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E.g., 08/18/2019
E.g., 08/18/2019
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Your search has returned 1851 articles:
  • News

    Chemists have created and imaged a new form of carbon

    An elusive wreath of carbon has made its long-awaited debut.

    Scientists created a molecule called cyclocarbon and imaged its structure, describing the ring of 18 carbon atoms online August 15 in Science. The work unveils a new face of one of chemistry’s most celebrated elements.

    “It’s not every day that you make a new form of carbon,” says chemist Rik Tykwinski of the University of...

    08/15/2019 - 14:53 Chemistry, Physics
  • News

    Fluid in superdeep diamonds may be from some of Earth's oldest unchanged material

    A surprisingly hardy reservoir of rock left over from just after Earth’s formation still lurks deep inside the planet, according to a new analysis of superdeep diamonds.

    Fluid trapped inside these diamonds, forged hundreds of kilometers underground in Earth’s mantle, bears the chemical signatures of rock that has remained relatively undisturbed for billions of years. This holdout of...

    08/15/2019 - 14:00 Earth, Chemistry
  • Teaser

    A fungus makes a chemical that neutralizes the stench of skunk spray

    A puppy pal that gets sprayed by a skunk is no friend to human noses. The nasty odor can linger for weeks or more.

    But at least one kind of Tolypocladium fungi makes a chemical that can snuff out the stink. Called pericosine, it reacts with skunk spray’s sulfur-containing compounds, forming residues that aren’t offensive to the nose and can be more easily washed away, researchers report...

    08/06/2019 - 10:00 Chemistry, Animals, Fungi
  • News

    Tiny magnetic coils could help break down microplastic pollution

    A new way to decompose microplastics could help clear waterways of these tiny bits of trash, which may pose health risks to people and other animals.

    Water treatment plants typically aren’t equipped to filter out microplastics, such as exfoliating beads or flakes broken off larger pieces of garbage, like water bottles (SN: 8/9/14, p. 9). Those pesky particles can take decades to break...

    07/31/2019 - 11:00 Pollution, Chemistry, Technology
  • News

    Droplets of these simple molecules may have helped kick-start life on Earth

    For the origin of life on Earth, ancient puddles or coastlines may have had a major ripple effect.

    A new study shows that a simple class of molecules called alpha hydroxy acids forms microdroplets when dried and rewetted, as could have taken place at the edges of water sources. These cell-sized compartments can trap RNA, and can merge and break apart — behavior that could have encouraged...

    07/22/2019 - 15:24 Chemistry, Evolution, Cells
  • Feature

    How seafood shells could help solve the plastic waste problem

    Lobster bisque and shrimp cocktail make for scrumptious meals, but at a price. The food industry generates 6 million to 8 million metric tons of crab, shrimp and lobster shell waste every year. Depending on the country, those claws and legs largely get dumped back into the ocean or into landfills.

    In many of those same landfills, plastic trash relentlessly accumulates. Humans have...

    06/19/2019 - 11:00 Chemistry, Materials, Sustainability
  • Reviews & Previews

    Carbon plays a starring role in the new book ‘Symphony in C’

    Symphony in CRobert M. HazenW.W. Norton & Co., $26.95

    Carbon is by no means the most abundant element in the cosmos, but it is undoubtedly the most important to life as we know it. For every 1,000 hydrogen atoms in the universe, there are only five or so carbon atoms. But every cell in the human body — indeed, every living cell on Earth — relies on carbon as the chemical...

    06/10/2019 - 06:00 Chemistry, Evolution, Cosmology, Ecosystems
  • News

    Vaping the sweetener sucralose may produce toxic chemicals

    Lacing e-cigarette liquid with sucralose is probably not a sweet idea. Vaping the synthetic sweetener may generate harmful chemicals, researchers report May 13 in Chemical Research in Toxicology.

    “I would strongly advise that users should not use liquids with sucralose in them,” says Sven Jordt, a toxicologist at Duke University School of Medicine who was not involved with the study....

    05/30/2019 - 07:00 Chemistry, Health
  • News in Brief

    Sweaty, vinegary and sweet odors mingle to make dark chocolate’s smell

    Scientists have sniffed out the chemicals that give some dark chocolates their smell.

    The compounds that mingle to make the candy’s aroma include pleasant-smelling ones such as vanillin, which gives vanilla its smell, and flowery linalool. But other molecules produce smoky or vinegary odors and even one that smells like sweat, researchers report online May 8 in the Journal of...

    05/23/2019 - 07:00 Chemistry
  • News

    Emissions of a banned ozone-destroying chemical have been traced to China

    China has continued producing an ozone-destroying chemical called CFC-11 in violation of an international agreement, an analysis of atmospheric gas finds.

    Air samples collected in South Korea and Japan suggest that eastern China emitted around 7,000 metric tons more trichlorofluoromethane a year from 2014 to 2017 than it did from 2008 to 2012. This boost in emissions explains a large...

    05/22/2019 - 13:00 Pollution, Chemistry