The quality characteristics of muffins with different types of rice flour, such
as soft flour (CON), soft rice flour (SRF), floury rice flour (FRF), and rice
flour (RF) were assessed by using Image J program, which includes their particle
size analysis, moisture content, pH, color, specific volume, baking loss rate,
texture. (D[4, 3]) is weighted mean diameter, which is directly obtained in
particle size measurements showed large values in the order of rice flour,
floury rice flour, soft rice flour, and soft flour. The moisture content was
high in the CON and SRF groups with small particle sizes. There was no
significant difference in pH, L and b value. The a value was significantly low
only in the RF group with large particle size. The smaller the particle size,
the higher the specific volume and baking loss rate. Image J showed that the
number of pores decreased when fewer smaller particles were the powder, but the
pores were larger. Among the rice flours, the SRF group, excluding the CON
group, scored high in all the acceptability elements. The results from this
study can be used as basic data that can contribute to research on various
rice-processed foods.