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Search results for “Chandra X-Ray Observatory”

1,000+ results for "Chandra X-Ray Observatory"

MSU study finds surprises about drug use

A new MSU study analyzed historical data from India to find reliable economic information on drug use. It shows that users switch between opium and cannabis when the price of one goes up, a phenomenon called substitution. This finding has significant policy implications for tackling addiction.

SourceMichigan State University·JournalDrug and Alcohol Dependence·DateNov 5, 2015

Exit dinosaurs, enter fishes

Scientists discover that mass extinction event triggered by asteroid strike led to the rise of ray-finned fishes as the ocean's most diverse and dominant vertebrates. The abundance of ray-finned fish teeth began to explode after the extinction event, becoming eight times more abundant in 24 million years.

SourceUniversity of California - San Diego·JournalProceedings of the National Academy of Sciences·DateJun 29, 2015

Scientists tune X-rays with tiny mirrors

Researchers at Argonne National Laboratory develop a new way of manipulating high-intensity X-rays using a small microelectromechanical system (MEMS) mirror. The device acts as an ultrafast mirror reflecting X-rays at precise times and specific angles, allowing for the selection of extremely brief but precise X-ray bursts.

SourceDOE/Argonne National Laboratory·JournalNature Communications·DateJun 11, 2015

X-ray ptychography, fluorescence microscopy combo sheds new light on trace elements

Scientists have developed a new approach combining ptychographic X-ray imaging and fluorescence microscopy to study the role of trace elements in biological functions. This technique demonstrates unparalleled sensitivity for measuring trace element distribution in thicker specimens at cryogenic temperatures.

SourceDOE/Argonne National Laboratory·JournalProceedings of the National Academy of Sciences·DateApr 13, 2015

Galactic 'rain' could be key to star formation

A team of astronomers has found that galactic 'rain' may be the key to understanding why some galaxies are more productive at creating stars than others. The researchers analyzed X-rays from over 200 galaxy clusters using NASA's Chandra X-ray Observatory and discovered that massive black holes can slow down gas that helps form stars.

SourceMichigan State University·JournalNature·DateMar 4, 2015