IUPAC Gold Book - Alphabetical index

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

ρ-value (rho-value)
ρσ-equation (rho-sigma equation)
r, s
R, S
R*, S*
rabbit
rac
racemate
racemic
racemic compound
racemic conglomerate
racemic mixture
racemization
racemo structures in polymers
rad ^unit
radial development
radial electrostatic field analyser in mass spectrometry
radial elution (radial development) or circular elution (circular development) in planar chromatography
radian ^unit
radiance, $L$ ^quantity
radiant emittance^quantity
radiant energy, $Q$ ^quantity
radiant energy density, $ρ$ , $w$ ^quantity
radiant energy fluence rate^quantity
radiant (energy) flux, $P$ , $Φ$ ^quantity
radiant exitance, $M$ ^quantity
radiant exposure, $H$ ^quantity
radiant flux
radiant intensity, $I$ ^quantity
radiant power, $P$ ^quantity
radiant quantities
radiation
radiation chemistry
radiation constants
radiation continuum in spectrochemistry
radiation counter
radiation detector
radiation hazard
radiation reaction
radiation spectrum
radiation trapping
radiationless deactivation
radiationless decay
radiationless transition
radiative absorption in spectrochemistry
radiative capture
radiative de-excitation in spectrochemistry
radiative energy transfer
radiative lifetime, $τ 0$ ^quantity
radiative transition
radical anion
radical cation
radical centre(s)
radical combination
radical copolymerization
radical disproportionation
radical (free radical)
radical ion
radical pair (geminate pair)
radical photosubstitution
radical polymerization
radicofunctional name
radioactive
radioactive age
radioactive chain
radioactive contamination
radioactive cooling
radioactive dating
radioactive decay
radioactive equilibrium
radioactive fallout
radioactive half life
radioactive series
radioactive source
radioactive tracer
radioactive tracer technique in analysis
radioactive waste
radioactivity
radioanalytical chemistry
radiochemical activation analysis
radiochemical purification
radiochemical purity
radiochemical separation
radiochemical yield
radiochemistry
radiochromatograph
radiocolloid
radioenzymatic assay
radiograph
radiogravimetric analysis
radioimmunoassay
radioiodination
radioisotope
radioisotope dilution analysis
radioisotope induced X-ray emission analysis
radioluminescence
radiolysis
radiometric analysis
radiometric titration
radiometry
radionuclide
radionuclidic purity
radioreceptor assay
radiorelease analysis
radiosonde
radius of gyration, $s$
raffinate
rain out in atmospheric chemistry
random coil in polymers
random coincidence in nuclear chemistry
random copolymer
random copolymerization
random error
random sample
range in analysis
range of measurement of an analyser
Raoult's law
rate
rate coefficient
rate constant, $k$ ^quantity
rate law (empirical differential rate equation)
rate of appearance^quantity
rate of change of a quantity
rate of change ratio
rate of consumption, $v n , B$ or $v c , B$
rate of conversion, $ξ .$ ^quantity
rate of disappearance
rate of fluid consumption, $q V$ in flame emission and absorption spectrometry^quantity
rate of formation, $v n , y$ or $v c , y$
rate of liquid consumption in flame spectroscopy
rate of migration, $v$ in electrophoresis
rate of nucleation
rate of reaction, $v$ ^quantity
rate-controlling step
rate-determining step (rate-limiting step)
ratemeter in radiochemistry
ratio
raw coke
Rayleigh ratio
Rayleigh scattering
rayon-based carbon fibres
Re, Si
re-extraction
reactance, $X$ ^quantity
reactant
reacting bond rules
reaction
reaction barrier
reaction chromatography
reaction coordinate
reaction cross-section, $σ r$ ^quantity
reaction dynamics
reaction injection moulding (RIM)
reaction intermediate
reaction mechanism
reaction path
reaction path degeneracy
reaction probability, $P r$
reaction stage
reaction step
reaction time
reactive adsorption
reactive blending
reactive complex
reactive desorption
reactive polymer
reactive polymer processing
reactive (reactivity)
reactive scattering
reactivity index
reactivity–selectivity principle (RSP)
readability of a balance
reading
reagent
real (electrified) interphase
real potential of a species in a phase
real surface (interface) area
rearrangement
rearrangement ion in mass spectrometry
rearrangement stage
rebound reaction
receptor
receptor in drug design
recognition site
recoil in radioanalytical chemistry
recoil labelling
recoil-free fraction in Mössbauer spectrometry
recombinant DNA technology
recombination fluorescence
reconstructive transition
recovery
recovery factor in an extraction process
recrystallization
red shift
redox ion exchangers
redox polymer
redox potential
reduced adsorption
reduced limiting sedimentation coefficient
reduced mass, $μ$ ^quantity
reduced mobile phase velocity, $v$ in chromatography
reduced osmotic pressure
reduced sample
reduced sedimentation coefficient
reduced species
reduced viscosity of a polymer
reducing in analytical chemistry
reduction
reductive elimination
reductones
referee sample
reference atom in organic reaction mechanisms
reference cell (or blank cell) in spectrochemical analysis
reference dose (RfD)
reference electrode
reference material
reference method
reference procedure in analysis of trace air constituents
reference state of an element
reference value pH standard
reflectance, $ρ$ ^quantity
reflectance factor^quantity
reflection electron energy loss spectroscopy (REELS)
reflection factor
reflection high energy electron diffraction (RHEED)
reflectivity^quantity
refraction effects
refractive index, $n$ ^quantity
refractive index increment in polymer chemistry
regeneration of a catalyst
regioselectivity (regioselective)
regresssion analysis
regular block in a polymer
regular coke
regular comb macromolecule
regular macromolecule
regular oligomer molecule
regular polymer
regular single-strand polymer
regular star macromolecule
regulator gene
Rehm–Weller equation
reinforced reaction injection moulding (RRIM)
Reissert compounds
rel
relative
relative activity
relative adsorption
relative atomic mass (atomic weight), $A r$ ^quantity
relative biological effectiveness of radiation
relative configuration
relative counting in nuclear chemistry
relative density, $d$ ^quantity
relative detection limit
relative electrode potential
relative elongation
relative error
relative hardness
relative humidity
relative local current density
relative micellar mass
relative molar mass
relative molecular mass, $M r$ ^quantity
relative permeability, $μ r$ ^quantity
relative permittivity, $ɛ r$ ^quantity
relative preconcentration in trace analysis
relative responsivity^quantity
relative retardation, $R rel$ in planar chromatography^quantity
relative retention, $r$ in column chromatography^quantity
relative selectivity in catalysis
relative spectral responsivity
relative standard deviation, $s r$ , $σ r$
relative uncertainty
relative viscosity
relative viscosity increment
relative volumic mass
relativistic effects
relaxation
relaxation kinetics
relaxation time
releaser in analytical flame spectroscopy
rem ^unit
Renner–Teller effect
reorganization energy in electron transfer
reorganization in polymers
repeatability
repeating distance
(chain) repeating distance
repetency
replacement name
replacement operation in organic nomenclature
replicate (duplicate) sample
replication
report in analysis
reprecipitation
representative sample
repression
reproducibility
repulsive potential-energy surface
reserve sample
residence time
residence time (hydraulic retention time), $t r$ in biotechnology^quantity
residual current
residual emission anisotropy^quantity
residual fuel/oil
residual liquid junction (potential) error in pH measurement
residual spectrum/background spectrum in mass spectrometry
resin
resist polymer
resistance, $R$ ^quantity
resistivity, $ρ$ ^quantity
resolution in gas chromatography
resolution in mass spectroscopy
resolution in optical spectroscopy
resolution in stereochemistry
resolving power in mass spectrometry
resolving power, $R$ in optical spectroscopy^quantity
resolving time correction in nuclear analytical chemistry
resolving time in nuclear analytical chemistry
resonance
resonance absorption technique
resonance broadening of a spectral line
resonance cross-section in Mössbauer spectrometry
resonance effect
resonance effect magnitude in Mössbauer spectrometry
resonance emission
resonance energy
resonance energy in radiochemistry
resonance fluorescence
resonance fluorescence technique
resonance hybrid
resonance integral, $H r s$
resonance integral in radiochemistry
resonance lamp
resonance line in photochemistry
resonance line in X-ray spectroscopy
resonance neutrons
resonance radiation
response constant in electroanalytical chemistry
response time, $τ R$ of a detector^quantity
response time of an analyser
responsive gel
responsivity, $R$ in detection of radiation^quantity
rest point of a balance
restricted rotation
restriction enzymes
result in analysis
retardation factor, $R$ in column chromatography^quantity
retardation factor, $R F$ in planar chromatography^quantity
retarder
retentate
retention efficiency in particle separation
retention factor, $k$ in column chromatography^quantity
retention in nuclear chemistry
retention index, $I$ in column chromatography^quantity
retention of configuration
retention temperature in chromatography
retention time in chromatography
retention volumes in chromatography
reticulation in catalysis
retinoids
retro
retro-ene reaction
retroaddition
retrocycloaddition
reverse micelle (or reversed micelle)
reverse osmosis
reverse transcriptases
reversed direct-injection burner in analytical flame spectroscopy
reversed (radiochemical) isotope dilution analysis
reversed-phase chromatography
reversible network
reversible transition
revolutions per minute (rpm)
$R F$ value in chromatography
rheology
rheopexic gel
rheopexy
rheotropic gel
rhodamine dyes
rhombohedral graphite
ribbon delocalisation
ribonucleic acids (RNA)
ribonucleotides
ribosomal RNA (rRNA)
ribosomes
Rice–Ramsperger–Kassel (RRK) theory
Rice–Ramsperger–Kassel–Marcus (RRKM) theory
riffling in analytical chemistry
rigid chain
RIM
ring assembly
ring reversal (ring inversion)
ring-opening copolymerization
ring-opening polymerization
ring-sector
Ringelmann chart in atmospheric chemistry
ringing gel
rise time of a radiation detector^quantity
rise time of an analyser
(vertical) rise velocity in flame emission and absorption spectrometry, vf
risk
risk assessment
risk estimation
Ritchie equation
$R M$ value in planar chromatography^quantity
RNA
rod-like morphology
röntgen ^unit
root-mean-square end-to-end distance, $< r 2 > 1 / 2$ in polymers
Rosanoff convention
rotamer
rotational barrier
rotational constants
rotational correlation time, $τ c$ or $θ$ ^quantity
rotational diffusion
rotational diffusion coefficient
rotational frequency, $f rot$ in centrifugation^quantity
rotational relaxation time, $ρ$ ^quantity
rotational term, $F$ ^quantity
rotator phase transition
rotatory power
rotaxanes
rotenoids
rotometer in atmospheric chemistry
roughness factor (rugosity) of a surface
rovibronic state
R_p, S_p
RRIM
rRNA
RS
rubredoxin
ruby laser
rupture of a thin film
Rutherford backscattering (RBS)
Rydberg constant^constant
Rydberg orbital
Rydberg state
Rydberg transition
RYDMR