Soluble dietary ﬁbres from sugarcane bagasse were extracted under alkaline conditions and characterised. Precipitated ﬁbres were dialysed, and the ﬁbre composition was evaluated before and after the dialysis step. Compositional analysis indicated that the ﬁbres both before and after dialysis consisted of 39% w/w total sugars, 16% w/w protein, 10% w/w Klason lignin and 30% w/w ash. Xylose was the main neutral sugar followed by arabinose with glucose, galactose and uronic acids also present in all samples. The structural properties were also spectroscopically examined, which conﬁrmed the presence of arabinoxylans. Macromolecular characterisation revealed that molecular weight is reduced after dialysis, indicating that a range of dietary ﬁbres with diﬀerent macromolecular characteristics may be obtained depending on the speciﬁc processing steps. The present work shows that soluble arabinoxylans may be obtained from sugarcane agricultural wastes that may be used as a source of novel dietary ﬁbres.
|Journal||International Journal of Food Science and Technology|
|Publication status||Published - 23 Jun 2020|