The hemoglobin is checked before each donation to. ensure that the donor has adequate red blood cell levels to donate blood. Blood donors must have a minimum of 12.5 g/dL hemoglobin or a hematocrit of 38% to be accepted for donation. The hematocrit is a measure of the volume that red blood cells take up in the blood. Most men have a hemoglobin of 12.5 g/dL or greater and a hematocrit above 38 percent, but many women naturally have lower hemoglobin/hematocrit levels.
Iwo Jima, which means Sulfur Island, was strategically important as an air base for fighter escorts supporting long-range bombing missions against mainland Japan.ecause of the distance between mainland Japan and U.S. bases in the Mariana Islands, the capture of Iwo Jima was necessary to provide an emergency landing strip for crippled B-29s returning from bombing runs.
History Detectives attends the 65th Anniversary Battle of Iwo Jima Reunion and talks to the very men who fought in the battle. Then, military historians help us understand the role documents like this map could have played in key battles of World War II.ne particular war souvenir has always captivated a California woman: a map her father brought home from the battle of Iwo Jima. Her father says he found the map inside the jacket of a dead Japanese soldier.