Due to construction and functional characteristics above described, with the internal reflux column it is possible to get selective the separation of components of extremely complex mixtures, with similar chemico-physical characteristics, not economically separable otherwise.
Uniform numbers in American football are unusual compared to those in other sports. They are displayed in more locations on the uniform; they are universally worn on both the front and back of the jersey; and in many cases TV numbers are displayed on either the jersey sleeves, the shoulder pad, or occasionally on the helmets.
The official rules state that: 1  All players on a team must wear identical uniforms during a single game. 2  Numbers: All players must wear their uniform numbers on the back of the uniform. 3  Undershirt: If the undershirt is exposed then all the players on the team must wear matching ones.