Ribonuleic acid macroattention Introduction. MATRIX ACID - see Information acid. * 4.8. Matrix microbes. Microorganisms that metabolize any organic and inorganic substances to final products and produce matrix acid as an additional product. These include all non-metabolic euarchaeates, which differ micromorphologically from “ordinary” bacteria in the presence in the cells of columnar formations 2–9 µm wide and 0.3–0.6 µm in diameter, usually located