Gold Book Terms - F
f number f-functional branch point f-functional branch unit fabric filter fac- factor factor-group splitting fall time fallout in atmospheric chemistryfanning in atmospheric chemistryfarad faradaic current faradaic current density faradaic demodulation current faradaic rectification current Faraday constant Faraday cup collector fast atom bombardment ionization fast neutrons fast-atom bombardment (FAB) mass spectroscopy fatigue of a photochromic systemfatty acids feed rate in catalysisfeed-back inhibition in biotechnologyfeedback in analysisfeedback in kineticsfemto fenestranes Fenton reaction fermentation fermenter fermi Fermi energy Fermi level \(E_{\text{F}}\)fermion feromone ferredoxin ferrimagnetic transition ferrocenophanes ferroelastic transition ferroelectric (antiferroelectric) transition ferroelectric polymer ferroic transition ferromagnetic polymer ferromagnetic transition fertile in radioanalytical chemistryfibrillar morphology fibrous activated carbon fibrous carbon fibrous crystal in polymers in polymersfiducial group field desorption in mass spectrometryfield effect field effect phototransistor field ionization in mass spectrometryfield level filamentous carbon filler filler coke filling solution of a reference electrodefilm film badge in radioanalytical chemistryfilm element film tension filter filter of a radiationfilter spectrometer filtration fine structure constant \(\alpha\)first-order phase transition first-pass effect Fischer projection Fischer–Rosanoff convention Fischer–Tollens projection fissile of a materialfission fragment ionization in mass spectrometryfission fragments fission neutrons fission products fission yield fissionable fixed ions fixed neutral loss (gain) scan in mass spectrometryfixed neutral loss (gain) spectrum in mass spectrometryfixed precursor ion scan in mass spectrometryfixed product ion scan in mass spectrometryfixed product ion spectrum in mass spectrometryflagpole flame ionization detector in gas chromatographyflame photometric detector in gas chromatographyflame photometry flame-in-tube atomizer in spectrochemical analysisflammable limits flash fluorimetry flash lamps flash photolysis flash point flash vacuum pyrolysis flat band potential (at a semiconductor/solution interphase) flat bands flavins flavonoids (isoflavonoids and neoflavonoids) flavoproteins flavylium salts floating monolayer floc flocculation floccule Flory–Huggins theory flotation flow analysis flow birefringence flow enthalpimetry flow injection flow injection enthalpimetry flow rate in chromatographyflow rate in flame emission and absorption spectrometryflow rate of a quantityflow rate of unburnt gas mixture in flame emission and absorption spectrometryflow reactor flow resistance parameter \(\mathit{\Phi}\) in chromatographyflow-programmed chromatography flue gas in atmospheric chemistryflue gas scrubber in atmospheric chemistryfluence rate \(E_{\unicode{x26ac}}\)fluence \(F\),\(\varPsi \),\(H_{0}\)fluid coke fluidity \(\phi\)fluidized bed fluoresceins fluorescence fluorescence error in spectrochemical analysisfluorescence excitation of X-raysfluorescence lifetime fluorescence resonance energy transfer fluorescence yield fluorimeter fluorocarbons fluorogenic fluorohydrins fluorophore flux depression flux \(J_{\text{X}}\) of a quantityfluxional fly ash in atmospheric chemistryfoam foam fractionation foaming agent fog fog horizon in atmospheric chemistryfolates fold domain in polymer crystalsfold in polymer crystalsfold plane in polymer crystalsfold surface in polymer crystalsfolded-chain crystal in polymersfoot forbidden line in X-ray spectroscopyforce constants force-field calculation force \(F\)foreign-gas broadening formamidine disulfides formation constant formazans Förster cycle Förster excitation transfer Förster-resonance-energy transfer forward scattering fossil fuel fouling agent in catalysisfouling in membrane processesFourier transform ion cyclotron resonance (FT-ICR) mass spectrometer Fourier transform spectrometer Fourier-transform spectroscopy fractal agglomerate fractal dimension \(d\)fraction fraction collector in chromatographyfraction extracted \(E\)fractional change of a quantity fractional selectivity in catalysisfractionation of analytesfractionation of polymersfragment ion in mass spectrometryfragmentation fragmentation reaction in mass spectrometryframe-shift mutation Franck–Condon principle Franck–Condon state franklin free charge density on the interface free electron laser free energy free radical free rotation free spiro union free-running laser freely draining freely jointed chain in polymersfreely rotating chain in polymersfreezing freezing out in atmospheric chemistryfrequency distribution frequency doubling frequency-domain fluorometry frequency \(f\),\(\nu \)frequency \(\nu\),\(\omega\) in photochemistryFRET friction coefficient friction factor \(\mu\)frictional coefficient \(f\) in polymer chemistryfringed-micelle model in polymer crystalsfront surface geometry in luminescencefrontal chromatography frontier orbitals fronting in chromatographyfrost point hygrometer froth flotation Frumkin effect fucolipid fuel cycle (nuclear) fuel element (nuclear) fuel reprocessing (nuclear) fugacity coefficient \(\phi\)fugacity \(f\),\(\tilde{p}\)fulgides full energy peak fullerenes fulminates fulvalenes fulvenes fume in atmospheric chemistryfumes fumigation in atmospheric chemistryfunctional class name functional group functional parent functional polymer functionality \(f\) of a monomerfungicide furanocoumarins furanoses furnace black furnace pyrolysis in spectrochemical analysisfurocoumarins fusion in biotechnologyfusion name FWHM (Full Width at Half Maximum)