Chemical-compounds Sentence Examples

If chemical compounds can be proved by experiment to obey these laws, then the atomic theory acquires a high degree of probability; if they are contradicted by experiment then the atomic theory must be abandoned, or very much modified.

He realized that the composition by weight of chemical compounds was of the greatest moment if chemistry were to advance.

In the article Thermo Chemistry a general account of heats of formation of chemical compounds is given, and it is there shown that this constant measures the stability of the compound.

We do not yet know whether such absolute blending is possible or not, or whether all apparent blending is only a more or less minutely subdivided " mosaic " of non-combinable characters of the parents, in fact whether the combinations due to heredity in reproduction are ever analogous to chemical compounds or are always comparable to particulate mixtures.

Leber experimented with several chemical compounds to find what reaction they had on these cells; by using fine glass tubes sealed at the outer end and containing a chemical substance, and by introducing the open end into the blood vessels he found that the leucocytes were attracted - positive chemiotaxis - by the various compounds of mercury, copper, turpentin, and other substances.

It is convenient to treat these glasses as " normal " glasses, but they are in reality mixtures of silicates, and cannot rightly be regarded as definite chemical compounds or represented by definite chemical formulae.

The compounds formed in the first case, which may be either definite chemical compounds or solid solutions, are discussed under Alloys; in this place only combinations with non-metals are discussed, it being premised that the free metal takes part in the reaction.

The term "alloy" does not necessarily imply obedience to the laws of definite and multiple proportion or even uniformity throughout the material; but some alloys are homogeneous and some are chemical compounds.

But the occasional or indeed frequent existence of chemical compounds in alloys has now been placed beyond doubt.

The freezingpoint curve sometimes indicates the existence of chemical compounds.

All these cases of solution are to be distinguished from chemical compounds on the one hand, and from simple mixtures on the other.

Solutions were not distinguished from definite chemical compounds till John Dalton discovered the laws of definite and multiple proportions, but many earlier observations on the solubility of solids in water and the density of the resulting solutions had been made.

When the two components form chemical compounds with each other, the phenomena of mutual solubility become more complex.

Thus in interpreting complicated freezing point curves, we must look for chemical compounds where the curve shows a maximum, and for a eutectic or cryohydrate where two curves meet at a minimum point.

The older observers, noticing the heat effects which often accompany dissolution, regarded solutions as chemical compounds of varying composition.

This property is the liberation of some of the energy contained in the chemical compounds of the cells in such a way as to give mechanical work.

The muscle is a machine for utilizing the energy contained in its own chemical compounds.

Cements of the Portland type differ in kind from those of the pozzuolanic class; they are not mechanical mixtures of lime and active silica ready to unite under suitable conditions, but consist of definite chemical compounds of lime and silica and lime and alumina, which, when mixed with water, combine therewith, forming crystalline substances of great mechanical strength, and capable of adhering firmly to clean inert material, such as stone and sand.

The liquid and paste hardeners are chemical compounds used to harden the resins.

In the history of polarized light microscopy, one of the most popular chemical compounds studied was hippuric acid.

Fermentation, according to Pasteur, was caused by the growth and multiplication of unicellular organisms out of contact with free oxygen, under which circumstance they acquire the power of taking oxygen from chemical compounds in the medium in which they are growing.

Ether and alcohol he regarded as substances analogous to and built up on the same type as water, and he further introduced the water-type as a widely applicable basis for the classification of chemical compounds.

Pointing out that condensed types can only be fused with a radical replacing more than one atom of hydrogen, he laid the foundation of the doctrine of valency, a doctrine of incalcul able service to the knowledge of the structure of chemical compounds.

Without this vital co-factor, certain chemical compounds cannot be formed within the body.

The production of silky rayon bamboo fabrics used in high-end clothing and home decor items relies on caustic chemical compounds as part of the manufacturing process.

Weighting is the process of incorporating chemical compounds into the fabric to make it heavier.

They contain none of the chemical compounds found in chemical mattresses.

Sulfites are chemical compounds that allow for clean fermentation in the wine making process.

Inorganic-Pertaining to chemical compounds that are not hydrocarbons or their derivatives.

Surprisingly, manufacturers of tattoo ink do not have to divulge whatexactly isin it, so you, and likely your tattoo artist, may never know exactly what chemical compounds have been used to create the ink.

A soap making base lets you make your own soap without the mess and danger of mixing caustic chemical compounds like lye.