Calcium carbonate equilibrium pressure must exceed total atmospheric pressure of 101 kPa, which happens at 898 °C. Calcium carbonate is poorly soluble in pure water (47 mg/L at normal atmospheric CO partial pressure as shown below). The equilibrium of its solution is given by the equation (with dissolved calcium carbonate on the right): where the solubility product for [Ca] [CO] is given as anywhere from "K" = 3.7×10 to "K" = 8.7×10 at 25 °C, depending upon the data source. What the equation means is that the product of molar concentration of calcium ions (moles of dissolved Ca per liter of solution)
N-type calcium channel having a role in the transmission of nociceptive information in the body. A new drug, Ziconotide, is being tested to alter N-type channels in order to treat these conditions of chronic pain. One of the newest medicines is an analgesic drug that works through targeting N-type calcium channels specifically in order to lessen the transmission of pain. Peptide ɷɷ-conotoxins are what bind to the N-type calcium channels in order to block ion permeation, which then blocks the influx of calcium and the transmission of the nociceptive responses. Neurons located in the posterior horn of the spinal cord experience ɷɷ-conotoxins that,