Castanea sativa Mill. Flowers amongst the Most Powerful Antioxidant Matrices: A Phytochemical Approach in Decoctions and Infusions

Table 4

Antioxidant activity of decoctions and infusions of the flowers of two Castanea sativa cultivars.

Antioxidant activity (EC50 values, μg/mL)	Decoction judia	Decoction longal	Infusion judia	Infusion longal
DPPH scavenging activity	99.47 ± 0.006^b	100.04 ± 0.01^b	126.61 ± 0.005^a	133.56 ± 0.005^a
Reducing power	68.51 ± 0.001^d	76.07 ± 0.001^c	90.65 ± 0.001^b	98.79 ± 0.001^a
𝛽-carotene bleaching inhibition	47.89 ± 0.002^d	184.92 ± 0.001^b	177.23 ± 0.004^c	195.10 ± 0.01^a
TBARS inhibition	38.73 ± 0.001^b	48.63 ± 0.000^a	15.24 ± 0.002^d	19.79 ± 0.003^c

EC₅₀ values correspond to the sample concentration achieving 50% of antioxidant activity or 0.5 of absorbance in the reducing power assay. In each row different letters mean significant differences with a 𝑃<0.05. They refer to Tukey’s post hoc test; therefore, significant different values were classified using letters in alphabetic order.