Investigation of Cinnamaldehyde Derivatives as Potential Organic UV Filters

Figure 2

A representative bacterial growth spot assay on a tryptic soy agar culture plate imaged with epi illumination at 365 nm. 5 μL of mixtures were spotted down columns 1, 2, 4, and 5 with the highest concentration at dilution 1 and the lowest concentration at dilution 7. (a) Column 1 was P. aeruginosa with TB (TB+); column 2 was P. aeruginosa with DMSO (DMSO+); column 3 was dissolved UV compound in DMSO without bacteria (UV compound + DMSO−); column 4 was P. aeruginosa with UV compound in DMSO (UV compound + DMSO+); and column 5 was P. aeruginosa with kanamycin antibiotic (kanamycin+). (b) Representative microscopic imaging of UV filter residue physically occupying tryptic soy agar surface.

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