Nanofiltration

A type of membrane filtration that allows the separation of molecules with a diameter greater than 1 nm.

Napalm

Gelling agent, originally made up of sodium palmitate and now aluminum palmitate. Due to inflammation it develops an intense heat, it is capable of charring everything in a vast radius of action.

Ecological niche

Functional role played by an organism in the ecosystem.

Emission standard

Any authorization of discharge of a substance that includes: the concentration and the maximum quantity.

Quality functional standard

When it comes to the environment, it is the standard that is required so that a certain function can be fulfilled.

Ambient air quality standards

Ambient air quality defined statistically by a limit on the concentration of a pollutant in a specified average period.

NTEL

Acronyms indicative of: level without toxic effect.