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MG NUMBER [5 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2015-11-03

English

Subject field(s)
  • Metrology and Units of Measure
  • Water Pollution
  • Environmental Studies and Analyses
DEF

A number used to indicate the intensity of colour of water, the standard unit being the colour produced by a solution containing 1 mg of platinum per litre [in the form of hydrogen hexachloroplatinate(IV), ] in the presence of 2 mg of cobalt(II) chloride hexahydrate per litre.

OBS

Hazen number: term and definition standardized by ISO.

French

Domaine(s)
  • Unités de mesure et métrologie
  • Pollution de l'eau
  • Études et analyses environnementales
DEF

Nombre utilisé pour indiquer la coloration de l'eau, l'unité étalon étant la couleur produite par une solution contenant 1 mg de platine par litre [sous la forme d'hydrogéno-hexachloroplatinate(IV),] en présence de 2 mg de chlorure de cobalt(II) hexahydraté par litre.

OBS

nombre Hazen : terme et définition normalisés par l'ISO.

Spanish

Campo(s) temático(s)
  • Metrología y unidades de medida
  • Contaminación del agua
  • Estudios y análisis del medio ambiente
DEF

Número utilizado para describir el color del agua, la unidad patrón es el color producido por 1 mg de platino por litro [en forma de hidrógeno-hexacloroplatinato(IV),] en presencia de 2 mg de cloruro de cobalto(II) hexahidrátado por litro.

Save record 1

Record 2 2011-01-19

English

Subject field(s)
  • Chemistry
  • Light Metals
Universal entry(ies)
Mg
symbol
7439-95-4
CAS number
OBS

A silvery-white metallic element in group II of the periodic table; malleable; ductile; and light. Only occurs in nature as compounds... Symbol, Mg; valence 2; hexagonal; atomic number, 12; atomic weight, 24. 312; specific gravity, 1. 74(at 5°C) ;melting point, 651°C; boiling point, 1, 107°C...

OBS

magnesium: term adopted by Environment Canada; used in the list of pollutants measured in the National Air Pollution Surveillance Network (NAPS).

OBS

Also known under the following designations: NA 1869; UN 1418; UN 1869; UN 2950.

PHR

Powdered magnesium.

PHR

Magnesium alloy, boring, clipping, granule, metal, pellet, ribbon, turning.

French

Domaine(s)
  • Chimie
  • Métaux légers
Entrée(s) universelle(s)
Mg
symbol
7439-95-4
CAS number
OBS

Métal blanc, le plus léger des métaux usuels utilisés en construction mécanique. (Élément chimique de symbole Mg.) [...] Numéro atomique : 12. Masse atomique : 24,305. Température de fusion : 648,8 °C. Température d'ébullition : 1 090 °C. Masse volumique : 1,74 g/cm³ [...]

OBS

magnésium : terme retenu par Environnement Canada; utilisé dans la liste des polluants mesurés par le Réseau national de surveillance de la pollution atmosphérique (RNSPA).

Spanish

Campo(s) temático(s)
  • Química
  • Metales ligeros
Entrada(s) universal(es)
Mg
symbol
7439-95-4
CAS number
OBS

Metal ligero, blanco, no.° atómico 12, que arde con llama muy brillante. Se empleaba para producir una iluminación muy viva para hacer fotografías instantáneas.

Save record 2

Record 3 2011-01-18

English

Subject field(s)
  • Geochemistry
DEF

The ratio of magnesium to iron, usually reported as the molar ratio Mg/(Mg+Fe).

OBS

Mg number : term used at Natural Resources Canada-Earth Sciences Sector.

French

Domaine(s)
  • Géochimie
OBS

valeur du rapport MgO/(MgO + 0 9 FeOt) : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Save record 3

Record 4 2010-02-23

English

Subject field(s)
  • Chemical Elements and Compounds
  • Geochemistry
  • Medication
Universal entry(ies)
Mg(HCO3)2
formula, see observation
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.

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).

OBS

magnesium hydrocarbonate: traditional name, to be avoided.

OBS

Chemical formula: Mg(HCO3)2

French

Domaine(s)
  • Éléments et composés chimiques
  • Géochimie
  • Médicaments
Entrée(s) universelle(s)
Mg(HCO3)2
formula, see observation
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.

OBS

hydrocarbonate de magnésium : nom traditionnel, à éviter.

OBS

Formule chimique : Mg(HCO3)2

Spanish

Save record 4

Record 5 2004-03-04

English

Subject field(s)
  • Analytical Chemistry
  • Petrochemistry
DEF

The number of milligrams of potassium hydroxide neutralized by the free acids present in one gram of oil, fat, or wax.

CONT

Our gels do not contain any free acids. Particularly no methacrylic acid. The acid number(mg KOH/g) is below 2.

OBS

The determination is made by titrating the sample in hot 95% ethyl alcohol, using phenolphthalein as indicator.

French

Domaine(s)
  • Chimie analytique
  • Chimie du pétrole
DEF

Nombre de milligrammes de potasse caustique nécessaires pour neutraliser l'acidité libre d'un gramme de matière grasse.

CONT

Indice de neutralisation (acidité et/ou basicité des huiles). L'indice d'acide, appelé encore «Acid Number (AN)» et anciennement «Total Acid Number (TAN)» est, par définition, le nombre de milligrammes de potasse nécessaire à la neutralisation des acides organiques ou minéraux contenus dans un gramme d'huile (mg KOH/g).

Spanish

Campo(s) temático(s)
  • Química analítica
  • Petroquímica
DEF

Miligramos de hidróxido potásico que son capaces de neutralizar los ácidos grasos libres que aparecen en un gramo de grasa.

Save record 5

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