anion


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Related to anion: anion exchange, anion gap

anion

(ăn`ī'ən), atom or group of atoms carrying a negative charge. The charge results because there are more electrons than protons in the anion. Anions can be formed from nonmetals by reduction (see oxidation and reductionoxidation and reduction,
complementary chemical reactions characterized by the loss or gain, respectively, of one or more electrons by an atom or molecule. Originally the term oxidation
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) or from neutral acids (see acids and basesacids and bases,
two related classes of chemicals; the members of each class have a number of common properties when dissolved in a solvent, usually water. Properties
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) or polar compounds by ionization. Anionic species include Cl, SO4−−, and CH3COO. Highly colored intermediates in organic reactions are often radical anions (anions containing an unpaired electron). Saltssalt,
chemical compound (other than water) formed by a chemical reaction between an acid and a base (see acids and bases). Characteristics and Classification of Salts

The most familiar salt is sodium chloride, the principal component of common table salt.
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 are made up of anions and cationscation
, atom or group of atoms carrying a positive charge. The charge results because there are more protons than electrons in the cation. Cations can be formed from a metal by oxidation (see oxidation and reduction), from a neutral base (see acids and bases) by protonation, or
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. See ionion,
atom or group of atoms having a net electric charge. Positive and Negative Electric Charges

A neutral atom or group of atoms becomes an ion by gaining or losing one or more electrons or protons.
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.

anion

[′a‚nī·ən]
(chemistry)
An ion that is negatively charged.

anion

a negatively charged ion; an ion that is attracted to the anode during electrolysis
References in periodicals archive ?
f]) [cone is the double layer anion concentration and is constant for a given case as diffusion inside the polymer matrix is order of magnitude slower than the other steps [8]].
The renal plasma flow (RPF) was calculated as a clearance of PAH, an organic anion prototype and RBF was estimated from RPF/1-Hematocrit (Agarwal, 2002; Gehrig et al.
In DKA, the high anion gap is attributed largely to excessive production of blood ketone bodies, and serum [beta]-hydroxybutyrate quantification is recommended for the diagnosis and monitoring of DKA (2).
Early diagnosis with early initiation of ethanol treatment is the modality of choice in units where haemodialysis is unavailable, and must be borne in mind in the patient with visual disturbance and high anion gap metabolic acidosis.
When a patient presents with signs of alcohol intoxication without the typical ethanol smell and a wide anion gap metabolic acidosis, ingestion of a toxic alcohol should be suspected and treatment instituted.
Therefore, the objective of the current study was to evaluate the effect of Anion with more than 70% of silicon dioxide (organic origin) on growth performance, nutrient digestibility, meat quality and fecal noxious gas content in growing-finishing pigs.
There are four classic causes of high anion gap acidosis: poisoning, renal failure, lactic acidosis and keto-acidosis.
Anion binding process which involves non-covalent interactions, namely electrostatic and hydrogen bonding interactions between a receptor and a negatively charged species, constitute a major challenge as compared to the cation binding.
Small ions adapt to this situation by passive diffusion aiming at a balanced situation in which products of paired ions' concentrations (one anion and one cation) are equal on both membrane sides, under the condition that further water movement is prevented by the fixed volume of neighboring fluid departments.
Changes in pH may be important where the anion is excreted in large quantities in association with protons, but in general the plant's inorganic cation-anion balance has a much larger effect on rhizosphere pH.
Hexavalent chromium removal using anion exchange and reduction with coagulation and filtration.
Two cases of reversed anion gap metabolic acidosis are presented and the potential causes discussed.