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Related to zwitterionic: zwitterionic buffer, zwitterionic surfactant, zwitterionic detergent


 (zwĭt′ər-ī′ən, swĭt′-, tsvĭt′-)
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.


(Chemistry) chem an ion that carries both a positive and a negative charge
[C20: from German Zwitter hermaphrodite + ion]
zwitterionic adj


(ˈzwɪt ərˌaɪ ən, ˈswɪt-, ˈtsvɪt-)

an ion with both a positive and a negative charge.
[< German Zwitterion (1897) =Zwitter hybrid, hermaphrodite + Ion ion]
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References in periodicals archive ?
Betaine (A-A-A-trimethylglycine) is a zwitterionic compound and a methyl derivative of glycine.
The oily phase has combination of one or more immiscible oils selected from sesame oil, soybean oil, canola oil, coconut oil, fractionated coconut oil, fish oil, or mineral oil, and one or more flavor oils, further comprising an organic acid selected from benzoic acid, sorbic acid, malic acid, citric acid and salicylic acid; and a surfactant selected from an anionic surfactant, a zwitterionic surfactant and a nonionic surfactant or combination thereof.
Also, the zwitterionic properties of some functional polymers, which increase the dispersibility when dissolved in a solvent at the ionic interface with electrostatic interactions of both cation and anion functional groups, may have a promising role for use in functional composite development [11].
The proposed project seeks to demonstrate that ZW800-1 (a novel zwitterionic Near Infra-Red Fluorescence (NIRF) dye), when conjugated onto a cRGD peptide, can be used to identify a minimum tumour margin distance during intra-operative image-guided surgery.
Researchers at Sichuan University and the South China University of Technology in China reported a new approach to improving the resistance of polyurethanes to proteins by introducing zwitterionic groups onto the polymer chain.
6-9) Acrylamide has the unique ability to form high-molecular weight polymers (> 1 million Da), to react with a variety of co-monomers to produce cationic, anionic, nonionic, amphoteric, or zwitterionic polymers, and to produce specialized polymers available through derivatization.
Subsequently at the second step the reaction between enaminone 1 and 1H-indene-1,2,3-trione (Ninhydrine) 2 leads to zwitterionic intermediate 4.
Recently, Monteiro" has developed a method that in some cases may bypass the need for conjugation--a chemical manipulation in which polysaccharides become T-cell dependent by making them zwitterionic.
Among his topics are basic thermodynamic relations for analyzing a fluid/fluid interface, the surface tension of pure water at air/water and oil/water interfaces, the surface tension of simple salt solutions, adsorption from mixed electrolyte solutions, and aqueous solutions of zwitterionic amino acids.
1) is a natural zwitterionic, low molecular weight, strong water binding organic molecule, which was first isolated from Ectothiorhodospira halochloris.
These included the synthesis of various polyurethane ionomers which contain cationic, anionic or zwitterionic functionality, polyisobutylene based polyurethanes and polydimethyl siloxane based polyurethanes.
The effect of different zwitterionic buffers and PBS used for out-of-incubator procedures during standard in vitro embryo production on development, morphology and gene expression of bovine embryos.