Table 1.
Steam explosion conditions, calculated severity factor and yield of ethanol extract

Sample	Temperature (℃)	Time (min)	Severity factor (Ro)a
1	160	5	2.5
2	180	5	3.1
3	180	10	3.4
4	180	15	3.5
5	200	5	3.6
6	200	10	3.9
7	200	15	4.1
8	220	5	4.2
9	220	10	4.5
10	220	15	4.7
11	240	15	5.3

Severity factor (Ro) = {t × exp [(T-100)/14.75]}. T is the temperature (°C) and t is the duration of treatment (min) (Overend and Chornet, 1987)
Based on water-washed, exploded wood fibers.