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.
Home Â» Biology Â» Oxygen. carrying molecule of red blood cells; it is made up of four polypeptide chains (2 alpha type and 2 beta type) and non-protein molecule s called porphyrins.Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition.ome Â» Biology Â» Oxygen. carrying molecule of red blood cells; it is made up of four polypeptide chains (2 alpha type and 2 beta type) and non-protein molecule s called porphyrins. Source: Jenkins, John B. 1990.