4. Discussion
As oat bread applications are being explored it is important to
establish whether kilning and milling methods are also suitable for
bread-making purposes. For that purpose we compared here two
kilning methods, steam and infrared (IR) kilning, for effects on
particle size distribution and on oat dough-making properties.
IR harmed the dough-making properties of oat flour completely.
IR -kilned grains produced a very stiff and non-extensible dough
(Fig. 2). This means that IR kilning is not suitable for bread appli-cations
as extensibility is an important characteristic related to
bread quality. It is known that IR and steam kilning treatments can
change the shape of starch granules and affect the protein network
(Hu, Xing, & Ren, 2010). The negative effect of IR kilning in oat
grains might be comparable to the damage that heat causes to
wheat grains, which also is characterized dy a negative impact on
gluten-forming properties (Schofield et al., 1983) and on baking
quality (Ghaiy & Taylor, 1982). The purpose of the heat treatment in
wheat grains is just decreasing moisture of avid damage during