Fortification of rice porridge with either soybean or mung bean
at different percentages to produce instant functional legume-rice
porridge powder was investigated. The lightness and bulk density
of the porridge powder decreased with an increase in the
percentage of both legumes, while the greenness and yellowness
of the legume-rice porridge powder increased. WAI of the
legume-rice porridge powder was not significantly different from
that of the rice porridge powder, except for the product with 30%
mung bean, which possessed the lowest WAI. Addition of higher
percentage of mung bean led to the porridge powder with higher
WSI. WSI of the soybean-rice porridge powder was, on the other
hand, lower than that of the mung bean-rice porridge powder.
Soybean-blended porridge powder exhibited higher TPC, DPPH
radical scavenging capacity, ferric reducing antioxidant power as
well as amino acid and fat contents compared with the mung
bean-blended porridge powder. An increase in the percentage
of either legume led to an increase in the peak temperature and
transition enthalpy. In both the cases of soybean and mung beanblended
porridge powder, amylose-lipid complexes formation was
confirmed by the XRD patterns. CI increased with an increase in
the percentage of soybean but decreased with the more extensive
addition of mung bean. The addition of soybean and mung bean
decreased the peak viscosity of the legume-rice porridge powder.
In all cases, blending in 30% soybean resulted in the higher
TPC, antioxidant activity, amino acid content, complexing index
and level of amylose-lipid complexes formation. A study on the
glycemic index of the legume-rice porridges should be done in the
future to further validate the production of healthy rice porridges