News & Notices

Organizations & People

Standing Committees

Divisions

Projects

Reports

Publications
..CI
..PAC
..Macro. Symp.
..Books
..Solubility Data

Symposia

AMP

Links of Interest

Search the Site

Home Page

IUPAC Compendium of Chemical Terminology

 

[A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M]
[N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z]

> Back to index

alpha-addition
alpha, beta
alpha-cleavage
alpha-decay
alpha-effect
alpha-elimination
alpha-oxo carbenes
alpha-particle
A-factor
`A' value
abatement (in atmospheric chemistry)
abeo-
ab initio calculations (1997, 69, 1139)
ab initio calculations (1999, 71, 1921)
abiological
abiotic
abiotic transformation
absolute activation analysis
absolute activity,
absolute configuration
absolute counting (in radioanalytical chemistry)
absolute electrode potential
absolute full energy peak efficiency
absolute lethal concentration (LC100)
absolute lethal dose (LD100)
absolute photopeak efficiency
absolute preconcentration (in trace analysis)
absorbance, A
absorbance matching (in spectrochemical analysis)
absorbed dose (of a substance)
absorbed dose (of radiation), D
absorbed electron coefficient (in in situ microanalysis)
absorbed electrons (in in situ microanalysis)
absorber
absorptance, alpha
absorption
absorption coefficient
absorption coefficient (in biology)
absorption cross-section, sigma
absorption factor
absorption intensity
absorption line
absorption pathlength (of a sample cell)
absorption spectrum
absorptivity
abstraction
abstraction process (in catalysis)
abundance sensitivity (in mass spectrometry)
ac
accelerating voltage (high voltage, V) scan (in mass spectrometry)
acceleration, a
acceleration energy (in in situ microanalysis)
acceleration of free fall, g
accelerator (in solvent extraction)
acceptable daily intake (ADI) (1993, 65, 2008)
acceptable daily intake, ADI (2004, 76, 1036)
acceptor number (AN)
accommodation coefficient
accretion (in atmospheric chemistry)
accuracy (of a measuring instrument)
accuracy (of measurement)
acenes
acetals
acetogenins
acetonides
acetylene black
acetylenes
acetylides
Acheson graphite
achiral
achirotopic
acid
acid anhydrides
acid-base indicator
acid-base titration
acid deposition (in atmospheric chemistry)
acid-labile sulfide
acidimetric titration
acidity
acidity constant
acidity function
acidosis
acid rain (in atmospheric chemistry)
acid thioanhydrides
aci-nitro compounds
actinic flux
actinometer
action spectrum
activated adsorption process
activated carbon
activated charcoal
activated complex
activation
activation (in electrochemical corrosion)
activation (in radiochemistry)
activation analysis (nuclear)
activation cross-section
activation energy (Arrhenius activation energy)
activation reaction
activator
active centre
active medium
active metal (in electrochemical corrosion)
active site (in heterogeneous catalysis)
active solid
active species
active state (in electrochemical corrosion)
active transport (in biology)
activity
activity (of a radioactive material), A
activity (relative activity), a
activity coefficient, f, gamma
acute toxicity
acylals
acyl anions
acyl carbenes
acyl cations
acyl groups
acyl halides
acylium ions
acyloins
acyloxyl radicals
acyl radicals
acyl species
added hydrogen
addend
addition
addition reaction
additive
additive (in polymer chemistry)
additive name
additivity of mass spectra
additivity principle
adduct
adduct ion (in mass spectrometry)
adhesion
adhesional wetting
adiabatic
adiabatic electron transfer
adiabatic ionization (in mass spectrometry)
adiabatic lapse rate (in atmospheric chemistry)
adiabatic photoreaction
adiabatic transition-state theory
adiabatic treatments of reaction rates
adjacent re-entry model (in polymer crystals)
adjusted retention volume (in chromatography)
adjuvant
ADMR
adsorbate
adsorbent
adsorber
adsorption
adsorption capacity
adsorption chromatography
adsorption complex
adsorption current
adsorption hysteresis
adsorption indicator
adsorption isobar
adsorption isostere
adsorption isotherm (1976, 46, 77)
adsorption isotherm (1996, 68, 1592)
adsorptive
advancement
advection (in atmospheric chemistry)
adverse effect
aeration (in atmospheric chemistry)
aerobe
aerobic
aerobic conditions
aerogel
aeromete (in atmospheric chemistry)
aerometric measurement (in atmospheric chemistry)
aerosol
affinity chromatography
affinity of reaction, A
after mass analysis (in mass spectrometry)
ageing (of precipitate)
agglomerate (in catalysis)
agglomeration
agglutination
aggregate (in catalysis)
aging (ageing) (of a polymer)
aglycon (aglycone)
agonist
agostic
agostic interaction
agranular carbon
air contaminant (in atmospheric chemistry)
air-lift bioreactor
air mass (in atmospheric chemistry)
air monitoring station (in atmospheric chemistry)
air pollutant
air pollution
air pollution index (air quality index)
air pollution survey (in atmospheric chemistry)
air quality characteristic (in atmospheric chemistry)
air resource management (in atmospheric chemistry)
air sampling network (in atmospheric chemistry)
Aitken particles
albedo
albumin
alcoholates
alcohols
alcoholysis
aldaric acids
aldazines
aldehydes
aldimines
alditols
aldoketoses
aldonic acids
aldoses
aldoximes
alert levels (in atmospheric chemistry)
alicyclic compounds
aliphatic compounds
aliquot (in analytical chemistry)
alkalimetric titration
alkaloids
alkalosis
alkanes
alkanium ions
alkenes
alkoxides
alkoxyamines
alkylenes
alkyl groups
alkylideneamino carbenes
alkylideneaminoxyl radicals
alkylideneaminyl radicals
alkylidene groups
alkylidenes
alkylidynes
alkyl radicals
alkynes
allele
allenes
allo- (in amino-acid nomenclature)
allometric
allosteric enzymes
allostery
allotriomorphic transition
allotropes
allotropic transition
allylic groups
allylic intermediates
allylic substitution reaction
alternancy symmetry
alternant
alternating copolymer
alternating copolymerization
alternating current
alternating voltage
altocumulus cloud (in atmospheric chemistry)
altostratus cloud (in atmospheric chemistry)
ambident
ambient air (in atmospheric chemistry)
ambient air quality (in atmospheric chemistry)
ambo
Ames/salmonella test
amic acids
amide hydrazones
amide oximes
amides
amidines
amidium ions
amidrazones
aminals
amine imides
amine imines
amine oxides
amines
amine ylides
aminimides
aminium ions
aminiumyl radical ions
amino-acid residue (in a polypeptide)
aminonitrenes
aminooxyl radicals
amino radicals
amino sugars
aminoxides
aminoxyl radicals
aminylenes
aminylium ions
aminyl oxides
aminyl radicals
ammonium compounds
ammonium imines
ammonium ylides
ammoniumyl radical ions
amorphous carbon
amount concentration, c
amount fraction, x (y for gaseous mixtures)
amount of substance, n
amount-of-substance concentration
amount-of-substance fraction, x
ampere
amperometric detection method (in electrochemical analysis)
amphipathic
amphiphilic
amphiprotic (solvent)
ampholytes
ampholytic polymer
amphoteric
amplification reaction
amplitude of alternating current
amplitude of alternating voltage
AM (0) sunlight
AM (1) sunlight
anabolism
anaerobe
anaerobic
anaesthetic
analgesic
analogue metabolism
analogue to digital converter (pulse)
analyte
analytical function
analytical instrument
analytical intercomparison
analytical portion
analytical pyrolysis
analytical quality control
analytical radiochemistry
analytical sample
analytical solution
analytical solution calorimetry
analytical unit (analyser)
anation
anchimeric assistance
aneroid barometer
Anger camera
angle
angle of observation
angle of optical rotation, alpha
angle strain
angular distribution
angular frequency, omega
angular momentum, L
angular overlap model (AOM)
anhydrides
anhydro bases
anilides
anils
anion
anion exchange
anion-exchange polymer
anion exchanger
anionic polymer
anionic polymerization
anionotropic rearrangement (or anionotropy)
anion radical
anisometric
anisotropy
annelation
annihilation
annulation
annulenes
annulenylidenes
anode
anodic transfer coefficient
anomeric effect
anomers
ansa compounds
antagonism
antagonist
antarafacial
anthelmint(h)ic
anthocyanidins
anthocyanins
anti
antiaromatic compounds
antiaromaticity (antithetical to aromaticity)
antibiotic
antibody
antibonding molecular orbital
anticholinergic
anticircular elution (anticircular development) (in planar chromatography)
anticlinal
anticlined structures (in polymers)
anticodon
anti-Compton gamma-ray spectrometer
anticyclone (in atmospheric chemistry)
antiferroelectric transition
antiferromagnetic transition
antigen
anti-Hammond effect
antihelminth
anti-Markownikoff addition
antimetabolite
antimony-xenon lamp (arc)
antimycotic
antiparticle
antiperiplanar
antipodes
antiprismo-
antiresistant
antiserum
anti-Stokes shift
anti-Stokes type radiation (fluorescence)
antisymmetry principle
anti-thixotropy
ap
apex
apex current
apex potential
aphicide
apical (basal, equatorial)
apicophilicity
apo- (in carotenoid nomenclature)
apoenzyme
apoprotein
apoptosis
apparent (quantity)
apparent lifetime
apparent viscosity (of a liquid)
appearance energy (appearance potential)
appearance potential
appearance temperature (in electrothermal atomization), Tapp
applied potential
aprotic (solvent)
aquation
arachno-
Archibald's method
area (of an electrode-solution interface)
area of interface
area viscosity
areic
arene epoxides
arene oxides
arenes
arenium ions
arenols
arenonium ions
argon ion laser
arithmetic mean (average)
aromatic
aromaticity
arrester (in atmospheric chemistry)
Arrhenius A factor
Arrhenius energy of activation
Arrhenius equation
arsanes
arsanylidenes
arsanylium ions
arsenides
arsine oxides
arsines
arsinic acids
arsinidenes
arsinous acids
arsonic acids
arsonium compounds
arsonous acids
arsoranes
artificial graphite
artificial neural networks
artificial radioactivity
aryl cations
arylene groups
aryl groups
aryne
ascending elution (ascending development) (in planar chromatography)
ash (in atmospheric chemistry)
ashing (in analysis)
aspirator
assay
assay kit
association
association reaction (associative combination)(in mass spectrometry)
associative desorption
associative ionization (in mass spectrometry)
associative surface reaction
asym-
asymmetric
asymmetric carbon atom
asymmetric centre
asymmetric destruction
asymmetric film
asymmetric induction
asymmetric membrane
asymmetric synthesis
asymmetric transformation
asymmetry
asymmetry potential (of a glass electrode)
atactic macromolecule
atactic polymer
atmosphere
atmosphere (of the earth)
atmospheric pressure ionization (in mass spectrometry)
atom
atom-atom polarizability
atom-bond polarizability
atomic charge
atomic fluorescence
atomic laser
atomic mass
atomic mass constant
atomic mass unit
atomic number (proton number), Z
atomic orbital, psi, phi, chi
atomic ring-sector
atomic spectral lines
atomic symbol
atomic units (G.B. 76, 120)
atomic units (1999, 71, 1924)
atomic weight
atomization (in analytical flame spectroscopy)
atomization surface temperature (in electrothermal atomization), Ts
atomize
atomizer (in analytical flame spectroscopy)
atom-molecule complex mechanism
atropisomers
attachment
attenuance, D
attenuance filter
attenuation
attenuation coefficient
atto
attractive-mixed-repulsive (AMR) classification
attractive potential-energy surface
attributable risk
aufbau principle
Auger effect
Auger electron
Auger electron spectroscopy
Auger electron yield
Auger yield
autacoid
autocatalytic reaction
auto-ionization (in mass spectrometry)
automation (in analysis)
automerization
autophobicity
autopoisoning (in catalysis)
autoprotolysis
autoprotolysis constant
autoradiograph
autoradiolysis
auxiliary electrode
auxochrome
auxotrophy
avalanche photodiode
average current density
average degree of polymerization
average life (in nuclear chemistry)
average rate of flow (in polarography)
Avogadro constant
avoided crossing (of potential-energy surfaces)
Avrami equation
axial (equatorial)
axial chirality
axialite (in polymer crystals)
axis of chirality
axis of helicity
azacarbenes
azamines
azanes
azenes
azides
azimines
azines
azinic acids
azlactones
azo compounds
azo imides
azomethine imides
azomethine oxides
azomethines
azomethine ylides
azonic acids
azoxy compounds
azo ylides
azylenes
pi-adduct
sigma-adduct

^ top
> next page