A | C |
D | E | F | H | I | K | L | M
| N | P | S | Y
a.i.
Active ingredient
Alevin
Newly hatched fish, before the fry stage. Usually refers to salmon.
CAS Number
CAS Number is a numeric designation given to a
specific chemical compound by the Chemical Abstract Service
d
Day; for example as in 10d LC50
EC
Effective Concentration; for example, EC50 is the effective
concentration where 50% of the organisms respond
F
Flow-through bioassay; for example 96h LC50,F
Fry
Small fish, especially young, recently hatched fish
h
Hour; for example 96h LC50
Half-Life
The time required for a chemical to degrade to half its initial
concentration
IC
Inhibitory Concentration; for example, IC50 is the concentration
for 50% inhibition, usually growth by microorganisms
Koc
Contaminant organic carbon partition
coefficient, proportion sorbed to carbon in soil
Kow
Contaminant octanol-water partition coefficient;
octanol/water ratio
LC
Lethal Concentration; for example, LC50 is the concentration
causing death in 50% of the test organisms exposed
LD
Lethal Dose; for example, LD50 is the dose causing death in 50% of the
test organisms exposed
log
The logarithm of a number
m
Month; for example 3m LC50
MATC
Maximum Acceptable Toxicant Concentration
Molecular Weight
The sum of the relative atomic masses of the constituent
atoms of a molecule
Molting
Periodic shedding of the cuticle in arthropods or the outer skin
of reptiles.
NOEC
No Observed Effect Concentration; the highest tested
concentration not causing an effect
NR
Mean concentration of test substance reducing viability; for example
NR50 is the mean concentration that reduces viability to 50% of controls
Parr
(1) A young
salmon during its first two years of life, when it lives in fresh water.
(2) The young of various other fishes.
pH
p(otential of) H(ydrogen); provides a measure on a scale from 0 to 14
of the acidity or alkalinity of a solution
S
Static bioassay; for example 96h LC50,S
Solubility
The quantity of a particular substance that can dissolve in
a particular solvent
y
Year; for example 1y LC50