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).
Tests that evaluate liver function include several enzymes found in the heart, skeletal muscle and red blood cells in addition to the liver. The greatest concentration of alanine aminotransferase, sometimes called ALT or sometimes SGPT and aspartate aminotransferase, also called AST or SGOT occurs in the liver.