Residence time of a chemical species (pesticide and/or metabolites) subjected to degradation or physical removal in a soil, crop, animal or other defined environmental compartment.
the amount of time a pesticide remains in the environment before breaking down to less toxic compounds.
Stability of chemical compounds in the environment. Persistence is an important negative criterion in the ecological assessment of chemicals.
the length of time elapsed between the first-taken and the last-taken dose in a prescribed dosing regimen
In this context, a measure of how long a pesticide remains in an active form at the site of application or in the environment.
The length of time that a TV needs to be in a particular status (e.g. tuned to a particular channel) before this status is recorded by the meter. This is currently set to 10 seconds.
The length of time a chemical will remain essentially unchanged in the environment.
an attempt to measure whether certain relationships or findings last over time.
Attribute of a substance that describes the length of time that the substance remains in a particular environment before it is physically removed or chemically or biologically transformed. Note: Sometimes misused without reference to length of time.
When a chemical fails to undergo biodegradation under a specified set of conditions. A chemical may be inherently biodegradable, yet persist in the environment. Compare to recalcitrant.
Remaining for an extended period of time. Applicable to some chemicals (e.g. DDT) that do not easily break down into less hazardous substances
The length of time a pesticide, its residue or degradate remain in the environment after application. See Half-life.
The length of time a pesticide remains in the environment. Usually expressed as the half-life (T1/2) of a chemical.
The duration of time following administration that a contrast agent remains useful in the diagnosis of a patient.
The quality of remaining for a long period of time (such as in the environment or the body). Persistent chemicals (such as DDT and PCBs) are not easily broken down.
Refers to the length of time a compound stays in the environment, once introduced. A compound may persist for less than a second or indefinitely.()
On this site, persistence generally refers to environmental persistence: the length of time a chemical stays in the environment, once introduced. Persistent chemicals do not break down easily in the environment.
Attribute of a substance that describes the length of time that the substance remains in a particular environment before it is physically removed or chemically or biologically transformed. IRPTC, 1982 RT recalcitrance
The ability of a substance to remain in its original form without breaking down.
Forestry Operations & Water Quality] The relative ability of a pesticide to remain active over a period of time.
The resistance to degradation as measured by the period of time required for complete decomposition of a material.
refers to a slowly decomposing substance which remains active in the natural cycle for a long period of time.
The presence of a pesticide in its active state and in a measurable concentration. Measure of time a chemical is active.