An association football (soccer) match is presided over by a referee, whom the Laws of the Game give full authority to enforce the Laws of the Game in connection with the match to which he has been appointed (Law 5). The referee is oftentimes assisted by two assistant referees, and sometimes by a fourth official.
Barfoed's test. Barfoed's test is a chemical test used for detecting the presence of monosaccharides. It is based on the reduction of copper(II) acetate to copper(I) oxide (Cu2O), which forms a brick-red precipitate.
Purpose of the test. The sedimentation rate blood test measures how quickly red blood cells settle in a test tube. A sedimentation rate test is done to: - Find out if inflammation is present. - Check on the progress of a disease. - See how well a treatment is working.