Over the years,researchers have identified several substances in the blood that can serve as what they call cardiac biomarkers.

VOA: special.2009.07.15

The experts said some plant chemicals are high in antioxidants -- substances that remove harmful chemicals from the body.

VOA: special.2009.05.19

He says the substances are especially dangerous because they travel through the air and stay in the atmosphere, soil and water.

VOA: special.2009.06.23

The chemicals are joining twelve other substances that are already banned under a treaty known as the Stockholm Convention.

VOA: special.2009.06.23

Sweet potatoes, carrots and other darkly colored fruits and vegetables contain substances that the body can change into vitamin A.

VOA: special.2009.04.21

Some of the most important helpers in the job of good health are the substances we call vitamins.

VOA: special.2009.04.21

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

VOA: special.2009.12.08

The tests showed that many of the substances contained high levels of antioxidant chemicals known as polyphenols.

VOA: special.2009.05.19

For example, he believes it may be possible to examine substances within a mummy, like embalming liquid.

VOA: special.2010.06.29

Since then, scientists around the world have been working to identify substances gathered from Comet Wild-Two.

VOA: special.2009.09.30

They said spices contain substances that kill or slow the growth of dangerous bacteria in food.

VOA: special.2009.05.19

Mister Cooper says the substances build up in the cells of plants, animals and human beings.

VOA: special.2009.06.23

Iron is a micronutrient. Micronutrients are important substances that are found in small amounts in foods.

VOA: special.2011.01.05

The chip removed ninety-nine percent of the salt and other harmful substances from water samples.

VOA: special.2010.04.05

Sir John Vane found that aspirin blocks the body from making natural substances called prostaglandins.

VOA: special.2009.10.20

To prevent this from happening, levodopa can be combined with other substances, like carbidopa.

VOA: special.2009.04.07

A filter is designed to reject some substances, while permitting others to pass through.

VOA: special.2010.01.05

His team found that locusts and cockroaches carry substances that may help kill microbes.

VOA: special.2010.12.07

Allergies are abnormal reactions of the immune system in response to otherwise harmless substances.

VOA: special.2009.07.28

Scientists strongly believe that finding such substances will be goals of future space flights.

VOA: special.2010.05.25

By the nineteen-twenties, sports organizations were attempting to stop the use of doping substances.

VOA: special.2011.04.12

We learn where scientists found one of the basic substances necessary for life.

VOA: special.2009.09.30

These substances can damage the human nervous system and natural defenses against disease.

VOA: special.2009.06.23

Much of our good health depends on the cooperation between substances.

VOA: special.2009.04.21

And they contain substances that are believed to fight cancer.

VOA: special.2010.03.09