Antioxidant Capacity and Proanthocyanidin Composition of the Bark of Metasequoia glyptostroboides

Table 1

The contents of total phenolic, flavonoid, and proanthocyanidin in the extracts and fractions from the bark of M. glyptostroboides.

Samples	Yield of extract (%)	Total phenolics (mg GAE/g)	Total flavonoids (mg RE/g)	Total proanthocyanidins (mg PE/g)
MGW	6.9	184.8±0.4^e	317.3±2.8^e	26.8±1.6^e
MGE60	10.1	305.2±1.3^c	433.5±2.8^b	348.9±2.6^c
MGE95	7.0	384.6±0.5^b	356.7±2.8^c	404.6±12.6^b
MGEA	1.4	50.2±3.1^f	40.6±4.2^f	1.5±0.1^f
MGEB	3.4	716.7±8.2^a	823.4±5.6^a	627.5±8.7^a
MGEC	0.4	274.4±0.6^d	339.0±2.8^d	56.3±1.1^d

Values of contents are mean ± standard deviation of three replicate analyses. Means with different letters (a–f) within the same column differed significantly (𝑃<0.05) and are arranged in the following contents descending order: a > b > c > d > e > f.