Ion thrusters emit a beam of positively charged xenon ions. Lipid bilayers are generally impermeable to ions and polar molecules. Oxidation of ions or neutral molecules occurs at the anode. The gas is ionized in the magnetosphere producing sulfur and oxygen ions. Biochemical signals are biochemical molecules such as proteins, lipids, ions, and gases. Saliva is made of chemicals, such as organic molecules, inorganic ions and macromolecules. Potassium iodide is an ionic compound which is made of the following ions&colon; KI. The formation of uncharged atoms from ions is called discharging. Examples are electrons, ions and holes. The fluorine compounds decompose into products including fluoride ions. Chelation is a type of bonding of ions and molecules to metal ions. The anion gap is affected by changes in unmeasured ions. Redox affects the solubility of nutrients, especially metal ions. The term is equal to the concentration of hydroxide ions. It works by decreasing the amount of hydrogen ions and bicarbonate in the body.