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The Secret Contamination of Polar Bears

Hundreds of unrecognized halogenated contaminants discovered in polar bear serum

05-Dec-2018

Using a new approach to measure chemical contaminants in polar bears, scientists from Canada and the United States found a large variety of new chlorinated and fluorinated substances, including many new polychlorinated biphenyl metabolites. Worryingly, these previously unrecognized contaminants ...

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Lacquering before polishing

Technical Coatings for Additive Manufacturing

05-Dec-2018

Additive Manufacturing (AM) has many advantages: custom manufacturing, flexible production and easy customization, for example. Yet many products have a high surface roughness and porosity. The post processing of the thus fabricated parts is time consuming and often a significant cost factor for ...

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More sensitive MRI diagnostics thanks to innovative “elastic” contrast media

04-Dec-2018

Researchers from the Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP) have found a new method for obtaining high-quality images in magnetic resonance imaging (MRI), that requires less contrast medium compared to current methods. It is made possible by using an “elastic” protein ...

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Light triggers gold in unexpected way

Mechanism to control output of a nanoscale antenna

04-Dec-2018

Rice University researchers have discovered a fundamentally different form of light-matter interaction in their experiments with gold nanoparticles. They weren't looking for it, but students in the lab of Rice chemist Stephan Link found that exciting the microscopic particles just right produced ...

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Sweet lysine degradation

Glucogenic lysine degradation found for the first time

03-Dec-2018

In fact, they were looking for a specific enzyme. What they found is something so fundamental that their new findings might well find their way into textbooks. Referred to here is the amino acid lysine, which is an important building block in proteins. In bacteria and many other organisms, lysine ...

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Big results from small solutions

New method for analyzing metalloproteins

30-Nov-2018

A new method only needs a tiny liquid sample to analyze metalloproteins. This breakthrough was achieved by a research team led by Associate Professor Eiji Ohmichi and Tsubasa Okamoto at the Kobe University Graduate School of Science. Metalloproteins (also known as metal-binding proteins) play ...

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New catalyst produces cheap hydrogen

30-Nov-2018

The potential for the chemical storage of renewable energy in the form of hydrogen is investigated around the world."The Australian Government is interested in developing a hydrogen export industry to export our abundant renewable energy," said Professor O'Mullane from QUT's Science and ...

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Shedding a new light on optical trapping and tweezing

A new device for manipulating and moving tiny objects with light

29-Nov-2018

When you shine a beam of light on your hand, you don't feel much, except for a little bit of heat generated by the beam. When you shine that same light into a world that is measured on the nano- or micro scale, the light becomes a powerful manipulating tool that you can use to move objects around ...

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Disordered materials could be hardest, most heat-tolerant carbides

Simulations predict new class of carbides

28-Nov-2018

Materials scientists at Duke University and UC San Diego have discovered a new class of carbides expected to be among the hardest materials with the highest melting points in existence. Made from inexpensive metals, the new materials may soon find use in a wide range of industries from machinery ...

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How a small molecule promotes removal of excess cholesterol

28-Nov-2018

Scientists have determined the structure of the activated form of an enzyme that helps to return excess cholesterol to the liver. The research reveals how a drug-like chemical stimulates the action of the lecithin:cholesterol acyltransferase (LCAT) enzyme. It also suggests that future drugs using ...

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