Use Chemical warfare ( CW ) involves using the toxic properties of chemical substances as weapons.

There is archaeological evidence of the use of psychoactive substances (mostly plants) dating back at least 10,000 years, and historical evidence of cultural use over the past 5,000 years.

Recreation Many psychoactive substances are used for their mood and perception altering effects, including those with accepted uses in medicine and psychiatry.

Lethality Chemical weapons are said to make deliberate use of the toxic properties of chemical substances to inflict death .

Some substances may have controlled or illegal uses while others may have shamanic purposes, and still others are used medicinally.

Besides nutritional items, other substances which may be ingested include medication (where ingestion is termed oral administration), recreational drugs, and substances considered inedible such as foreign bodies or excrement.

The distinction comes from the use in homeopathy of substances that are meant to cause similar effects as the symptoms of a disease to treat patients ( homeo meaning similar).

Chemists use this knowledge to learn the composition, and properties of unfamiliar substances, as well as to reproduce and synthesize large quantities of useful naturally occurring substances and create new artificial substances and useful processes.

Drug rehabilitation aims to break this cycle of dependency, through a combination of psychotherapy, support groups, maintenance and even other psychoactive substances.

All the cells have a single nucleus and membrane.

That is, these ions are identical on both the reactant and product side of the chemical equation.

When asked if he had taken steroids he was heard to reply, I can't tell you that I haven't, but you'll never prove that I have.

A student hurt by a bomb blast in his face this morning

He also discovered that ferromagnetic substances exhibited a critical temperature transition, above which the substances lost their ferromagnetic behavior.

See also Autotroph Heterotroph Lithotroph Trophic pyramid Predator prey interaction References

The right atrium is the upper chamber of the right side of the heart.

Methods of deployment The chief method of deployment of Greek fire, which sets it apart from similar substances, was its projection through a tube ( siphōn ), for use aboard ships or in sieges.

This increases the blood volume and blood pressure.

I would like to know how these substances are absorbed by the body.

... Loss of renal concentrating ability is a direct result of hypercalcemia.

Antigens are substances capable of provoking the formation of antibodies.

We will not need to add artificial substances to our food.

These chemicals can be detected and analyzed by urinalysis.

Chemists carefully measure substance proportions, reaction rates, and other chemical properties.

The United Nations and other agencies have aimed to reduce the level of radiation in affected areas, especially through the use of caesium binders and rapeseed cultivation, which are meant to decrease soil levels of caesium 137.

As used by homeopaths, the term allopathy has always referred to the principle of curing disease by administering substances that produce other symptoms (when given to a healthy human) than the symptoms produced by a disease.

I don't believe that chemicals are unnatural.

Water and mineral salts are inorganic substances.

vulcanii (Leandri) Ursch Leandri 1955 Gallery References

Both urine and blood tests were used to detect banned substances.

The efforts of the translators were succeeded by that of the encyclopaedists.

The first step in urine formation is the filtration of blood in the kidneys.

The girls did not take any dangerous substances during the film.

But Folkman persevered, and eventually he proved that such chemical substances do exist.

There's a chance that tap water may contain harmful substances like chlorine and lead.

The basic function of the cell membrane is to protect the cell from its surroundings.

Each vibrational mode will contribute formula_64 to the total molar heat capacity, however.

All of these substances persist in the environment, being slowly, if at all, degraded by natural processes.

This elaborate circuit made out of thousands of different kinds of cell is being bathed in a substance.

Using those intellectual filters, we eliminated 7,962. We were left with 38 chemicals.

So, and you get all the disease protective substances.

Very complex processes with very complex chemicals that fit into very complex receptors.

Piperonal and other substances affect the odor of natural vanilla.

These substances were highly unstable and were not practical explosives.

We banned those chemicals, and we replaced them, unknowingly, with other substances that, molecule per molecule, are a hundred times more potent as heat trapping, greenhouse gases than carbon dioxide.