The blood used in the agar is also treated beforehand to remove a molecule called fibrin, which participates in the clotting of blood. The absence of fibrin ensures that clotting of the blood does not occur in the agar, which could interfere with the visual detection of the hemolytic reactions.
Chebeague Island, Maine. Chebeague Island is an island town in Cumberland County, Maine, United States, located in Casco Bay, 10 miles (16 km) from Portland. These islands are sometimes referred to as an older, now archaic term The Calendar Islands because there was once a belief that the approximate number of islands was 365.
Lighthouse Reef as seen from space. The Great Blue Hole is near the center of the photograph. The Great Blue Hole is a giant submarine sinkhole off the coast of Belize. It lies near the center of Lighthouse Reef, a small atoll 70 km (43 mi) from the mainland and Belize City. The hole is circular in shape, over 300 m (984 ft) across and 108 m (354 ft) deep.