Table 4.

Mean of the concentration expressed as mg/g of the ellagitannins found in woods of different botanical origin after toasting.

Heat Treat	Species	Seasoning Time	Monomers		Pentosylated Monomers		Dimers		Pentosylated Dimers		Total	% Monomers **	Ratio
			Castalagin	Vescalagin	Roburin E	Granidinin	Roburin A	Roburin D	Roburin B	Roburin C
160–170 °C 20 min	Alternative Woods
	Q. pyrenaica (E) [23]	NS, 24m	15.2	14.62	8.8	4.51	ns	2.53	ns	ns	45.66	65	1
	Q. pyrenaica (H) [23]		19.74	11.37	12.37	3.57	ns	nd	ns	ns	47.05	66	1.7
	Q. pyrenaica (E) [16]	NS, 36m	2.77	0.37	1.66	0.42	0.41	0.38	0.21	0.15	6.37	49	7.5
	Q. faginea (A) [16]		4.68	0.96	2.27	nd	0.24	0.8	0.25	0.14	9.34	60	4.9
	Traditional Quercus
	Q. petraea Matts. [23]	NS, 24m	22.76–20.10	17.61–12.62	10.68–2.42	4.34–2.10	ns	1.37–0.70	ns	ns	56.76–37.94	86–71	1.6–1.3
	Q. alba L. [23]		0.44–0.37	5.28–1.23	0.17–nd	nd	ns	nd	ns	ns	5.89–1.60	100–97	0.3–0.1
	Q. petraea Matts. [16]	NS, 36m	3.79–1.75	1.02–0.36	2.23–0.75	0.59–0.13	0.50–0.20	0.44–0.16	0.22–0.10	0.17–0.08	8.96–3.53	60–54	4.9–3.7
	Q. robur L. [16]		5.44–3.60	1.15–0.89	2.39–1.80	0.66–0.28	0.47–0.41	0.50–0.45	0.20–0.17	0.19–0.12	11.00–7.72	58–60	4.7–4.0
	Q. alba L. [16]		nd	nd	nd	nd	nd	nd	nd	nd	nd	nd
160–170 °C 30 min	Alternative woods	NS, 24m
	Q. pyrenaica (G) [25]		1.7	0.62	0.46	0.41	0.32	0.34	0.27	0.2	4.32	54	2.7
	Castanea sativa (C) [25]		4.59	4.32	1.09	0.15	0.22	0.06	0.06	0.02	10.51	85	1.1
165 °C 35 min	Alternative woods	NS, 24m
	Castanea sativa (B) [15]		6.56	1.03	0.88	0.96	0.33	0.4	ns	ns	10.15	75	6.4
Medium Intensity	Alternative woods	NS
	Q. pyrenaica (I) [7]		4.07	3.22	ns	ns	ns	ns	ns	ns	7.29	ns	ns
	Robinia p. (A) [7]		nd	nd	ns	ns	ns	ns	ns	ns	ns	ns	ns
	Prunus avium (B) [7]		nd	nd
	Traditional Quercus
	Q. petraea Matts. [7]		3.12	2.4	ns	ns	ns	ns	ns	ns	5.52	ns	ns
	Q. alba L. [7]		0.68	0.78	ns	ns	ns	ns	ns	ns	1.46	ns	ns
185 °C 45 min	Alternative woods	NS, 24m
	Castanea sativa (B) [15]		0.55	0.11	nd	nd	nd	nd	ns	ns	0.66	100	5
200 °C 140 min	Alternative woods	oven 0% IH
	Q. humboldtti (A) [13]		0.03	0.01	0.01	0.03	0.00*	0.04	0.00*	0.00	0.12	33	3
	Traditional Quercus	NS, 30m
	Q. petraea Matts. [13]		3.34–1.98	1.46–0.87	0.30–0.16	0.31–0.09	0.24–0.14*	0.38–0.18	0.24–0.14*	0.04–0.03	5.83–3.68	82–77	2.3
	Q. alba L. [58]		0.35	0.08	0.02	0.04	0.02*	0.04	0.02*	0.01	0.56	77	4.38
250–260 °C 27 min	Alternative woods	NS, 24m
	Q. pyrenaica (G) [23]		7.72	4.81	nd	0.85	ns	nd	ns	ns	13.38	94	1.6
	Q. pyrenaica (H) [23]		17.69	4.9	4.99	1.75	ns	nd	ns	ns	29.33	77	3.6
	Traditional Quercus
	Q. petraea Matt. [23]		11.60–3.93	12.33–6.52	nd	1.26–1.14	ns	nd	ns	ns	25.19–11.59	90–95	0.9–0.6
	Q. alba L. [23]		0.35–0.21	5.07–0.69	nd	nd	ns	nd	ns	ns	5.42–0.90	100	0.5–0.0

Q. pyrenaica Willd. from: (E) Álava; (G) Gerês forest of Portugal; (H) Guarda forest of Portugal; (I) Portugal. Q. faginea Lam. from: (A) Álava. Castanea sativa Mill. from: (B) France; (C) Gerês forest of Portugal. Robinia pseudoacacia L. (A). Prunus avium from: (B) central France. Q. humboldtti Bonpl. from: (A) Colombia. NS: Natural seasoning, m: months, ns: not studied compound; nd: not detected; * A and B were evaluated together ** % of the monomers in the total ellagitannins; castalagin/vescalagin ratio. IH: Internal humidity. The number superscript in the second column is the reference.