. 2018 Nov 26;23(12):3083. doi: 10.3390/molecules23123083

Table 1.

IC₅₀ values (µM) of galangin and 3,5,7-trihydroxychromone in five antioxidant spectrophotometer assays.

Assays	Galangin	3,5,7-Trihydroxychromone	Trolox
^•O₂⁻ scavenging	108.7 ± 4.4 ^a	125.4 ± 4.9 ^b	4968.3 ± 157.8 ^c
DPPH^• scavenging	10.2 ± 0.3 ^a	134.1 ± 21.4 ^c	36.9 ± 1.0 ^b
PTIO^• scavenging	176.7 ± 24.3 ^b	395.1 ± 33.2 ^c	186.3 ± 7.2 ^a
Fe³⁺ reducing	22.9 ± 1.3 ^a	42.5 ± 1.6 ^b	21.5 ± 0.8 ^a
ABTS^+• scavenging	19.7 ± 0.1 ^a	20.9 ± 0.3 ^b	43.2 ± 1.7 ^c

The IC₅₀ value (in micromolar unit) was defined as the final concentration of 50% radical inhibition or relative reducing power, calculated by linear regression analysis, and expressed as the mean ± SD (n = 3). The linear regression was analyzed using the Origin 2017 Professional software. IC₅₀ values with different superscripts (a, b, or c) in the same row were significantly different (p < 0.05). Trolox was the positive control. The dose–response curves are listed in Supplement 1.