Tag: "atoms" at biology news
UCF scientists' molecular discovery could help drugs target unhealthy cells
...cule (anthraquinone) to pick up two carbon dioxide atoms
and carry them in a specific direction on a flat c...es. "It's significant because we wouldn't expect atoms
to move that way," said UCF physics professor Talat Rahman, who co-authored the study with Sergey St...
Nanotechnology for Biological, Biomedical and Chemical Sensing
...ialization. Nanotechnology's ability to manipulate atoms
and molecules enables us to create nanoscale materials and novel device structures with fundamentally new properties and unprecedented functions. Nanotechnology is anticipated to dramatically change every aspect of our lives. Among the diverse and in...
Nanotechnology meets biology and DNA finds its groove
... electrical and mechanical devices at the scale of atoms
and molecules. Using techniques typically reserved for the manufacture of computer chips, the Wisconsin team fabricated a mold for making a rubber template with slits narrow enough to confine single strands of elongated DNA. The new technique is ak...
Free public events at the 2007 AAAS Annual Meeting
...y, his groundbreaking work in cooling and trapping atoms
by using laser light led to the Nobel Prize in Physics in 1997, an honor he shared with two colleagues. Their discoveries, focusing on the so-called "optical tweezers" laser trap, were instrumental in the study of fundamental phenomena and in measuri...
Super-thin membrane, 50 atoms thick, sorts individual molecules
... He used such a thin piece of silicononly about 50 atoms
thickbecause it would allow him to use an electron microscope to see the crystal structure in his samples, formed with different heat treatments. Striemer found that as parts of the silicon contracted into crystals, holes opened up in their wakes. ...
Physicists reveal water's secrets in journal Science
... molecule of water chemically as H2O--two hydrogen atoms
bonded to one oxygen atom. Sounds simple, doesn't it? But liquid water is much more complex than that. "Water as a liquid is not simple at all and has several properties different from most other liquids," Szalewicz said. "For example, a well-known...
Largest physics meeting of the year, in Denver
...the impact of this theory on the study of not only atoms
and solids but also nuclei, quarks, and the cosmos itself. LATEST QUANTUM COMPUTER HARDWARE Physicists are pursuing several hardware options for making truly powerful quantum computers that would fulfill their potential of performing ultra-fast d...
Invisible for electrons
...anes - specifically, from a single layer of carbon atoms
called graphene. In order to fabricate graphene, o...ver, this surface still contains 30 million carbon atoms
that are all arranged on the free-hanging membrane. These ultra-thin membranes may find use, for ...
Bacterium could treat PCBs without the need for dredging
...etoxify PCBs the strong bonds between the chlorine atoms
and the biphenyl compounds that make up the PCB atomic structure need to be broken, a process known as dechlorination. More than two decades ago, scientists discovered that PCBs were slowly being dechlorinated by naturally occurring microbes, but des...
Progress toward artificial photosynthesis?
... intermediate step: the bonding of CO2 to nitrogen atoms
to form carbamates. The German researchers thus also experimented with nitrogen-rich catalysts with structures that allow them to form carbamates. Their new class of catalysts is made of flat, graphite-like layers. The individual layers consist of ri...
Test finds manufactured nanoparticles don't harm soil ecology
...cer balls. The full name for the cluster of carbon atoms
is buckminsterfullerene, after the American architect R. Buckminster Fuller. His design for the geodesic dome is much like the shape of Buckyballs. First found in a meteorite in 1969, buckyballs are among three known naturally occurring pure carbon...
Meat and two neutrons -- the key to a longer life
...s, like free radical attack. The isotopes replace atoms
in susceptible bonds making these bonds stronger. 'Because these bonds are so much more stable, it should be possible to slow down the process of oxidation and ageing,' Shchepinov says. The isotopes could be used in animal feed so that humans could...
Removing a hydrogen fuel-cell roadblock
...he membrane where they readily combine with oxygen atoms
to form water. But if the hydrogen gas contains im...s tough to handle because of the small size of the atoms
and because it naturally wants to bond with other elements," said Ames Laboratory scientist Alan Rus...
Structural basis for photoswitching in fluorescent proteins brought into focus
...orescent state of the molecule, two side chains of atoms
align in a coplanar fashion, flat and in orderly f... at all. However, when the chromophore (a group of atoms
and electrons forming part of an molecule) absorbs ultraviolet light, it occasionally ionizes and be...
New way to catch cancer's spread, rapid 3-D retinal imaging, more at CLEO/QELS 2007
... a second). Shining this ultrashort light pulse on atoms
and molecules can reveal new details of their inne...vepackets"specially tailored electron waves inside atoms
and molecules that may help scientists use lasers to change the course of chemical reactions for sci...
Where is the proton? Yale scientists discover footprints of shared protons
...extra proton is associated with a specific pair of atoms
on the two tethered molecules, participating in pa...ocally stable intermediate. In a sense, the oxygen atoms
in water molecules chaperone protons between oxygen and nitrogen atoms
on organic structures. For ex...
Diffraction and scattering -- the solution to what's in solution
... scientist at Argonne. "We discovered that the way atoms
interact is transferable with a lot more detail than what was previously thought. Hydrolysis of dissolved metal ions is one of the most fundamental and important reactions in aqueous chemistry. Experiments for this work were conducted at Argonnes ...
New report explores nanotechnology's future
...rs. As impressive as microscopes that "see" single atoms
and as the other tools in the current generation o...tion and construction of materials on the scale of atoms
and molecules. A nanometer is one-billionth of a meter, and nanotechnology typically deals with part...
Discovery of new family of pseudo-metallic chemicals
...n extremely stable molecule consisting of 12 boron atoms
and 12 hydrogen atoms. Known as "boron cages," these molecules were difficult to change or manipulate, and sat dormant in Hawthorne's laboratory for many years. Recently, Hawthorne's scientific team found a way to modify these cages, resulting i...
Satellites play vital role in understanding the carbon cycle
...this complex process. The total number of carbon atoms
on Earth is fixed they are exchanged between the ocean, atmosphere, land and biosphere. The fact that human activities are pumping extra carbon dioxide into the atmosphere, by fossil fuel burning and deforestation, is well known. Because of this, at...
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