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News articles about "Clusters"

Quantum mechanical calculations reveal the hidden states of enzyme active sites

Enzymes carry out fundamental biological processes such as photosynthesis nitrogen fixation and respiration with the help of clusters of metal atoms as active sites But scientists lack basic information about their function because the states ... - Read More

Wild molecular interactions in a new hydrogen mixture

Hydrogen the most abundant element in the cosmos responds to extremes of pressure and temperature differently Under ambient conditions hydrogen is a gaseous two atom molecule As confinement pressure increases the molecules adopt different states ... - Read More

Protein Found in Insect Blood That Helps Power Pests' Immune Responses

along a larger carbohydrate molecule that makes a cell wall Their work identified the spatial orientation of the GRP proteins in the cluster and showed that the protein carbohydrate complexes stimulate an immune response in ... - Read More

'Superglue' for the atmosphere: How sulfuric acid increases cloud formation

It has been known for several years that sulfuric acid contributes to the formation of tiny aerosol particles which play an important role in the formation of clouds The new study by Kürten et al ... - Read More

Fracking: Gas leaks from faulty wells linked to contamination in some groundwater

A study has pinpointed the likely source of most natural gas contamination in drinking water wells associated with hydraulic fracturing and it's not the source many people may have feared What's more the problem may ... - Read More

Chemical detection: A purer solution

A separation method that isolates protein protected gold clusters enables improved sensing of toxic mercury compounds and pesticides Fluorescence based detection of pesticides and other environmentally harmful chemicals is limited by the ability of current ... - Read More

Nanodiamonds are forever: Did comet collision leave layer of nanodiamonds across Earth?

Most of North America's megafauna mastodons short faced bears giant ground sloths saber toothed cats and American camels and horses disappeared close to 13 000 years ago at the end of the Pleistocene period The ... - Read More

Breaking benzene selectively, at relatively mild temperatures

Aromatic compounds are found widely in natural resources such as petroleum and biomass and breaking the carbon carbon bonds in these compounds plays an important role in the production of fuels and valuable chemicals from ... - Read More

Materials: Cubic cluster chills out

A gadolinium based material that can be cooled by varying a magnetic field may be useful for cooling low temperature sensors Magnetic refrigeration is attracting attention as an efficient way to chill sensitive scientific instruments ... - Read More

Nano-sized chip picks up scent of explosives molecules better than dog's nose

Security forces worldwide rely on sophisticated equipment trained personnel and detection dogs to safeguard airports and other public areas against terrorist attacks A revolutionary new electronic chip with nano sized chemical sensors is about to ... - Read More

Researchers discover boron 'buckyball'

The discovery 30 years ago of soccer ball shaped carbon molecules called buckyballs helped to spur an explosion of nanotechnology research Now there appears to be a new ball on the pitch Researchers from Brown ... - Read More

Labs characterize carbon for lithion-ion batteries

Lithium ion batteries could benefit from a theoretical model created at Rice University and Lawrence Livermore National Laboratory that predicts how carbon components will perform as electrodes The model is based on intrinsic electronic characteristics ... - Read More

Charging portable electronics in 10 minutes: New architecture for lithium-ion battery anodes far outperform the current standard

Researchers at the University of California Riverside Bourns College of Engineering have developed a three dimensional silicon decorated cone shaped carbon nanotube cluster architecture for lithium ion battery anodes that could enable charging of portable ... - Read More

Not all diamonds are forever: Researchers see nanodiamonds created in coal fade away in seconds

Images taken by Rice University scientists show that some diamonds are not forever The Rice researchers behind a new study that explains the creation of nanodiamonds in treated coal also show that some microscopic diamonds ... - Read More

Emissions from forests influence very first stage of cloud formation

Clouds play a critical role in Earth's climate Clouds also are the largest source of uncertainty in present climate models according to the latest report of the Intergovernmental Panel on Climate Change Much of the ... - Read More

Nanoscope to probe chemistry on the molecular scale

For years scientists have had an itch they couldn't scratch Even with the best microscopes and spectrometers it's been difficult to study and identify molecules at the so called mesoscale a region of matter that ... - Read More

New ultrasound device may add in detecting risk for heart attack, stroke

Researchers from North Carolina State University and the University of North Carolina at Chapel Hill have developed an ultrasound device that could help identify arterial plaque that is at high risk of breaking off and ... - Read More

First size-based chromatography technique for the study of livi

Using nanodot technology Berkeley Lab researchers have demonstrated the first size based form of chromatography that can be used to study the membranes of living cells This unique physical approach to probing cellular membrane structures ... - Read More

Engineers design 'living materials': Hybrid materials combine bacterial cells with nonliving elements that emit light

Inspired by natural materials such as bone a matrix of minerals and other substances including living cells MIT engineers have coaxed bacterial cells to produce biofilms that can incorporate nonliving materials such as gold nanoparticles ... - Read More

Oxygen's different shapes described

Oxygen 16 one of the key elements of life on earth is produced by a series of reactions inside of red giant stars Now a team of physicists including one from North Carolina State University ... - Read More
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