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. Author manuscript; available in PMC: 2018 Feb 3.
Published in final edited form as: J Org Chem. 2017 Jan 18;82(3):1316–1329. doi: 10.1021/acs.joc.6b02161

Figure 2.

Figure 2

Summary of dentin bioassay results used to prioritize the primary fractions of P. massoniana extract. (A) Fold increase (FI) in the apparent modulus of elasticity of the fractions normalized to the FI of crude pine extract. The FI was calculated as the FI ratio after vs before treatment (final vs base value). The weight distribution of the fractions (B; % w/w) and the weight-normalized FI contributions (C) show that both the monomeric and polymeric PACs are abundant but ineffective, whereas certain OPAC fractions (14–26, 29) contain the main dentin bioactive principles of pine bark.