IUPAC Gold Book - Alphabetical index

A B C D E F G H I J K L M N O P Q RST U V W X Y Z all (6414 items)

σ, π (sigma, pi)
σ → σ* transition
σ-adduct
σ-bond
σ-constant
σ-orbital
S
s-cis, s-trans
saccharides
Sackur–Tetrode constant
sacrificial acceptor
sacrificial donor
sacrificial hyperconjugation
saddle point
salami-like morphology
salt
salt effect
salt form of an ion exchanger
salting out
sample error in spectrochemical analysis
sample handling in analysis
sample in analytical chemistry
sample injector in chromatography
sample unit
sampler
sampling error
sampling interval in electroanalysis
sampling plan in analytical chemistry
sampling time in electroanalysis
sandwich compounds
sanitary land fill
saprophyte
saturated solution
saturation
saturation activity
saturation capacity
saturation fraction, $s B$ ^quantity
saturation in radioanalytical chemistry
saturation loading
saturation transfer
saturation vapour pressure
sawhorse projection
Saytzeff rule
sc
scaler
scaling circuit
scaling factor
scanning electron microscopy (SEM)
scanning method in mass spectrometry
scanning transmission electron microscopy (STEM)
scattering
scattering angle, $θ$ ^quantity
scattering cross-section, $σ scat$
scattering error in spectrochemical analysis
scattering matrix
scattering plane
scattering vector
scavenger
scavenging
Schenck reaction
Schenck-sensitization mechanism
Schiff bases (Schiff's bases)
Schiller layers
Schottky-barrier photodiode
Schulze–Hardy rule
Schulz–Zimm distribution
scintillation
scintillation counter
scintillation detector
scintillation spectrometer
scintillators
scrambling
scrubber in atmospheric chemistry
scrubbing
seco-
second ^unit
second messenger
second of arc
second-order transition
secondary crystallization
secondary current distribution
secondary electron multiplier in mass spectrometry
secondary electron yield in in situ microanalysis
secondary electrons (se) in in situ microanalysis
secondary excitation of X-rays
secondary fluorescence in X-ray emission spectroscopy
secondary ionization in mass spectrometry
secondary isotope effect
secondary kinetic electrolyte effect
secondary kinetic isotope effect
secondary metabolites
secondary pollution (emissions)
secondary radiation
secondary standard
secondary structure
secular equation
secular equilibrium
sediment
sedimentation
sedimentation coefficient, $s$ ^quantity
sedimentation equilibrium
sedimentation field strength
sedimentation in chemistry
sedimentation potential difference (sedimentation potential)
sedimentation velocity method
sedimentation velocity, $v B$
sedimentation volume
segment in analytical chemistry
segmented copolymer
segregated star macromolecule
segregation
segregation in polymers
selected area electron diffraction (SAED)
selected ion monitoring in mass spectrometry
selection in biotechnology
selection rule
selective corrosion
selective detector
selective digestion in spectrochemical analysis
selective elution in chromatography
selective in analysis
selective inhibition in catalysis
selective micro-sample in spectrochemical analysis
selective poisoning in catalysis
selective preconcentration in trace analysis
selective sample
selective solvent in polymer chemistry
selective sorption in polymer chemistry
selectively labelled
selectivity
selectivity coefficient, $k A / B$ in ion exchange chromatography
selectivity factor in ion exchange chromatography
selectivity factor, $S f$ ^quantity
selectivity in analysis
selectivity of a reagent
selectivity ratio
selenenic acids
selenides
seleninic acids
selenocyanates
selenols
selenones
selenonic acids
selenoxides
self inductance, $L$ ^quantity
self-absorption
self-absorption broadening of a spectral line
self-absorption effect in luminescence spectroscopy
self-absorption factor of a radiation source
self-diffusion coefficient
self-localized excitations in conjugated organic polymers
self-poisoning in catalysis
self-quenching
self-reversal
self-shielding
selones
semi-empirical quantum mechanical methods
semi-interpenetrating polymer network (SIPN)
semi-rigid chain
semicarbazones
semicoke
semiconductor
semiconductor detector
semiconductor laser
semiconductor-metal transition
semioxamazones
semiquinones
semisystematic name (semitrivial name)
seniority (senior) in organic nomenclature
sensitive area of a radiation detector
sensitive volume of a radiation detector
sensitivity in mass spectrometry
sensitivity, $A$ in metrology and analytical chemistry^quantity
sensitization
sensitization in colloid chemistry
sensitized luminescence
sensitizer
separability assumption
separated flame in flame spectroscopy
separation coefficient
separation factor, $α$ in column chromatography^quantity
separation factor, $α A , B$ in liquid-liquid distribution^quantity
separation number, $SN$ in chromatography^quantity
separation temperature in chromatography
sequence
sequence rules
sequencing (proteins, nucleic acids)
sequential analyser
sequential indication of an analyser
sequential interpenetrating polymer network
sequential measuring cell
sequential sample
sequential semi-interpenetrating polymer network
sequential spectrometer
series of analytical results
serum
sesquiterpenoids
sesterterpenoids
settling chamber in atmospheric chemistry
settling error in spectrochemical analysis
settling velocity
shape selectivity in catalysis
shape-memory polymer
shear breakdown
shear dependent viscosity
shear modulus, $G$ ^quantity
shear rate
shear strain, $γ$ ^quantity
shear stress, $τ$ ^quantity
shear thickening
shear thinning
shear transition
shear viscosity
shielded flame in flame spectroscopy
shielding
shielding constant, $σ$ ^quantity
shish-kebab structure
short chain
short-chain branch
short-range intramolecular interactions in polymers
shrinkage
shut-down state in analysis
shut-down time in analysis
shuttle vector
Si
SI
sialon
side chain
side group
side group or side-chain polymer liquid crystal
siemens ^unit
sievert ^unit
sigmatropic rearrangement
signal in analysis
signal sequence
silanes
silanols
silasesquiazanes
silasesquioxanes
silasesquithianes
silathianes
silazanes
silicones
siloxanes
silver film
silyl groups
silyl radicals
silylene
simple shear
simulation technique in analysis
simultaneous interpenetrating polymer network
simultaneous nucleation
simultaneous pair transitions
simultaneous reactions
simultaneous semi-interpenetrating polymer network
simultaneous spectrometer
single cell protein (SCP)
single channel pulse height analyser
single escape peak
single scattering
single-beam (luminescence) spectrometer
single-electron transfer mechanism (SET)
single-focusing mass spectrometer
single-photon counting
single-photon timing
single-step reaction
single-strand chain in a polymer
single-strand macromolecule
single-strand polymer
singlet molecular oxygen (singlet molecular dioxygen)
singlet state
singlet-singlet absorption
singlet-singlet annihilation
singlet-singlet energy transfer
singlet-triplet absorption
singlet-triplet energy transfer
singlet–triplet crossing
singly labelled
sink in atmospheric chemistry
sintering
SIPN
size-exclusion chromatography (SEC)
skeletal atom
skeletal bond
skeletal structure
skew
Slater determinant
Slater-type orbital
slip
slip casting
slot burner
slow neutrons
SM-interference
small particle in radiation scattering
smectic state
SMILES
smog chamber in atmospheric chemistry
smog in atmospheric chemistry
smog index in atmospheric chemistry
smoke
smooth transition
soap
soap curd
soap film
soft acid
soft base
soft-segment phase domain
soiling in atmospheric chemistry
sol
sol fraction
sol-gel coating
sol-gel critical concentration
sol-gel material
sol-gel metal oxide
sol-gel process
sol-gel silica
sol-gel transition
solar conversion efficiency
solar flare
solar radiation in atmospheric chemistry
solid angle, $Ω$ , $ω$ ^quantity
solid phase antibody radioimmunoassay
solid polymer electrolyte
solid solution
solid state lasers
solid support in column chromatography
solid volume in column chromatography
solidification
solidus
soliton
solubility
solubility parameter, $δ$
solubility product
solubilization
solute
solute-volatilization interference in flame spectroscopy
solution
solvation
solvation energy
solvatochromic relationship
solvatochromism
solvent
solvent extraction
solvent front in chromatography
solvent in liquid-liquid distribution
solvent ion exchange (SIX)
solvent isotope effect
solvent migration-distance in chromatography
solvent parameter
solvent regeneration in extraction processes
solvent shift
solvent-induced symmetry breaking
solvent-separated ion pair
solvent-shared ion pair
solvolysis
solvophobicity parameter, $Sp$ ^quantity
solvus
SOMO
sonication
sonogel
sonoluminescence
sonosol
soot
Soret band
sorption in colloid chemistry
sorption isotherm in ion exchange
sorption techniques in trace analysis
sorptive insertion in surface catalysis
source efficiency of a radiation source
sp
space charge in a semiconductor
space formula
space time in catalysis
space velocity in catalysis
spacer
spark (source) ionization in mass spectrometry
spatial-distribution interference in flame spectroscopy
spatially resolving detector of radiation
special salt effect
speciation analysis in chemistry
speciation in chemistry
species (taxonomic)
specific
specific acid–base catalysis
specific activity, $a$ in radiochemistry^quantity
specific adsorption
specific burn-up
specific catalysis
specific conductance
specific detector in chromatography
specific gravity
specific heat capacity, $c$ ^quantity
specific in analysis
specific ionization in nuclear chemistry
specific permeability in chromatography
specific photon emission^quantity
specific pore volume of a catalyst
specific retention volume in chromatography
specific surface area in surface chemistry
specific volume, $v$ ^quantity
specific weight
specifically absorbing ion
specifically labelled
specifically labelled tracer
specimen in analytical chemistry
spectator mechanism
spectator-stripping reaction
spectral bandwidth error in spectrochemical analysis
spectral distribution
spectral fluence rate, $E λ , o$ ^quantity
spectral intensity
spectral interference in flame spectroscopy
spectral irradiance, $E λ$ ^quantity
spectral overlap
spectral (photon) effectiveness
spectral photon exitance, $M p λ$ ^quantity
spectral photon flow, $Φ p λ$ ^quantity
spectral photon flux (photon irradiance), $E p λ$ ^quantity
spectral photon radiance, $L p λ$ ^quantity
spectral quantities
spectral radiance, $L λ$ ^quantity
spectral radiant energy, $Q λ$ ^quantity
spectral radiant exitance, $M λ$ ^quantity
spectral radiant flux
spectral radiant intensity, $I λ$ ^quantity
spectral radiant power, $P λ$ ^quantity
spectral responsivity
spectral responsivity function^quantity
spectral sensitivity, $S λ$ ^quantity
spectral sensitization
spectral spheradiance
spectrochemical buffer in atomic spectroscopy
spectrochemical carrier in atomic spectroscopy
spectrogram
spectrograph
spectrometer
spectrometry
spectroscope
spectroscopy
spectrum analysis
specular reflectance (reflection factor), $ρ$ in optical spectroscopy^quantity
speed, $v$ , $c$ ^quantity
speed distribution function, $F c$
speed of light in a vacuum^constant
spherical carbonaceous mesophase
spherical irradiance^quantity
spherical radiance
spherical radiant exposure
spherulite
spin adduct
spin conservation rule (Wigner rule)
spin contamination
spin counting
spin crossover
spin density
spin label
spin polarization
spin probe
spin projection
spin trapping
spin-allowed electronic transition
spin-flip method
spin-flip transition
spin-flop transition
spin-glass transition
spin-orbit coupling
spin-orbit coupling constant, $A$ ^quantity
spin-orbit splitting
spin-Peierls transition
spin-state transition
spin-statistical factor (in diffusion-controlled reactions)
spinodal
spinodal curve
spinodal decomposition
spin–spin coupling
spin–spin coupling constant, $J AB$
spiro atom
spiro chain in a polymer
spiro compounds
spiro macromolecule
spiro polymer
spiro union
splicing
spontaneous emission
spontaneous fission
spontaneous resolution
spot in chromatography
spot sampling
sprayer in flame spectroscopy
spread monolayer
spreading function in chromatography
spreading wetting
sputter yield
sputtering
square-wave current
SR
stability constant
stable
stable film, metastable film
stable ion in mass spectrometry
staggered conformation
stagnant inversion in atmospheric chemistry
stand-by state in analysis
standard acceleration of free fall
standard atmosphere
standard atomic weights
standard chemical potential
standard concentration
standard conditions for gases
standard deviation, $s$
standard electrode potential, $E °$
standard electromotive force
standard entropy of activation, $Δ ‡ S °$ , $Δ ‡ S$
standard equilibrium constant, $K °$ , $K$
standard Gibbs energy of activation $Δ ‡ G °$ , $Δ ‡ G$
standard hydrogen electrode
standard molality $m ⦵$ , $m °$
standard potential of an electrode reaction
standard potential of the reaction in a chemical cell
standard pressure
standard rate constant of an electrode reaction
standard reaction quantities
standard solution
standard state
standard subtraction method in electroanalytical chemistry
standard thermodynamic quantities
standard uncertainty
stannoxanes
stannylenes
stannylidenes
star copolymer
star macromolecule
star polymer
Stark effect
start-up time in analysis
starting line in chromatography
starting point in chromatography
state crossing
state diagram
state function
state-to-state kinetics
static fields mass spectrometer
static pressure
static quenching
static stability
stationary phase (fermentation)
stationary phase in chromatography
stationary phase volume, $V s$ in chromatography
stationary state
stationary-phase fraction
statistical coil in polymers
statistical copolymer
statistical copolymerization
statistical factor
statistical pseudo-copolymer
statistical segment in polymers
statistical weight^quantity
steady state approximation (treatment)
steady state in liquid-liquid distribution
steady state (stationary state)
Stefan–Boltzmann constant^constant
stem cell
stem in polymer crystals
step height in chromatography
step in chromatography
stepped surface
stepwise elution in chromatography
stepwise reaction
steradian^unit
stereoblock macromolecule
stereoblock polymer
stereochemical formula (stereoformula)
stereochemical non-rigidity
stereoconvergence
stereodescriptor
stereoelectronic
stereoelectronic control
stereoformula
stereogenic unit (stereogen/stereoelement)
stereoheterotopic
stereohomosequence in a polymer
stereoisomerism
stereoisomers
stereomutation
stereoregular macromolecule
stereoregular polymer
stereorepeating unit in a polymer
stereoselective polymerization
stereoselective synthesis
stereoselectivity
stereosequence in a polymer
stereospecific polymerization
stereospecifically labelled tracer
stereospecificity (stereospecific)
steric effect
steric factor
steric factor in polymers
steric hindrance
steric isotope effect
steric strain
steric-approach control
Stern layer
Stern–Volmer kinetic relationships
steroids
sterols
stibanes
stibanylidenes
stibines
stibinidenes
stibonium compounds
sticking coefficient in surface chemistry
sticking probability in surface chemistry
sticky ends in biotechnology
stimulated emission
stirred flow reactor in catalysis
stochastic effect
stochastic sampling
stochastic theories
Stock number
Stockholm convention
stoichiometric
stoichiometric capacity
stoichiometric concentration, $c$
stoichiometric mean molal (practical activity coefficient) in electrochemistry
stoichiometric number, $ν$ ^quantity
stoichiometry
stokes^unit
Stokes law
Stokes number, $St$ ^quantity
Stokes parameters
Stokes shift
Stokes type radiation
stopped flow
stopped-flow cell in spectrochemical analysis
stopping power
STP
strain
strain energy
strain-induced transition
stratified film
stratified sample
stratocumulus cloud
stratopause
stratosphere
stratus cloud
stray radiation error in spectrochemical analysis
streak camera
streak tube
streaming birefringence
streaming current
streaming potential difference (streaming potential)
stress graphitization
stress-assisted transition
strip dynode photomultiplier tube
stripping
stripping isotherm
stripping ratio in solvent extraction
stripping reaction
stripping solution in liquid-liquid distribution
strong collision
structural disorder
structural formula
structural stability
structural transition
structure of a catalyst
structure-based design in drug design
structure-property correlations (SPC)
structure–activity relationship (SAR)
styphnates
subchain of a polymer
subgroup-supergroup transition
subjacent orbital
sublation in solvent extraction
sublimation
subphase in thin films
subsample
substance concentration
substance content, $n / m$
substance flow rate
substance fraction, $x$ ^quantity
substituent atom (group)
substituent electronegativity
substitution reaction
substitutive name
substoichiometric extraction
substoichiometric isotope dilution analysis
substrate
substrate in biocatalysis
substrate in thin films
subtractive name
successor complex
sudden polarization
sudden potential-energy surface
sugars
suicide inhibition
suicide metabolism
sulfamic acids
sulfanes
sulfatides
sulfenamides
sulfenes
sulfenic acids
sulfenium ions
sulfenyl groups
sulfenyl nitrenes
sulfenyl radicals
sulfenylium ions
sulfides
sulfilimines
sulfimides
sulfimines
sulfinamides
sulfinamidines
sulfines
sulfinic acids
sulfinic anhydrides
sulfinimines
sulfinylamines
sulfolipids
sulfonamides
sulfonamidines
sulfonediimines
sulfones
sulfonic acids
sulfonic anhydrides
sulfonimides
sulfonium compounds
sulfonphthaleins
sulfonylamines
sulfoxides
sulfoximides
sulfoximines
sulfur diimides
sultams
sultims
sultines
sultones
sum of states, $P ɛ$
summit current in polarography
summit potential
superabsorbent polymer
superacid
superbase
superconducting transition
supercritical drying of a gel
supercritical fluid
supercritical fluid chromatography (SFC)
superequivalent adsorption
superexchange interaction
superficial work in surface chemistry
superlattice
superposability
superradiance
supersaturation
support of a catalyst
support plate in chromatography
support-coated open-tubular (SCOT) column in chromatography
supporting electrolyte
suppressor
suprafacial
supramolecular chemistry
supramolecule
surface
surface active agent
surface amount, $n s$ , $n a$ ^quantity
surface barrier semiconductor detector
surface catalysis
surface charge density, $σ$ ^quantity
surface charge layer
surface chemical potential
surface concentration, $Γ$ ^quantity
surface contamination in surface analysis
surface coverage, $θ$ ^quantity
surface crossing
surface density, $ρ A$ , $ρ S$ ^quantity
surface dilatational viscosity
surface dipole layer
surface electric potential
surface excess, $n σ$ ^quantity
surface excess concentration (at an interface), $Γ$ ^quantity
surface (excess) conductivity
surface excess energy
surface excess enthalpy
surface excess entropy
surface excess Gibbs energy
surface excess Helmholtz energy
surface excess isotherm
surface fractal dimension
surface grafting
surface ionization in mass spectrometry
surface ions
surface layer (or interfacial layer)
surface of a phase (free surface)
surface of tension
surface potential
surface pressure
surface reaction in electrochemistry
surface region
surface rheology
surface shear viscosity
surface states
surface stress, $T i j$
surface tension, $γ$ , $σ$ ^quantity
surface work
surfactant (surface active agent)
surprisal analysis
surprisal, $s$
suspended matter in atmospheric chemistry
suspension
suspension effect in an ion-selective electrode
Swain–Lupton equation
Swain–Scott equation
swelling agent
swelling in colloid and surface chemistry
swelling pressure in colloid and surface chemistry
switchboard model in polymer crystals
switching transition
sydnone imines
sydnones
sym-
symbiosis
symbol in quantities and units
symmetrical films
symmetry number, $s$ ^quantity
symmetry-breaking transition
symmetry-conserving transition
symproportionation
syn
synartetic acceleration
synchronization (principle of nonperfect synchronization)
synchronous
synchronously excited (fluorescence, phosphorescence) spectrum
synchrotron radiation
synclinal
syndet
syndiotactic macromolecule
syndiotactic polymer
syndiotactic triads in polymers
syneresis
synergism in solvent extraction
synergism in toxicology
synoptic scale
synperiplanar
syntectic reaction
synthetic graphite
system
system of units of measurement
systematic error
systematic name
Système International d'Unités
systemic effect
Szilard–Chalmers effect