The field of chemistry uses analysis in at least three ways: to identify the components of a particular chemical compound ( qualitative analysis ), to identify the proportions of components in a mixture ( quantitative analysis ), and to break down chemical processes and examine chemical reactions between elements of matter.

In organic chemistry, an alkene, olefin, or olefine is an unsaturated chemical compound containing at least one carbon-to-carbon double bond.

* 8-Anilinonaphthalene-1-sulfonate, a chemical compound

Amyl alcohol as a distinct chemical compound refers to pentan-1-ol.

* Binary compound, a chemical compound containing two different chemical elements

A compound is a substance with a particular ratio of atoms of particular chemical elements which determines its composition, and a particular organization which determines its chemical properties.

When two distinct elements are chemically combined, with the atoms held together by chemical bonds, the result is termed a chemical compound.

Two thirds of the chemical elements occur on Earth only as compounds, and in the remaining third, often the compound forms of the element are most common.

A cyanide is a chemical compound that contains the cyano group ,-C ≡ N, which consists of a carbon atom triple-bonded to a nitrogen atom.

A carbon sink is a natural or artificial reservoir that accumulates and stores some carbon-containing chemical compound for an indefinite period.

In a substitution reaction, a functional group in a particular chemical compound is replaced by another group.

* List of CAS numbers by chemical compound

Chemical affinity can also refer to the tendency of an atom or compound to combine by chemical reaction with atoms or compounds of unlike composition.

Methanides in general chemical context refers to any compound that hydrolyzes to methane, which might include also salts with hydrogenated anions such as,, and.

TNT is a specific chemical compound called 2, 4, 6-trinitrotoluene.

* Ethylene dione ( ethylenedione, ethene dione, or ethene 1, 2-dione ), a hypothetical chemical compound with the formula C2O2 ( O = C = C = O )

In chemistry, the empirical formula of a chemical compound is the simplest positive integer ratio of atoms of each element present in a compound.

Whether this abnormal TSH differs chemically from pituitary TSH, or is, alternatively, normal TSH with its period of effectiveness modified by some other blood constituent, cannot be decided without chemical study of the activity in the blood of these patients and a comparison of the substance responsible for the blood activity with pituitary Aj.

The chief factors responsible for the spoilage of fresh foodstuffs are ( 1 ) microorganisms such as bacteria, molds, and yeasts, ( 2 ) enzymes, ( 3 ) insects, ( 4 ) sprouting, and ( 5 ) chemical reactions.

It is continued internally by positive ions flowing into the electrolyte from the anode, i. e., away ( surprisingly ) from the more negative electrode and towards the more positive one ( chemical energy is responsible for this " uphill " motion ).

This book was responsible for supplanting the chemical affinity for the term free energy in the English-speaking world.

However, Aspdin's methods were " rule-of-thumb ": Vicat is responsible for establishing the chemical basis of these cements, and Johnson established the importance of sintering the mix in the kiln.

This outward current is carried internally by positive ions moving from the electrolyte to the positive cathode ( chemical energy is responsible for this " uphill " motion ).

In organic chemistry, functional groups are lexicon-specific groups of atoms or bonds within molecules that are responsible for the characteristic chemical reactions of those molecules.

It was understood that chemical chain reactions were responsible for exponentially increasing rates in reactions, such as produced chemical explosions.

* Toxicophore, feature or group within a chemical structure that is thought to be responsible for the toxic property

The chemical in chili peppers responsible for the burning sensation is capsaicin.

* Steviol glycoside, the chemical responsible for the sweetness

Chlorofluorocarbons ( CFCs ) and other halogenated ozone depleting substances ( ODS ) are mainly responsible for man-made chemical ozone depletion.

Based on the processes responsible for their formation, sedimentary rocks can be subdivided into four groups: clastic sedimentary rocks, biochemical ( or biogenic ) sedimentary rocks, chemical sedimentary rocks and a fourth category for " other " sedimentary rocks formed by impacts, volcanism, and other minor processes.

For states eligible for this assurance, the United States would not use nuclear weapons in response to a chemical or biological attack, but states that those responsible for such an attack would be held accountable and would face the prospect of a devastating conventional military response.

Their chemical and physical stability has also been responsible for their continuing persistence in the environment, and the lingering interest decades after regulations were imposed to control environmental contamination.

Chief nuclear reactions responsible for the abundance of the chemical elements | relative abundances of light atomic nucleus | atomic nuclei observed throughout the universe.

According to Smithsonian curator Dr. Jeffrey Post, the element boron may be responsible for causing the blue color of the stones after tests using infrared light measured a chemical spectrum of the gems.

Receptors for serotonin show a high affinity for cathinone suggesting that this chemical is responsible for feelings of euphoria associated with chewing khat.

The specific impurity ( or impurities ) responsible for the toxic effects was never firmly established, however two compounds, EBT ( 1, 1 '- ethylidene-bis-L-tryptophan, popularly known as " Peak E ") and MTCA ( 1-methyl-1, 2, 3, 4-tetrahydro-beta-carboline-3-carboxylic acid ), which are close chemical relatives of L-tryptophan were implicated.

Primary surface processes responsible for most topographic features include wind, waves, chemical dissolution, mass wasting, groundwater movement, surface water flow, glacial action, tectonism, and volcanism.

Some find the smell offensive as acetone is the same chemical responsible for the smell in paint thinner and nail polish remover.

: The 53 WG is headquartered at Eglin and serves as the Air Force ’ s focal point for operational test and evaluation of armament and avionics, aircrew training devices, chemical defense, aerial reconnaissance improvements, electronic warfare systems, and is responsible for the QF-4 Phantom II Full Scale Aerial Target ( FSAT ) program and subscale drone programs ( located at Tyndall Air Force Base, Florida ).

The relative abundance of chemical elements detected indicated that the object responsible was definitely a comet.

During the decade that followed, the common man, as that piece put it, grew uncomfortable as the Voice of God and fled from behind Saint Woodrow ( Wilson ) only to learn from Science, to his shocked relief that after all there was no God he had to speak for and that he was just an animal anyhow -- that there was a chemical formula for him, and that too much couldn't be expected of him.

and General Motors and Du Pont were to be ordered to terminate any agreement that provided for the purchase by General Motors of any specified percentage of its requirements of any Du Pont manufactured product, or for the grant of exclusive patent rights, or for a grant by General Motors to Du Pont of a preferential right to make or sell any chemical discovery of General Motors, or for the maintenance of any joint commercial enterprise by the two companies.

Even here there is room for some variation, for metal surfaces vary in smoothness, absorptive capacity, and chemical reactivity.

The aim is to collect a very broad range of physical, chemical, morphological, and structural data for crystals on an encyclopedic scale and to seek all possible useful and revealing correlations of properties with internal structure.

Because individual classes of foods differ in their requirements for preservation, a number of methods have been developed over the years involving one or a combination of procedures such as dehydration, fermentation, salting, chemical treatment, canning, refrigeration, and freezing.

The process in which the outcome of any one stage is known only statistically is also of interest, although for chemical reactor design it is not as important as the deterministic process.

Significantly, Huxley also worked for a time in the 1920s at the technologically advanced Brunner and Mond chemical plant in Billingham, Teesside, and the most recent introduction to his famous science fiction novel Brave New World ( 1932 ) states that this experience of " an ordered universe in a world of planless incoherence " was one source for the novel.

Hence it is the atomic number alone that determines the chemical properties of an element ; and it is for this reason that an element can be defined as consisting of any mixture of atoms with a given atomic number.

In the 17th and 18th centuries, chemists provided a physical basis for this idea by showing that certain substances could not be further broken down by chemical methods.

The higher value for alpha radiation is generally attributable to the high linear energy transfer ( LET ) coefficient, which is about one ionization of a chemical bond for every angstrom of travel by the alpha particle.

For substances which have two ( or more ) stable crystalline forms, such as diamond and graphite for carbon, there is a kind of " chemical degeneracy ".

Compounds that are still isolated from living organisms are the aminoglycosides, whereas other antibacterials — for example, the sulfonamides, the quinolones, and the oxazolidinones — are produced solely by chemical synthesis.

* Acetylsalicylic acid, the chemical name for the analgesic trademarked as Aspirin

The copper does not react, functioning as an electrode for the chemical reaction.

In France, Santo Daime won a court case allowing them to use the tea in early 2005 ; however, they were not allowed an exception for religious purposes, but rather for the simple reason that they did not perform chemical extractions to end up with pure DMT and harmala and the plants used were not scheduled.