions, the mineral content of yambean starch was very low.
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