Synthesis of Cellulose Nanocrystals (CNCs) from Brewer’s Spent Grain Using Acid Hydrolysis: Characterization and Optimization

Table 3

ANOVA for quadratic regression model.

Source	SS	DF	MS	value	value
Model	191.58	14	13.68	75.17	<0.0001	Significant
A-X1	1.07	1	1.07	15.85	0.0340
B-X2	3.29	1	3.29	18.09	0.0014
C-X3	2.07	1	2.07	11.39	0.0062
D-X4	4.74	1	4.74	26.05	0.0003
AB	0.3108	1	0.3108	21.71	0.0180
AC	1.39	1	1.39	17.62	0.0186
AD	1.04	1	1.04	15.69	0.0362
BC	3.30	1	3.30	18.14	0.0013
BD	6.250-06	1	6.250-06	25.00	0.00954
CD	0.7613	1	0.7613	14.18	0.0456
A^2	13.55	1	13.55	74.42	<0.0001
B^2	5.99	1	5.99	32.93	0.0001
C^2	7.19	1	7.19	39.47	<0.0001
D^2	2.66	1	2.66	14.64	0.0028
Residual	2.00	11	0.1821
Lack of fit	2.00	10	0.2000	81.64	0.0859	Not significant
Pure error	0.0025	1	0.0025
Total	193.58	25