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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

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]
Farlex Partner Medical Dictionary © Farlex 2012

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.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
[16] Delgado G.E., Quintero E., Tovar R., Grima-Gallardo P., Quintero M.: "Synthesis and crystal structure of the quaternary compound [AgFe.sub.2][GaTe.sub.4]", Journal of Alloys and Compounds, Vol.
On the contrary, the deep limestone groundwater accounts for less than 20%, which is close to that of the Quaternary groundwater.
A new intensive peak at 1688.35 [cm.sup.-1]appeared probably to the ethyl groups of the quaternary triethyl ammonium groups of Quat.
Carugo, "A structural proteomics filter: prediction of the quaternary structural type of hetero-oligomeric proteins on the
The issue of the Lithuanian Stratigraphic Guide (LSG) provides a general approach (Grigelis, 2002) that makes up for the scant reference to the Quaternary made by the International Stratigraphic Guide (ISG).
Due to thermal exposure, "OH" peak intensity (~3,400 [cm.sup.-1]) is found to increase (figure 3a) in exposed specimens of the quaternary blend.
However, limited work has been conducted on the Yukon Coastal Plain or Herschel Island in recent years, and there is no definitive model of how the Quaternary deposits found there correlate with those from other areas covered by the northwest margin of the LIS.
The system supports improved understanding and management of a wide range of biomolecule applications, including: optimizing sample and storage conditions; verifying the quaternary structure of protein complexes; identifying thermal characteristics; and assessing protein solubility and sample purity.
The climatic cycles of the Quaternary show periodicity related to Milankovitch orbital variations, but paleotemperature estimates from Antarctic ice cores show a strong correlation with abundance of carbon dioxide in the cores.
The compatibilization is more pronounced for the quaternary blend, thus confirming that PBO acts as a compatibilization promoter by enhancing the CP effectiveness of EAA.
In addition to lithology and mineralogy of glacial deposits mentioned above, the published results include those on stratigraphy of Quaternary sediments, topography of Estonian bedrock, evolution and geomorphology of the Quaternary cover, evolution of the Baltic Sea and its ancient coastal formations, distribution of erratic boulders, development of large lakes, protection and complex use of Estonian mineral resources, environmental history, and nature protection.