In a direct Coombs' test a special antibody is added to a sample of blood. This test checks whether there are antibodies already bound to the surface of the red blood cell. If the test is positive the antibodies that are added bind to the antibodies on the surface of the cell.
The River Hull is a navigable river in the East Riding of Yorkshire in the north of England. It rises from a series of springs to the west of Driffield, and enters the Humber estuary at Kingston upon Hull.
Hull is located at 42Â°17â²10â³N 70Â°52â²35â³W / 42.28611Â°N 70.87639Â°W / 42.28611; -70.87639 (42.286347, -70.87663). According to the United States Census Bureau, the town has a total area of 26.9 square miles (69.6 km2), of which 2.8 square miles (7.3 km2) is land and 24.1 square miles (62.3 km2), or 89.58%, is water.