If a team official, substitute, substituted or sent off player or outside agent enters the field of play the referee must: 1  only stop play if there is interference with play. 2  have the person removed when play stops. 3  take appropriate disciplinary action.
The bicarbonate ion (hydrogencarbonate ion) is an anion with the empirical formula H C O 3 â and a molecular mass of 61.01 daltons; it consists of one central carbon atom surrounded by three oxygen atoms in a trigonal planar arrangement, with a hydrogen atom attached to one of the oxygens.
1 Note that a new HCO3- ion is generated from the intracellular breakdown of H20 to OH-and H+ and subsequent reaction of OH-with CO2 to form HCO3- . 2  This new bicarbonate then crosses the basolateral membrane via a Na+ - 3HCO3- cotransporter.