No observed adverse effect level definition

No observed adverse effect level or “NOAEL” means the exposure level at which there are no statistically or biologically significant increases in frequency or severity of adverse effects between the exposed population and its appropriate control. Some effects may be produced at this level, but they are not considered to be adverse, nor precursors to specific adverse effects.
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No observed adverse effect level means the level established by the United States
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No observed adverse effect level or "NOAEL" means the highest tested dose or concentration of a substance which results in no observed adverse effect in exposed test organisms where higher doses or concentrations result in an adverse effect.
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Examples of No observed adverse effect level in a sentence

  • No observed adverse effect level" or "NOAEL" is the highest tested dose or concentration of a substance that resulted in no observed adverse effect in exposed test organisms where higher doses or concentrations resulted in an adverse effect.

  • Margin of Exposure; NOAEL = No observed adverse effect level; and LOAEL = Lowest observed adverse effect level.

  • No observed adverse effect level (NOAEL)-based HQs for the white-footed mouse in the Former Wastewater Impoundments are presented in Table 31.

  • Acute toxicityDose and lethal concentrations:DL50 (OECD 401) DL50 (OECD 402) CL50 (OECD 403)mg/kg oral mg/kg cutaneous mg/m3 4h inhalation Methylene chloride 1410 Rat >2000 Rat >52000 Rat No observed adverse effect level: Not available.

  • Summarised toxic risk values for fluoride (Source: TERA (toxicology excellence for risk assessment)) Organization NameAgency for Toxic Substances Disease registry (ATSDR) **NOAEL = No observed adverse effect level; *LOAEL = Lowest observed adverse effect level.


More Definitions of No observed adverse effect level

No observed adverse effect level means the level established by the United States Environmental Protection Agency for acute oral toxicity for adult honeybees.
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No observed adverse effect level or “NOAEL” means the level of exposure of an organism, found by experiment or observation, at which there is no biologically or statistically significant increase in the frequency or severity of any adverse effects in the exposed population when compared to its appropriate control.
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No observed adverse effect level or "NOAEL" means the exposure level at which there are no statistically or biologically significant increases in frequency or severity of adverse effects between the ex-
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No observed adverse effect level means the level established by the United States Environmental Protection Agency for acute oral toxicity for adult honeybees "reference value" means the most appropriate value determined by the commissioner of agriculture based on the commissioner's review of pollinator protective reference values published or approved by the United States Environmental Protection Agency. If a United States Environmental Protection Agency reference value is not available for a specific systemic insecticide or is not appropriate for use in Minnesota or for a specific type of plant, plant material, or nursery stock, the commissioner may consider reference values from other states, peer-reviewed literature, or other appropriate sources.
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No observed adverse effect level means the highest exposure level of a chemical at which no harmful effects have been seen in research and scientific studies, and which represents the common benchmark used by the Federal environmental protection agency and the food and drug administration for risk classification and assessment of chemicals, including pesticides.
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No observed adverse effect level means the greatest concentration or amount of a substance found by experiment or observation that does not cause any alteration of morphology, functional capacity, growth, development or lifespan of the target organism distinguishable from those observed in normal (control) organisms of the same species and strain under the same defined conditions of exposure;
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No observed adverse effect level means the highest exposure level of a chemical at which no harmful effects have been seen in research and scientific studies, and which represents the common benchmark used by the federal environmental protection agency and the food and drug administration for risk classification and assessment of chemicals, including pesticides. “Playground” means an outdoor area open to the public where children play, which contains play equipment such as a sliding board, swing, jungle gym, or see-saw, or which is designated as a play area.
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