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Latest Chalcogens Stories

Sulfur Aerosol Particles And Climate Change
2013-05-15 04:51:08

Brett Smith for redOrbit.com - Your Universe Online A new study on cloud formation shows that climate change models may have underestimated the cooling effect of sulfur aerosol particles in the atmosphere. These aerosols mitigate greenhouse gases by reflecting sunlight. They also act as seeds for cloud condensation by allowing humidity to accumulate around them — forming droplets and then clouds. To investigate the role of sulfur aerosols in cloud formation and climate change,...

Possibility Of A More Dynamic Biological Oxygen Cycle On The Early Earth Than Previously Thought
2013-04-25 10:22:56

University of California, Riverside A research team of biogeochemists at the University of California, Riverside has provided a new view on the relationship between the earliest accumulation of oxygen in the atmosphere, arguably the most important biological event in Earth history, and its relationship to the sulfur cycle. A general consensus exists that appreciable oxygen first accumulated in Earth's atmosphere around 2.4 to 2.3 billion years ago. Though this paradigm is built upon a...

Oceanic Volcanoes Reveal Signs Of Ancient Earthen Crust
2013-04-25 07:27:13

April Flowers for redOrbit.com - Your Universe Online For a long time now, scientists have been convinced that lava that has erupted from certain oceanic volcanoes contains material from the crust of early Earth, but decisive evidence has been elusive. A new study, published in the journal Nature, reveals that oceanic volcanic rocks contain samples of recycled crust dating back to the Archean era 2.5 billion years ago. Oceanic crust sinks below the Earth's mantle where two tectonic...

Waste Sulfur Transformed To Improve Batteries
2013-04-15 11:06:40

University of Arizona A new chemical process can transform waste sulfur into a lightweight plastic that may improve batteries for electric cars, reports a University of Arizona-led team. The new plastic has other potential uses, including optical uses. The team has successfully used the new plastic to make lithium-sulfur batteries. "We've developed a new, simple and useful chemical process to convert sulfur into a useful plastic," lead researcher Jeffrey Pyun said. Next-generation...

Fluffy Antarctic Snow Provides New Insights On Climate Cycles
2013-02-26 10:35:56

April Flowers for redOrbit.com - Your Universe Online A team of scientists, led by researchers at the University of California, San Diego, has found particles from the upper atmosphere trapped in a deep pile of Antarctic snow that hold clear chemical traces of global meteorological events. The study was published in the early online edition of the Proceedings of the National Academy of Sciences and suggests anomalies in oxygen found in sulfate particles coincide with several episodes of...

Cooking Up Our Solar System, What's The Recipe?
2013-02-21 05:05:42

April Flowers for redOrbit.com - Your Universe Online A research team from the University of California, San Diego is hoping to learn how our solar system evolved by studying the origins of different isotope ratios among the elements that make up today´s smorgasbord of planets, moons, comets, asteroids, and interplanetary ice and dust. The scientists are led by Mark Thiemens, Dean of the Division of Physical Sciences, who has worked on this problem for over three decades. Most...

2013-01-31 14:52:52

A systematic review published today in The Cochrane Library finds that in well-nourished adults current evidence does not support selenium for preventing heart disease. The review suggests that taking selenium supplements does not reduce a person's risk of developing heart disease, although most evidence is currently limited to healthy American adults. Diet is a key factor influencing heart disease risk. Selenium is one dietary element that could potentially play a role in preventing heart...

Microbes Produced Oxygen Well Before Great Oxidation Event
2012-09-25 06:15:10

Brett Smith for redOrbit.com - Your Universe Online Life on earth began in the oceans, but it would eventually spread to land and a new study suggests that land-dwelling bacteria could have covered large swaths of territory about 2.7 billion years ago, despite a thin ozone layer that would have offered little protection against the sun´s ultraviolet radiation. According to astrobiologists at the University of Washington, these earliest microbes produced oxygen and broke down...

2012-09-11 22:20:17

The study of an oxygen-sensing bacterial regulatory protein by chemistry researchers at the University of Georgia has provided molecular insight into the oxygen sensing mechanism, which could ultimately lead to a better understanding of the ageing process and new treatments for human diseases such cancer, Parkinson's and Alzheimer's. Michael Johnson, a distinguished research professor of chemistry in the UGA Franklin College of Arts and Sciences, and Bo Zhang, a UGA chemistry doctoral...


Word of the Day
monteith
  • A large punch-bowl of the eighteenth century, usually of silver and with a movable rim, and decorated with flutings and a scalloped edge. It was also used for cooling and carrying wine-glasses.
  • A kind of cotton handkerchief having white spots on a colored ground, the spots being produced by a chemical which discharges the color.
This word is possibly named after Monteith (Monteigh), 'an eccentric 17th-century Scotsman who wore a cloak scalloped at the hem.'
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