TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

Enzyme that catalyzes the conversion of urea to ammonia and carbon dioxide.  2, record 1, English, - urease

Record number: 1, Textual support number: 1 CONT

It was therefore a major landmark in the history of enzyme research when, in 1897, Eduard Buchner succeeded in extracting from yeast cells that enzymes catalyzing alcoholic fermentation. This achievement clearly demonstrated that these important enzymes, which catalyze a major energy-yielding metabolic pathway, can function independently of cell structure. However, it was not until many years later that an enzyme was first isolated in pure crystalline form. This was accomplished by J.B. Sumner in 1926 for the enzyme urease isolated from extracts of the jack bean. Sumner presented evidence that the crystals consist of protein, and he concluded, contrary to prevailing opinion, that enzymes are proteins.  3, record 1, English, - urease

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Enzyme catalysant l’hydrolyse de l’urée en carbonate d’ammonium. Elle est présente chez les végétaux ou chez les microorganismes responsables de la décomposition de l’urée dans les urines exposées à l’air. L’enzyme est utilisée pour le dosage spécifique de l’urée dans les milieux biologiques.  2, record 1, French, - ur%C3%A9ase

Record number: 1, Textual support number: 1 CONT

Un très grand nombre de dosages, en particulier en analyse médicale, requièrent l'utilisation d’enzymes. Ces enzymes solubles peuvent être remplacées avantageusement par des enzymes insolubilisées sur des supports papier ou Nylon. [...] Beaucoup plus original est le développement d’électrodes biologiques, dites «électrodes à enzymes». Il s’agit en fait d’électrodes mixtes. Ainsi, dans le cas d’une électrode à urée, l'uréase adsorbée sur un gel convertit l'urée en ions ammonium et HCO_3</sub>^-. Une électrode sensible aux ions NH₄⁺ permet la mesure directe de la quantité d’urée disponible(qui détermine en fait la vitesse de production d’ions NH₄⁺).  3, record 1, French, - ur%C3%A9ase

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

A natural sodium sesquicarbonate and the most important of the natural sodas.  4, record 2, English, - sodium%20sesquicarbonate

Record number: 2, Textual support number: 1 OBS

Chemical formula: Na₂CO₃•NaHCO₃•2H₂O or Na₂(CO₃)•Na₂(HCO₃)•2H₂O  4, record 2, English, - sodium%20sesquicarbonate

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Cristaux aciculaires incolores, d’aspect soyeux, inodores, (...). Chauffé à 100 ° dans un courant d’air sec exempt de CO2 perd son eau en donnant Na2CO3,NaHCO3 puis se transforme en carbonate neutre. (...) [Utilisation : ] poudres d’entretien et poudres à lessives, sels de toilette, lavage et essangeage des textiles, lavage des objets en aluminium et des bois peints, industrie photographique, cristallerie.  1, record 2, French, - sesquicarbonate%20de%20sodium

Record number: 2, Textual support number: 1 OBS

Formule chimique : Na₂CO₃•NaHCO₃•2H₂O ou Na₂(CO₃) •Na₂(HCO_3</sub>) •2H₂O  4, record 2, French, - sesquicarbonate%20de%20sodium

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

A nonhalogenated hydrocarbon derivative which appears under the form of a colorless liquid with an agreeable odour and which is used as a refrigerant, a cellulose acetate solvent, a fumigant and a larvicide.  8, record 3, English, - methyl%20formate

Record number: 3, Textual support number: 1 OBS

methyl formate: form recommended by the IUPAC (International Union of Pure and Applied Chemistry) for the systematic name corresponding to the CAS number indicated on the present record.  9, record 3, English, - methyl%20formate

Record number: 3, Textual support number: 2 OBS

Also known under the commercial designation UN 1243.  8, record 3, English, - methyl%20formate

Record number: 3, Textual support number: 3 OBS

Chemical formula: C₂H₄O₂ or HCOOCH₃ or HCO₂CH₃  8, record 3, English, - methyl%20formate

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 DEF

Dérivé d’hydrocarbure non halogéné se présentant sous la forme d’un liquide incolore, d’odeur agréable, soluble dans l’eau, l’alcool, l’éther, utilisé comme frigorigène, comme solvant de l’acétate de cellulose, comme insecticide et en synthèse organique.  6, record 3, French, - formiate%20de%20m%C3%A9thyle

Record number: 3, Textual support number: 1 OBS

formiate de méthyle : forme recommandée par l’UICPA (Union internationale de chimie pure et appliquée) pour le nom systématique correspondant au numéro CAS indiqué sur la présente fiche.  4, record 3, French, - formiate%20de%20m%C3%A9thyle

Record number: 3, Textual support number: 2 OBS

Formule chimique : C₂H₄O₂ ou HCOOCH₃ ou HCO_2</sub>CH₃  6, record 3, French, - formiate%20de%20m%C3%A9thyle

Record 3,  Textual support,  Spanish

Record number: 3, Textual support number: 1 OBS

Fórmula química: C₂H₄O₂ o HCOOCH₃ o HCO₂CH₃  3, record 3, Spanish, - formiato%20de%20metilo

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

... an evaporite mineral ... used as a source of sodium carbonate.  5, record 4, English, - trona

Record number: 4, Textual support number: 1 CONT

In nonmarine environments (lacustrine) evaporite deposits comprise large amounts of trona, borates, Na, Mg, Ca, halite, Na-sulphates ...  6, record 4, English, - trona

Record number: 4, Textual support number: 1 OBS

Chemical formula: Na₃(CO₃)(HCO₃)·2H₂O  7, record 4, English, - trona

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 DEF

Minéral (carbonate hydraté de sodium) du système cristallin monoclinique [que l’on] trouve notamment en Afrique du Nord.  3, record 4, French, - trona

Record number: 4, Textual support number: 1 CONT

Dans les milieux continentaux (lacustres), les dépôts évaporitiques contiennent d’importantes quantités de trona, de borates, de Na, de Mg, de Ca, de halite et de sulfates de Na [...]  4, record 4, French, - trona

Record number: 4, Textual support number: 1 OBS

Une des principales sources de carbonate de sodium (Na₂CO₃) et de soude caustique (NaCH) en Amérique du Nord est le raffinage du trona d’origine naturelle.  5, record 4, French, - trona

Record number: 4, Textual support number: 2 OBS

Formule chimique : Na₃(CO₃)(HCO_3</sub>) ·2H₂O  6, record 4, French, - trona

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 CONT

A decade of results in Scandinavia indicate that as lakes are subjected to acidic precipitation, cations are mobilized, and that some of the bicarbonate ions are replaced by sulphate, thus, the normal relationship between the dominant cations, calcium and magnesium, and alkalinity, appears to be altered.  1, record 5, English, - bicarbonate%20ion

Record number: 5, Textual support number: 2 CONT

Carbonic acid, being a weak acid, dissociates only slightly in distilled water, yielding hydrogen ions and bicarbonate ions ...  2, record 5, English, - bicarbonate%20ion

Record number: 5, Textual support number: 1 OBS

Chemical formula: HCO₃-  3, record 5, English, - bicarbonate%20ion

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 OBS

Formule chimique :HCO_3</sub>-  3, record 5, French, - ion%20bicarbonate

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 DEF

Colorless crystals or white powder with an odor of ammonia [used as] antiflatulent, expectorant and baking powder.  5, record 6, English, - ammonium%20hydrogencarbonate

Record number: 6, Textual support number: 1 OBS

ammonium hydrogencarbonate: form recommended by the IUPAC (International Union of Pure and Applied Chemistry).  1, record 6, English, - ammonium%20hydrogencarbonate

Record number: 6, Textual support number: 2 OBS

Chemical formula: NH₄HCO₃ or CH₅NO₃  6, record 6, English, - ammonium%20hydrogencarbonate

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 DEF

Alcali utilisé comme levure chimique, [...] comme expectorant et comme antiflatulent.  4, record 6, French, - hydrog%C3%A9nocarbonate%20d%26rsquo%3Bammonium

Record number: 6, Textual support number: 1 OBS

Le carbonate d’ammonium commercial, qui en réalité n’est qu’un mélange de carbonate acide, (NH4)HCO3 et de carbamate [...] est utilisé en biscuiterie [...]  5, record 6, French, - hydrog%C3%A9nocarbonate%20d%26rsquo%3Bammonium

Record number: 6, Textual support number: 2 OBS

hydrogénocarbonate d’ammonium : forme recommandée par l’UICPA (Union internationale de chimie pure et appliquée).  6, record 6, French, - hydrog%C3%A9nocarbonate%20d%26rsquo%3Bammonium

Record number: 6, Textual support number: 3 OBS

Formule chimique : NH_4sub>HCO3 ou CH5NO3  7, record 6, French, - hydrog%C3%A9nocarbonate%20d%26rsquo%3Bammonium</sub>

Record 6,  Textual support,  Spanish

Record number: 6, Textual support number: 1 OBS

Fórmula química: NH₄HCO₃ o CH₅NO₃  2, record 6, Spanish, - bicarbonato%20de%20amonio

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 CONT

... Calcium and Magnesium react with other chemicals in the water. The warm water acts as a catalyst and increases the number of reactions depending on the concentration of calcium and magnesium. The reaction which takes place is the dissociation of calcium hydrocarbonate, formula: Ca(HC0₃) and magnesium hydrocarbonate, formula: Mg(HC0[susbcript 3])₂. Both of these are soluble solids, which means they can dissolve when put in water. When these two soluble salts dissociate, they form carbon dioxide (a gas), which is released from the water, and calcium and magnesium carbonate. These two compounds are not soluble and are therefore taken out of solution. And it is these substances that cause the filmy, fuzzy crud on the glass of your aquarium when the water evaporates.  3, record 7, English, - magnesium%20bis%28hydrogencarbonate%29

Record number: 7, Textual support number: 2 CONT

San Marcos River Basin. The lithology and the water flow conditions are the major factors that determine the chemical composition of the waters and the hydrogeochemical patterns. We can distinguish the following water types: sodium calcium hydrocarbonate for waters from the sedimentary-effusive rocks, magnesium hydrocarbonate for the waters which originate in the ultrabasic massif, and calcium hydrocarbonate for that waters which flow in the karst areas (at the source, caves, exsurgences and springs from the saturation zone).  4, record 7, English, - magnesium%20bis%28hydrogencarbonate%29

Record number: 7, Textual support number: 1 OBS

magnesium hydrocarbonate: traditional name, to be avoided.  1, record 7, English, - magnesium%20bis%28hydrogencarbonate%29

Record number: 7, Textual support number: 2 OBS

Chemical formula: Mg(HCO₃)₂  5, record 7, English, - magnesium%20bis%28hydrogencarbonate%29

Record 7,  Textual support,  French

Record number: 7, Textual support number: 1 CONT

(Matériel pour le grimpeur) sac à pof : petit sac dans lequel le grimpeur met du pof (poudre de résine ) ou de la magnésie (hydrocarbonate de magnésium) afin d’absorber la transpiration des mains et d’éviter que celle-ci le fasse glisser.  4, record 7, French, - bis%28hydrog%C3%A9nocarbonate%29%20de%20magn%C3%A9sium

Record number: 7, Textual support number: 1 OBS

hydrocarbonate de magnésium : nom traditionnel, à éviter.  1, record 7, French, - bis%28hydrog%C3%A9nocarbonate%29%20de%20magn%C3%A9sium

Record number: 7, Textual support number: 2 OBS

Formule chimique : Mg(HCO_3</sub>) ₂  5, record 7, French, - bis%28hydrog%C3%A9nocarbonate%29%20de%20magn%C3%A9sium

Record 7,  Textual support,  Spanish

Record 8,  Textual support,  English

Record number: 8, Textual support number: 1 CONT

On an equivalent basis the dominant anion in both bulk and wet precipitation was SO₄^-, with H⁺ the dominant cation.  6, record 8, English, - dominant%20anion

Record number: 8, Textual support number: 2 CONT

Cl^- is the dominating anion and it also dominates the seasonal variation of anions in the runoff from Breidvikdalen.  7, record 8, English, - dominant%20anion

Record 8,  Textual support,  French

Record number: 8, Textual support number: 1 DEF

Ion négatif jouant un rôle dominant dans l’équilibre chimique naturel d’un milieu.  4, record 8, French, - anion%20majeur

Record number: 8, Textual support number: 1 CONT

Anions majeurs : les bicarbonates HCO_3</sub>^- et les sulfates SO₄^-2 prédominent nettement par rapport aux nitrates NO₃^- et aux chlorures Cl^-.  5, record 8, French, - anion%20majeur

Record 8,  Textual support,  Spanish

Record number: 8, Textual support number: 1 DEF

Ión negativo que rige el equilibrio natural en un medio ambiente determinado. Son casi siempre sulfatos o bicarbonatos.  1, record 8, Spanish, - ani%C3%B3n%20dominante

Record 9,  Textual support,  English

Record number: 9, Textual support number: 1 DEF

The formic acid radical, HCO·, ... characteristic of aldehydes.  5, record 9, English, - formyl

Record number: 9, Textual support number: 1 OBS

hydridooxidocarbon(·); HCO· radical: The dot must be centered and pronounced after the name: "hydridooxidocarbon dot"; "HCO dot radical."  1, record 9, English, - formyl

Record 9,  Textual support,  French

Record number: 9, Textual support number: 1 DEF

Radical libre oxygéné à un carbone.  4, record 9, French, - formyle

Record number: 9, Textual support number: 1 OBS

hydrurooxidocarbone(·) ;radical HCO· : Le point est un point centré; pour les noms des radicaux comportant un point centré, il faut prononcer «dot» en anglais et «point» en français après le nom :«hydrurooxidocarbone point»; «radical HCO point».  1, record 9, French, - formyle

Record 9,  Textual support,  Spanish

Record 10,  Textual support,  French

Record 10,  Textual support,  Spanish

Record 11,  Textual support,  English

Record number: 11, Textual support number: 1 OBS

Hearing CarryOver TTY users can listen to the other party and use the TTY to type their message.  2, record 11, English, - Hearing%20CarryOver

Record 11,  Textual support,  French

Record 11,  Textual support,  Spanish