alkaline earth


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alkaline earth

[¦al·kə‚līn ′ərth]
(inorganic chemistry)
An oxide of an element of group 2 in the periodic table, such as barium, calcium, and strontium. Also known as alkaline-earth oxide.
References in periodicals archive ?
The aims of this study is twofold: (a) the enhancement of NO2(ads) stability upon pair-wise adsorption for alkaline earth oxide clusters is addressed [12,13] taking (MgO)9 and (CaO)9 as representatives.
The contents of alkaline earth magnesium slightly exceed calcium contents.
But he argues that placing helium with the alkaline earth metals results in a more regularly shaped structure that can take two forms.
The strontium and the calcium ions, members of the alkaline earth series (Group IIB of the Periodic Table), have many properties in common, both having a valency of 2+, similar ionic radii, and the ability to form complexes and chelates of various solubilities and various binding strengths.
c] cuprate family shares a common crystal structure of a large perovskite chemical cell containing multiple copper-oxygen planes interwoven with alkaline earth or rare earth oxide layers.
2) the buffered sample is loaded onto the column; the transition metals are retained; the alkali and alkaline earth metals are partially retained; and the anions are not retained at all;
Magnesium (Mg) is a non-metallic abundant alkaline earth metal that represents an important material for todays modern lifestyle- smartphones, automobiles, aircrafts, and other everyday essentials all require magnesium.
Key statement: A method for producing a modified conjugated diene polymer comprising a polymerization step of obtaining a conjugated diene polymer containing a nitrogen atom in a polymer chain and an active end by copolymerizing a conjugated diene compound and a nitrogen atom-containing vinyl compound, or a conjugated diene compound, an aromatic vinyl compound and a nitrogen atom-containing vinyl compound by use of an alkali metal compound and/or an alkaline earth metal compound as a polymerization initiator, and a modification step of reacting a modifier.
The topics include experimentation and mathematical model research on air gap membrane distillation, synthesizing and characterizing a novel alkaline earth metal complex, the microstructure and corrosion resistance of black micro-arc oxidation ceramic coatings on magnesium alloy, the influence of a model's shape on molding time in a glass molding press, the effect of polyester structures on the damping property of polyurethane elastomers, using lime-mediated sewage sludge as metallurgy sintering ingredients, and changes of fibrinolytic activity of nattokinase in artificial gastrointestinal environment and human digestive juice.
0% by weight of a compound of the formula R1 (Mn04)n, or mixtures thereof, wherein R1 is H, an alkali-metal, or an alkaline earth metal, and n is 1 when R1 is H or an alkali-metal and 2 when R1 is an alkaline earth metal; and a reducing agent comprising between about 1-3% by weight of a peroxygen compound, or mixtures thereof, wherein the peroxygen compound is hydrogen peroxide, urea peroxide, an alkali-metal peroxide or an alkaline earth metal peroxide.
ABSTRACT: The purpose of study was to assess concentration of some selected heavy metals along with selected alkali and alkaline earth metals in the sample of Jabal-al-Noor Makkah.