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 ?
There are several factors that would make chemical agent mapping possible.
The Army's chemical demilitarization program is closely watching the results of OSAGWI's work because there is a definite parallel to occupational chemical agent exposure and their risk-management practices.
The government stands firm that there has never been a "detectable emission" of a chemical agent into the environment from the Tooele facility.
On March 29, the Pine Bluff Chemical Agent Disposal Facility (PBCDF) began destruction of the Cold War-era chemical weapon stockpile stored at the Pine Bluff Arsenal.
Following a proposal by the commission, the HSC agreed on December 17, 2001, on a program for cooperation on preparedness and response to biologic and chemical agent attacks (or Health Security Programme).
TMAH is a chemical agent for use in the photographic developer used in the manufacturing of thin-film transistors for computers' liquid crystal displays and other semiconductors.
Nato strike planners have specifically avoided ordering raids on three known chemical agent storage facilities in Yugoslavia to avoid sending a deadly plume into the atmosphere, according to one senior Pentagon official, who spoke only on condition of anonymity.
Not only that, but it now appears that while PB would have been effective against soman, it does not work against sarin--the chemical agent that Saddam had in large quantities--and may actually exacerbate its effects.
com/research/5a620a/handbook_of_nuclea) has announced the addition of the "Handbook of Nuclear, Biological, and Chemical Agent Exposures" book to their offering.
4 million research and development project to develop a chemical agent resistant coating (CARC) powder topcoat for use on military vehicles and support equipment.
Then your hood won't be tight and can let in Chemical agent
The Army's first chemical agent disposal facility opened at Johnston Atoll in the Pacific in 1990 and completed its work in 2000, destroying approximately 6 percent of the Army's chemical agents.

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