Category Archives: Science

Loss of Appetite Deciphered in Brain Cell Circuit

The meal is pushed way, untouched. Loss of appetite can be a fleeting queasiness or continue to the point of emaciation. While it’s felt in the gut, more is going on inside the head.

New findings are emerging about brain and body messaging pathways that lead to loss of appetite, and the systems in place to avoid starvation. (more…)

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Researchers ‘Print’ Polymers That Bend Into 3-D Shapes

Technique could be used to direct growth of blood vessels or tissues in the laboratory

Christian Santangelo, Ryan Hayward and colleagues at the University of Massachusetts Amherst recently employed photographic techniques and polymer science to develop a new technique for printing two-dimensional sheets of polymers that can fold into three-dimensional shapes when water is added. The technique may lead to wide ranging practical applications from medicine to robotics (more…)

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Insulin, Nutrition Prevent Blood Stem Cell Differentiation in The Fruit Fly

UCLA stem cell researchers have shown that insulin and nutrition prevent blood stem cells from differentiating into mature blood cells in Drosophila, the common fruit fly, a finding that has implications for studying inflammatory response and blood development in response to dietary changes in humans.

Keeping blood stem cells, or progenitor cells, from differentiating into blood cells is important as blood stem cells are needed to create the blood supply for the adult fruit fly. (more…)

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Statue, Chapels and Animal Mummies Found in Egypt by U of T Team

Rare wood statue may be female pharaoh

A wooden statue of a king, a private offering chapel, a monumental building and remains of over 80 animal mummies found by a University of Toronto-led team in Abydos, Egypt reveal intriguing information about ritual activity associated with the great gods. (more…)

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Touch of Gold Improves Nanoparticle Fuel-Cell Reactions

Chemists at Brown University have created a triple-headed metallic nanoparticle that reportedly performs better and lasts longer than any other nanoparticle catalyst studied in fuel-cell reactions. The key is the addition of gold: It yields a more uniform crystal structure while removing carbon monoxide from the reaction. Results published in the Journal of the American Chemical Society.

PROVIDENCE, R.I. [Brown University] — Advances in fuel-cell technology have been stymied by the inadequacy of metals studied as catalysts. The drawback to platinum, other than cost, is that it absorbs carbon monoxide in reactions involving fuel cells powered by organic materials like formic acid. A more recently tested metal, palladium, breaks down over time. (more…)

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First Habitable-Zone super-Earth Discovered in Orbit Around a Sun-like Star

Washington, D.C. — NASA’s Kepler Mission has discovered the first super-Earth orbiting in the habitable zone of a star similar to the Sun. A team of researchers, including Carnegie’s Alan Boss, has discovered what could be a large, rocky planet with a surface temperature of about 72 degrees Fahrenheit, comparable to a comfortable spring day on Earth. This landmark finding will be published in The Astrophysical Journal.

The discovery team, led by William Borucki of the NASA Ames Research Center, used photometric data from the NASA Kepler space telescope, which monitors the brightness of 155,000 stars. Earth-size planets whose orbital planes are aligned such that they periodically pass in front of their stars result in tiny dimmings of their host star’s light–dimmings that can only be measured by a highly specialized space telescope like Kepler. (more…)

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