Sponsored by antibiotic. A substance produced by bacteria or fungi that destroys or prevents the growth of other bacteria and fungi. Antibiotics are not effective against viruses. A small, naturally occurring protein produced by one species of bacterium that effectively protects it from competing organisms.
Different bacteria produce different bacteriocins.
The breakdown of organic molecules into simpler substances in the absence of oxygen. The process of fermentation can give rise to acids producing a lower pH. gamma rays. The shortest wavelength of electromagnetic radiation. The acid strength in the human stomach is about pH 2. Caustic soda and basic household cleaners have a pH of about 12 to 14.