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).
Aspartate aminotransferase (AST) blood test. The aspartate aminotransferase (AST) blood test measures the level of the enzyme AST in the blood. A blood sample is needed. No special preparation is needed. When the needle is inserted to draw blood, some people feel moderate pain.