faecal bacteria
Faecal bacteria (e.g. Escherichia coli) is taken to mean all microorganisms populating the guts of animals or humans, whose presence therefore indicates contamination by either excrement or products of fermentation or decay.
F
facultative
non-obligatory
FEP
[Abbr. for fluorinated ethylene propylene (perfluoroethylene propylene copolymer)] – FEP is a hydrophobic fluoroelastomer with a high resistance to heat and chemicals.
FDA
[Abbr. for Food and Drug Administration] - The FDA is the American federal agency responsible for food monitoring and drug licensing. It is subordinate to the Department of Health and Human Services.
fluoroplastics
The term fluoroplastics describes polymers manufactured from fluorine (F) and carbon (C). Typical fluoroplastics are FEP and PTFE, which are known under the brand name Teflon. Fluoroplastics have a very high resistance to chemicals and intense UV radiation. They also retain good UVC transparency at thin layer thicknesses.
FPM
[Abbr. for fluoropolymer permeable membrane (fluoropolymer rubber)] - FPM is a fluorinated elastomer with very high ozone-, weather- and UV-resistance.
fungal spores
See spores.
fungicide
Chemical or biological agent for destroying fungal spores und moulds.