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This work is free software; you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation; either version 3 of the License, or any later version. This work is distributed in the hope that it will be useful, but without any warranty; without even the implied ...
CA2, CA-2 or CA II may refer to : Carbonic anhydrase II, a human gene; United States Court of Appeals for the Second Circuit; California's 2nd congressional district; Hummel CA-2, an ultralight aircraft; California State Route 2; Ca II, a singly-ionized calcium that produces the H and K lines, and the calcium triplet lines in the spectrum of ...
The adjacent table shows the result for [Ca 2+] and [H +] (in the form of pH) as a function of ambient partial pressure of CO 2 (K sp = 4.47 × 10 −9 has been taken for the calculation). At atmospheric levels of ambient CO 2 the table indicates that the solution will be slightly alkaline with a maximum CaCO 3 solubility of 47 mg/L.
The simplest example given by Thimbleby of a possible problem when using an immediate-execution calculator is 4 × (−5). As a written formula the value of this is −20 because the minus sign is intended to indicate a negative number, rather than a subtraction, and this is the way that it would be interpreted by a formula calculator.
The sodium-calcium exchanger (often denoted Na + /Ca 2+ exchanger, exchange protein, or NCX) is an antiporter membrane protein that removes calcium from cells. It uses the energy that is stored in the electrochemical gradient of sodium (Na +) by allowing Na + to flow down its gradient across the plasma membrane in exchange for the countertransport of calcium ions (Ca 2+).
The Ca 2+ concentration of the vacuole may reach millimolar levels. The most striking use of Ca 2+ ions as a structural element in algae occurs in the marine coccolithophores, which use Ca 2+ to form the calcium carbonate plates, with which they are covered. Calcium is needed to form the pectin in the middle lamella of newly formed cells.
Some forms of actinolite are used as gemstones. One is nephrite, one of the two types of jade (the other being jadeite, a variety of pyroxene). [5] Another gem variety is the chatoyant form known as cat's-eye actinolite. This stone is translucent to opaque, and green to yellowish green color. This variety has had the misnomer jade cat's-eye ...
Calcium batteries are one of many candidates to replace lithium-ion battery technology. It is a multivalent battery.Key advantages are lower cost, earth abundance (41,500 ppm), higher energy density, high capacity and high cell voltage, [12] and potentially higher power density.