Chemistry articlesNew class of compounds promise better drugs, clean energy
By combining a common organic compound with a rare metal, a team of Brown University chemists has created a new class of molecules that have potentially important applications for the pharmaceutical, chemical and energy industries.
Chemists report progress in quest to use hydrogen as fuel for cars and electronic devices
Chemists at UCLA and the University of Michigan report an advance toward the goal of cars that run on hydrogen rather than gasoline. While the U.S. Department of Energy estimates that practical hydrogen fuel will require concentrations of at least 6.5 percent, the chemists have achieved concentrations of 7.5 percent - nearly three times as much as has been reported previously - but at a very low temperature (77 degrees Kelvin).
Scientists issue unprecedented forecast of next sunspot cycle
The next sunspot cycle will be 30-50% stronger than the last one and begin as much as a year late, according to a breakthrough forecast using a computer model of solar dynamics developed by scientists at the National Center for Atmospheric Research (NCAR). Predicting the Sun's cycles accurately, years in advance, will help societies plan for active bouts of solar storms, which can slow satellite orbits, disrupt communications, and bring down power systems.
Chemically squeezing every drop of ethanol from corn
Shanks, an Iowa State University associate professor of chemical and biological engineering, is leading a research team that's working to develop chemical catalysts that could boost ethanol production by increasing the yield of fermentable sugars from corn.
Sandia's Z machine exceeds two billion degrees kelvin
Sandia's Z machine has produced plasmas that exceed temperatures of 2 billion degrees Kelvin - hotter than the interiors of stars.
Atoms in a new state of matter behave like three musketeers: all for one, one for all
An international team of physicists has converted three normal atoms into a special new state of matter whose existence was proposed by Russian scientist Vitaly Efimov in 1970.
Nanoparticles facilitate chemical reactions
Using the unique properties of new nanometer-scale magnetic particles, researchers have for the first time separated for reuse two different catalysts from a multi-step chemical reaction done in a single vessel.
Researchers grow bone cells on carbon nanotubes
Researchers at the University of California, Riverside have published findings that show, for the first time, that bone cells can grow and proliferate on a scaffold of carbon nanotubes.
Freezing magnets with magnets
A "spin liquid" is a very unique, dynamic material in which each spin - the tiny magnetic field carried by an electron - is not frozen into place, producing clearly defined magnetic regions. Instead, the spins are free to change orientation. Because of this, external magnetic fields applied to spin liquids may produce changes that even extreme temperatures and pressures cannot.
Electrons in limbo seen for first time
Hrvoje Petek, University of Pittsburgh professor of physics and codirector of Pitt's Gertrude E. and John M. Petersen Institute of NanoScience and Engineering (PINSE), has published two papers in recent weeks that literally illuminate how electrons behave on various surfaces.
Wine with a double shot of Vitamin C?
Genetically designed grapes with elevated levels of vitamin C may be more than wishful thinking, according to researchers at the University of California, Davis, and the University of Adelaide, Australia, who recently identified an enzyme in grapes that helps convert vitamin C into tartaric acid, a key acid in winemaking.
The World's Fastest Measurements of Molecular Vibrations
When atoms or molecules are subject to a short, intense laser pulse, they emit high-frequency ultraviolet radiation. If you compare the spectra of isotopes that are of different masses but otherwise similar, you can use this measured radiation to determine the motion of the atoms. The research team used this method -with single, extremely short laser pulses - to make the fastest measurements of how a molecule changes over time.
Frictionless motion observed in water
Researchers at USC and Brown University said they have achieved near-frictionless motion in water by using lasers to spin a molecule like a propeller.
Does our 3-D world hold six other dimensions?
Imagine little flat people living on the surface of a piece of paper. Just the surface: their world is not even as thick as the paper, with no vertical dimension at all. Stick a pencil through the paper and all they would see is a circle, a two-dimensional cross section. Fold the paper or roll it up, and they wouldn't know the difference.
PHYSICISTS DEVISE NEW TECHNIQUE FOR DETECTING HEAVY WATER
Scientists at the California Institute of Technology have created a new method of detecting heavy water that is 30 times more sensitive than any other existing method. The detection method could be helpful in the fight against international nuclear proliferation.
Chemistry often seems to operate at random. However, scientists from the Max Planck Institute of Coal Research and the International Max Planck Research School "SurMat" have been able to change that: they grew silica particles from a solution onto a surface in such a way that a pattern of tiny little cones was regularly formed.
CHLORINE MAY CONTRIBUTE TO OZONE FORMATION
Standard methods of predicting air pollution don't take atmospheric chlorine into account, but the chemical could be responsible for 10 percent or more of daily ozone production in local air, research at UC Irvine has found.
researchers develop new-model of ice volume change based on earth's orbital patterns
Through dated geological records scientists have known for decades that variations in the Earth's orbit around the sun – subtle changes in the distance between the two – control ice ages
Water quality improvements likely using new understanding of ion interaction
Scientists at the U.S. Department of Energy's Argonne National Laboratory have discovered new ways that ions interact with mineral surfaces in water, opening a door to new knowledge on how contaminants travel in the environment. The insight, published in Physical Review Letters, leads to a better understanding of the factors that determine water quality
Liquid alloy shows solid-like crystal structure at surface
A substance used in nanotechnology contains unusual structures at its surface, a team of researchers led by Oleg Shpyrko, Distinguished Postdoctoral Fellow at the U.S. Department of Energy's Argonne National Laboratory has learned