The measurement quoted in dB describes the ratio (10 log power difference, 20 log voltage difference, etc.) between the quantity of two levels, the level being measured and a reference.
Alt Codes for Bracketing ; Alt Code Symbol Description Alt 40 ( Open Bracket Alt 41 ) Close Bracked Alt Codes for Degree of Accuracy ; Alt Code Symbol Description Alt 241 Â± Plus or Minus Alt Codes for Fractions ; Alt Code Symbol Description Alt 47 / Fraction seperator
Alanine Aminotransferase (ALT). Guide. An alanine aminotransferase (ALT) test measures the amount of this enzyme in the blood. ALT is found mainly in the liver, but also in smaller amounts in the kidneys, heart, muscles, and pancreas. ALT was formerly called serum glutamic pyruvic transaminase (SGPT).he alanine aminotransferase (ALT) test is done to: 1  Identify liver disease, especially cirrhosis and hepatitis caused by alcohol, drugs, or viruses. 2  Help check for liver damage. 3  Find out whether jaundice was caused by a blood disorder or liver disease. 4  Keep track of the effects of medicines that can damage the liver.