Polished rice grains (5 g), 5 mL of distilled water and 400 U of TfMA
were mixed in a 25-mL beaker and covered by a piece of aluminiumfoil.
The beaker was immediately placed on the steaming tray with a 10 cm
distance from the surface of boiling water in a kitchen boiler. Put the lid
on. The rice meal was obtained by steaming at ambient pressure for
30 min. Rice grains cooked at the same condition without TfMA were
used as a control. Some of rice meals were stored at 4 °C in small plastic
seal bags to prevent moisture loss for several weeks.