News Chemistry

The Hindu : Sci-Tech / Science : Dawn probe reaches asteroid belt between Mars, Jupiter

2011-07-16T05:44:00.000-07:00

The Hindu : Sci-Tech / Science : Dawn probe reaches asteroid belt between Mars, Jupiter

The universe may have been born spinning, according to new findings on the symmetry of the cosmos

2011-07-12T07:19:00.000-07:00

The universe may have been born spinning, according to new findings on the symmetry of the cosmos

(PhysOrg.com) -- Physicists and astronomers have long believed that the universe has mirror symmetry, like a basketball. But recent findings from the University of Michigan suggest that the shape of the Big Bang might be more complicated than previously thought, and that the early universe spun on an axis.

Plutonium tricks cells by 'pretending' to be iron

2011-07-12T07:14:00.000-07:00

Plutonium tricks cells by 'pretending' to be iron

(PhysOrg.com) -- Plutonium gets taken up by our cells much as iron does, even though there's far less of it to go around.

A better way to photo gray: New technology allows lenses to change color rapidly

2011-07-12T07:10:00.000-07:00

A better way to photo gray: New technology allows lenses to change color rapidly

A University of Connecticut scientist has perfected a method for creating quick-changing, variable colors in films and displays, such as sunglasses, that could lead to the next hot fashion accessory.

New microscopy tracks molecules in live tissue at video rate; scientists push SRS microscopy to new levels of spatial, temporal precision

2010-12-04T08:52:00.000-08:00

A novel type of biomedical imaging, made possible by new advances in microscopy, is so fast and sensitive it can capture "video" of blood cells squeezing through capillaries. The new technique makes possible label-free chemical movies, with streaming footage at the subcellular level, catching video of proteins, lipids, and water within cells........

Novel metal catalysts may be able to turn greenhouse gases into liquid fuels

2010-12-04T08:50:00.000-08:00

It sounds a bit like spinning straw into gold, but novel metal catalysts may be able to turn greenhouse gases like methane and carbon dioxide into liquid fuels without producing more carbon waste in the process.

Chemists find an easier way to synthesize new drug candidates; New method could have a big impact on pharmaceutical business

2010-07-02T23:42:00.001-07:00

Chemists have designed a new way to attach a trifluoromethyl group to certain compounds, which they believe could allow pharmaceutical companies to create and test new drugs much faster and potentially reduce the cost of drug discovery. The new synthesis could have an immediate impact.[...]

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New technique improves efficiency of biofuel production

2010-07-02T23:34:00.001-07:00

Researchers have developed a more efficient technique for producing biofuels from woody plants that significantly reduces the waste that results from conventional biofuel production techniques. The technique is a significant step toward creating a commercially viable new source of biofuels.[...]

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Electrons are late starters: Contrary to previous assumptions, electrons are catapulted out of an atom during photoemission with a delay

2010-07-02T23:30:00.000-07:00

When physicists search for new semiconductors for chips or lasers, they have been able to rely on sophisticated computer programs - until now. However, it is possible that the models these programs have used to predict the electronic properties of a material oversimplify reality. An international team has now determined this from measurements with extremely short laser pulses. The physicists have concluded from this that electrons which a laser pulse knock out of an atom are catapulted from the particle with a delay of several tens of attoseconds. One attosecond corresponds to a billionth of a billionth of a second. The assumption so far has been that, during photo emission, electrons immediately shoot out when the light pulse impinges on the material. The models with which quantum physicists describe the electronic properties of matter are also based on the electrons behaving in such a way. These models could therefore be too imprecise, at least as far as very accurate predictions are concerned.[...]

Second 'quantum logic clock' based on aluminum ion is now world's most precise clock

2010-02-08T22:30:00.001-08:00

Physicists have built an enhanced version of an experimental atomic clock based on a single aluminum atom that is now the world's most precise clock, more than twice as precise as the previous pacesetter based on a mercury atom. The new aluminum clock would neither gain nor lose one second in about 3.7 billion years.[....]

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Using data from the NASA/ESA Hubble Space Telescope, astronomers have created a demographic A major hurdle in the ambitious quest to design and construct a radically new kind of quantum computer has been finding a way to manipulate .......
Applied electric field can significantly improve hydrogen storage properties An international team of researchers has identified a new theoretical approach that may one day make the synthesis of hydrogen .......
Nano imagining takes turn for the better: Photothermal technique provides new way to track nanoparticles Scientists researching how nanomaterials align have found a way to use gold nanorods as orientation seScientists researching how nanomaterials align have .......

Sunny Record: Breakthrough for Hybrid Solar Cells

2010-02-07T23:44:00.000-08:00

Scientists in Germany have succeeded in developing a method for treating the surface of nanoparticles which greatly improves the efficiency of organic solar cells. The researchers were able to attain an efficiency of 2 percent by using so-called quantum dots composed of cadmium selenide. These measurements, well above the previous efficiency ratings of 1 to 1.8 percent, were confirmed.[....]

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Soc i al scie n ti sts build case for 'survival of the kindest' : Researchers are challenging long-held beliefs that human beings are wired to be selfish. In a wide range of studies, social scientists are amassing a growing body ..........

B rightness variations of sun-like stars: The mystery deepens :An extensive study made with ESO’s Very Large Telescope deepens a long-standing mystery in the study of stars similar to the Sun. Unusual year-long variations in the brightness ............

Glo b al S ur face Temperature Was Second Warmest For September :The combined global land and ocean surface temperature was the second warmest September on record, according to NOAA...........

Quantum mechanics at work in photosynthesis: Algae familiar with these processes for nearly two billion years

2010-02-07T06:44:00.000-08:00

Chemists have made a major contribution to the emerging field of quantum biology, observing quantum mechanics at work in photosynthesis in marine algae .....full article

Find More Posts on STUDENT'S VIEW AND REVIEW

Using data from the NASA/ESA Hubble Space Telescope, astronomers have created a demographic
A major hurdle in the ambitious quest to design and construct a radically new kind of quantum computer has been finding a way to manipulate.......
Applied electric field can significantly improve hydrogen storage properties
An international team of researchers has identified a new theoretical approach that may one day make the synthesis.......
Fog discovered on Saturn's largest moon, Titan
Saturn's largest moon, Titan, looks to be the only place in the solar system -- aside from our home planet, Earth.......

Nano imagining takes turn for the better: Photothermal technique provides new way to track nanoparticles

2010-02-06T03:51:00.000-08:00

Scientists researching how nanomaterials align have found a way to use gold nanorods as orientation sensors by combining their plasmonic properties with polarization imaging techniques.[...]

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Toward safer plastics that lock in potentially harmful plasticizers :Scientists have published the first report on a new way of preventing potentially harmful plasticizers ........
Computers that use light instead of electricity? First germanium laser created Researchers have demonstrated the first laser built from germanium that can emit wavelengths of light useful for optical........

Where did today's spiral galaxies come from? Using data from the NASA/ESA Hubble Space Telescope, astronomers have created a demographic census of galaxy types and shapes from a time ..........

Scientists demonstrate world's fastest graphene transistor; holds promise for improving performance of transistors

2010-02-06T03:46:00.001-08:00

IBM researchers have demonstrated a radio-frequency graphene transistor with the highest cut-off frequency achieved so far for any graphene device -- 100 billion cycles/second (100 GigaHertz). The high frequency record was achieved using wafer-scale, epitaxially grown graphene using processing technology compatible to that used in advanced silicon device fabrication.[....]

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Ultra-cold chemistry: First direct observation of exchange process in quantum gas

2010-02-05T06:30:00.001-08:00

Considerable progresses made in controlling quantum gases open up a new avenue to study chemical processes. An Austrian research team has now succeeded in directly observing chemical exchange processes in an ultra-cold sample of cesium atoms and Feshbach molecules.[...]

Computers that use light instead of electricity? First germanium laser created

2010-02-05T06:28:00.001-08:00

Researchers have demonstrated the first laser built from germanium that can emit wavelengths of light useful for optical communications. It's also the first germanium laser to operate at room temperature. Unlike the materials typically used in lasers, germanium is easy to incorporate into existing processes for manufacturing silicon chips. So the result could prove an important step toward computers that move data -- and maybe even perform calculations -- using light instead of electricity.[....]

Merging galaxies create a binary quasar

2010-02-05T06:26:00.001-08:00

Astronomers have found the first clear evidence of a binary quasar within a pair of actively merging galaxies. Binary quasars, like other quasars, are thought to be the product of galaxy mergers. Until now, however, binary quasars have not been seen in galaxies unambiguously in the act of merging. But images the Magellan telescope in Chile show two distinct galaxies with "tails" produced by their mutual gravitational attraction.[....]

Superconducting hydrogen? Researchers model three hydrogen-dense metal alloys

2010-02-01T04:09:00.001-08:00

Physicists have long wondered whether hydrogen could be transformed into a metal or a superconductor -- the elusive state in which electrons can flow without resistance. They have speculated that certain pressure and temperature conditions could achieve these goals. Now high-pressure researchers have modeled three hydrogen-dense metal alloys and found pressure and temperature trends associated with the superconducting state -- a huge boost in understanding how this abundant material could be harnessed.[...]

Gene function discovery: New computation model predicts gene function

2010-02-01T04:05:00.001-08:00

Scientists have created a new computational model that can be used to predict gene function of uncharacterized plant genes with unprecedented speed and accuracy. The network, dubbed AraNet, has over 19,600 genes associated to each other by over 1 million links and can increase the discovery rate of new genes affiliated with a given trait tenfold. It is a huge boost to fundamental plant biology and agricultural research.[...]

Gecko's lessons transfer well: Dry printing of nanotube patterns to any surface could revolutionize microelectronics

2010-01-31T06:10:00.001-08:00

Scientists have come up with a way to transfer forests of strongly aligned, single-walled carbon nanotubes from one surface to another -- any surface -- in a matter of minutes. The template used to grow the nanotubes, with its catalyst particles still intact, can be used repeatedly to grow more nanotubes, almost like inking a rubber stamp.[...]

Plasma experiments aboard International Space Station yielding better picture of liquids and solids

2010-01-31T06:07:00.000-08:00

A series of experiments studying complex plasmas is taking place on board the international space station ISS. Physicists from Germany will use these experiments to study fundamental structure forming processes to better understand what happens in liquids and solids.[...]

Black hole hunters set new distance record

2010-01-31T06:05:00.001-08:00

Astronomers using ESO's Very Large Telescope have detected, in another galaxy, a stellar-mass black hole much farther away than any other previously known. With a mass above fifteen times that of the Sun, this is also the second most massive stellar-mass black hole ever found. It is entwined with a star that will soon become a black hole itself.[...]

Close-up photos of dying star show our sun's fate

2009-12-17T21:32:00.001-08:00

About 550 light-years from Earth, a star like our Sun is writhing in its death throes. Chi Cygni has swollen in size to become a red giant star so large that it would swallow every planet out to Mars in our solar system. Moreover, it has begun to pulse dramatically in and out, beating like a giant heart. New close-up photos of the surface of this distant star show its throbbing motions in unprecedented detail.[....]

Entropy alone can create complex crystals from simple shapes; tetrahedra packing record broken

2009-12-10T22:39:00.000-08:00

In a study that elevates the role of entropy in creating order, research led by the University of Michigan shows that certain pyramid shapes can spontaneously organize into complex quasicrystals.A quasicrystal is a solid whose components exhibit long-range order, but without a single pattern or a unit cell that repeats.
A paper on the findings appears in the Dec. 10 issue of Nature. Researchers from Case Western Reserve University and Kent State University collaborated on the study.
Entropy is a measure of the number of ways the components of a system can be arranged. While often linked to disorder, entropy can also cause objects to order. The pyramid shape central to this research is the tetrahedron---a three-dimensional, four-faced, triangular polyhedron that turns up in nanotechnology and biology.[...]

Smallest Nanoantennas For High-speed Data Networks

2009-10-20T22:21:00.001-07:00

More than 120 years after the discovery of the electromagnetic character of radiowaves by Heinrich Hertz, wireless data transmission dominates information technology. Higher and higher radio frequencies are applied to transmit more data. Some years ago, scientists found that light waves might also be used for radio transmission. So far, manufacture of the small antennas has required an enormous expenditure. Scientists have now succeeded in specifically and reproducibly manufacturing smallest optical nanoantennas from gold.[...]