Biodiesel 1 Biodiesel synthesis 1 Catalyst activity 1 Chlorine compounds 1 Energy utilization 1 Esters 1 Fatty acids 1 Fatty acids methyl esters 1 Hydroxy fatty acid methyl ester 1 Hydroxy fatty acids 1 Lesquerella 1 Lesquerella fendleri oil 1 Lesquerellum fendleri oil Lewis acid catalysts 1 Light absorption 1 Molar ratio 1 Nuclear magnetic resonance 1 Nuclear magnetic resonance spectroscopy 1 Organic solvents 1 Regression analysis 1 Solid Lewis acid 1 Spectroscopic analysis 1 Thermogravimetric analysis 1 Tin compounds 1 Transesterification 1 Transesterifications 1 Ultrasonics 1 Ultrasound 1 ]+ catalyst 1