Figure 3From: Biotransformation of caffeoyl quinic acids from green coffee extracts by Lactobacillus johnsonii NCC 533 Kinetics of the generation of caffeic acid (green diamond symbol) and 4-vinylcatechol (blue circle) from green coffee extract by L. johnsonii at 37&z.ousco;C. Variation of pH during reaction (red triangle symbol). Values are mean of three different experiments.Back to article page