(Elements & Compounds) a malleable silvery-white metallic element of the alkaline earth group; the fifth most abundant element in the earth's crust (3.6 per cent), occurring esp as forms of calcium carbonate. It is an essential constituent of bones and teeth and is used as a deoxidizer in...
PROBLEM TO BE SOLVED: To obtain a new diaza-18-crown-6 compound useful as chromoionophore for measuring calcium ion, especially as dry slide analysis element for calcium in clinical chemistry field. SOLUTION: This compound is represented by formula I [X is a group of formula II, formula ...
Calcium not only builds the structures that support our bodies, many of us also live in homes built using structural concrete or cement made with lime (calcium oxide). Snails and many shellfish use another calcium compound – calcium carbonate – to build their own homes too – their shells....
(Elements & Compounds) a malleable silvery-white metallic element of the alkaline earth group; the fifth most abundant element in the earth's crust (3.6 per cent), occurring esp as forms of calcium carbonate. It is an essential constituent of bones and teeth and is used as a deoxidizer in...
is the fifth most abundant element in Earth's crust, and the third most abundant metal, after iron and aluminium. The most common calcium compound on Earth is calcium carbonate, found in limestone and the fossilised remnants of early sea life; gypsum, anhydrite, fluorite, and apatite are ...
Calciumis found most abundantly in milk. 奶含钙最丰富. 《简明英汉词典》 To digcalciuminto the soil, he warned, does not help the plant. 他告诫说,翻土掺钙并不利于植物生长。 柯林斯例句 If you don't take milk, cheese or yoghurt, other sources ofcalciumare important. ...
Limestone, marble, and chalk are different forms of this compound. Slaked lime or calcium hydroxide is produced when limestone is heated at temperature above 825 �C, water being added carefully to it. It is used in a variety of chemical refinery processes. Mixing sand and lime produces ...
Hydroxyapatite is a naturally occurring mineral form of calcium apatite, a type of calcium phosphate compound. It is the principal mineral component of vertebrate bones and teeth and is also found in various other tissues in the human body. The chemical formula for hydroxyapatite is Ca₅(PO₄...
(Elements & Compounds) a malleable silvery-white metallic element of the alkaline earth group; the fifth most abundant element in the earth's crust (3.6 per cent), occurring esp as forms of calcium carbonate. It is an essential constituent of bones and teeth and is used as a deoxidizer in...
Calcium Oxide (CaO) is an inorganic compound. Calcium Oxide (CaO), also known as quicklime, is a white, odorless, and highly reactive solid at room temperature. It appears as a white or grayish powder or lumps, depending on the form in which it is handled. It is highly hygroscopic, me...