nanometer
The unit nm. Conversion: 1 nm = 0.000000001 m or 0.001 µm. By way of comparison, a human hair has a diameter of approx. 100 µm.
N
NBR
[Abbr. for nitrile butadiene rubber] - NBR is a heat-resistant synthetic rubber. It is particularly resistant to petroleum products such as fuel and lubricating oil, petrol and petroleum.
Norovirus
Noroviruses (Norwalk Viruses in full) are non-enveloped viruses with single-stranded RNA. They have an extremely high contagiousness, and infection leads to acute gastoenteritis (gastric flu). Hospitals as well as old-age or nursing homes are particularly vulnerable to repeated epidemic norovirus outbreaks.
nosocomial infection
A nosocomial infection refers to an infection contracted in a hospital or care institution.