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antioxidant capacity, bioactive compounds, buckwheat groats, Rhizopus oligosporus, solid-state fermentation
The effect of solid-state fermentation with Rhizopus oligosporus on the changes in the total phenolic compounds, rutin, vitamin B and C, tocopherol, phytic acid and antioxidant capacity of raw and roasted buckwheat groats was studied. The roasted groats contained reduced level of studied bioactive compounds as compared to raw groats. In this study was evidenced that the solidstate fermentation with Rhizopus oligosporus enhanced water soluble vitamins (thiamine, pyridoxine and L-ascorbic acid) as well as tocopherols contents. In contrast the decrease of the inositol hexaphosphate, phenolic compounds, the rutin content and antioxidant capacity determined by ACL and ABTS methods was noticed.