While we spend our life asking questions about the nature of cancer and ways to prevent or cure it, society merrily produces oncogenic substances and permeates the environment with them.

Sour gas is one of the most dangerous, toxic substances known to man.

Most of the oils which are valued as scents are mixtures of substances; only the combined effect of these leads to the known result.

During the 20th century, we came to understand that the essence of all substances - their colour, texture, hardness and so forth - is set by their structure, on scales far smaller even than a microscope can see. Everything on Earth is made of atoms, which are, especially in living things, combined together in intricate molecular assemblages.

It has become much more difficult to smuggle dangerous substances across our borders over the past three years, and this is creating real problems for drug traffickers.

Prohibition of substances which give pleasure to people does not work. Addiction is a health problem, not a moral one, and there are many proven strategies which can reduce its burden.

In 1976 the Toxic Substances Control Act was passed, sending the EPA on a 30-year-plus odyssey chasing down the chemical industry in a fruitless quest for responsibility.

Plainly, when perfusate from an organ or blood from an animal is used for superfusion, substances can reach the assay tissues within a few seconds of generation or release.

Liquid oxygen is one of the cheapest manufactured substances on Earth. In large quantities, it costs pennies per kilogram - cheaper than milk or beer.

Let's face it, who among us wouldn't take a pill or potion that would make us better at our job? Goodness knows, we abuse substances for just about everything in our personal lives; why not in our professional lives as well?

The Laboratory for Radioactivity consisted of only two rooms at the time; at a later date, when tests of radioactive substances became more extensive, it expanded into four rooms.

Through all of history mankind has ingested psychedelic substances. Those substances exist to put you in touch with spirits beyond yourself, with the creator, with the creative impulse of the planet.

If you're experiencing symptoms such as depression, anxiety, uncontrolled use of substances, or any other behaviors that affect your functioning, please see a professional.

Chemical compounds of carbon can exist in an infinite variety of compositions, forms and sizes. The naturally occurring organic substances are the basis of all life on Earth, and their science at the molecular level defines a fundamental language of that life.

The more the relationships of the nitrogen-rich substances to the cell nucleus were recognized, the more the question of the arrangement of the nitrogen and carbon atoms in the molecule came to stand out.

In bitter almond oil, like in a great number of other substances that previously had been counted among the 'aromatic compounds' on behalf of their strong smell, a derivative of benzene is present. The special properties of benzene and its derivatives are caused by the typical arrangement of their carbon atoms.

Keep in mind that there are many neurotoxins in the world. Dozens of natural and industrial substances have neurotoxic properties.

Classical philosophical theism maintained the ontological distinction between God and creative world that is necessary for any genuine theism by conceiving them to be of different substances, with particular attributes predicated of each.

I maintain also that substances, whether material or immaterial, cannot be conceived in their bare essence without any activity, activity being of the essence of substance in general.

Because the theory of quantum mechanics could explain all of chemistry and the various properties of substances, it was a tremendous success. But still there was the problem of the interaction of light and matter.