Total phenolic content and antioxidant activity of three Iranian endemic Achillea species

Inhibitory effect of different fennel ( Foeniculum vulgare ) samples and their phenolic compounds on formation of advanced glycation products and comparison of antimicrobial and antioxidant activities

“…The lowest and the highest IC 50 values belonged to En and Te1 samples, respectively. The differences of IC 50 among extracts could be ascribed to variation in polyphenolic compounds of the analyzed extracts (Gharibi et al, 2013). Mata et al (2007) showed that shoots and leaves possessed strong antioxidant activity (>90% at 20 mg/ml) while, in the present research, the most effective antioxidant activity was found in seed extracts.…”

“…This can be explained by the phenomenon of "polar paradox," in which polar antioxidants remaining in the aqueous phase of the emulsion are more diluted in the lipid phase. So, they are less effective in protecting the linoleic acid (Gharibi et al, 2013). The BHT probably possessed greater polarity than did the methanolic extracts of fennel and therefore, showed lower activity in quenching free radicals in the oil phase of beta-carotene/linoleic acid.…”

“…Mata et al (2007) showed that shoots and leaves possessed strong antioxidant activity (>90% at 20 mg/ml) while, in the present research, the most effective antioxidant activity was found in seed extracts. Gharibi et al (2013) reported that phenolic compounds were stronger DPPH·-scavengers than were flavonoids. HPLC results revealed that chlorogenic and 1, 5-dicaffeoylquinic acid were the most abundant phenolic compounds of the Kh1 sample.…”

Evaluation of seven different drying treatments in respect to total flavonoid, phenolic, vitamin C content, chlorophyll, antioxidant activity and color of green tea (Camellia sinensis or C. assamica) leaves

“…Bars with different letters are significantly different mechanisms (Yildirım et al 2000). For example, DPPH assay is mostly attributed to such phenolic compounds that participate in scavenging free radicals, while in reducing power the inactivation of the metal ions such as ferric ions is evaluated by phenolics (Gharibi et al 2013). …”

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“…High variation of phenolic compounds content and antioxidant capacity among the studied and the cited taxa, whether collected from the same or different geographical region, was observed in the present study. Altitude and temperature have been shown to be one of the major environmental factors affecting plant composition and properties, despite genetic differences among various species 16 CONCLUSION: This is the first study to assess TPCs and antioxidant capacity in the capitula of the 41 Anthemideae taxa from Turkey. Strong correlations and linear regressions between antioxidant capacity values and TPC or TF contents identified phenolic compounds as the main carriers of antioxidant capacity in the present taxa belonging to different seven genera.…”