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Oligosaccharides of pitaya (dragon fruit) flesh and their prebiotic properties

Oligosaccharides of pitaya (dragon fruit) flesh and their prebiotic properties,10.1016/j.foodchem.2009.11.026,Food Chemistry,S. Wichienchot,M. Jatupor

Oligosaccharides of pitaya (dragon fruit) flesh and their prebiotic properties   (Citations: 3)
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The major carbohydrates of white and red-flesh pitayas (dragon fruit) were glucose, fructose and some oligosaccharides (total concentrations of 86.2 and 89.6g/kg, respectively). The molecular weight distribution of the extract was affected by the extraction solvent. The maximum oligosaccharides content (27.40%), which included fractions with molecular weights of 273–275, 448–500 and 787–911Da, were obtained using 80% ethanol extraction at room temperature (28±2°C). The low molecular weight fraction, including glucose and fructose, was successfully removed by yeast cultivation. The molecular weights of mixed oligosaccharides (716, 700, 490 and 474Da) were confirmed by mass spectrometry. The mixed oligosaccharides showed that they were resistant to hydrolysis by artificial human gastric juice and human α-amylase, giving maximum hydrolysis of 4.04% and 34.88%, respectively. The mixed oligosaccharides were also found capable of stimulating the growth of lactobacilli and bifidobacteria.
Journal: Food Chemistry - FOOD CHEM , vol. 120, no. 3, pp. 850-857, 2010
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