Related topics: protein

The pH of calcium ions controls ion channel opening

Ion channels are pores in the membrane of cells or cell organelles. They allow positively or negatively charged particles, so-called ions, to be transported across the membrane. Biochemists at Johannes Gutenberg University ...

How ion adsorption affects biological membranes' functions

In a new study published in EPJ E, Izabela Dobrzy?ska from the University of Bia?ystok, Poland, develops a mathematical model describing the electrical properties of biological membranes when ions such as calcium, barium ...

Structure of electrolyte controls battery performance

The research team at the Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology has reported that adding water into an electrolyte improves the function of vanadium oxide, a positive ...

Coping with errors in the quantum age

Quantum systems can be manipulated with extremely high precision, but not perfectly. Researchers in the Department of Physics at ETH Zurich have now demonstrated how to monitor and correct errors that occur during such operations.

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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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