Related topics: protein · vitamin d

Tea time gets flavor boost from thin film, impure water

Getting your day started sometimes feels like it requires magic, but making a good cup of tea requires a little science. In Physics of Fluids, researchers from ETH Zurich describe how they applied the science of rheology ...

Alternative cement with low carbon footprint developed

Researchers at the Martin Luther University Halle-Wittenberg (MLU) in Germany and the Brazilian University of Pará have developed a climate-friendly alternative to conventional cement. Carbon dioxide (CO2) emissions can ...

Limestone improves coffee yield and profitability

The perfect cup of morning coffee. Before you even purchase the beans at the store, many things must go right before that great-tasting coffee can be poured into your favorite mug. It starts in the soil where farmers grow ...

ArtSea Ink: a colorful, seaweed-based ink for 3D printing

Some artists are embracing 3D printing as a new medium, allowing them to create intricate 3D compositions that are difficult to produce in any other way. But the rigid, plastic-based materials used in many 3D printers require ...

'Double decoration' enhances industrial catalyst

Adding lead and calcium to an industrial catalyst dramatically improves its ability to support propylene production at very high temperatures, making it stable and active for a month.

Digging into the molecules of fossilized dinosaur eggshells

Dinosaurs roamed the Earth more than 65 million years ago, and paleontologists and amateur fossil hunters are still unearthing traces of them today. The minerals in fossilized eggs and shell fragments provide snapshots into ...

Plant immune proteins trigger cell death

Plant cells self-destruct to survive. After detecting a pathogen, they set off a chain reaction that ultimately destroys them, preventing disease from spreading.

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Calcium

Calcium (pronounced /ˈkælsiəm/) is the chemical element with the symbol Ca and atomic number 20. It has an atomic mass of 40.078 amu. Calcium is a soft grey alkaline earth metal, and is the fifth most abundant element by mass in the Earth's crust. Calcium is also the fifth most abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate.

Calcium is essential for living organisms, particularly in cell physiology, where movement of the calcium ion Ca2+ into and out of the cytoplasm functions as a signal for many cellular processes. As a major material used in mineralization of bones and shells, calcium is the most abundant metal by mass in many animals.

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