Abstract

This study aims to assess the effect of decortication methods on the antioxidant activity (AA), total phenolic content (TPC), peroxide value (PV), acid value (AV), free fatty acid (FFA) and total acidity (TA) of two pearl millet cultivars (White and Green) grown in Sudan during 6-month storage. Modern decortication method was carried out by using Tangential Abrasive Dehuller while the grains were decorticated in a traditional way by stone dehuller. The above measurements were determined using standard analytical procedure. Decortication raised the TPC and AA in both cultivars as compared to untreated cultivars. The TPC and AA of modern decorticated cultivars were higher than that treated with traditional decorticated method. Green cultivars exhibited higher TPC than white cultivars. Storage of the grains gradually reduced the TPC of treated and untreated white and green cultivars. Significantly higher PV, AV and FFA was observed in modern decorticated cultivars (particularly Green cultivar) as compared with traditional decorticated and untreated cultivars. At 45th day of storage, a significant rise in PV was found in treated and untreated cultivars. Storage of the grain resulted in gradual increase in AV, FFA and TA with modern decorticated samples having significantly higher values in both cultivars at the end of storage period.

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