" Fleming grew the mould in a pure culture and found that it produced a substance that killed a number of disease-causing bacteria.

A molecule is the smallest indivisible portion of a pure chemical substance that has its unique set of chemical properties, that is, its potential to undergo a certain set of chemical reactions with other substances.

A chemical element is a pure chemical substance consisting of one type of atom distinguished by its atomic number, which is the number of protons in its nucleus.

Air is often seen as a universal power or pure substance.

* Chemical element, a pure substance consisting of one type of atom

An oxidizer is a pure substance ( molecule ) that in a chemical reaction can contribute some atoms of one or more oxidizing elements, in which the fuel component of the explosive burns.

For a system consisting of vapor and liquid of a pure substance, this equilibrium state is directly related to the vapor pressure of the substance, as given by the Clausius-Clapeyron relation:

Inside the evacuated tube, electrons were fired at a metallic substance ( i. e. a sample of pure element in Moseley's work ), causing the ionization of electrons from the inner electron shells of the element.

It is better to abandon such concepts as ' pure substance ' or ' solute ' is such cases and speak of phases instead.

A simple system is for the present article defined as one that consists of a single phase of a pure chemical substance, with no interior partitions.

For exacting work, triple point cells are typically filled with a highly pure chemical substance such as hydrogen, argon, mercury, or water ( depending on the desired temperature ).

The mole is a unit of measurement used in chemistry to express amounts of a chemical substance, defined as an amount of a substance that contains as many elementary entities ( e. g., atoms, molecules, ions, electrons ) as there are atoms in 12 grams of pure carbon-12 (< sup > 12 </ sup > C ), the isotope of carbon with atomic weight 12.

, the mole is defined by BIPM to be an amount of a substance that contains as many elementary entities ( e. g. atoms, molecules, ions, electrons ) as there are atoms in 12 grams of pure carbon-12 (< sup > 12 </ sup > C ), the isotope of carbon with atomic weight 12.

Thus, by definition, one mole of pure < sup > 12 </ sup > C has a mass of exactly 12 g. It also follows from the definition that X moles of any substance will contain the same number of molecules as X moles of any other substance.

For example, if the two components differ only in isotopic content, then the vapor pressure of each component ( i ) will be equal to the vapor pressure of the pure substance times the mole fraction in the solution.

For a pure substance in solution, if the color and path length are fixed and the specific rotation is known, the observed rotation can be used to calculate the concentration.

The melting point of a pure substance is always higher and has a smaller range than the melting point of an impure substance or, more generally, of mixtures.

# For a pure substance in a condensed state ( a liquid or a solid ): the pure liquid or solid

Nor is nature to be confounded with created substance, or with matter as it exists in space and time ; it is pure non-being, the mere otherness ( alteritas ) of God — his shadow, desire, want, or desiderium sui, as it is called by mystical writers.

Most of them sincerely believe that the Anglo-Saxon is the best race in the world and that it should remain pure.

It is the abstractionism, the unrealism, of the pure idealist.

This is a straightforward denial of the spiritual world and a vigorous defense of pure materialism.

This is a varmint load, pure and simple ; ;

The sentimental pure heart of Galahad is gone with the knightly years, but I still believe in the heart of the George Meredith character that was not made of the stuff that breaks ''.

In the over-all process, it is difficult to assign a `` pure '' role to each constituent of a built-detergent formulation ; ;

This does not necessarily mean that such teachers will favor vocational education, as contrasted with liberal education, but they are likely to favor an approach to liberal education which has a maximal vocational-advancement value, as against a kind of `` pure '' liberal education that is not designed to help people get better jobs.

There is no doubt that higher education since World War 2, has moved away from `` pure '' liberal education toward greater emphasis on technology and specialization.

Technique pure and simple, rendition, is not of major importance, but it is interesting that Parker, following Lester Young, was one of the leaders of the so-called saxophone revolution.

The aesthetic appeal of pure paint laid on at random may exist, but it is a very impoverished appeal.

Often work of this sort is presented as calligraphy -- the pure utterance of the brush stroke seeking only absolute painteresque values.

Libyan Desert silica-glass, another natural glass, is composed of nearly pure silica and has the same trace germanium content as sands in the area.

Net result is some crazy-wonderful nonsense, part of which can be classed as pure slapstick.

There is no corresponding right to a writ in any pure or continental civil law legal systems, though some mixed systems such as Quebec recognize these prerogative writs.

An example of a " pure " abjad is ancient Phoenician.

Therefore, pure antimony is not used to make hard objects: coins made of antimony were issued in China's Guizhou province in 1931, but because of their rapid wear, their minting was discontinued.

He is well known for having given a series of lectures in which he championed a pure form of Christian doctrine and chastised his audience about their laxity.

Unlike pure metals, most alloys do not have a single melting point, but a melting range in which the material is a mixture of solid and liquid phases.

We will make a few simplifying assumptions: that the uncompressed volume of the cylinder is 1000cc's ( one liter ), that the gas within is nearly pure nitrogen ( thus a diatomic gas with five degrees of freedom and so

The Anticlaudianus, a treatise on morals as allegory, the form of which recalls the pamphlet of Claudian against Rufinus, is agreeably versified and relatively pure in its latinity.

In Japan, because of intermarriage over many years with Japanese, the concept of a pure Ainu ethnic group is no longer feasible.

For Arthur Schopenhauer aesthetic contemplation of beauty is the most free that the pure intellect can be from the dictates of will ; here we contemplate perfection of form without any kind of worldly agenda, and thus any intrusion of utility or politics would ruin the point of the beauty.

Some Latter-day Saints believe that the Adamic language is the " pure language " spoken of by Zephaniah and that it will be restored as the universal language of humankind at the end of the world.