In vitro free radical scavenging activity of Ixora coccinea L

In vitro antioxidant activities of Solanum surattense leaf extract

“…The decrease in absorbance of DPPH caused by antioxidants is due to the reaction between antioxidant molecules and radical, which results in the scavenging of the radical by hydrogen donation. Similar results have been reported by many authors [24,25] .…”

Antioxidant activity and total phenolic content of methanol extracts ofIxora coccinea

“…Table 1 shows the total phenolic contents where the highest amount was found in the flower (210.55 ± 6.31 µg/ mg) followed by the leaf (180.56 ± 1.27 µg/mg) and stem (100.31 ± 4.63 µg/mg) extracts. The presences of phenols content in the flower is consistent with the studies reported by Saha et al (2008). A preliminary phytochemical screening revealed that the flower extract of I. coccinea possessed flavonoids and tannins.…”

“…The IC 50 values of the leaf, flower and stem extracts were 26.5, 31.3, and 36.7 μg/mL, respectively, and a moderate coefficient of correlation value was noted between the phenolic content of the extracts and the xanthine oxidase antioxidant activity (R 2 = 0.5234). In the DPPH assay IC 50 value of the flower extract was reasonably higher (6.6 mg/mL) when compared to that (IC 50 : 0.1 mg/mL) reported by Saha et al (2008). This difference in the IC 50 could be possibly due to the different methods of extraction of the flower.…”

“…This difference in the IC 50 could be possibly due to the different methods of extraction of the flower. Saha et al (2008) used heat Soxhlet extraction while the present study utilized maceration procedures. Maceration has generally been reported to give lower yields of plant extracts due to its insolubility at room temperature compared to Soxhlet extraction (Ibrahim et al, 1997).…”

“…Studies on the antioxidant activity of I. coccinea are scarce except for a recent work which showed high antioxidant properties of the flower extract. This was attributed to the high amount of hydrophilic phenolic compounds found in the flower (Saha et al, 2008). In view of this, we report the TPC (total phenolic content) and AOA (antioxidant activity) of the flower, leaf, and stem of I. coccinea.…”