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).
An aspartate aminotransferase (AST) test is often part of an initial screening for liver disease. The liver plays a variety of important roles in the body: It stores fuel from food, makes proteins, and helps remove toxins from the body. The liver also makes bile, a fluid that helps in digestion.