Fig. 1

3D surface plot of MRS showing interactive effect of a solvent volume and extraction time on T. peruviana oil yield % (v/v); b extraction time and sample weight on T. peruviana oil yield % (v/v); c solvent volume and sample weight on T. peruviana oil yield % (v/v). d 3D surface plot of ANN showing interactive effect of sample weight (SW) and extraction time (ET) on T. peruviana oil yield % (v/v); e sample weight (SW) and solvent volume (SV) on T. peruviana oil yield % (v/v); f solvent volume (SV) and extraction time (ET) on T. peruviana oil yield % (v/v)