chemical agent

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Related to chemical agent: biological agent, Chemical warfare agent

chemical agent

any chemical power, active principle, or substance that can produce an effect in the body by interacting with various body substances, such as aspirin, which produces an analgesic effect.


1. any power, principle or substance by which something is accomplished, or which is capable of producing a chemical, physical or biological effect such as a disease.
2. of disease; any factor whose excessive presence or relative absence is essential for the occurrence of a disease.

adrenergic neuron blocking agent
one that inhibits the release of norepinephrine from postganglionic adrenergic nerve endings.
alkylating agent
a cytotoxic agent, e.g. a nitrogen mustard, which is highly reactive and can donate an alkyl group to another compound. Alkylating agents inhibit cell division by reacting with DNA and are used as antineoplastic agents.
anesthetic agent
substance capable of producing reversible general or local anesthesia.
anticholinergic agent
cholinergic blocking agent.
agent change
change in an animal's chemical or antigenic configuration can alter its pathogenicity. For example, a case of nitrate-nitrite poisoning in a cow can become a case of nitrite poisoning after conversion of the nitrate in the rumen. Mutation and antigenic drift are other types of change that vary agent pathogenicity.
chelating agent
a compound that combines with metals to form weakly dissociated complexes in which the metal is part of a ring, and is used to extract certain elements from a system.
chemical agent
substance that produces change by virtue of its chemical composition and its effects on living tissues and organisms.
cholinergic blocking agent
one that blocks the action of acetylcholine at nicotinic or muscarinic receptors of nerves or effector organs.
determinant agent
only some agents are determinants of diseases in that they always cause disease, and the same disease, and the disease does not occur without the agent. Many agents require the intervention of other factors, such as anaerobicity of tissue, hepatic insufficiency or physiological stress before they can establish their pathogenicity.
ganglionic blocking agent
one that blocks cholinergic transmission at autonomic ganglionic synapses.
immobilizing agent
see neuromuscular blockade.
infectious agent
an organism able to live in or on the tissue of a living animal; may not necessarily cause disease.
agent interaction
is the interaction between precipitating and predisposing causes of disease.
oxidizing agent
a substance that acts as an electron acceptor in a chemical oxidation-reduction reaction.
agent properties
are the properties which determine the pathogenicity of the agent, the solubility and acidity or biodegradability of a chemical, the virulence, adhesiveness, resistance to antibacterial agents of bacteria and viruses and so on.
reducing agent
a substance that acts as an electron donor in a chemical oxidation-reduction reaction.
surface-active agent
a substance that exerts a change on the surface properties of a liquid, especially one, such as a detergent, that reduces its surface tension. Called also surfactant.
therapeutic agent
a substance capable of producing a curative effect in a disease state.
agent without disease
exemplified by the orphan viruses. The agent is of a type that causes disease, but none is associated with the presence of the particular agent.

Patient discussion about chemical agent

Q. How do you know when depression is chemical or situational? I've been feeling frustrated lately and while I think I show some signs of depression I think it is more a feeling down because of recent changes in my life. Every time I have seen a professional they all want to start me on some drug and having really seen no improvement over the years I swore off them years ago. When is it depression or "My life sucks right now"?

A. Thank you Johanna for sharing this with us.

Q. ADHD medications work on these brain chemicals? Hope you all know about the different types of brain chemicals, so the ADHD medications work on these brain chemicals?

A. Yes Alexzander. The active ingredients in the common ADHD medications are amphetamines. The amphetamines artificially increase the amount of certain neurotransmitters in the brain, speeding up the brain (thus the term “speed” for amphetamines). This makes the frontal area more active, at least while the drug is acting.

Q. How do you tell the difference between chemical burns, and burns from fire? Please don't spare on gross words i would like to know everything there is to burns.

A. Here is a ton of info on both-

More discussions about chemical agent
References in periodicals archive ?
The next marked improvement in chemical agent detection was the M18 Chemical Agent Detection Kit, which was first produced in 1957.
The ESC failure mechanism does not proceed through a chemical reaction between the polymer and the chemical agent.
identifying the chemical agent is a key step to determining the most
The source, who spoke on condition of anonymity, said between four and five members came into contact with chemical agents while searching a group of rebel tunnels in the Damascus suburb of Jobar over the weekend.
Emissions from the incinerators are routed through a state-of-the-art pollution abatement system, plus a multilayered carbon filtration system that is monitored to ensure that the chemical agent is not released to the atmosphere.
Familiarity with general characteristics of a covert chemical release and recognition of epidemiologic clues and syndromic presentations of chemical agent exposures could improve recognition of these releases and might reduce further morbidity and mortality.
Task Force on Biological and Chemical Agent Threats, European Commission, Luxembourg, Belgium
The joint venture will make TMAH and sell the chemical agent to customers in Asia while taking over the operations of a plant run by Showa Denko in Higashi-Nagahara, Fukushima Prefecture, northeastern Japan.
The primary purpose of the guide is to provide emergency first-responders with information to aid them in the selection and utilization of chemical agent and toxic industrial material (TIM) detection equipment.
The warning sirens--there are thirty-seven total--were put in place when the Tooele Chemical Agent Disposal Facility began the incineration process.
Mr Clinton, speaking in San Francisco to the American Society of Newspaper Editors, indicated that US intelligence has been closely watching Belgrade's chemical agent supply.

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