Table 5.

Statistical analysis of the effects of pretreatment parameters on corn stover hydrolysis^a

	Glucose (hydrolysis)		Xylose (hydrolysis)		Glucose (overall)		Xylose (overall)
R2	0.951		0.966		0.914		0.939
Prob > F	< 0.0001*		< 0.0001*		< 0.0001*		< 0.0001*
Terms	Estimate	pvalue	estimate	pvalue	Estimate	pvalue	Estimate	pvalue
NaOH loading	6.417	< 0.0001*	5.084	< 0.0001*	5.962	< 0.0001*	2.987	< 0.0001*
Temperature	0.002	< 0.0001*	0.002	< 0.0001*	0.001	< 0.0001*	0.001	< 0.0001*
Time	0.0003	0.159	0.0003	0.0592	0.0002	0.336	9.604 × e-5	0.467
NaOH loading × temperature	−0.004	0.852	−0.052	0.0017*	−0.004	0.835	−0.042	0.0022*
NaOH loading × time	0.004	0.786	−0.006	0.594	0.0001	0.998	−0.003	0.743
Temperature × time	6.139 × e-6	0.663	6.798 × e-6	0.491	4.46 × e-6	0.763	3.804 × e-7	0.948
NaOH loading × NaOH loading	−26.181	0.263	−86.943	< 0.0001*	−43.260	0.086	−76.638	< 0.0001*
Temperature × temperature	−7.616 × e-5	0.0002*	−6.44 × e-5	< 0.0001*	−7.753 × e-5	0.0002*	−5.918 × e-6	< 0.0001*
Time × time	8.50 × e-6	0.411	−4.701 × e-6	0.514	5.53 × 10-6	0.628	3.898 × e-7	0.948

^a Numbers with asterisk indicate that the term has a significant effect at 95 % confidence interval.