Table 3. Pyrolysis-GC/MS analysis of suberin extracted from Quercus variabilis and Quercus suber

	Q. variabilis		Q. suber
	Republic of Korea	China	Portugal	Italy
Aliphatics	98.62^a	103.42^a	88.89^a	161.1^b
Alkanes	22.96	56.71	15.92	23.65
Other alkanes	5.16	21.42	-	5.90
α-alkenes	49.19	17.88	13.09	-
Other alkenes	7.56	4.59	49.17	112.29
Alkadienes	13.75	2.82	10.71	19.26
Aromatics	46.78	63.34	18.56	43.34
Phenolic	17.05	13.56	9.26	18.09
Non-phenolic	29.73	49.78	9.30	25.25
Others	25.05	72.42	24.49	102.43

Data represent median values (mg g^–1) for various compound types, including alkanes, alkenes, alkadienes, and aromatic compounds.
Values are expressed as median values.
Different superscript letters indicate statistically significant differences among species groups (p < 0.05, Kruskal-Wallis test followed by hierarchical clustering).
GC/MS: gas chromatography/mass spectrometry.