Which scientist discovered the elements Calcium, Barium and Potassium?
Calcium Antoine Lavoisier suspected that lime might be an oxide of a fundamental chemical element. In his table of the elements, Lavoisier listed five "salifiable earths" (i.e., ores that could be made to react with acids to produce salts ("salis" = salt, in Latin): "chaux" (calcium oxide), "magnésie" (magnesia, magnesium oxide), "baryte" (barium sulfate), "alumine" (alumina, aluminium oxide), and "silice" (silica, silicon dioxide). About these "elements", Lavoisier speculated: Calcium, along with its congeners magnesium, strontium, and barium, was first isolated by Humphry Davy in 1808. Following the work of Jöns Jakob Berzelius and Magnus Martin af Pontin on electrolysis, Davy isolated
Calcium-activated potassium channel Calcium-activated potassium channel Calcium-activated potassium channels are potassium channels gated by calcium, or that are structurally or phylogenetically related to calcium gated channels. They were first discovered in 1958 by Gardos who saw that Calcium levels inside of a cell could affect the permeability of potassium through that cell membrane. Then in 1970, Meech was the first to observe that intracellular calcium could trigger potassium currents. In humans they are divided into three subtypes large conductance or BK channels, which have very high conductance which range from 100 to 300 pS, intermediate conductance or IK channels, with intermediate conductance ranging