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Enrichment of rice noodles with fiber-rich fractions derived from cassava pulp and pomelo peel

Abstract
Cassava pulp and pomelo peel were evaluated for their potential as sources of dietary fibre in dried rice noodles. Noodles containing cassava pulp (1–20%) and pomelo peel (1–10%) had significantly higher cooking weight (136–166%) than the control sample (125%). Elongation of noodles containing cassava pulp (61–86%) was significantly higher than that of the control (56%) and noodles containing pomelo peel (29–49%). Total dietary fibre (TDF) content of noodles made from rice flour was 3.0%, and increased to 7.0% and 10.2% after adding 20% of cassava pulp and 10% of pomelo peel, respectively. A combination of cassava pulp and pomelo peel at a total amount of 20% resulted in an obvious increase in cooking weight, whereas tensile stress and elongation of noodles were comparable to those of the control noodle. The highest TDF content obtained was 14.4%.

Keywords
Cassava pulp; Fibre; Noodle; Pomelo peel; Rice noodle

Carbohydrate Technology
Division of Biochemical Technology School of Bioresources and Technology,
King Mongkut’s University of Technology Thonburi (Bangkuntien)
49 Soi Thian Thale 25, Bang Khun Thian Chai Thale Road,
Tha Kham, Bang Khun Thian, Bangkok 10150, Thailand