Abstract
Research on the effect of processing on the retention of bioactive components with potential antioxidant activity is gaining importance. The objective of this investigation was to evaluate the effect of various processing methods (milling, boiling, pressure cooking, roasting and germination respectively) on the antioxidant components as well as the antioxidant activities in the commonly used pearl millet cultivars-Kalukombu (K) and Maharashtra Rabi Bajra (MRB). The methanolic extracts of processed pearl millet flours were analyzed for 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging activity, reducing power assay (RPA) and ferric reducing antioxidant power (FRAP) assays respectively. The samples were also evaluated for tannin, phytic acid and flavonoid content which was then correlated with the antioxidant activity assayed using three methods. The results indicated that the bran rich fraction showed high antioxidant activity (RPA) owing to high tannin, phytic acid and flavonoid levels. Heat treatments exhibited significantly (P ≤ 0.05) higher antioxidant activity (DPPH scavenging activity and RPA) reflecting the high flavonoid content. Processing did not have any significant effect on the FRAP activity of pearl millet. The data on the correlation coefficient suggests that DPPH radical scavenging activity and reducing power assay in the K variety was largely due to the presence of flavonoid content, however in MRB, no relationship was found between antioxidant activities and antioxidant components.
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Claims 5
Claim · model-written summary
Heat treatments significantly increased antioxidant activity (DPPH scavenging activity and reducing power) of pearl millet flour.
- Taxon
- Pennisetum typhoideum
Cenchrus americanust0 - Treatment
- Heat treatmentse0
- Outcome
- antioxidant activity (DPPH scavenging activity and RPA)e0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heat treatments exhibited significantly (P ≤ 0.05) higher antioxidant activity (DPPH scavenging activity and RPA)”
t0“Pearl Millet (Pennisetum typhoideum)”
Claim · model-written summary
The bran rich fraction showed high antioxidant activity (RPA), associated with high tannin, phytic acid and flavonoid levels.
- Taxon
- Pennisetum typhoideumCenchrus americanust0
- Organ / stage
- bran rich fractione1
- Compound
- tannin, phytic acid and flavonoide1
- Outcome
- antioxidant activity (RPA)e1
- Direction
- highe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results indicated that the bran rich fraction showed high antioxidant activity (RPA) owing to high tannin, phytic acid and flavonoid levels”
t0“Pearl Millet (Pennisetum typhoideum)”
Claim · model-written summary
In the K variety, DPPH radical scavenging activity and reducing power were largely due to flavonoid content, per the correlation data.
- Taxon
- Pennisetum typhoideumCenchrus americanust0
- Material
- K varietye2
- Compound
- flavonoid contente2
- Outcome
- DPPH radical scavenging activity and reducing power assaye2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“DPPH radical scavenging activity and reducing power assay in the K variety was largely due to the presence of flavonoid content”
t0“Pearl Millet (Pennisetum typhoideum)”
Claim · model-written summary
In the MRB variety, no relationship was found between antioxidant activities and antioxidant components.
- Taxon
- Pennisetum typhoideumCenchrus americanust0
- Material
- MRBe3
- Outcome
- antioxidant activitiese3
- Direction
- no relationshipe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“however in MRB, no relationship was found between antioxidant activities and antioxidant components”
t0“Pearl Millet (Pennisetum typhoideum)”
Claim · model-written summary
Processing did not have a significant effect on FRAP activity of pearl millet.
- Taxon
- pearl milletCenchrus americanuse4
- Treatment
- Processinge4
- Outcome
- FRAP activitye4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Processing did not have any significant effect on the FRAP activity of pearl millet”
t0“Pearl Millet (Pennisetum typhoideum)”