Anesthesia, also known as anaesthesia, is a medical procedure that aims to render a patient unconscious, insensible to pain, and immobile during surgical or medical procedures.

A catalytic converter is a device used in the exhaust system of a vehicle to reduce the emission of harmful pollutants.

Electronics is the science and technology of studying, designing, and manufacturing devices that use the flow of electrons to perform electrical functions.

Fermentation is a metabolic process that converts sugar into acids, gases, or alcohol.

Fluorescence is a phenomenon in which certain atoms or molecules absorb and then re-emit light of a different, usually longer, wavelength.

Hydrogen production is the process of generating hydrogen gas, which is a clean and efficient energy carrier.