Distribution of Phenolic Acids and Antioxidant Activities of Different Bran Fractions from Three Pigmented Wheat Varieties

Table 2

The content (μg/g defatted bran) of bound phenolic acids in the bran fractions of three pigmented wheat varieties.

Phenolic acids	Blue wheat			Black wheat			Purple wheat
	Outer bran	Coarse bran	Shorts	Outer bran	Coarse bran	Shorts	Outer bran	Coarse bran	Shorts
Gallic acid	nd	nd	nd	nd	nd	nd	nd	nd	nd
Protocatechuic acid	nd	nd	nd	nd	nd	nd	nd	nd	11.77 ± 1.29
p-Hydroxybenzoic acid	12.81 ± 0.57	14.95 ± 0.39	12.60 ± 0.18	15.56 ± 0.66	19.57 ± 1.13	16.07 ± 0.23	25.29 ± 1.67	18.01 ± 0.50	12.68 ± 0.30
Vanillic acid	19.47 ± 2.44	8.96 ± 0.67	7.12 ± 0.32	32.18 ± 3.14	13.36 ± 2.60	9.00 ± 0.33	107.18 ± 8.68	31.40 ± 1.52	12.49 ± 0.95
Syringic acid	33.99 ± 2.50	18.57 ± 3.41	21.78 ± 0.31	32.37 ± 3.34	22.18 ± 4.07	17.49 ± 5.53	85.88 ± 13.05	41.53 ± 3.57	28.68 ± 0.77
p-Coumaric acid	112.31 ± 11.42	75.26 ± 3.38	64.04 ± 1.20	89.87 ± 5.14	85.88 ± 5.85	73.00 ± 2.86	87.58 ± 4.31	76.82 ± 1.93	52.24 ± 2.72
Ferulic acid	2467.47 ± 82.55	2336.69 ± 60.50	1948.56 ± 28.46	1251.72 ± 24.84	1810.91 ± 32.66	1611.53 ± 72.25	1316.92 ± 36.29	2753.67 ± 51.27	1499.20 ± 47.40
Isoferulic acid	277.21 ± 14.42	157.97 ± 10.25	151.63 ± 3.73	242.23 ± 21.07	220.82 ± 15.40	206.12 ± 9.33	189.43 ± 10.59	156.21 ± 4.13	113.65 ± 6.37
Salicylic acid	535.45 ± 15.18	nd	nd	906.02 ± 28.66	nd	nd	540.27 ± 36.68	nd	nd
Total phenolics (HPLC)	3458.71	2612.38	2205.73	2569.95	2172.73	1933.21	2352.55	3077.63	1730.71