A chemical substance is a material with a specific chemical composition. A common example of a chemical substance is pure water; it has the same properties and the same ratio of hydrogen to oxygen whether it is isolated from a river or made in a laboratory.
A provocation test, also called a provocation trial or provocation study, is a form of clinical trial whereby participants are exposed to either a substance or "thing" that is claimed to provoke a response, or to a sham substance or device that should provoke no response.
All, all is theft, all is unceasing and rigorous competition in nature; the desire to make off with the substance of others is the foremost - the most legitimate - passion nature has bred into us and, without doubt, the most agreeable one. Marquis de Sade
An element is a chemical substance that is made up of a particular kind of atoms and hence cannot be broken down or transformed by a chemical reaction into a different element, though it can be transmutated into another element through a nuclear reaction.
And you have to remember that I came to America as an immigrant. You know, on a ship, through the Statue of Liberty. And I saw that skyline, not just as a representation of steel and concrete and glass, but as really the substance of the American Dream. Daniel Libeskind
As a child, what captivated me was reading the poems myself and realizing that there was a world without material substance which was nevertheless as alive as any other. Mary Oliver
As for the Pope, I am too old to be frightened by his shadow, and am quite sure his shadow or Substance will do less harm to the liberties of my country than will a party, who seek to acquire political power by exciting religious bigotry in the minds of their duped followers. Ezra Cornell
As our bodies live upon the earth and find sustenance in the fruits which it produces, so our minds feed on the same truths as the intelligible and immutable substance of the divine Word contains. Nicolas Malebranche
