Substances in a sentence

The Controlled Substances Act, or CSA, was enacted to ensure intense governmental regulation for every step of the handling of controlled substances, from their manufacture to eventual use, officials said.

The bill decriminalizes marijuana, removing it from the list of scheduled substances under the Controlled Substances Act, and eliminates criminal penalties for an individual who manufactures, distributes, or possesses cannabis.

Because nobody has ever used both substances at once, nor has anyone ever marketed both substances at once to the same people.

The placenta has an essential and highly complex task: it must ensure the exchange of important substances between the mother and her unborn child, whilst simultaneously blocking other substances from passing through.

A chemical reaction is a transformation of some substances into one or more different substances.

Acidic substances reduce the absorption of amphetamine and increase urinary excretion, and alkaline substances do the opposite.

All individuals and firms that are registered are required to maintain complete and accurate inventories and records of all transactions involving controlled substances, as well as security for the storage of controlled substances.

All of the ozone depleting substances controlled by the Montreal Protocol contain either chlorine or bromine (substances containing only fluorine do not harm the ozone layer).

CFCs and other contributory substances are referred to as ozone-depleting substances (ODS).

Different substances absorb light at different wavelengths, and when the spectrum for a specific object is unravelled, dark lines (called absorption lines ) appear where the substances within it have absorbed that particular wavelength of light.

Diffusion is a property of substances in water; substances in water tend to move from an area of high concentration to an area of low concentration.

Endocytosis refers to when substances are taken into the cell, whereas for exocytosis substances are moved from the cell into the extracellular space.

Exogenous substances (metabolic ataxia) Exogenous substances that cause ataxia mainly do so because they have a depressant effect on central nervous system function.

He also noticed that electrified substances attracted all other substances indiscriminately, whereas a magnet only attracted iron.

He believed that acids were substances that produce hydrogen ions in solution and that bases were substances that produce hydroxide ions in solution.

However, this definition only works well for substances that are composed of molecules, which is not true of many substances (see below).

If the substances are at the same temperature and pressure, there is no net exchange of heat or work – the entropy change is entirely due to the mixing of the different substances.

Many substances besides metals discharge negative electricity under the action of ultraviolet light: lists of these substances will be found in papers by G. C. Schmidt Schmidt, G. C. (1898) Wied.

Modern advocates of homeopathy have proposed a concept of " water memory ", according to which water "remembers" the substances mixed in it, and transmits the effect of those substances when consumed.

Pharmacognosy Pharmacognosy is a branch of pharmacology dealing especially with the composition, use, and development of medicinal substances of biological origin and especially medicinal substances obtained from plants.