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 ?
Experimental Methods Synthesis of quaternary ammonium TPBs and quaternary ammonium tetrafluoroborates
Milanovsky that reviews his own work on the origin and development of ideas on Pliocene and Quaternary glaciations in northern and eastern Europe, Iceland, Caueasus and Siberia.
Disposable nonwoven wipers (designed to be compatible with quaternary amines) used in a closed-bucket system
So it is natural to construct quantum error-correcting codes from quaternary cyclic codes.
Three times (twice with colleagues) he has received the Estonian national science prize: for a series of monographs History of Geology in Estonia in 1991, for a set of publications Quaternary Geology of North-West Europe in 1996 (personal), and for a series of monographs about Lake Peipsi in 2003.
These products are typically more efficacious than the quaternary disinfectants because they are formulated to be effective against TB.
This interpretation of the site and its finds has required detailed reconstruction of the changing paleogeography within and beyond the cave entrance and the nature and rate of geomorphological processes operating within the region, which have been placed within models for rapid Quaternary environmental change.
Proxy records of neotectonics, climate changes and anthropogenic activity in the Late Quaternary of Ganga plain.
I could find nothing about quaternary ammonia being used for pain relief but it is used as a disinfectant everywhere from meat packing plants to hospitals.
Mycobacteria are also quite resistant to agents used for surface and instrument disinfection, including quaternary ammonium compounds, phenolics, iodophors, and glutaraldehyde (16,22,23,36) and can degrade the disinfectant morpholine (20).
where a person with SARS, including quaternary ammonium, phenol-based products, ethanol-based products and chlorine-based products.
It appears that this quaternary salt is absorbed because of its in vivo activity.