Table 3. Water-insoluble solid residue (WIS) and residual ratio of each component pretreated with Liriodendron tulipifera depending on the temperature (based on each initial content in unpretreated L. tulipifera)

Temp. (°C)	WIS (%)	Structural sugars (%)			Lignins (%)			Total (g)
		Glucan	Xylan	Total	Klason lignin	Acid soluble lignin	Total
Unpret.	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
120	92.1 ± 0.1	100.0 ± 0.2	100.0 ± 1.0	100.0 ± 0.7	87.1 ± 0.4	89.8 ± 0.4	87.4 ± 0.3	97.8 ± 0.5
130	83.1 ± 1.0	96.6 ± 0.7	78.7 ± 0.2	90.7 ± 1.2	77.0 ± 0.6	78.8 ± 0.2	77.2 ± 0.2	86.8 ± 0.6
140	75.6 ± 1.5	97.3 ± 0.3	58.1 ± 0.5	84.4 ± 0.6	69.1 ± 0.3	64.4 ± 0.6	68.4 ± 0.5	79.8 ± 0.6
150	60.0 ± 1.2	94.9 ± 0.5	28.3 ± 0.1	72.9 ± 0.5	43.8 ± 0.4	33.0 ± 0.3	42.3 ± 0.1	64.1 ± 0.3
160	51.9 ± 1.9	94.0 ± 0.5	16.6 ± 0.3	68.5 ± 0.2	31.4 ± 0.1	17.2 ± 0.2	29.4 ± 0.4	57.2 ± 0.3
170	44.1 ± 1.6	90.2 ± 0.7	5.0 ± 0.2	62.1 ± 0.4	20.4 ± 0.2	10.8 ± 0.4	19.0 ± 0.2	49.7 ± 0.3
180	40.0 ± 0.6	84.1 ± 0.4	0.0 ± 0.0	56.4 ± 0.3	19.1 ± 0.5	11.4 ± 0.1	18.0 ± 0.5	45.3 ± 0.4