Influence of Soaking on Crushing Strength of Raw and Parboiled Rice
Open Access
- 11 February 2008
- journal article
- research article
- Published by Taylor & Francis Ltd in International Journal of Food Properties
- Vol. 11 (1), 127-136
- https://doi.org/10.1080/10942910701272320
Abstract
Hardness (crushing strength) of rice decreased with increase in soaking time. A remarkable reduction was observed after complete hydration in parboiled rice (∼85%) than raw rice (27%), which was attributed to greater hydration capacity of parboiled rice (63% d.b.) compared to raw rice (38% d.b.). Crushing strength of unsoaked parboiled rice (∼150 N) was greater than raw rice (∼76 N). On the contrary, crushing strength of fully hydrated parboiled rice (∼23 N) was lower than raw rice (∼55 N). The significant decrease in the hardness of parboiled rice grains upon hydration, however, could not explain the greater energy requirement for wet grinding parboiled rice studied earlier, which, perhaps, could be attributed to the higher slurry viscosity of parboiled rice compared to raw rice.Keywords
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