The presence of substances in the soil or in the above ground atmosphere that inhibit the growth of plants and ultimately causes their death. ___________________________________________________________________________________________________ ___________________________________________________________________________________________________
the ability of a substance to produce injury once it reaches a susceptible site in or on the body. A chemical that has a median lethal dose (LD50) of more than 50 milligrams per kilogram but not more than 500 milligrams per kilogram of body weight when administered orally to albino rats weighing between 200 and 300 grams each. A chemical that has a median lethal dose (LD50) of more than 200 milligrams per kilogram but not more than 1000 milligrams per kilogram of body weight when administered by continuous contact for 24 hours (or less if death occurs within 24 hours) with the bare skin of albino rabbits weighing between two and three kilograms each. A chemical that has a median lethal concentration (LC50) in air of more than 200 parts per million but not more than 2,000 parts per million by volume of gas or vapor, or more than two milligrams per liter but not more than 20 milligrams per liter of mist, fume, or dust, when administered by continuous inhalation for one hour (or less if death occurs within one hour) to albino rats weighing between 200 and 300 grams each.
Levels of harmful ingredients in paint such as solvent s and heavy metals including lead and chrome. All Humbrol paint s confirm to current legislation and safety data sheets can be obtained by contacting Humbrol.
Much of the information regarding the toxicity of Essential Oils is passed along from research that may or may not have been done with Essential Oils themselves. However, with the lack of better information, it is probably wise to exercise caution with oils that are considered toxic. The affects of toxicity from Essential Oils are of a longer term nature and do not manifest themselves immediately. Our bodies have the natural ability to rid itself of toxins, yet if a toxin is repeatedly brought into the body it can break down our natural systems and cause a build-up of any harmful substance. To be safe, only use toxic oils sparingly and do not use them continuously over long periods of time.
Degree of harmful affects an element or compound may have on a living organism, plant, or animal. Excessive amount of toxic substances, such as sodium or sulfur that severely hinder establishment of vegetation or severely restrict plant growth.
The degree to which a substance may be harmful or poisonous to the body. The toxicity of a medication may often be seen in its side effects. In clinical trials, researchers study the toxicity of anticancer medications.
the degree to which a chemical substance elicits a deleterious or adverse effect upon the biological system of an organism exposed to the substance over a designated time period. [Source: USEPA Glossary of IRIS Terms
Characteristic of a substance which induces intoxication, i.e., “poisoning”. Many substances, including some common foods, have some level of toxicity. Cannabis presents almost no toxicity and cannot lead to an overdose. United Nations Drug Control Program (UNDCP) Established in 1991, the Programme works to educate the world about the dangers of drug abuse. The Programme aims to strengthen international action against drug production, trafficking and drug-related crime through alternative development projects, crop monitoring and anti-money laundering programmes. UNDCP also provides accurate statistics through the Global Assessment Programme (GAP) and helps to draft legislation and train judicial officials as part of its Legal Assistance Programme. UNDCP is part of the UN Office for Drug Control and the Prevention of Crime.
Negative effect of a compound, as shown by altered morphology or physiology. It is meaningful only when the effect itself is also described, such as changes in the rate of cell growth, cell death, etc.
The property of a chemical, or combination of chemicals, to adversely affect organisms, tissues or cells (ASTM, 2002). Toxicity Identification Evaluation (TIE): A set of procedures used to identify the specific compounds causing effluent toxicity (EPA, 2000).
Having to do with poison or something harmful to the body. Toxic substances usually cause unwanted side effects to an organ system and/or to the participant's subjective status produced by therapy. Toxicities are graded numerically, with the lowest number representing no toxicity (e.g., 0 = none) and the highest number highest representing lethal toxicity (e.g., 5 = lethal).
(l) The capacity or property of a substance to cause adverse effects. (2) The specific quantity of a substance which may be expected, under specific conditions, to do damage to a specific living organism.
(Toxicité) Property of a substance to poison a living organism, generally expressed as the ratio between the minimum dose capable of killing an animal and its total weight.(Translated from Manuila, A. et al. Dictionnaire français de médecine et de biologie, Masson, Paris, 1981.)
Capacity to cause injury to a living organism defined with reference to the quantity of substance administered or absorbed, the way in which the substance is administered (inhalation, ingestion, topical application, injection) and distributed in time (single or repeated doses), the type and severity of injury, the time needed to produce the injury, the nature of the organism(s) affected and other relevant conditions. Adverse effects of a substance on a living organism defined with reference to the quantity of substance administered or absorbed, the way in which the substance is administered (inhalation, ingestion, topical application, injection) and distributed in time (single or repeated doses), the type and severity of injury, the time needed to produce the injury, the nature of the organism(s) affected, and other relevant conditions. Measure of incompatibility of a substance with life: this quantity may be expressed as the reciprocal of the absolute value of median lethal dose (1/LD50) or concentration (1/LC50) RT acute toxicity, chronic toxicity, subacute toxicity, subchronic toxicity
The toxicity of a chemical can be measured using a of animal studies. OSHA uses three categories for this: Oral LD50 - Lethal dose 50% test. The medium lethal dose (LD50) that kills 50% of lab animals receiving it. Oral LD50 is expressed as milligrams of chemical per kilogram (mg/kg) of test animals body weight, or 1 millionth of the test animal's body weight. OSHA considers a chemical to be toxic if the oral LD50 is between 50 mg/kg and 500 mg/kg. Skin LD50 - A dose that kills 50% of lab animals that had concentrations applied directly to their bare skin for 24 hours. Skin LD50 is also expressed in mg/kg, and the OSHA considers a chemical to be toxic if the LD50 is between 200 mg/kg and 1000 mg/kg. Inhalation LC50 - Lethal concentration 50% is the concentration of a chemical in the air needed to kill 50% of lab animals that breathed it. LC50 is expressed in parts per million (ppm) for bases and vapors, and milligrams/liter (mg/l) for mists, fumes and dusts.
Excessive amount of toxins, drugs, and chemical substances in the body.
The adverse reactions (dose-response time relationships) of tissues to selected foreign substances resulting in unacceptable in-vivo interactions. The toxicity can be at the local or systemic level depending upon the amount, rate of release and specific type of substance available to the tissues.
The degree to which a substance or mixture of substances can harm humans or animals. Acute toxicity involves harmful effects in an organism through a single or short-term exposure. Chronic toxicity is the ability of a substance or mixture of substances to cause harmful effects over an extended period, usually upon repeated or continuous exposure sometimes lasting for the entire life of the exposed organism. Subchronic toxicity is the ability of the substance to cause effects for more than one year but less than the lifetime of the exposed organism.
The degree to which a chemical substance elicits a deleterious or adverse effect upon the biological system of an organism exposed to the substance over a designated time period. This definition archived 9/30/03
Toxicity is a measure of the degree to which something is toxic or poisonous. The study of poisons is known as toxicology. Toxicity can refer to the effect on a whole organism, such as a human or a bacterium or a plant, or to a substructure, such as a cell (cytotoxicity) or the liver (hepatotoxicity).
Toxicity is System of a Down's second album release. Produced by Rick Rubin, Toxicity was recorded in 2001 and released on September 4, 2001 by American Recordings, debuting at #1 on both the United States and Canadian charts.
This usually refers to the toxic element of waterborne wastes, and the toxic elements may comprise of metals, pesticides, or other chemicals which cause pollution of streams, watercourses, rivers, beach's, or ground water.
A U.S. EPA hazardous waste characteristic defined with a rigorous test procedure, the TCLP (for Toxicity Characteristic Leaching Procedure). In the procedure, a waste is extracted for 24 hours with an acetic acid solution. The acid extract is then analyzed for the presence of any of the contaminants listed in the procedure.
All glycol based coolant are toxic; ethylene glycol coolant is more toxic than propylene glycol coolant. In addition used coolants can contain dissolved metals from corrosion of cooling system components which increase toxicity.
Many butterfly species in the world are toxic to the many predators which prey on them. Often the butterflies collect these toxins slowly from their host-plants as they are feeding in the larvae stage, and upon becoming adults are toxic to the predators.
Capacity to cause injury to a living system, such as a human body, or parts of the body (such as the lungs or the respiratory system); or an ecosystem. Toxicity represents the kind and extent of damage that can be done by a chemical. Toxicity in the environment may be chronic or acute, with the latter being more detectable and noticeable by people.