Flours
Four rye flours, provided by two local flour mills, were used in the
preparation of spontaneous laboratory sourdoughs (Table 1). Rye
floursAandCwereprovidedby thesameflourmill,whereas rye flours
BandDwereprovidedbyanother flourmill. Flour protein contentwas
determined using near infrared spectroscopy (Miralbés, 2004) and
amylase activitywas assessed by the Hagberg method (Catterall,1998).