quaternary


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quaternary

 [kwah´ter-nar″e, kwah-ter´nar-e]
1. fourth in a series.
2. made up of four elements or groups.

qua·ter·nar·y (Q),

(kwah'tĕr-nār'ē, kwah-tĕr'nĕ-rē),
1. Denoting a chemical compound containing four elements; for example, NaHSO4. Compare: quaternary structure.
2. Fourth in a series.
3. Relating to organic compounds in which some central atom is attached to four functional groups; applied to the usually trivalent nitrogen in its "onium" state, R4N+, "quaternary nitrogen."
4. Referring to a level of structure of macromolecules in which more than one biopolymer is present. Compare: quaternary structure.
[L. quaternarius, fr. quaterni, four each, fr. quattuor, four, + -arius, adj. suffix]

quaternary

/qua·ter·nary/ (kwah´ter-nar″e)
1. fourth in order.
2. containing four elements or groups.

quaternary

[kwot′əner′ē, kwətur′nərē]
Etymology: L, quattuor, four
1 adj, pertaining to a chemical compound in which four atoms or groups of elements are bonded to one atom, such as a quaternary ammonium compound in which four organic radicals are substituted for the four hydrogen molecules on an ammonium ion.
2 n, fourth-level structure in proteins, as in the structure of hemoglobin made up of two alpha-globulins and two beta-globulins.

qua·ter·nar·y

(kwah'tĕr-nar-ē)
1. Denoting a chemical compound containing four elements.
2. Fourth in a series.
3. Relating to organic compounds in which some central atom is attached to four functional groups.
4. Referring to a level of structure of macromolecules in which more than one biopolymer is present.

qua·ter·nar·y

(Q) (kwah'tĕr-nar-ē)
1. Denoting a chemical compound containing four elements.
2. Fourth in a series.
3. Relating to organic compounds in which some central atom is attached to four functional groups.

quaternary (kwä´turnerē),

adj having four elements. Widely used in medicine, quaternary ammonium salts are molecules containing four alkyl or aryl groups attached to a nitrogen atom.

quaternary

1. fourth in a series.
2. made up of four elements or groups.

quaternary ammonium compounds
synthetic cationic detergents commonly used as disinfectants. They act against cell wall lipids in bacteria. An example is benzalkonium chloride. Effective in teat dips for mastitis control. Called also QUATs.
quaternary structure
the arrangement of separate polypeptide subunits in the structure of a multimeric protein.
References in periodicals archive ?
1962, Dolina Sanu miedzy Solina a Zwierzyniem w czwartorzedzie (The Quaternary San valley between Solina and Zwierzyn), Prace Geograficzne Instytutu Geografii PAN, 36, 1-86.
Quaternary geologists know well that changes in ocean circulation in the Younger Dryas resulted in a brutal cooling in Europe (and Atlantic Canada
After Dave's retirement from the USGS, he began a second career of teaching and research as Distinguished Professor of Quaternary Studies at the University of Alaska at Fairbanks (UAF).
Apart from his Palaeozoic and Quaternary studies, Orviku was the initiator of the protection of non-living nature far before other people started to think the rocks needed protection.
becomes increasingly difficult as more silica and quaternary ammonium salt are added.
Quaternary level of care comprised 441 or 16% of the total number of patients, with an average stay of 9.
These forms included pyridine, amino, pyrrolic and quaternary nitrogen functionalities, which corresponded to fit peaks at 398.
Comparitive efficacy of 3rd generation quaternary ammonium compounds and formaldehyde for fumigation of operation theatres.
structural geology of the Baraboo District, Baraboo quartzite: stratigraphy and sedimentology, Cambrian geology of the Baraboo Hills, Quaternary geology of the Baraboo area, and the road log.
It enumerates methods of primordial, primary, secondary, tertiary and quaternary prevention of lipohypertrophy.
At the astronomical observatory, a seismic cellar is also located, which is underlined by the Quaternary sediments whose thickness amounts to roughly 16.