Health

In secondhand vape, scientists smell risk

Available in an enticing array of flavors, electronic cigarettes have exploded in popularity since they hit the market about 15 years ago, particularly among middle and high school students. But research indicates that e-cigarettes—even ...

Gastroenterology

A simple diagnostic tool for gastrointestinal disorders

As food moves through the digestive tract, contracting muscles along the tract keep things flowing smoothly. Loss of this motility can lead to acid reflux, failure of food to move out of the stomach, or constipation.

Neuroscience

Studies compare best ways to treat wide-neck aneurysms

Aneurysms are weak, bulging portions of blood vessel walls. These blood-filled sacs resemble balloons in structure and have necks like balloons. Some aneurysms have larger necks and are called "wide-neck" aneurysms. These ...

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Metal

In chemistry, a metal (Greek: Metallo, Μέταλλο) is an element, compound, or alloy characterized by high electrical conductivity. In a metal, atoms readily lose electrons to form positive ions (cations); those ions are surrounded by delocalized electrons, which are responsible for the conductivity. The thus produced solid is held by electrostatic interactions between the ions and the electron cloud, which are called metallic bonds.

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