amphoteric


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amphoteric

[¦am·fə¦ter·ik]
(chemistry)
Having both acidic and basic characteristics. Also known as amphiprotic.
References in periodicals archive ?
It contains abrasive cleaning particles comprised of a biodegradable thermoplastic material selected from the group consisting of biodegradable petroleum-based polyesters, thermoplastic starch, cellulose esters, and mixtures thereof (said biodegradable petroleum-based polyesters selected from the group consisting of polyesteramide, aliphatic copolyesters, aromatic copolyesters, and mixtures thereof); one or more surfactants selected from the group consisting of anionic, nonionic, cationic, amphoteric and mixtures thereof; and a first acidic component that consists of one or more chelating acids.
Taking into account all of the factors mentioned above, the amphoteric copolymer poly (acrylamide-acryloyloxyethyl trimethyl ammonium chloride--2-acrylamido-2-methyl-propane sulfonate) (PADA) has been synthesized in aqueous solution by ternary free radical copolymerization.
The firm has also received a notice of allowance of Canada Patent 2,665,783, which includes processes for making a broad range of amphoteric liposomes, including the SMARTICLES formulation currently in Phase I and Phase II clinical studies.
The amphoteric surfactants are best used for corrosion inhibition and are used in enhanced oil recovery technology such as steam flooding.
These include amphoteric compounds (chiefly, cocamidopropyl betaine, plus others in the betaine family, and related compounds), nonionic compounds (such as cocamide diethanolamine, also called cocamide DEA), and hydrophobically modified (HM) polymers.
Newer Surfactants * Amphoteric surfactants (eg, cocamidopropyl betaine) * Nonionic surfactants (eg, cocamide diethanolamine) * Hydrophobically modified polymers
In many cases, acidic, basic and amphoteric compounds don't elute or are eluted with very poor peak shapes, even with binary solvent mixtures of carbon dioxide and methanol or ethanol.
Surfactants (surface-active agents) can be anionic, amphoteric, polymeric and non-ionic.
Amphoteric in B, a systemic antifungal medication, is not commonly used, and health care practitioners may be unfamiliar with its various formulations and the potential consequences of mix-ups among them.
Rhodia is a world leader in the production of mild amphoteric surfactants, phosphorus chemistry and guars and derivatives, as well as in high-performance silicas, rare earth-based formulations and diphenols.
The design and synthesis of brushlike amphoteric polymer poly-[isobutylene-alt-(maleic acid)-graft-pentaethylenehex-amine] by grafting various aligoethyleneamines onto a low-molecular-weight poly[isobutylene-alt-(maleic anhydride)] is presented in the work by Y.