Cactus pear cladodes of 2-3 years were used to obtain a natural purified dietary fibre and their physical, chemical and technological properties were determined. The effect of particle size and washing temperature on the technological properties was studied. Purification produces a decrease in green colour (a*) and an increase in total dietary fibre but reduces the total phenolic compounds, mainly when cladodes are washed at higher temperatures. Technological properties did not present changes in the water retention capacity (WRC), water adsorption capacity and cationic exchange capacity, but it did in swelling capacity (SC), oil absorption capacity, apparent density and setting density, which were influenced by the particle size of the cactus powders. The purified fibre shows a high WRC between 5.20 and 5.86 g g(- 1) and a high SC (7.02-8.27 mL g(- 1)). Purified fibre with a particle size between 600 and 1200 μm, independent of the washing temperature had better insoluble to soluble dietary fibre ratio, total phenolic content and technological properties.
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| http://dx.doi.org/10.3109/09637486.2011.624492 | DOI Listing |
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