She founded the Oxygen media company, the Oprah's Angel Network charity and the Harpo film,television and radio production company.

VOA: special.2010.04.16

Blood clots can kill if they move to the heart and lungs and stop needed oxygen from reaching those important organs.

VOA: special.2009.07.14

At the time, scientists believed that a person at the top of the mountain would only have enough oxygen to sleep.

VOA: special.2010.06.30

The atmosphere is about twenty-percent oxygen and eighty percent nitrogen from Earth's surface to where space begins at one-hundred-twenty kilometers up.

VOA: special.2011.04.06

Doctors say that over time the damage interferes with the natural exchange of oxygen and carbon dioxide in the lungs.

VOA: special.2010.06.23

Far below sea level, they contain some of the harshest environments on Earth, with no oxygen and no light.

VOA: special.2010.11.10

News reports said Adair used about three hundred forty kilograms of nitroglycerine explosive material to pull the oxygen out of the fire.

VOA: special.2009.03.22

CPR,or cardiopulmonary resuscitation, can save a life and reduce the risk of brain damage from loss of oxygen.

VOA: special.2009.06.09

But a drop in oxygen levels can cause a health emergency in people with heart or lung problems.

VOA: special.2009.07.14

They make proteins including oxygen-carrying blood substances, antibodies to protect against disease, and substances that break down sugar.

VOA: special.2009.12.08

This makes it more difficult for the body to effectively use the same amount of oxygen as it would on the ground.

VOA: special.2009.07.14

The deformed cells block blood vessels and cut off the flow of oxygen to tissue in the body.

VOA: special.2009.12.16

The result is a five to twenty percent drop in the amount of oxygen in the blood.

VOA: special.2009.07.14

It contains forms of hydrogen and oxygen that can mark, or label, these elements within body water.

VOA: special.2011.07.27