Discussion
Rice bran is a valuable by-product principally because it contains
Answer: D
Correct answer: Fifteen to twenty per cent oil
Rice bran carries 15 to 20 per cent oil, which is what makes it worth processing rather than simply feeding. Rice bran oil is edible, stable at high temperature and rich in oryzanol, and the defatted bran that remains is still a useful protein and fibre source for feed.
The oil is also the reason bran must be stabilised within hours of milling: the same milling that releases it releases lipase, which splits the oil into free fatty acids at several per cent a day and quickly renders it unfit for food use.
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