zwitterion


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Related to zwitterion: isoelectric point

zwit·ter·i·on

 (zwĭt′ər-ī′ən, swĭt′-, tsvĭt′-)
n.
A molecule, especially an amino acid, containing a positively charged ion at one end and a negatively charged ion at the other.
[German : Zwitter, hybrid (from Middle High German zwitarn, from Old High German, from zwi-, twice; see dwo- in Indo-European roots) + Ion, ion (from Greek; see ion).]
zwit′ter·i·on′ic (-ī-ŏn′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

zwitterion

(ˈtsvɪtərˌaɪən)
n
(Chemistry) chem an ion that carries both a positive and a negative charge
[C20: from German Zwitter hermaphrodite + ion]
zwitterionic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

zwit•ter•i•on

(ˈzwɪt ərˌaɪ ən, ˈswɪt-, ˈtsvɪt-)

n.
an ion with both a positive and a negative charge.
[< German Zwitterion (1897) =Zwitter hybrid, hermaphrodite + Ion ion]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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References in periodicals archive ?
GLYP and AMPA are considered to exhibit low mobility in soils due to their zwitterion nature and supposed strong sorption to the soil matrix (Sprankle et al., 1975).
LABORATORY SIMULATION STUDIES OF LEACHING OF THE PRIORITY PESTICIDES AND THEIR TRANSFORMATION PRODUCTS IN SOILS
The attachment of PEG with [Gd.sub.n.sup.3+]-CNT was performed via a thermal reaction and zwitterion interaction between oxidized CNT carboxylic groups and terminated amines in PEG.
[Gd.sub.n.sup.3+]@CNTs-PEG versus Gadovist[R]: In Vitro Assay
10,065,922 with 126 claims, directed to solid solabegron zwitterion.
Velicept Therapeutics Raises an Additional USD 15m in series B Round, Initiates Phase 2b Study, Receives Issuance of US Patent
The resulting solid zwitterion was recovered by filtration and washed with ethyl acetate to completely remove the unreacted reactant and then dried at 60[degrees]C under vacuum overnight.
Optimization of Process Variables in the Synthesis of Tributyl Citrate Using a Polyvinylpolypyrrolidone-Supported Bronsted Acidic Ionic Liquid Catalyst
[T.sub.g] of spray-dried trileucine is reliant on pH and can be associated with amount of anion, cation, and zwitterion strength in solution.
Imagine the Superiority of Dry Powder Inhalers from Carrier Engineering
Generally, because of the presence of an a-amino acid moiety, a zwitterion contribution is considered.
Enthalpies of Combustion and Formation of Histidine Stereoisomers
These functional groups can exist as cation, zwitterion or anion species, depending on the pH of the solution [3].
SIMULTANEOUS DETECTION OF TETRACYCLINE AND ITS DEGRADATION BYPRODUCTS USING LIQUID CHROMATOGRAPHY-MASS SPECTROMETRY WITH DUAL IONIZATION SOURCE
The results of previous works reveal that the zwitterion mechanism developed by Caplow [21] and Danckwerts [22] is acceptable for this reaction [11]:
Investigations on the ability of di-isopropanol amine solution for removal of C[O.sub.2] from natural gas in porous polymeric membranes

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