Bodies not in contact in a vacuum have only the radiation mechanism for heat energy transfer. An obvious example is the Earth in space, receiving heat radiation from the Sun which is partly absorbed and partly reflected, and emitting heat radiation to space.
Aspartate Aminotransferase (AST). Guide. An aspartate aminotransferase (AST) test measures the amount of this enzyme in the blood. AST is normally found in red blood cells, liver, heart, muscle tissue, pancreas, and kidneys. AST formerly was called serum glutamic oxaloacetic transaminase (SGOT).
Two enzymes often measured on routine tests are known as ALT (alanine transaminase) and AST (aspartate transaminase). ALT is found in the liver, heart, muscles and kidneys. AST is in the liver, heart, muscles, kidneys, brain, pancreas, spleen and lungs. ALT is also known as SGPT (serum glutamic-pyruvic transaminase), and AST is also called SGOT (serum glutamic-oxaloacetic transaminase).