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. Author manuscript; available in PMC: 2011 Jul 1.
Published in final edited form as: React Funct Polym. 2010 Jul 1;70(7):433–441. doi: 10.1016/j.reactfunctpolym.2010.04.003

Fig. 1.

Fig. 1

Typical 1H NMR spectra of the sunflower oil-methanol mixtures at various degrees of transesterification attained with XL-PHMBG M2 as a catalyst. Signals corresponding to methyl ester and methylene located α to the carbonyl group in oil are designated “product” and “substrate”, respectively.