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| Chemistry articles |
Night of the living enzyme
Inactive enzymes entombed in tiny honeycomb-shaped holes in silica can spring to life, scientists at the Department of Energy's Pacific Northwest National Laboratory have found.
Unfolded proteins may protect cells from dying
When cells get stressed, their proteins go unfolded. It's a reaction with a straightforward name: the unfolded protein response. Now, new research from Rockefeller University shows that this phenomenon actually serves a protective role; rather than a sign that the cells have given up, it may be a mechanism by which the cells cope with adversity.
Dual-function enzyme AIDS plants defense against fungi
Scientists studying a plant enzyme involved in producing chemicals for defense against fungal infections have found that this enzyme can perform two distinct functions depending on the raw materials present. The results include atomic-level protein structures that illustrate how distinct molecules take on similar shapes when bound with the enzyme, which makes the dual action possible.
Scientists discover new class of polymers
They said it couldn't be done. And that's what really motivated UD polymer chemist Chris Snively and Jochen Lauterbach, professor of chemical engineering at UD.
Metamaterials found to work for visible light
For the first time ever, researchers at the U.S. Department of Energy's Ames Laboratory have developed a material with a negative refractive index for visible light. Ames Laboratory senior physicist Costas Soukoulis, working with colleagues in Karlsruhe, Germany, designed a silver-based, mesh-like material that marks the latest advance in the rapidly evolving field of metamaterials, materials that could lead to a wide range of new applications as varied as ultrahigh-resolution imaging systems and cloaking devices.
Chemists make molecular rings in the shape of king solomon's knot
UCLA chemists have made, at the nanoscale, a molecular compound of interlocked rings that has the shape of the ancient King Solomon's knot, a symbol of wisdom that is thousands of years old and is widely used in architecture and works of art. The Bible portrays Solomon as great in wisdom, wealth and power.
Radiation degrades nuclear waste-containing materials faster tha expected
Minerals intended to entrap nuclear waste for hundreds of thousands of years may be susceptible to structural breakdown within 1,400 years, a team from the University of Cambridge and the Pacific Northwest National Laboratory reported in the Jan. 11 issue of Nature.
Hybrid molecule causes cancer cells to self-destruct
By joining a sugar to a short-chain fatty acid compound, Johns Hopkins researchers have developed a two-pronged molecular weapon that kills cancer cells in lab tests. The researchers cautioned that their double- punch molecule, described in the December issue of the journal Chemistry & Biology, has not yet been tested on animals or humans. Nevertheless, they believe it represents a promising new strategy for fighting the deadly disease.
Prussian blue for information storage
In the family of Prussian blue, there is a compound that can act as a switch: it is not magnetic at the outset, but it can become magnetized by the effect of light and return to its initial state by heating.
Chemistry of volcanic fallout reveals secrets of past eruptions
A team of American and French scientists has developed a method to determine the influence of past volcanic eruptions on climate and the chemistry of the upper atmosphere, and significantly reduce uncertainty in models of future climate change.
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Researchers clear way to stronger glass
Look at your window - not out it, but at it. Though the window glass looks clear, if you could peer inside the pane you would see a surprising molecular mess, with tiny particles jumbled together any which way.
Physicists discover structures of gold nanoclusters
Using different experimental techniques, two separate and independent research groups in collaboration with a team from the Center for Computational Materials Science (CCMS) at the Georgia Institute of Technology, have unveiled the size-dependent evolution of structural and electronic structural motifs of gold nanoclusters ranging in size from 11 to 24 atoms. The experiments, in conjunction with the theoretical analysis performed by the Georgia Tech team, show near perfect agreement pertaining to the cluster structures occurring in the experiments.
Tears reveal some of their deepest secrets to researchers
It's no secret why we shed tears. But exactly what our tears are made of has remained a mystery to scientists.
Mechanism of hallucinogens' effects discovered
The brain mechanism underlying the mind-bending effects of hallucinogens such as LSD, mescaline, and psilocybin has been discovered by neuroscientists. They said their discoveries not only shed light on the longtime mystery of how hallucinogens work, but that the findings also offer a pathway to understanding the function of drugs used to treat neuropsychiatric disorders, which are now being used largely without an understanding of their fundamental mechanism.
Cloning the smell of the seaside
Scientists from the University of East Anglia have discovered exactly what makes the seaside smell like the seaside – and bottled it!
Finding may unshackle the potential of composite materials
In an advance that could lead to composite materials with virtually limitless performance capabilities, a University of Wisconsin-Madison scientist has dispelled a 50-year-old theoretical notion that composite materials must be made only of "stable" individual materials to be stable overall.
Scientists create wrinkled polymer 'skin'
Scientists, including one affiliated with MIT, have demonstrated a new method for developing wrinkled hard skins on polymers using a focused ion beam.
Mit improves protein sorting with a new microchip
A new MIT microchip system promises to speed up the separation and sorting of biomolecules such as proteins. The work is important because it could help scientists better detect certain molecules associated with diseases, potentially leading to earlier diagnoses or treatments.
Yale chemists show that nature could have used different protein building blocks
Chemists at Yale have done what Mother Nature chose not to — make a protein-like molecule out of non-natural building blocks, according to a report featured early online in the Journal of the American Chemical Society.
Changing gold
Gold is not as noble and stable as previously thought. This is the conclusion of an international team of researchers from Germany, France and Sweden who came to the ESRF to study the structure of this material at high pressure. They present their results in Physical Review Letters.
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| Quotes | By convention!
cussed Tom airily.
Cmon Scully... Itll be a nice trip through the woods-Fox Mulder
But what ... is it good for?
Engineer at IBM, 1968, commenting on the microchip.
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