Toxicant: A harmful substance or agent that may injure an exposed organism.
toxicant
See toxic substance
toxic chemical
See toxic substance ...
Toxicant/toxic substance
A human-made chemical or mixture that presents a risk of death, disease, injury or birth defects in organisms that ingest or absorb them.(1), (5) ...
The dose of a toxicant or microbe that will kill 50 percent of the test organisms within a designated period. The lower the LD 50, the more toxic the compound.
Ldlo
Lethal dose low; the lowest dose in an animal study at which lethality occurs.
Toxic Substance (Toxicant): harmful to plant or animal life, either immediately (acute toxicity) or over a long time period (chronic toxicity).
toxic substance, toxicant, or toxin
A substance or mixture which has the potential to cause death, disease, behavioral abnormalities, cancer, genetic mutations, physiological malfunctions, or physical deformities in organisms or their offspring.
Ammonia A hazardous chemical widely used in many industries that is suspected to be a respiratory toxicant, neurotoxicant and reproductive toxicant.Anaerobic A life or process that occurs in, or is not destroyed by, the absence of oxygen.
Identifying the pathways by which toxicants may reach individuals, estimating how much of a chemical an individual is likely to be exposed to, and estimating the number likely to be exposed.
Source: Terms of the Environment
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LD 50 / Lethal Dose: The dose of a toxicant or microbe that will kill 50 percent of the test organisms within a designated period. The lower the LD 50, the more toxic the compound.
A local effect produced in the tissue or organ of first contact between a toxicant and the biological system.
Pond
A relatively small, sometimes ephemeral or seasonal, inland body of fresh water occupying basin or hollow in the earth's surface.
Exposure Assessment: Identifying the pathways by which toxicants may reach individuals, estimating how much of a chemical an individual is likely to be exposed to, and estimating the number likely to be exposed.
Portal-of-Entry Effect- A local effect produced in the tissue or organ of first contact between a toxicant and the biological system.
Polonium- A radioactive element that occurs in pitchblende and other uranium-containing ores.
Individual Risk: The increased risk for a person exposed to a specific concentration of a toxicant.
Indoor Air: The air that people breathe inside a built environment.
Value, such as concentration in air or water, that is derived after appropriate allocation of the reference dose among the possible media of exposure to assist regulatory authorities in establishing permissible levels of a potential toxicant.
collection, interpretation, and storage of information about gene and protein activity in order to identify toxic substances in the environment, and to help treat people at the greatest risk of diseases caused by environmental pollutants or toxicants.
 See also: Toxic, Environment, Water, Exposure, Organism
  
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