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Table 2 Concentrations of combined phenolic acids in synthetic media

From: Physiological mechanism of improved tolerance of Saccharomyces cerevisiae to lignin-derived phenolic acids in lignocellulosic ethanol fermentation by short-term adaptation

 Concentrations of phenolic acids in adaptation media (g/L)
Vanillic acidp-hydroxybenzoic acidSyringic acid
IC25a1.160.700.58
IC501.400.840.70
IC751.600.970.80
IC1001.901.140.95
  1. aIC25, IC50, IC75 and IC100 represented the synthetic media contained phenolic acids at inhibitory concentrations which could cause 25%, 50%, 75% and 100% inhibition on growth rate of the parental strain. The concentration of vanillic acid, p-hydroxybenzoic acid and syringic acid in the original mixture of phenolic acids was 2.5, 1.5 and 1.25 g/L and gradually diluted to different concentration level with the constant ratio shown as Table 1. A fitting curve of growth inhibition rate (GI) and dilution times was established based on the data of Table 1. The concentration of phenolic acids mixture led to 25%, 50% or 75% of growth inhibition was obtained by putting the growth inhibition rate of 25%, 50% and 75% into the equation of the fitting curve, respectively, and calculated the corresponding dilution times