Gold Book Terms - E
E, Z E/Z photoisomerization early-downhill surface eclipsed (eclipsing) eclipsing conformation eclipsing strain ectohormone eddy eddy dispersion educt effective cadmium cut-off energy in nuclear analytical chemistryeffective charge effective chimney height effective half life effective molarity effective theoretical plate number of a chromatographic columneffective thermal cross-section effective thickness of diffusion layer effectively infinite thickness in flame spectroscopyeffectiveness effector efficiency of a counterefficiency of atomization in analytical flame spectroscopyefficiency of nebulization \(\varepsilon_{\text{n}}\) in flame spectrometryefficiency spectrum efficiency \(\eta\) of a stepefflorescence effluent effluent in chromatographyeicosanoids eighteen-electron rule einstein Einstein equation El-Sayed rules elastic collision elastic scattering in reaction dynamicselastic scattering in spectrochemistryelastically active network chain elastomer electric capacitance electric charge \(Q\)electric coherence length \(\xi_{\text{E}}\) in thin filmselectric conductance \(G\)electric conductivity electric current density \(j\)electric current \(I\)electric dipole moment \(p\)electric displacement \(D\)electric field (strength) \(E\)electric mobility \(u\),\(\mu \)electric polarizability \(\alpha\)electric potential difference \(\Delta V\) of a galvanic cellelectric potential \(V\)electric resistance \(R\)electric resistivity electric sector in mass spectrometryelectrical arc electrical double-layer electrical hygrometer electrically conducting polymer electrified interphase electro-dialysis electro-endosmosis electro-osmosis electro-osmotic hold-up time \(t_{\text{eo}}\) in capillary electromigrationelectro-osmotic mobility \(u\),\(\mu _{\text{eo}}\) in capillary electromigrationelectro-osmotic pressure electro-osmotic velocity electro-osmotic volume flow electroactive substance electrocapillarity electrocapillary equation electrochemical detector in gas chromatographyelectrochemical method of detection in analysiselectrochemical potential electrochemiluminescence electrochromic effect electrocyclic reaction electrode current density \(j\)electrode memory electrode potential \(E\)electrode process electrode reaction electrode reaction rate constants electrodecantation (or electrophoresis convection) electrodeposition electrofuge electrogenerated chemiluminescence electrographite electrokinetic potential \(\zeta\)electroluminescence electroluminescent polymer electrolytic hygrometer electromeric effect electromigration electromotive force \(E\)electron electron acceptor electron affinity \(E_{\text{ea}}\)electron attachment electron back-transfer electron beam curing electron capture electron capture detector in gas chromatographyelectron charge electron configuration electron correlation electron density electron density function electron detachment electron donor electron energy in mass spectrometryelectron exchange excitation transfer electron impact ionization in mass spectrometryelectron ionization in mass spectrometryelectron jump electron kinetic energy electron microscopy electron paramagnetic resonance electron probe microanalysis electron probe X-ray microanalysis electron rest mass electron spectroscopy for chemical analysis electron stopping power in X-ray emission spectroscopyelectron transfer electron transfer photosensitization electron work function \(\mathit{\Phi}\)electron-counting rules electron-deficient bond electron-deficient compounds electron-donor-acceptor complex electron-pair acceptor electron-pair donor electron-transfer catalysis electronation electronegativity electroneutrality principle electronic chemical potential electronic configuration electronic effect of substituents: symbols and signs electronic energy migration (or hopping) electronic stability electronic state electronically excited state electronvolt electrophile electrophilicity electrophoresis electrophoresis convection electrophoretic mobility \(\mu\)electrophoretic velocity \(\nu_{\text{ep}}\)electrophotography electrosmosis electrostatic filter electrostatic precipitator electrostriction electrothermal atomizer in spectrochemical analysiselectroviscous effects element element effect element of chirality elementary charge \(e\)elementary entity elementary particle in nuclear chemistryelementary reaction elimination eluate eluent elute elution elution band in chromatographyelution chromatography elution curve elutriation emanation thermal analysis embryo emission emission anisotropy emission control equipment in atmospheric chemistryemission flux in atmospheric chemistryemission in atmospheric chemistryemission spectrum emittance \(\varepsilon\)empirical formula emulsifier emulsion enamines enantioconvergence enantioenriched enantiomer enantiomer excess enantiomeric groups enantiomeric purity enantiomeric ratio enantiomeric units in a polymerenantiomerically enriched enantiomerically pure enantiomerism enantiomerization enantiomorph enantiomorphous structures in polymersenantiopure enantioselectivity enantiotopic enantiotropic mesophase enantiotropic transition encapsulation in catalysisencounter encounter complex encounter control encounter pair encounter-controlled rate end-group end-point end-to-end distance in polymersend-to-end vector in polymersendergonic reaction endo, exo, syn, anti endocytosis endoenzymes endothermic reaction ene reaction energized species energy dispersion in emission spectrometryenergy dispersive detector energy dispersive X-ray fluorescence analysis energy flux density energy gradient energy hypersurface energy migration energy of a radiationenergy of activation energy of activation of an electrode reactionenergy pooling energy profile energy resolution in radiochemistryenergy storage efficiency \(\eta\)energy threshold in radiochemistryenergy transfer in photochemistryenergy transfer plot in photochemistryenergy yield of luminescence energy \(E\)enforced concerted mechanism enhanced phosphorescence analysis in luminescence spectroscopyenhancement reaction in analytical chemistryenhancer enolates enols enophile enoses enrichment factor \(S\) in liquid-liquid distributionenrichment, isotopic ent entanglement network entatic state entering group enthalpimetric analysis enthalpimetric flow injection analysis enthalpimetric titration enthalpimetry enthalpogram enthalpy of activation \(\Delta ^{\ddagger}H^{\,\unicode{x26ac}}\)enthalpy of immersion enthalpy of wetting enthalpy \(H\)entitic entitic quantity entrainment in atmospheric chemistryentrainment in photochemistryentrance channel entropy of activation \(\Delta ^{\ddagger}S^{\,\unicode{x26ac}}\)entropy unit entropy \(S\)envelope conformation environmental monitoring environmental stress cracking enzyme activator enzyme activity enzyme induction in general chemistryenzyme induction in medicinal chemistryenzyme inhibitor enzyme repression enzyme substrate electrode enzyme thermistor enzymes enzymic decomposition epi-phase epicadmium neutrons epigenetic epihalohydrins epimerization epimers episulfonium ions epithermal neutrons epitope epoxides epoxy compounds equalization of electronegativity, principle of equatorial equilibration equilibrium constant equilibrium control equilibrium dialysate equilibrium distance in a moleculeequilibrium film equilibrium geometry equilibrium isotope effect equilibrium reaction equilibrium sedimentation equilibrium solution equivalence point equivalence postulate in polymer chemistryequivalent chain in polymersequivalent diameter equivalent entity erg error of measurementerythro structures in a polymererythro, threo ESCA escape depth (for surface analysis techniques) Esin and Markov coefficient esters ET-value \(E_{\text{T}}\)ethers euatmotic reaction eupeptide bond eutectic reaction evaluation function evaporation even-electron ion evolved gas analysis evolved gas detection Ewens–Bassett number exa excess acidity excess mass (at a solid/liquid interface) excess Rayleigh ratio excess volume (at a solid/liquid interface) exchange current of an electrode reactionexchange extraction exchange integral exchange labelling exchange repulsion exchange-inversion transition excimer excimer lamp excimer laser excimer-luminescence in luminescence quenchingexcipient in toxicologyexciplex exciplex-luminescence in luminescence quenchingexcitation excitation energy excitation energy in in situ microanalysisexcitation level in X-ray spectroscopyexcitation spectrum excitation transfer excitation-emission spectrum excited state exciton excluded volume of a macromolecule in polymersexcluded volume of a segment in polymersexclusion chromatography exergonic reaction exfoliated graphite exfoliation exit channel exitance exo exoenzymes exon exothermic reaction expansion factor in polymersexpectation value expected value experimental perturbational calculation explosivity limits exponential decay exposure in medicinal chemistryexposure in nuclear chemistryexposure in photochemistryexpression in biotechnologyextended Hammett equation extended Hückel MO method extended X-ray absorption fine structure extended-chain crystal in polymersextender extensive quantity extent of an interface (surface) extent of reaction \(\xi\)external compensation external heavy atom effect external ion return external ion-pair return external photoelectric effect external return external standard in chromatographyexternal surface exterplex extinction extinction coefficient extra-column volume in chromatographyextract (noun) extract (verb) extractability in solvent extractionextractant extracting agent extraction extraction (equilibrium) constant extraction coefficient extraction factor \(D_{\text{m}}\)extraction fractionation of polymersextraction in process liquid-liquid distributionextraction isotherm extraction process in catalysisextrapolated range in radiochemistryextremophiles extrusion transformation α-expulsion in photochemistryπ-electron acceptor/donor group ρσ-equation