Figure 2

Model results. A) Plot of the actual logarithmic yields against the logarithmic yields generated by the regression model. The line drawn as diagonal to the plot is one-to-one and passes through the origin. The data points have an R² value of 0.55. B) Plot of residuals against fitted values. C) Model validation using newly published data (2010~2011) 1 - β-amyrin[22]; 2 - ascorbic acid [23]; 3 - monoterpene [24]; 4 - vanillin [25]; 5 - succinic acid [26].