Optimization by Response Surface Methodology of Biodiesel Production from Podocarpus falcatus Oil as a Cameroonian Novel Nonedible Feedstock

Table 4

ANOVA results for biodiesel yield and viscosity.

Source	Viscosity				Yield
	Sum of squares	Df	-ratio		Sum of squares	-ratio
(temperature)	0.4802	1	10.73	0.0220	6.09005	2.33	0.1878
(reaction time)	0.0968	1	2.16	0.2012	14.9605	5.71	0.0624
(molar ratio)	3.2258	1	72.11	0.0004	0.2312	0.09	0.7783
	0.0072	1	0.16	0.7048	3.20493	0.63	0.4645
	0.4225	1	9.44	0.0277	52.7076	20.13	0.0065
	0.0225	1	0.50	0.5099	4.9729	1.90	0.2267
	0.0022	1	4.53	0.8349	50.4567	19.27	0.0071
	0.2025	1	4.53	0.0867	56.7009	21.65	0.0056
	0.2385	1	5.33	0.0690	20.4197	7.80	0.0383
Total error	0.2237	5			13.0942
					;

Significant at 95% confidence interval.