Keyword: chemistry

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  • Something odd: Tetraxenongold

    08/18/2010 8:51:31 AM PDT · by OneWingedShark · 23 replies
    Self ^ | 18 Aug 10 | Self
    I was browsing around wikipedia and came across this: http://en.wikipedia.org/wiki/Tetraxenonogold%28II%29 It's really odd because Gold and Xenon are both notoriously unreactive. Now I don't know a lot about chemistry, but this piques my interest (on account of its extreme weirdness) and I was wondering if any of my fellows here might know about its physical properties.
  • A Cheap, Fast Way to Write Nanoscale Patterns

    08/06/2010 9:33:02 PM PDT · by neverdem · 10 replies
    ScienceNOW ^ | August 6, 2010 | Robert F. Service
    Enlarge Image Hybrid. A new nanopatterning technique combines the advantages of near-field microscopy with photolithography. Credit: Mirkin Group/International Institute for Nanotechnology, Northwestern University Today's microchips, communications gear, and medical diagnostics are typically made by writing nanoscale patterns over large areas of silicon wafers and other high-tech materials. The process is either extremely expensive or painfully slow, however. Now scientists have come up with a hybrid approach that could offer researchers a way to craft prototype nanoscale devices quickly and cheaply, speeding up the already blistering pace of developments in the field. The standard computer chip–patterning technique, called photolithography, works...
  • Revealing fake money

    07/02/2010 10:00:04 PM PDT · by neverdem · 22 replies · 4+ views
    Highlights in Chemical Science ^ | 02 July 2010 | Rebecca Brodie
    A simple and fast technique to examine the surface of banknotes and identify counterfeits has been developed by scientists in Brazil and the US.The counterfeiting of banknotes is a global problem that is increasing in scale and sophistication. Counterfeiters now use computerised reproduction methods like scanners and laser printers to copy real notes, and gone are the days when a fake could be spotted by simply testing the look and feel of the paper.The new technologies used by counterfeiters have thrown out a challenge to law enforcement. 'Forensic laboratories are therefore confronted with an increasing demand to analyse larger numbers...
  • AQ IN NORTHERN IRAQ: SEEKING A CHEMIST OR BIOLOGIST

    06/07/2010 3:04:24 PM PDT · by Cindy · 9 replies · 37+ views
    INTERNET HAGANAH.com ^ | June 7, 2010 | n/a
    07 June 2010 "AQ IN NORTHERN IRAQ: SEEKING A CHEMIST OR BIOLOGIST"
  • Setting traps for uranium

    05/23/2010 8:58:49 PM PDT · by neverdem · 17 replies · 468+ views
    Highlights in Chemical Science ^ | 21 May 2010 | Yuandi Li
    It could be possible to get uranium from seawater in the future, claim US scientists who have devised a new way to extract uranyl ions from aqueous solutions. With the rapid depletion of fossil fuels, the search for alternative power sources is becoming increasingly important. One alternative is nuclear fission, making uranium - the fuel used in nuclear reactors - an important target for isolation. Although uranium is currently extracted from solid ores such as uraninite, it also exists in large quantities as uranyl ions (UO22+) in seawater. However, due to its distinctive shape that prevents the use of conventional...
  • Light sparks new approach to data storage

    05/23/2010 8:08:54 PM PDT · by neverdem · 17 replies · 688+ views
    Chemistry World ^ | 23 May 2010 | Jon Cartwright
    Chemists in Japan have created the first material that can undergo a photoreversible transition from metal to semiconductor. The breakthrough heralds applications in ultra high density data storage, with 500 times the density of a Blu-ray disc.The past decade has seen a growing interest in ways to switch the physical properties of matter. Temperature and pressure can both turn materials, say, from insulators to metals, or from non-magnetic to magnetic, but they are difficult to control in complex memory devices. As a result, researchers have been looking at photoinduced phase transitions, for which the key stimulus is laser light. Recently, laser...
  • Producing hydrogen from sea water

    05/03/2010 10:50:42 PM PDT · by neverdem · 54 replies · 1,257+ views
    Chemistry World ^ | 28 April 2010 | Mike Brown
    A new catalyst that generates hydrogen from sea water has been developed by scientists in the US. This new metal-oxo complex displays high catalytic activity and stability, whilst being low cost, the researchers say.Hydrogen is very attractive as a clean source of power. Currently, it is produced by natural gas reforming - where steam is reacted with methane in the presence of a nickel catalyst to form hydrogen - but this method produces the greenhouse gas carbon dioxide.Jeffrey Long and colleagues from the University of California, Berkeley, prepared a simple molybdenum-oxo complex that can serve as an electrocatalyst, reducing the energy required to generate hydrogen...
  • Jet fuels from biomass

    04/30/2010 8:15:19 PM PDT · by neverdem · 10 replies · 435+ views
    Highlights in Chemical Science ^ | 27 April 2010 | Nicola Wise
    Biomass-derived fuels take a step closer to solving the energy problem thanks to a new process developed by US scientists. As fossil fuel resources continue to diminish, there is a greater need for developing new approaches for producing fuels from renewable resources. Solar cells and hydrogen fuel could provide long term solutions but the most immediate option is substitution of petrol with biofuels. First-generation biofuels such as bioethanol and biodiesel have shown this is possible but they can only satisfy a small portion of the energy demands of the transportation sector and they also use edible biomass as a feedstock increasing competition...
  • New Element Discovered! But don't ask about its name.

    04/07/2010 12:47:04 AM PDT · by smokingfrog · 8 replies · 474+ views
    discoverymag ^ | 4-6-10 | Smriti Rao
    A little square that has been left blank on the periodic table for all these years might finally be filled in. A team of American and Russian scientists have just reported the synthesis of a brand new element–element 117. Says study coauthor Dawn Shaughnessy: “For a chemist, it’s so fundamentally cool” to fill a square in that table [The New York Times]. If other scientists confirm the discovery, the still-unnamed element will take its place between elements 116 and 118, both of which have already been tracked down. A paper about element 117 will soon be published in Physical Review...
  • Hydrocarbon turns superconductor

    03/04/2010 6:44:19 PM PST · by neverdem · 15 replies · 659+ views
    Chemistry World ^ | 03 March 2010 | Jon Cartwright
    Researchers in Japan have created the first superconducting material based on a molecule of carbon and hydrogen atoms. Although the superconducting transition occurs at a chilly 18K, the simplicity of the molecule, which consists of just five benzene rings, suggests that it will open the door to other molecules that have higher transition temperatures.Superconductivity occurs when a material is cooled below a certain transition temperature (Tc) so that its electrical resistance disappears. The first superconductors were pure metals and had Tc  values close to absolute zero, but over the past 25 years scientists have begun to discover various 'high-Tc' materials, including...
  • To catch a cheating athlete (2010 Winter Olympics)

    02/20/2010 3:12:12 PM PST · by neverdem · 13 replies · 824+ views
    Chemistry World ^ | 08 February 2010 | Rajendrani Mukhopadhyay
    /Washington DC, USAs the athletes take centre stage at the Vancouver 2010 Winter Olympics and Paralympic Winter Games this month, chemists will be hard at work behind the scenes to catch athletes looking to win by taking drugs or blood products to artificially boost their performance during the competition.Doping is as old as the games - the ancient Greeks ate special diets and potions to enhance their athletic prowess - but over time, the practice has become considerably more sophisticated. Sports authorities began introducing drug testing in the 1970s and today, a variety of techniques exist in specialised anti-doping laboratories to catch...
  • Dipstick test for toxic lead

    02/01/2010 1:29:34 PM PST · by neverdem · 10 replies · 283+ views
    Highlights in Chemical Science ^ | 01 February 2010 | Victoria Steven
    Scientists in the United States have produced a simple dipstick test for detecting lead levels in paints. Easy-to-use biosensors are important for detection of highly toxic trace metal ions in the environment. Cross-linked gold nanoparticles modified with metal-specific DNAzymes have been used in solution to create highly sensitive and selective colorimetric metal sensors based on the colour change between aggregated (blue) and dispersed (red) gold nanoparticles. However, in solution the colour change can be difficult to distinguish and nanoparticle stability is poor, explains Yi Lu at the University of Illinois at Urbana Champaign. Lu and colleagues have developed a sensor that uses...
  • Symmetry springs a surprise

    01/13/2010 4:49:33 PM PST · by neverdem · 10 replies · 522+ views
    Highlights in Chemical Science ^ | 12 January 2010 | David Barden
    Usually, you'd expect two compounds with the same composition, atom-to-atom connectivity and symmetry to be chemically identical too. But scientists investigating metal-organic frameworks have discovered a surprising exception to this rule by identifying two isomers with the same symmetry and bonding but different gas storage properties. A team led by Shengqian Ma at the Argonne National Laboratory, Illinois, US, investigated a rod-like tetracarboxylate molecule (ebdc) which can bind to a metal atom from any one of four binding points, one at each corner of a rectangle. When it was heated with a copper salt at 75 °C, a crystal phase formed...
  • Cutting edge chemistry in 2009

    12/27/2009 7:39:58 PM PST · by neverdem · 7 replies · 646+ views
    Chemistry World ^ | 18 December 2009 | Nina Notman
    What revelations caused the biggest buzz in chemistry labs around the globe during 2009? With the help of an expert panel of journal editors, Chemistry World reviews the ground-breaking research and important trends of the year's published chemical science papers. Life in 3D DNA origami, the folding of DNA into shapes on the nanoscale, moved from 2D into 3D during 2009. Hao Yan's team at Arizona State University kicked off this craze with a tetrahedron shaped 3D container made of DNA.1 A day later, Danish researchers led by Kurt Gothelf, from Aarhus University, published details of a nanosized 3D DNA...
  • By Happy Accident, Chemists Produce a New Blue

    11/27/2009 10:40:14 PM PST · by neverdem · 30 replies · 2,297+ views
    NY Times ^ | November 24, 2009 | KENNETH CHANG
    Blue is sometimes not an easy color to make. Blue pigments of the past have often been expensive (ultramarine blue was made from the gemstone lapis lazuli, ground up), poisonous (cobalt blue is a possible carcinogen and Prussian blue, another well-known pigment, can leach cyanide) or apt to fade (many of the organic ones fall apart when exposed to acid or heat). So it was a pleasant surprise to chemists at Oregon State University when they created a new, durable and brilliantly blue pigment by accident. The researchers were trying to make compounds with novel electronic properties, mixing manganese oxide,...
  • How Crystals Get Their Groove Back

    11/22/2009 10:32:39 AM PST · by neverdem · 11 replies · 703+ views
    ScienceNOW Daily News ^ | 20 November 2009 | Michael Torrice
    Enlarge ImageBetter angle. Computer-simulated molecules crystallize faster in the more comfy 70-degree groove (left) than the cramped 45-degree wedge (right). Credit: A. J. Page and R. P. Sear, J. A. Chem. Soc., Online publication (11/13/2009) If you ever took a chemistry lab class in college, chances are you once stared desperately at a flask of liquid, crossing your fingers for tiny crystals to appear. Your lab instructor may have offered advice that sounded like voodoo: "Scratch the inside of the flask to make the crystal grow." But the trick worked--and now scientists have uncovered new details behind it. Compared...
  • Insect Wing Photocopied for Good

    11/16/2009 9:05:06 AM PST · by GodGunsGuts · 39 replies · 1,922+ views
    CEH ^ | November 15, 2009
    Nov 15, 2009 — Biomimetics is the new science of imitating nature – but why not save a step, and just copy the design directly?  That’s what Aussie and British researchers did.  They wanted a self-cleaning surface that could repel moisture and dust, so they made a template of an insect wing.  And why not?  “Insects are incredible nanotechnologists,” reported Science Daily.  Their wings are self-cleaning, frictionless and super-water-repellant. Insect wings have these properties due to their properties at the scale of billionths of a meter.  “For instance, some wings are superhydrophobic, due to a clever combination of natural chemistry...
  • Carbonic acid captured

    11/13/2009 11:09:45 PM PST · by neverdem · 9 replies · 739+ views
    Chemistry World ^ | 12 November 2009 | Simon Hadlington
    Scientists from Germany and Israel have caught a fleeting glimpse of carbonic acid, the simple yet elusive molecule that plays a key role in nature, from regulating the pH of blood to mediating crucial events in the global carbon cycle. And it appears that the acid is not as weak as the textbooks would have us believe.Carbonic acid, the hydrated form of carbon dioxide, is an important molecule that is involved in buffering biological fluids such as blood and is a key intermediate in the exchange of carbon dioxide between the atmosphere and the oceans. However, it is so short-lived in solution...
  • Sir Ambrose Fleming: Father of Modern Electronics (and Creationist!)

    11/09/2009 5:50:41 PM PST · by GodGunsGuts · 18 replies · 1,081+ views
    ACTS & FACTS ^ | November 2009 | Jerry Bergman, Ph.D.
    Sir Ambrose Fleming: Father of Modern Electronics --snip-- Sir John Ambrose Fleming was a leader in the electronics revolution that changed the world. As a professor at a major university, he carefully researched the evidence for Darwinism, concluding that the theory is not supported by science. He also influenced hundreds of students to evaluate the evidence in science for Darwinism. An outstanding scientist and creationist, he played a significant role in the development and maturation of the early creation movement. As Travers and Muhr wrote, he "had an unusually long and active life," and his life changed the world as...
  • Nerve gas detection in a fraction of a second

    10/03/2009 10:23:04 PM PDT · by neverdem · 6 replies · 701+ views
    Chemistry World ^ | 24 September 2009 | Lewis Brindley
    A new molecule that detects and destroys lethal nerve gases has been developed by researchers in the US. It is hoped that the research will help develop new early-warning systems against chemical weapon attacks, and possibly give rise to an effective antidote. Originally developed during the lead up to the second world war, organophosphorus nerve gases such as sarin, tabun and soban are odourless and colourless - and exposure to even a small amount can be fatal within minutes. Despite being outlawed by chemical weapons conventions in the 1990s, their relatively straightforward chemical structure means they could conceivably be deployed by...
  • Element 114 confirmed

    10/03/2009 7:46:52 AM PDT · by neverdem · 26 replies · 1,059+ views
    Chemistry World ^ | 30 September 2009 | Phillip Broadwith
    US scientists have confirmed the discovery of element number 114, first made over a decade ago by a team in Russia. By smashing a high energy beam of calcium-48 ions into a plutonium-242 target, the US team managed to detect two nuclei of element 114, which is predicted by some to be bordering the so-called 'island of stability' for superheavy atoms.Yuri Oganessian and his team at Dubna, Russia, were the first to claim to have created nuclei of element 114 - but any such claim has to be thoroughly verified and the experiments repeated independently before the element can be considered for admission...
  • When heated, high-fructose corn syrup can be dangerous

    10/02/2009 9:34:30 PM PDT · by neverdem · 114 replies · 2,646+ views
    R&D Daily ^ | August 26, 2009 | NA
    Researchers have established the conditions that foster formation of potentially dangerous levels of a toxic substance in the high-fructose corn syrup (HFCS) often fed to honey bees. Their study, which appears in the current issue of ACS' bi-weekly Journal of Agricultural and Food Chemistry, could also help keep the substance out of soft drinks and dozens of other human foods that contain HFCS. The substance, hydroxymethylfurfural (HMF), forms mainly from heating fructose. In the new study, Blaise LeBlanc and Gillian Eggleston and colleagues note HFCS's ubiquitous usage as a sweetener in beverages and processed foods. Some commercial beekeepers also feed...
  • Venom attracts decapitating flies (venom of fire ants)

    09/18/2009 10:28:41 PM PDT · by neverdem · 34 replies · 1,322+ views
    Science News ^ | September 18th, 2009 | Rachel Ehrenberg
    Chemistry may help scientists improve control of invasive fire ants A fire ant’s weapon is also its weakness. The insect’s venom attracts parasitic flies, which bring about a slow ant death that ends in decapitation, scientists report in an upcoming Naturwissenschaften. By identifying venom alkaloids that attract the flies, researchers may be able to better monitor populations of the pests and their enemies and to design improved fire ant control strategies. Fire ants were imported from South America in the early 20th century and, with little competition and no natural enemies, quickly became a major pest in the southeastern United...
  • Daisy-chain polymers bring artificial muscles a step closer

    09/11/2009 11:18:35 AM PDT · by neverdem · 10 replies · 607+ views
    Chemistry World ^ | 09 September 2009 | Lewis Brindley
    American chemists have made molecular 'daisy-chains' containing threaded rings that can be pulled taut or slackened by chemical stimuli. The polymers are a step towards making materials that stretch or contract on demand, and show great potential for applications such as actuators in nanomachinery or designing artificial muscles. 'Artificial muscle tissue is still a long way off, but we are starting to demonstrate the kind of systems where it could be possible,' says Robert Grubbs, who led the work at the California Institute of Technology, US. Grubbs won the Nobel Prize in Chemistry in 2005 for his work on olefin metathesis reactions, which allow carbon-carbon...
  • New nanoboxes take shape

    08/21/2009 8:53:41 AM PDT · by neverdem · 13 replies · 748+ views
    Chemistry World ^ | 20 August 2009 | Lewis Brindley
    USresearchers have made nano-sized boxes from nickel and tin - marking the first time that patterned 3D structures have been built on the nanoscale. The boxes and fabrication process could have great potential for making interesting nanostructures, for applications ranging from electronics to drug delivery.'I'm interested in miniaturising the world,' says David Gracias, who led the research at Johns Hopkins University in Baltimore, US. 'We have a lot of nanotechnology techniques that allow us to build very well in 2D - but building in 3D is more difficult.'The cubes resemble tiny dice around 100nm in size - patterned on each side with the university initials,...
  • New flagship journal Chemical Science announced

    08/19/2009 9:08:39 AM PDT · by neverdem · 5 replies · 390+ views
    RSC Publishing ^ | 17 August 2009 | NA
    Researchers will soon have a new dedicated home for presenting findings of exceptional significance from across the chemical sciences. Announcing the launch of Chemical Science at the ACS Fall 2009 National Meeting in Washington, Editorial Director Dr James Milne described this new venture as a milestone in the development of the RSC publishing portfolio. "During recent years, RSC journals have attracted significant growth in submissions, while journal Impact Factors have increased to now lead the field." Dr Milne continued: "the launch of Chemical Science, with Professor MacMillan as Editor-in-Chief, will truly complement RSC Publishing's world renowned communications and review flagship titles, and...
  • Crystals grown in a flash - A nanopulse of laser light is enough to trigger crystallization.

    08/08/2009 3:15:28 PM PDT · by neverdem · 9 replies · 945+ views
    Nature News ^ | 5 August 2009 | Mico Tatalovic
    This message, made up of tiny crystals suspended in a gel, was created using a series of laser pulses scanned through a template.A. Alexander / U. Edinburgh A technique that creates crystals on demand using laser pulses could make it easier to prepare the high-quality crystals needed to study protein structure.Chemists and biologists need crystals of proteins and other chemicals to analyse their atomic structure using X-rays, while many industrial processes rely on triggering crystal formation at precisely the right time and place during the production of drugs and other useful compounds.Yet "crystallization still remains largely a black art," says...
  • Smallest acid droplet formed

    06/24/2009 9:10:06 AM PDT · by neverdem · 9 replies · 750+ views
    Chemistry World ^ | 23 June 2009 | James Urquhart
    Scientists in Germany have observed a single molecule of HCl dissociating into its component ions in water - and have discovered that just four water molecules are needed for complete dissociation of the acid. The team say that their findings, made under ultracold conditions, should help scientists understand nanoscale chemical transformations at very low temperatures, including those occurring in stratospheric clouds and interstellar media. Previous studies into the dissociation mechanism of the strong acid HCl at ultracold temperatures had left a puzzle. Normally, such reactions require thermal energy, but at ultracold temperatures this thermal energy is not available. Now, Martina Havenith and...
  • ChemSpider finds new home

    06/23/2009 12:40:04 AM PDT · by neverdem · 346+ views
    Chemistry World ^ | 12 May 2009 | Phillip Broadwith
    ChemSpider, the open-access online database of structure-searchable chemical information, has found a new home with the UK's Royal Society of Chemistry. The move is hoped to enable ChemSpider to expand in scope and become a primary resource for online chemistry data.The acquisition of ChemSpider builds on an existing partnership between the two organisations, which last year saw the launch of a web-based resolver for the IUPAC's International Chemical Identifier (InChI) and its more streamlined cousin, the InChIKey, which allow chemical structures to be associated with strings of text. Graphical representations of chemical structures, while a valuable means of communication between human chemists,...
  • Nanoparticles make 'self-erasing' images

    06/19/2009 11:45:52 PM PDT · by neverdem · 8 replies · 576+ views
    Chemistry World ^ | 19 June 2009 | Jon Cartwright
    Materials displaying 'self-erasing' colour images have been created by chemists in the US, who have studied how certain nanoparticles can assemble and disassemble themselves under different wavelengths of light.The materials, which are printed with ultraviolet (UV) light and erased with visible light, could one day be used for self-expiring bus tickets or for carrying secret messages.'Self-erasing papers are important for time-sensitive materials and secure communications,' said study leader Bartosz Grzybowski of Northwestern University in Evanston, Illinois. 'On the fundamental level, what we describe is also a very different way of looking at the concept of information storage. We're not using traditional coloured inks per se,...
  • Turning wood into bone: peg-leg science

    06/17/2009 7:36:57 AM PDT · by neverdem · 10 replies · 558+ views
    Royal Society of Chemistry ^ | 16 June 2009 | NA
    Pirates can now trade in their peg-legs for real legs as scientists transform wood into bone.In a Royal Society of Chemistry journal Italian chemists show that ordinary wood can be turned into bone suitable for repairing damaged limbs.It brings a whole new meaning to the term "tree surgery".The microstructure of the wood is the perfect natural template for making bone as it allows growth of blood vessels and tissues, Anna Tampieri and colleagues report in the Journal of Materials Chemistry.By treating wood with a fairly simple set of chemical processes, the natural structure of the wood is retained.The wood is...
  • Meteorite sheds light on birth of the solar system

    06/16/2009 12:35:35 AM PDT · by neverdem · 3 replies · 529+ views
    Chemistry World ^ | 15 June 2009 | James Urquhart
    French and Italian scientists have analysed a meteorite and discovered that it contains a unique and primordial rock fragment that is thought to have remained largely unaltered since the solar system formed around 4.6 billion years ago. The scientists believe the xenolith, which shows unprecedented isotopic variations of nitrogen, may offer insight into the solar system's formation and say it poses serious problems for current models of light element isotopic fractionation.  Light element isotopic ratios are the result of formation mechanisms and particular physical and chemical conditions. Understanding them can therefore help determine whether extraterrestrial materials formed in the solar nebula...
  • DNA-like Molecule Replicates Without Help

    06/13/2009 1:07:46 PM PDT · by neverdem · 95 replies · 1,897+ views
    ScienceNOW Daily News ^ | 11 June 2009 | Robert F. Service
    Enlarge ImagePre-RNA? Hybrids between proteins and nucleic acids may have helped genetic molecules evolve.Credit: Science/AAAS Researchers pondering the origin of life have long struggled to crack the ultimate chicken-and-egg paradox. How did nucleic acids like DNA and RNA--which encode proteins--first form, when proteins are needed for their synthesis? Now, scientists report that they've cooked up molecular hybrids of proteins and nucleic acids that skirt the dreaded paradox. Although it's unknown whether such molecules existed prior to the emergence of life, they offer insight into a chemical pathway that might have helped life arise. DNA and RNA sport a backbone...
  • 'Electronic glue' makes nanocrystals connect

    06/12/2009 1:12:06 AM PDT · by neverdem · 1 replies · 421+ views
    Chemistry World ^ | 11 June 2009 | Lewis Brindley
    American chemists have developed an 'electronic glue' to link nanocrystals together - allowing groups of the crystals to be highly conductive. Since nanocrystals have unique optical and electrical properties, this research could provide some exciting new materials for use in light-emitting devices or solar cells.Nanocrystals are crystalline nanoparticles of metals ranging from cadmium to silicon, and can be grown with precisely controlled size and shape. But despite their exciting range of optical properties, they have found few applications so far. 'The problem is getting the crystals to 'talk' to one another,' says Maksym Kovalenko, lead author on the project at the...
  • New, Superheavy Element To Enter Periodic Table

    06/11/2009 1:59:57 PM PDT · by edpc · 8 replies · 907+ views
    Reuters via Yahoo News ^ | 11 June 2009 | Reuters
    BERLIN (Reuters) – A new, superheavy chemical element numbered 112 will soon be officially included in the periodic table, German researchers said. A team in the southwest German city of Darmstadt first produced 112 in 1996 by firing charged zinc atoms through a 120-meter-long particle accelerator to hit a lead target. "The new element is approximately 277 times heavier than hydrogen, making it the heaviest element in the periodic table," the scientists at the GSI Helmholtz Center for Heavy Ion Research said in a statement late on Wednesday.
  • New, Superheavy Element To Enter Periodic Table

    06/11/2009 1:59:57 PM PDT · by edpc · 49 replies · 1,751+ views
    Reuters via Yahoo News ^ | 11 June 2009 | Reuters
    BERLIN (Reuters) – A new, superheavy chemical element numbered 112 will soon be officially included in the periodic table, German researchers said. A team in the southwest German city of Darmstadt first produced 112 in 1996 by firing charged zinc atoms through a 120-meter-long particle accelerator to hit a lead target. "The new element is approximately 277 times heavier than hydrogen, making it the heaviest element in the periodic table," the scientists at the GSI Helmholtz Center for Heavy Ion Research said in a statement late on Wednesday.
  • 'Bilayer' graphene shows tunable bandgap

    06/11/2009 12:11:53 AM PDT · by neverdem · 16 replies · 2,691+ views
    Chemistry World ^ | 10 June 2009 | Jon Cartwright
    Since its discovery in 2004, the carbon-based material known as graphene has revealed a stream of attractive properties. Now, researchers in the US have shown that a two-layer version can deliver yet another: a wide, tunable bandgap. The discovery paves the way for new electronic devices, from lasers that change colour to electronic circuits that rearrange themselves. Graphene is a sheet of carbon just one atom thick, with a structure that resembles chicken wire. Single sheets of the material have proved to have record-breaking strength, high conductivity and high transparency. But recently some scientists have come to suspect that the most interesting...
  • Green method to kill termites

    06/08/2009 5:17:27 PM PDT · by neverdem · 13 replies · 1,020+ views
    Chemistry World ^ | 08 June 2009 | Jon Cartwright
    Researchers in the US have come up with a cheap, environmentally friendly way to kill termites and other pests. The method involves the applying a sugar derivative, which inhibits an anti-microbial protein normally secreted by the insects, thereby leaving them open to disease.Insects have efficient immune systems, although much of their workings are still unknown. Nevertheless, one aspect that is well-understood is the existence of proteins called pattern-recognition receptors, which can spot microbes that should not be present. Such receptors come under a class of 'gram-negative bacteria binding proteins', or GNBPs.Ram Sasisekharan of the Massachusetts Institute of Technology, together with colleagues...
  • Pd(III) catalysis insight

    06/07/2009 3:37:45 PM PDT · by neverdem · 4 replies · 459+ views
    Chemistry World ^ | 07 June 2009 | Phillip Broadwith
    The discovery of a bimetallic palladium(III) complex that can catalyse formation of carbon-heteroatom bonds adds a new facet to our understanding of the chemistry of one of the most widely-used metals in catalysis, say US chemists.Tobias Ritter and David Powers from Harvard University, Massachusetts, have shown for the first time that a palladium(III) complex is responsible for conversion of a C-H bond to a C-Cl bond. While such reactions were known before, the nature of the catalyst had not been studied in detail. 'This work was about analysis of how this kind of transformation works,' says Ritter, 'and we found this Pd(III)...
  • Thin the Air, Save the Biosphere?

    06/04/2009 10:56:47 PM PDT · by neverdem · 9 replies · 564+ views
    ScienceNOW Daily News ^ | 1 June 2009 | Phil Berardelli
    Enlarge ImageSomeday solution. Fiddling with atmospheric pressure may be one way to prevent a future apocalypse. Credit: Photos.com Sometime between 100 million and 1 billion years from now, Earth will have lost so much carbon dioxide from its atmosphere that plants and trees will literally begin suffocating, eventually taking all life with them. In a new study, researchers propose one way to delay this Armageddon: reduce the pressure of the atmosphere, effectively creating conditions where we all feel like we're living at high altitudes. Over the geologic history of Earth, CO2 levels in the atmosphere have been dropping. Today,...
  • The secret fuel that made the Spitfire supreme

    05/29/2009 5:03:39 PM PDT · by neverdem · 46 replies · 2,431+ views
    Royal Society of Chemistry ^ | 13 May 2009 | Brian Emsley
    In the year that sees the 70th anniversary of the outbreak of the Second World War, a previously untold story has emerged of how, through a "miracle" chemical breakthrough, Spitfire and Hurricane fighters gained the edge over German fighters to win the Battle of Britain. An American scientist and author has claimed that the famed pair of war-winning aeroplanes gained superior altitude, manoeuvrability and rate of climb by a revolutionary high-octane fuel supplied to Britain by the USA just in time for the battle. Books, documentaries, and movies have chronicled the brilliant contribution of UK designers and engineers behind the...
  • A good egg

    05/27/2009 10:35:49 PM PDT · by neverdem · 6 replies · 765+ views
    Royal Society of Chemistry ^ | 27 May 2009 | Anna Roffey
    UK and Dutch scientists have mimicked an ancient Chinese culinary technique of preserving eggs to study how proteins cause disease. Erika Eiser from the University of Cambridge and colleagues looked at how proteins in egg whites altered during this preservation process. The Chinese method involves wrapping raw eggs in an alkaline paste of lime, clay, salt, ash and tea and storing these so-called century eggs for several months. Eiser modified the method by incubating a boiled egg in a strong alkaline sodium hydroxide-salt solution for up to 26 days. Hard boiled egg whites become a transparent gel in an alkaline...
  • Function for green fluorescent protein - Biologists’ favorite glowing marker may play a role in...

    04/26/2009 11:37:22 PM PDT · by neverdem · 3 replies · 498+ views
    Science News ^ | April 26th, 2009 | Rachel Ehrenberg
    Biologists’ favorite glowing marker may play a role in cellular business Green fluorescent protein, the darling of cell biologists and biomedical researchers, may do more than give off light. When the protein fluoresces — allowing researchers to see where cells and proteins boldly glow in petri dishes and living organisms — it also gives up electrons, a team reports online April 26 in Nature Chemical Biology. The research suggests a possible new function of the protein; its normal role has remained a puzzle despite its widespread use in laboratories. “This is a totally unexpected twist,” comments Mikhail Matz of the...
  • Concrete Is Remixed With Environment in Mind

    03/31/2009 9:46:20 PM PDT · by neverdem · 11 replies · 816+ views
    NY Times ^ | March 31, 2009 | HENRY FOUNTAIN
    Soaring above the Mississippi River just east of downtown Minneapolis is one remarkable concrete job. There on Interstate 35W, the St. Anthony Falls Bridge carries 10 lanes of traffic on box girders borne by massive arching piers, which are supported, in turn, by footings and deep pilings. The bridge, built to replace one that collapsed in 2007, killing 13 people, is constructed almost entirely of concrete embedded with steel reinforcing bars, or rebar. But it is hardly a monolithic structure: the components are made from different concrete mixes, the recipes tweaked, as a chef would, for specific strength and durability...
  • Breakthrough in cheaper electronics

    03/27/2009 9:22:22 AM PDT · by WesternCulture · 14 replies · 1,277+ views
    www.sweden.se ^ | 03/27/2009 | www.sweden.se
    Flexible display screens and cheap solar cells can become a reality through research and development in organic electronics. Physicists at Umeå University in northern Sweden have developed a simple method for producing cheap electronic components, writes Cellular-News.
  • U-M researcher's idea jells into potential new disease-detection method

    03/25/2009 11:33:11 PM PDT · by neverdem · 2 replies · 364+ views
    Relying on principles similar to those that cause Jell-O to congeal into that familiar, wiggly treat, University of Michigan researchers are devising a new method of detecting nitric oxide in exhaled breath. Because elevated concentrations of nitric oxide in breath are a telltale sign of many diseases, including lung cancer and tuberculosis, this development could prove useful in diagnosing illness and monitoring the effects of treatment. Assistant professor of chemistry Anne McNeil and graduate student Jing Chen will discuss the work at the spring meeting of the American Chemical Society in Salt Lake City, Utah. McNeil and Chen work with...
  • A Polymer Coating That Can Heal Itself Thanks to UV Light

    03/22/2009 8:11:33 PM PDT · by neverdem · 12 replies · 762+ views
    NY Times ^ | March 17, 2009 | HENRY FOUNTAIN
    Skin is spectacular stuff. Nick it with a razor or scrape it on the sidewalk, and it heals itself quickly. Synthetic materials are another story, although it’s not for lack of effort on the part of scientists. Chemists have tried for years to develop self-healing polymer coatings for use on cars, furniture and other objects. Recent efforts use microspheres containing bonding chemicals. These tiny capsules are embedded in the coating. When a crack or scratch occurs, the spheres break and the chemicals flow into the void, patching it. Biswajit Ghosh and Marek W. Urban of the University of Southern Mississippi...
  • New method for detecting explosives

    03/16/2009 1:22:08 AM PDT · by neverdem · 2 replies · 453+ views
    A group of researchers in Tennessee and Denmark has discovered a way to sensitively detect explosives based on the physical properties of their vapors. Their technology, which is currently being developed into prototype devices for field testing, is described in the latest issue of the journal Review of Scientific Instruments, which is published by the American Institute of Physics. "Certain classes of explosives have unique thermal characteristics that help to identify explosive vapors in presence of other vapors," says Thomas Thundat, a researcher at Oak Ridge National Laboratory (ORNL) and the University of Tennessee who conducted the research with his...
  • HR 875 The food police

    03/09/2009 7:32:17 AM PDT · by modhom · 76 replies · 3,128+ views
    HR 875 The food police, criminalizing organic farming and the backyard gardener, and violation of the 10th amendment This bill is sitting in committee and I am not sure when it is going to hit the floor. One thing I do know is that very few of the Representatives have read it. As usual they will vote on this based on what someone else is saying. Urge your members to read the legislation and ask for opposition to this devastating legislation. Devastating for everyday folks but great for factory farming ops like Monsanto, ADM, Sodexo and Tyson to name a...
  • Pill creator regrets population decline

    02/06/2009 9:45:49 AM PST · by Between the Lines · 41 replies · 1,693+ views
    Baptist Press News ^ | Feb 5, 2009 | Erin Roach
    NASHVILLE, Tenn. (BP)--A chemist who led to the invention of the birth control pill says he regrets the demographic catastrophe that has resulted from people using the contraceptive device to separate reproduction from sexuality. Carl Djerassi, the 85-year-old Austrian chemist who was one of three whose formulation of synthetic hormones paved the way for the pill, wrote an opinion piece in the Austrian newspaper Der Standard lamenting the way the pill has been used. Austria's population now includes more people over age 65 than under 15, and Djerassi said the country soon will face an "impossible situation" as the working...