Why some greens turn brown in historical paintings

Enticed by the brilliant green hues of copper acetate and copper resinate, some painters in the Renaissance period incorporated these pigments into their masterpieces. However, by the 18th century, most artists had abandoned ...

Scientists patent new agent for X-ray

Russian scientists found that nanocrystal tungsten trioxide can be used instead of barium for X-ray examinations and also in cancer treatment. The results of the study are published in Journal of Nanomaterials.

Chemists develop a catalyst to oxidize alkanes in mild conditions

RUDN chemists developed a catalyst to oxidize alkanes without additional heating and under regular pressure. This will simplify the process of obtaining alcohols, acids, and other substances used to manufacture organic products. ...

How water fleas detect predators

Water fleas of the genus daphnia detect via chemical substances if their predators, namely Chaoborus larvae, are hunting in their vicinity. If so, they generate defences that make them more difficult to consume. The signalling ...

New material makes cooling devices more energy-efficient

Waste heat from industry can often not be utilised because of its low temperature. With this material, it can be used in environmentally friendly cooling systems for example in the field of building technology. The research ...

Newly designed molecule binds nitrogen

Wheat, millet and maize all need nitrogen to grow. Fertilisers therefore contain large amounts of nitrogenous compounds, which are usually synthesised by converting nitrogen to ammonia in the industrial Haber-Bosch process, ...

Scientists develop a new material for manipulating molecules

A scientist at the University of Córdoba, working with an international research team, has created a new porous single-crystal material that could have many applications in nanotechnology and catalysis.

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