. 2022 Jul 26;11(15):2216. doi: 10.3390/foods11152216

Table 6.

The content of polyphenolic compounds in grapevines hybrids skin, juice and pulp.

Variety	Fruit Fraction	Anthocyanins [mg/1 kg]	Flavonols [mg/1 kg]	Phenolic Acids and Stilbenes [mg/1 kg]	Flavan-3ols [mg/1 kg]	Total Polyphenols [mg/1 kg]
Michigan	skin	nd	64.48 ± 6.13 ^a	33.96 ± 3.75 ^b	37.62 ± 0.48 ^g	136.06 ± 10.36 ^d
	juice	nd	8.37 ± 0.02 ^d	2.56 ± 0.07 ^h	8.82 ± 0.04 ^k	19.75 ± 0.13 ^j
	pulp	nd	nd	2.68 ± 0.06 ^h	16.48 ± 0.98 ^j	19.16 ± 1.04 ^j
Minnesota	skin	11.15 ± 2.42 ^bc	15.69 ± 1.01 ^c	21.50 ± 0.93 ^c	125.02 ± 8.52 ^c	173.36 ± 12.88 ^c
	juice	nd	nd	0.45 ± 0.09 ^k	22.27 ± 0.10 ⁱ	22.72 ± 0.19 ⁱ
	pulp	nd	nd	2.27 ± 0.00 ⁱ	40.75 ± 1.07 ^f	43.02 ± 1.07 ^g
V 68021	skin	nd	8.47 ± 0.38 ^d	16.89 ± 1.12 ^d	158.81 ± 6.27 ^b	184.18 ± 7.77 ^c
	juice	nd	nd	2.56 ± 0.24 ^h	27.41 ± 1.33 ^h	29.97 ± 1.57 ^h
	pulp	nd	nd	3.38 ± 0.61 ^g	85.73 ± 1.41 ^d	89.11 ± 2.02 ^e
Beta	skin	716.57 ± 11.03 ^a	nd	11.21 ± 0.61 ^e	86.83 ± 4.15 ^d	814.61 ± 15.79 ^b
	juice	8.51 ± 1.02 ^c	nd	5.35 ± 0.46 ^f	47.15 ± 4.10 ^e	61.01 ± 5.59 ^e
	pulp	nd	nd	5.43 ± 0.73 ^f	46.61 ± 0.75 ^e	52.04 ± 1.48 ^f
Alwood	skin	728.83 ± 9.21 ^a	38.81 ± 1.32 ^b	43.87 ± 1.96 ^a	205.00 ± 11.11 ^a	1016.52 ± 23.60 ^a
	juice	14.47 ± 0.32 ^b	4.92 ± 0.03 ^e	4.49 ± 0.79 ^f	25.15 ± 2.11 ^h	49.03 ± 3.25 ^fg
	pulp	nd	nd	2.09 ± 0.04 ^j	41.49 ± 1.91 ^f	43.58 ± 1.95 ^g

nd—not detected. Lower-case letters mean values in the columns significantly different at p ≤ 0.05.