Researchers say they observed shortages in the brain's reward system in patients with A.D.H.D.

VOA: special.2009.09.29

Sixty-five thousand H-1Bs are awarded each year to graduates with a bachelor's degree.

VOA: special.2009.07.02

Researchers studied the pathways on which dopamine travels in fifty-three adults with A.D.H.D.

VOA: special.2009.09.29

He says the finding might also help explain why people with A.D.H.D.

VOA: special.2009.09.29

Researchers compared the pathways that transmit dopamine in fifty-three adults with A.D.H.D.

VOA: special.2009.09.16

"There was a lower concentration of dopamine markers in the brain of individuals with A.D.H.D., specifically in the areas of the brain that are involved with reward and motivation."

VOA: special.2009.09.29

In South Africa, a campaign of text messages about H.I.V.

VOA: special.2010.05.03

Adults can also have it. People with A.D.H.D.

VOA: special.2010.05.26

Children with A.D.H.D. might have trouble paying attention.

VOA: special.2009.09.16

Children with A.D.H.D.

VOA: special.2009.09.29

The cancer scientists say this cancer often begins with an infection caused by a bacteria called Helicobactor Pylori, also known as H-Pylori.

VOA: standard.2010.05.12

Mark Hurd was out. Investigators said he had falsified expense records to hide spending on a woman who worked with H-P.

VOA: special.2010.08.13

Doctor Fukuda, an acting assistant director-general, said the W.H.O.has been working with the member states to prepare for a pandemic.

VOA: special.2009.06.10

Researchers say they have found a way to extend the storage life of a drug used to treat H.I.V.

VOA: special.2010.05.24