Wednesday, April 12, 2017

Carbohydrates content in rice

As a food material rice is nutritious and easily digestible. In comparison with other grains it is poor in nitrogenous material and fat, and correspondingly rich in non-nitrogenous substances or carbohydrates.

Cleaned rice contains 79% carbohydrate. Carbohydrate of rice is predominantly starch, with small portions of pentosans, hemicelluloses and sugars. As in most starches, both of the major components (amylase and amylopectin) occur generally in rice starch.
Sugars comprise some 0.3 to 0.5% of white rice and about 0.6 to 1.4%b of brown rice. Reducing sugars (maltose) increase and non-reducing sugars (sucrose) decrease during storage. The degradation of carbohydrates to CO2 is usually very small, but it may become significant at moisture more than 14%.

The changes of free carbohydrate content are greatly influenced by temperature. Maillard’s browning reaction between free carbohydrates and free amino acids may play a significant role in CO2 formation.

Fiber is a carbohydrate and is also a carbohydrate blocker. In other words, it slows down the absorption of digestible carbohydrates.
Carbohydrates content in rice
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