Ключевые слова: 4hydroxybenzoic acid, chemical, chemistry, close up, closeup, colorful, crystal, detail, exploration, full frame, light, macro, magnification, methyl ester, methyl paraben, methylparaben, microcrystal, micrograph, micrography, microscopic, microscopy, naoh, paraben, polarised, polarized, polarized light, refraction, research, scholarship, science, thin, translucent,