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Keyword: chemistry

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  • Kevlar Inventor Stephanie Kwolek Dead at 90

    06/20/2014 12:05:59 PM PDT · by Kartographer · 4 replies
    GMA via Yahho News ^ | 6/20/14 | ALYSSA NEWCOMB
    As one of the few pioneering female chemists in the 1960s, Stephanie Kwolek invented the flexible, tougher than steel fibers that were used to create life-saving body armor for law enforcement and soldiers. Kwolek died this week at the age of 90, her co-workers at DuPont, the chemical company where Kwolek worked, confirmed to ABC News. "She leaves a wonderful legacy of thousands of lives saved and countless injuries prevented by products made possible by her discovery," DuPont CEO Ellen Kullman said in a statement.
  • New type of microengine using internal combustion of hydrogen and oxygen

    03/13/2014 11:23:48 AM PDT · by Kevmo · 5 replies
    MESA+ Institute for Nanotechnology, University of Twente, ^ | March 2014 | Vitaly B. Svetovoy*1,2, Remco G. P. Sanders1, Kechun Ma1 & Miko C. Elwenspoek1,3
    New type of microengine using internal combustion of hydrogen and oxygen Vitaly B. Svetovoy*1,2, Remco G. P. Sanders1, Kechun Ma1 & Miko C. Elwenspoek1,3 MESA+ Institute for Nanotechnology, University of Twente, PO 217, 7500 AE Enschede, The Netherlands (v.svetovoy@utwente.nl) 2Institute of Physics and Technology, Yaroslavl Branch, Russian Academy of Sciences, 150007,Yaroslavl, Russia 3FRIAS, University of Freiburg, 79104 Freiburg, Germany Microsystems become part of everyday life but their application is restricted by lack of strong and fast motors (actuators) converting energy into motion. For example, widespread internal combustion engines cannot be scaled down because combustion reactions are quenched in a small...
  • Mass spec backpack for chemical analysis on the go

    03/05/2014 2:55:52 PM PST · by neverdem · 7 replies
    Chemistry World ^ | 4 March 2014 | Emma Stoye
    The Mini S analyser may look like something out of Ghostbusters but it is designed for use in hazardous locations © ACSThe latest gadget to come out of the labs of Purdue University in the US may look like the fictional ‘proton pack’ from Ghostbusters, but it’s actually a portable mass spectrometer that can be carried around on the user’s back. While it can’t capture an unruly poltergeist, the team who developed it say it could be a useful tool for environmental and forensic monitoring, and have shown it can identify chemical weapons, drugs and explosives.Most mass spectrometry happens in...
  • Fuel cells put in the frame with catalysts that need far less platinum

    03/01/2014 10:05:03 AM PST · by neverdem · 6 replies
    Chemistry World ^ | 28 February 2014 | Tim Wogan
    The platinum nanoframes have 22 times the sepcific catalytic activity of standard electrodes © Science/AAASUS scientists have created an exceptional fuel cell catalyst that contains far less platinum – conventional catalysts need 36 times more platinum to hit the same levels of activity. The manufacturing process, which was discovered by accident, uses simple techniques that the researchers believe can be easily scaled-up. The work could help to make fuel cells economically viable for applications such as cars as the precious metal makes up much of the cost of the cell.Fuel cells react hydrogen with oxygen to produce water, using the...
  • Will Courts Lift Veil of Secrecy Around Lethal Injections?

    02/27/2014 10:45:17 PM PST · by CorporateStepsister · 15 replies
    NBC News ^ | February 28, 2014 | By Pete Williams
    Despite growing controversy over the use of anonymous pharmacies for lethal injections, the U.S. Supreme Court has thus far declined to block any executions based on 11th-hour appeals challenging the drug connections. That includes the case of Michael Taylor, a convicted rapist and murderer who was put to death at 12:10 a.m. Wednesday in Missouri after a furious legal battle that stretched well into the night. It's worth nothing, however, that three high court justices wanted to block Taylor's execution and cited the words of an appeals judge who said so little was known about the source of the deadly...
  • Chemistry set Kickstarter looks to recapture the wonder of days gone by

    11/23/2013 8:47:19 AM PST · by AdmSmith · 100 replies
    Geek.com ^ | Nov 14, 2013 | Graham Templeton
    The phrase “chemistry set” is embedded in the collective unconscious, but try to actually call one to mind. What does a chemistry set look like? What does it include? What can you do with it? If you’re anything close to being a millennial, you probably have only vague answers to these questions. If you’re a little older, however, you probably remember one of the classic sets that is responsible for our powerful (if nonspecific) connection to the concept of a chemistry set. Chief among these, in many people’s eyes, is the Gilbert Chemistry Set, which inspired untold numbers of young...
  • Scientists Create Terminator 2-Like Material That Heals Itself

    09/16/2013 7:33:55 PM PDT · by DogByte6RER · 20 replies
    DVICE ^ | Monday, September 16, 2013 | Robin Burks
    Scientists Create Terminator 2-Like Material That Heals Itself ... (Or, How I Learned to Stop Worrying and Love the Technological Singularity) In Terminator 2, the T-1000 android was blown nearly in two, only to mend itself by pulling its mercury-like substance back together. Scientists have long been working on creating a polymer to do the same thing, but previous research always required an external factor (like temperature or pressure) to work. Scientists at the CIDETEC Center for Electrochemical Technologies in Spain succeeded where other scientists have failed: they've invented a plastic polymer that will heal itself all on its own....
  • Contains Loud Bangs - Periodic Table of Videos {video only]

    08/28/2013 5:34:10 PM PDT · by servo1969 · 4 replies
    YouTube.com ^ | 8-28-2013 | Periodic Videos
    It's detonation vs deflagration. More slow motion at http://bit.ly/chemslomo More chemistry at http://www.periodicvideos.com/Follow us on Facebook at http://www.facebook.com/periodicvideosAnd on Twitter at http://twitter.com/periodicvideosFrom the School of Chemistry at The University of Nottingham: http://www.nottingham.ac.uk/chemistry... Periodic Videos films are by video journalist Brady Haran: http://www.bradyharan.com/ Brady's other channels include:http://www.youtube.com/sixtysymbols (Physics and astronomy)http://www.youtube.com/numberphile (Numbers and maths)http://www.youtube.com/DeepSkyVideos (Space stuff)http://www.youtube.com/nottinghamscience (Science and behind the scenes)http://www.youtube.com/foodskey (Food science)http://www.youtube.com/BackstageScience (Big science facilities)http://www.youtube.com/favscientist (Favourite scientists)http://www.youtube.com/bibledex (Academic look at the Bible)http://www.youtube.com/wordsoftheworld (Modern language and culture)http://www.youtube.com/PhilosophyFile (Philosophy stuff) Thanks to Destin from smartereveryday for helping us out!!!
  • Ball lightning captured in the lab

    08/22/2013 8:20:43 PM PDT · by neverdem · 19 replies
    Chemistry World ^ | 21 August 2013 | James Urquhart
    US researchers have developed a new way to create glowing orbs of plasma similar to ball lightning in the lab, allowing them to study their chemical and physical properties. The work could help scientists unravel the mysteries of this very rare natural phenomenon.Ball lightning has been known for millennia, but its rarity and short lived nature – typically lasting between 1 and 10 seconds – has prevented it from being studied and understood. In recent years, however, lab experiments that mimic ball lightning have been developed.One method involves a glowing discharge produced above an aqueous electrolyte solution. However, high...
  • Upsalite: Scientists make 'impossible material'... by accident

    08/15/2013 8:47:20 AM PDT · by neverdem · 49 replies
    Phys.org ^ | August 13th, 2013 | NA
    Enlarge Credit: Simon Ydhag, Uppsala University Credit: Simon Ydhag, Uppsala UniversityResearchers in Uppsala, Sweden accidentally left a reaction running over the weekend and ended up resolving a century-old chemistry problem. Their work has led to the development of a new material, dubbed Upsalite, with remarkable water-binding properties. Upsalite promises to find applications in everything from humidity control at home to chemical manufacturing in industry.Maria Strřmme and colleagues at Uppsala University, whose work appears in the journal PLOS ONE, have modified a procedure dating back to 1908 to make a powdered and dry form of magnesium carbonate (MgCO3). The reaction...
  • Synthetic Cactus Needles Could Clean Up Oil Spills

    08/12/2013 9:36:59 AM PDT · by neverdem · 10 replies
    ScienceNOW ^ | 2013-08-06 | Jennifer Wong
    Leica DM4000M microscopySuper sucker. Copper needles could help remove oil from the ocean. Researchers looking for a better way to clean up oil spills are taking a cue from the humble cactus. A new study shows that synthetic needles based on those of the desert plant can take up oil droplets from the ocean much as the cactus takes up water from the air.Cactus needles have a curious effect on water. When tiny water droplets in the air land on them, the needlesÂ’ conical shape distorts them, nudging them into a clamlike shape. Because water droplets like to be circular,...
  • Press P to print

    07/23/2013 11:17:17 PM PDT · by neverdem · 10 replies
    Chemistry World ^ | 25 June 2013 | Katharine Sanderson
    The use of 3D printers to create lab equipment, deliver reagents and even build biomaterials is on the rise. Katharine Sanderson installs drivers and prints away © Frank WojciechowskiThe latest piece of cool technology at the top of every self-confessed geek’s wish list is quite likely to be a 3D printer. Who wouldn’t want the wherewithal to print a range of gadgets on a whim, from plastic toys to a spare pair of glasses or even pizza? And now seems like the perfect time to splash out on your own 3D printer: companies like MakerBot are selling 3D printers...
  • Two-photon microscopy: New research may help drastically reduce cost of powerful microscope...

    06/29/2013 12:04:25 PM PDT · by neverdem · 4 replies
    Phys.org ^ | Apr 21, 2013 | NA
    Two-photon microscopy: New research may help drastically reduce cost of powerful microscope technique Enlarge The same section of a mouse brain imaged with a femtosecond laser (above) and a much weaker laser but the new dye (below). (Phys.org) —A dye-based imaging technique known as two-photon microscopy can produce pictures of active neural structures in much finer detail than functional magnetic resonance imaging, or fMRI, but it requires powerful and expensive lasers. Now, a research team at the University of Pennsylvania has developed a new kind of dye that could reduce the cost of the technique by several orders of magnitude....
  • Ionic liquid formulation improves herbicide

    06/28/2013 9:52:19 PM PDT · by neverdem · 6 replies
    Chemistry World ^ | 28 June 2013 | Helen Potter
    Scientists in Poland and the US have reformulated the herbicide dicamba to reduce its environmental impact.© Shutterstock The use of chemicals in agriculture is widespread, however, there are increasing concerns about their other environmental effects. Dicamba, used to control broadleaf weeds in grain fields and grasslands, is known to enter the environment via water runoff and evaporation following its application.In an attempt to reduce its volatility, a team led by Robin Rogers, from the University of Alabama, and Juliusz Pernak, from Poznan University of Technology, has formulated dicamba as an ionic liquid. Ionic liquids are liquid salts, consisting of a...
  • Artificial 'superatoms' for a new periodic table

    06/09/2013 12:09:23 AM PDT · by neverdem · 20 replies
    Chemistry World ^ | 7 June 2013 | Simon Hadlington
    'Superatoms' can be used to make ionic-esque lattices using C60 (black) and metal chalcogenides © Science/AAASCould a new periodic table be on the horizon, populated not by conventional elements but by new ‘superatoms’ designed in the lab? This is the intriguing implication of new work by US chemists, who have made structural analogues of simple ionic compounds such as sodium chloride and cadmium iodide by interacting large molecular clusters instead of individual atoms.The new compounds have unexpected electronic and magnetic properties, opening the prospect for the design of bespoke solid state materials whose properties can be tuned by the...
  • Haemoglobin mimic mops up cyanide

    06/04/2013 11:31:53 PM PDT · by neverdem · 10 replies
    Chemistry World ^ | 3 June 2013 | Emma Stoye
    The supramolecule mimics the structure of haemoglobin (below) with iron(III) at it's centre © Wiley-VCHJapanese researchers have created a supramolecule that binds to cyanide ions in a similar way to the blood protein haemoglobin. This could pave the way for faster, more effective cyanide antidotes.The effects of cyanide poisoning are well known to fans of spy stories and murder mysteries. It rapidly shuts down respiration, and high doses can kill in a matter of minutes. Every year, industrial accidents result in several cases of cyanide poisoning, and there is growing concern that it could be used in a terrorist...
  • Sugar solution to toxic gold recovery

    05/21/2013 1:42:33 PM PDT · by neverdem · 7 replies
    Chemistry World ^ | 15 May 2013 | James Urquhart
    The specific self-assembly between α-cyclodextrin and KAuBr4 leads to the precipitation of nanowires © Dennis CaoUS researchers have discovered a way to selectively isolate and recover gold from raw materials, including alloys, using a simple sugar derived from corn starch. The work could offer a greener and cheaper alternative to conventional processes, which use cyanide and often result in environmental contamination.Gold is typically recovered from mined ore and waste materials, including electronic waste, using highly poisonous cyanide to convert gold into a water-soluble coordination complex through a process known as leaching. But while effective, this process poses a risk...
  • Mineral dust plays key role in cloud formation and chemistry

    05/10/2013 11:29:47 PM PDT · by neverdem · 11 replies
    Chemistry World ^ | 9 May 2013 | Simon Hadlington
    Scientists flew a plane into high up cirrus clouds and used a sampler that resembled a hair dryer to examine cloud formation © Karl FroydMineral dust that swirls up into the atmosphere from Earth’s surface plays a far more important role in both cloud formation and cloud chemistry than was previously realised. The findings will feed into models of cloud formation and chemistry to help produce more accurate assessments of the role of clouds in climate change.Relatively little is understood about the formation of cirrus clouds, wispy ‘horsetails’ that are made of ice crystals and form at extremely high altitudes...
  • Understanding defects in graphene

    05/10/2013 10:09:26 PM PDT · by neverdem · 6 replies
    Chemistry World ^ | 9 May 2013 | Emma Stoye
    The products of thermally exfoliating graphite oxide to make graphene are much more complex than previously thought, new research shows. The volatile compounds formed vary with reaction conditions, and may influence the graphene’s structure.The most common way to prepare graphene is by thermally reducing – or ‘exfoliating’ – graphite oxide. But the graphene produced often contains defects and lacks the perfect honeycomb structure. One explanation is that these defects may be the result of organic by-products forming and escaping as gases during the reaction.‘It has been commonly believed that the only gaseous products of graphite oxide exfoliation are water, carbon...
  • Device Sniffs Out Black Powder Explosives

    05/04/2013 5:21:22 PM PDT · by neverdem · 12 replies
    ScienceNOW ^ | 3 May 2013 | Sam Lemonick
    Enlarge Image Deadly powder. New technology could help bomb-sniffing devices spot black powder. Credit: Lord Mountbatten/Wikimedia Commons The Boston marathon bombers Tamerlan and Dzhokhar Tsarnaev reportedly purchased several pounds of black powder explosive before the bombing. Used in fireworks and bullets, the explosive substance is both deadly and widely available. It's also very hard to detect. Now, researchers have modified one bomb-sniffing device to accurately spot very small amounts of black powder, an advance that could make us safer from future attacks. Invented in China as early as the 7th century, black powder is a mixture of charcoal, sulfur,...
  • Felony Science - Making stuff explode is a seductive way to become a scientist.

    05/04/2013 4:32:31 PM PDT · by neverdem · 39 replies
    Slate ^ | May 3, 2013 | Michelle M. Francl
    Sixteen-year-old Kiera Wilmot’s curiosity was apparently piqued when a friend told her that if you mixed hydrochloric acid and aluminum, an exciting reaction happened. So she did what countless amateur chemists before her have done: She went ahead and tried it. She mixed toilet bowl cleaner—essentially colored hydrochloric acid—and balls of aluminum foil in a small water bottle. The top of the bottle blew off with a satisfying bang, and there was even a puff of smoke. Unfortunately, Kiera got more excitement than she bargained for. When a teenage Oliver Sacks experimented with explosive reactions of aluminum in his basement...
  • (Florida) Teen Girl Expelled, Charged With a Felony After Science Experiment Goes Awry

    05/02/2013 9:48:34 AM PDT · by Zakeet · 66 replies
    Yahoo News ^ | May 2, 2013
    Science experiments don't always go the way they are intended. This, a 16-year-old Florida teenager knows all too well. This week, Kiera Wilmot went to school and mixed some household chemicals in a tiny 8-ounce water bottle. It looked like a simple chemistry project but then the top popped off when a small explosion occurred. Wilmot, who is in good standing as a student, said it was an accident. The Bartow High School principal told a local television station that the teen made a “bad choice” and called her a a good kid who has never previously been in trouble....
  • Colour changing nanoparticles inspired by deep sea denizens

    04/24/2013 7:41:26 PM PDT · by neverdem · 3 replies
    Chemistry World ^ | 24 April 2013 | James Urquhart
    Cuttlefishes' camouflage skills have many admirersInspired by the camouflage abilities of marine organisms, such as the cuttlefish, US researchers have created striped ellipsoid particles using controlled self-assembly of diblock copolymers. By swelling and rotating the particles their colour can be changed, which could lead to a variety of optical applications including computer displays and better camouflage.Cuttlefish blend into their environment because their skin has cells containing striped structures. These structures have a layer of pigmented sacs called chromatophores and a layer of reflecting plates called iridophores. By contracting and relaxing muscles attached to chromatophores they can control the amount of...
  • Court convicts ex-Aptuit researcher over drug data

    03/22/2013 3:34:20 PM PDT · by neverdem · 3 replies
    Chemistry World ^ | 21 March 2013 | Andy Extance
    A UK court has found a man guilty of illegally altering pre-clinical trial data. Steven Eaton, a former employee at drug discovery and development firm Aptuit’s Riccarton site in Scotland, produced flawed data over six years. This is the first case of someone being successfully prosecuted under current Good Laboratory Practice (GLP) Regulations. A spokesman for the UK’s Medicines and Healthcare products Regulatory Agency (MHRA) underlines how unusual this is. ‘This type of activity is very rare and, based on the results of a significant number of inspections, we have no evidence to indicate the problem is widespread,’ he tells...
  • A biomass bonanza

    03/18/2013 7:43:05 AM PDT · by neverdem · 1 replies
    Chemistry World ^ | 21 February 2013 | Emma Davies
    Companies have put biofuels on the back burner to aim for higher margin chemicals, as Emma Davies finds out Tom Welton gives the wooden desk in his office a sharp rap with his knuckles. ‘That’s the sound of lignin,’ he says, grinning. ‘Have you seen its structure? It’s beautiful, full of aromatics, lovely compounds that make you think: I could make something useful from this.’Welton, who is head of chemistry at Imperial College London, UK, views lignin – the ‘really hard stuff’ that protects plants from biological attack – as a valuable source of renewable speciality chemicals. His group has...
  • Deadly mushroom chemistry

    03/17/2013 7:22:25 PM PDT · by neverdem · 61 replies
    Chemistry World ^ | 13 March 2013 | Emma Shiells
    Can you tell the difference between a tasty paddy straw mushroom and a toxic death cap? Emma Shiells talks to the experts about the potentially deadly chemistry hidden in those gills Death cap mushrooms are, as the name suggests, deadly © Science Photo LibraryOn a damp and drizzly autumnal morning you may think there are better places to be than foraging in the undergrowth of an orchard, but amateur mushroom hunters are sure to disagree with you. Martin Newcombe, an ecologist and fungi enthusiast, is one of those hooked.‘The fact that fungi can grow so quickly makes them fascinating,’ says...
  • Recycling rare earth elements using ionic liquids

    03/17/2013 4:07:52 PM PDT · by neverdem · 8 replies
    Chemistry World ^ | 15 March 2013 | Ian Farrell
    © Science Photo LibraryRecycling old magnets, so that rare-earth metals can be re-used, could help to solve an urgent raw material supply problem in the electronics industry. Researchers from the University of Leuven, Belgium, have used ionic liquids to separate neodymium and samarium from transition metals like iron, manganese and cobalt – all elements that are used in the construction of permanent rare-earth magnets, which are found in electronic devices ranging from hard drives to air conditioners and wind turbines.‘The process involves the liquid-liquid extraction of rare-earth metals from the other elements present in neodymium-iron-boron and samarium-cobalt magnets,’ explains Koen...
  • Chemical velcro sticks underwater

    02/14/2013 5:32:27 PM PST · by neverdem · 4 replies
    Chemistry World ^ | 14 February 2013 | James Urquhart
    Ferrocene 'hooks' (yellow) fit into cucurbituril 'loops' (grey) to hold the two sheets of silicon together © Wiley-VCHSouth Korean scientists have developed a chemical velcro that shows promise as a strong and reversible underwater adhesive. The team suggests it could have many applications that require controllable adhesion in aqueous environments.Previous efforts to create underwater adhesives have mainly focused on biomimetic catechol-based polymers that are secreted by marine organisms, including mussels. However, these require curing agents and work by covalent crosslinking, which results in permanent adhesion.Now, Kimoon Kim and colleagues at Pohang University of Science and Technology, have developed a reversible...
  • Nuclear detectives sniff out North Korea - Radioisotopes may provide key details on nuclear test.

    02/13/2013 2:50:15 AM PST · by neverdem · 4 replies
    Nature News ^ | 12 February 2013 | Geoff Brumfiel
    With this morning's announcement by North Korea that it has conducted its third nuclear test, experts are closely watching a network of seismic monitoring stations for hints of what sort of test it was. Ratios of radioisotopes could help to verify the explosion and perhaps even provide clues about the type of device detonated — but only if the radioactive gases can be identified before they decay. Seismic stations detected the underground blast at 9:57 a.m. local time. The data, from the US Geological Survey and the Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO), showed a sudden, strong...
  • Richard III body found under Leicester car park

    02/07/2013 4:14:55 PM PST · by neverdem · 17 replies
    Chemistry World ^ | 4 February 2013 | Patrick Walter
    The skeleton showing curvature of the spine (scoliosis) consistent with historical accounts © University of LeicesterThe mortal remains of England's warrior king Richard III have been found, bringing to a close a mystery that has puzzled scholars for centuries. Analytical tests on a skeleton found under a Leicester car park have confirmed the last resting place of the final king in the Plantagenet line.The announcement comes after months of feverish speculation. In September 2012, the University of Leicester announced that its detective work combing ancient texts had led its team to conclude that the King was buried at Greyfriars Monastery...
  • Mopping up oil spills with marshmallows (flexible aerogels)

    01/28/2013 8:46:48 PM PST · by neverdem · 10 replies
    Chemistry World ^ | 22 January 2013 | James Urquhart
    Japanese researchers have developed a marshmallow-like material that can mop up hydrocarbons like a sponge and can then be wrung out.1 The work could one day lead to a cheap and simple solution for cleaning up large oil spills such as one that decimated the Gulf of Mexico in 2010. Although similar materials have been made before, they have had shortcomings for large-scale clean-up operations including a lack of hydrophobicity, difficult or expensive production methods and an inability to be reused. Now, researchers at Kyoto University have made marshmallow-like macroporous gels that are free from all of these drawbacks.The...
  • Chemical climate proxies

    01/23/2013 10:04:25 PM PST · by neverdem · 8 replies
    Chemistry World ^ | 23 January 2013 | Jon Evans
    With the climate change debate as heated as ever, how do scientists reconstruct what the weather was like in the past? Jon Evans looks at the detective chemistry behind such environmental forensic work © Pete Bucktrout/British Antarctic SurveyThe Earth is not particularly good at keeping records, especially of its past climate. Like those of a disorganised businessman, its climate records are difficult to find, hard to interpret and often contradictory. But like diligent auditors, scientists are making great efforts to get to the bottom of the Earth’s disorganised records, both to understand how the Earth’s climate behaved in the past...
  • The Marvelous Marie Curie

    01/18/2013 12:29:18 AM PST · by neverdem · 23 replies
    The New Atlantis ^ | Fall 2012 | Algis Valiunas
    Marie Curie (1867–1934) is not only the most important woman scientist ever; she is arguably the most important scientist all told since Darwin. Einstein? In theoretical brilliance he outshone her — but her breakthroughs, by Einstein’s own account, made his possible. She took part in the discovery of radioactivity, a term she coined; she identified it as an atomic property of certain elements. When scoffers challenged these discoveries, she meticulously determined the atomic weight of the radioactive element she had revealed to the world, radium, and thereby placed her work beyond serious doubt. Yet many male scientists of her day...
  • Cutting edge chemistry in 2012

    12/31/2012 5:49:22 PM PST · by neverdem · 9 replies
    Chemistry World ^ | 20 December 2012 | Laura Howes
    I’ve been expecting you Mr Bond This year saw more work probing the nature of bonding. In Germany, Holger Braunschweig of Julius-Maximillians University in Würzberg, found that reacting a bis(N-heterocyclic carbene)-stabilised tetrabromodiborane with sodium naphthalene gave diborene or diboryne compounds with the world’s first stable boron–boron triple bond.1 Although boron has been an obvious target for triple bond creation, up until now the element has been reluctant and had only formed a triple bond at a chilly 8K. The new work, at room temperature, is distinctly warmer. The world's first stable germanium–oxygen double was created © NPG And if...
  • Unlocking New Talents in Nature: Protein Engineers Create New Biocatalysts

    12/30/2012 1:17:16 PM PST · by neverdem · 5 replies
    ScienceDaily ^ | Dec. 20, 2012 | NA
    Protein engineers at the California Institute of Technology (Caltech) have tapped into a hidden talent of one of nature's most versatile catalysts. The enzyme cytochrome P450 is nature's premier oxidation catalyst -- a protein that typically promotes reactions that add oxygen atoms to other chemicals. Now the Caltech researchers have engineered new versions of the enzyme, unlocking its ability to drive a completely different and synthetically useful reaction that does not take place in nature. The new biocatalysts can be used to make natural products -- such as hormones, pheromones, and insecticides -- as well as pharmaceutical drugs, like antibiotics,...
  • Nanoparticle blast caught on film - Combustion could help to make minuscule matter.

    12/08/2012 9:09:00 PM PST · by neverdem · 4 replies
    NATURE NEWS ^ | 05 December 2012 | Eugenie Samuel Reich
    Explosive debut A droplet of xylene containing a tin compound is ignited, and then explodes to produce uniform nanoparticles (courtesy: Ch. Rosebrock & L. Mädler, Univ. Bremen). It was a pretty explosive premiere for a movie about a chemical reaction. A microscopic droplet drifted across the screen — almost in homage to the panning gun barrel of the James Bond movies — and then: bang! Scientists watching the scene last week at a meeting of the Materials Research Society (MRS) in Boston, Massachusetts, were gripped, because the death of the droplet was also an act of creation. Lutz Mädler, a...
  • New Chemical Reaction Could Explain How Stars Form, Evolve, and Eventually Die

    12/08/2012 8:44:00 PM PST · by neverdem · 16 replies
    ScienceDaily ^ | December 7, 2012 | NA
    University of North Dakota scientist Mark Hoffmann's version of Star Search goes a long way -- a very long way -- out into the universe. Hoffmann, a computational chemist, and his colleagues Tryve Helgaker, a well-known Norwegian scientist, and co-authors E.I. Tellgren and K. Lange, also working in Norway, have discovered a molecular-level interaction that science had puzzled over for decades but had never seen. That discovery, it turns out, may redefine how science views chemical compound formation. It also answers questions about what goes on in places like white dwarfs, the super dense cores of stars nearing the end...
  • We don’t need no intuition

    12/06/2012 1:38:10 AM PST · by neverdem · 2 replies
    Chemistry World ^ | 5 December 2012 | Neil Withers
    US scientists have developed a way to solve crystal structures that combines powerful computational methods with data from experiments or databases – but that does not require much human input. Previous computational methods to predict structures rarely use experimental data, take a long time and are limited to compounds with small unit cells. They also give structures that generally have lower symmetry than those which have been experimentally determined, suggesting that the answers may not be quite right.‘One of the dirty little secrets that people don’t generally talk about is that, with a lot of these methods, you always...
  • Make or break: the laws of motion

    11/30/2012 6:10:29 PM PST · by neverdem · 1 replies
    Chemistry World ^ | 28 November 2012 | Philip Ball
    Calling chemistry ‘molecular architecture’ is even more apt than it might seem. There was a time when architectural engineering was largely about getting buildings to stay up: to withstand the stresses and forces that act on them. But today’s architecture is responsive, mutable, adaptive and dynamic. Likewise, chemistry could appear in its first flush to be about making bonds that will last, but today’s chemistry is just as concerned with breaking as it is with making. The dynamic role of weak hydrogen bonding, for example, was illustrated with the discovery of DNA’s structure: to template replication and transcription, the molecule...
  • Self-Healing Plastic 'Skin' Points Way to New Prosthetics

    11/14/2012 9:33:54 PM PST · by neverdem · 10 replies
    ScienceNOW ^ | 11 November 2012 | Tim Wogan
    Enlarge Image Cutting edge. After it was divided with a scalpel, a new polymer was able to heal itself, restoring most of its mechanical and electrical properties in 15 seconds. Credit: Benjamin Tee and Chao Wang Human skin is a special material: It needs to be flexible, so that it doesn't crack every time a user clenches his fist. It needs to be sensitive to stimuli like touch and pressure—which are measured as electrical signals, so it needs to conduct electricity. Crucially, if it's to survive the wear and tear it's put through every day, it needs to be...
  • Helping good bacteria reach their target

    11/07/2012 11:39:17 AM PST · by neverdem · 4 replies
    Chemistry World ^ | 6 November 2012 | Elinor Hughes
    Most probiotic bacteria that are added to foods, such as yoghurt, to aid the digestive system are not reaching their intended target in the intestine. Instead, the majority are being destroyed in the stomach before they can do any good. Now, UK scientists have come up with a coating to overcome this problem.1Probiotic bacteria are added to food such as yoghurt drinks to aid the digestive system. © Shutterstock Probiotics are bacteria that naturally live in the small and large intestine. They provide health benefits by producing nutrients, compete with pathogenic bacteria for binding sites and stimulate the immune system....
  • Printing out new catalysts

    11/01/2012 11:17:39 PM PDT · by neverdem · 10 replies
    Chemistry World ^ | 1 November 2012 | Laura Howes
    An inkjet printer has been repurposed to create a huge library of potential catalysts. To make the technology work with inorganic reagents that have different chemistries, a collaboration between chemists at the University of California, Santa Barbara, US, and Zhejiang University in China, has created special 'inks' made of colloidal nanoparticles of different metal precursors and polymers that direct the formation of the resulting nanoparticle structures.Different nanoparticle inks can then be loaded into seperate ink containers and combined in precise amounts, resulting in up to 1 million new formulations an hour, containing up to eight different components. That resulting...
  • Molecular muscle machines bulk up

    10/26/2012 9:17:48 PM PDT · by neverdem · 4 replies
    Chemistry World ^ | 26 October 2012 | Andy Extance
    French researchers have made the longest molecular machines that can be shrunk on demand in a collective motion that emulate muscle fibres.1Nicolas Giuseppone from the University of Strasbourg and his teammates linked together strings of around 3000 macromolecular daisy-chain rotaxane monomers that contract under basic conditions. The resulting polymer went from 15.8 µm to 9.4 µm, movement in the range of that produced by sarcomere proteins, the basic building blocks of muscle. That amplifies a single daisy-chain rotaxane’s contraction by nearly four orders of magnitude, Giuseppone tells Chemistry World. ‘This is a result long expected by the community, but it...
  • ExBox snares polycyclic aromatic hydrocarbons

    10/19/2012 10:07:43 PM PDT · by neverdem · 17 replies
    Chemistry World ^ | 15 October 2012 | Simon Hadlington
    The macrocycle can trap polycyclic aromatic hydrocarbons US chemists have designed a novel macrocyclic molecule that may be able to scavenge an important class of toxic hydrocarbons from the environment. The rectangular cyclophane can trap a wide range of polycyclic aromatic hydrocarbons – PAHs – several of which are carcinogenic. The molecule, dubbed ExBox, was shown to remove PAHs from a sample of crude oil. Additionally, the crystallised complex of ExBox and particular PAHs contain stacked aromatic rings which could have novel or unusual electronic properties.The team, at Northwestern University in Illinois, constructed the cyclophane by taking an extended...
  • The Nobel Prize in Chemistry 2012 Robert J. Lefkowitz, Brian K. Kobilka (USA)

    10/10/2012 3:08:55 AM PDT · by AdmSmith · 8 replies
    The Royal Swedish Academy of Sciences ^ | 10 October 2012 | The Royal Swedish Academy of Sciences
    The Royal Swedish Academy of Sciences has decided to award the Nobel Prize in Chemistry for 2012 to Robert J. Lefkowitz, Howard Hughes Medical Institute and Duke University Medical Center, Durham, NC, USA and Brian K. Kobilka, Stanford University School of Medicine, Stanford, CA, USA "for studies of G-protein–coupled receptors"
  • US crime lab chemist arrest causes reverberations

    10/08/2012 1:08:58 PM PDT · by neverdem · 19 replies
    Chemistry World ^ | 8 October 2012 | Rebecca Trager
    <p>Last month’s arrest of a chemist, who worked in a Massachusetts Department of Public Health state laboratory, for allegedly falsifying evidence used in criminal cases is prompting calls for major forensic science reform in the US.</p> <p>Over her nine year career at the William A Hinton State Lab in Jamaica Plain the defendant, Annie Dookhan, tested about 60,000 samples involved in roughly 34,000 criminal cases. More than 1140 defendants have been incarcerated as a result of Dookhan’s work and those cases are now in doubt, says Terrel Harris, spokesperson for the Massachusetts Executive Office of Public Safety and Security.</p>
  • Biodegradable electronics here today, gone tomorrow

    09/27/2012 8:28:36 PM PDT · by neverdem · 6 replies
    NATURE NEWS ^ | 27 September 2012 | Katherine Bourzac
    Dissolvable electronic materials could be used in medical implants and environmentally friendly gadgets. A team of researchers has designed flexible electronic components that can dissolve inside the body, and in water. The components could be used to make smart devices that disintegrate once they are no longer useful, helping to alleviate electronic waste and enabling the development of medical implants that don’t need to be surgically removed. So far, the team has designed an imaging system that monitors tissue from within a mouse, a thermal patch that prevents infection after a surgical site is closed up, solar cells and strain...
  • Chemists develop reversible method of tagging proteins

    09/21/2012 3:53:34 PM PDT · by neverdem · 2 replies
    Biology News Net ^ | September 17, 2012 | NA
    Chemists at UC San Diego have developed a method that for the first time provides scientists the ability to attach chemical probes onto proteins and subsequently remove them in a repeatable cycle. Their achievement, detailed in a paper that appears online this week in the journal Nature Methods, will allow researchers to better understand the biochemistry of naturally formed proteins in order to create better antibiotics, anti-cancer drugs, biofuels, food crops and other natural products. It will also provide scientists with a new laboratory tool they can use to purify and track proteins in living cells. The development was the...
  • Thermoelectrics ‘pass new milestone’

    09/19/2012 2:29:53 PM PDT · by neverdem · 21 replies
    Chemistry World ^ | 19 September 2012 | Jon Cartwright
    Engineering PbTe on the panoscale making it exceptionally efficient at turning waste heat into electricity © Mercouri KanatzidisResearchers in the US claim to have passed a new milestone in thermoelectrics with a material that converts heat to electricity more efficiently than ever before. The new thermoelectric material, which employs ‘panoscale’ structuring to scatter phonons, has a figure of merit (FoM) some 20% better than previously achieved.Thermoelectrics convert heat to electricity and can, therefore, ‘harvest’ waste heat from the environment. When one end of a thermoelectric material is heated, electrons flow to the cooler side, creating a voltage across the material...
  • TNT for top guns

    09/14/2012 10:07:42 PM PDT · by neverdem · 6 replies
    Chemistry World ^ | 14 September 2012 | Laura Howes
    A short exposure, small aperture shot of the TNT formulation burning. The purple colour is down to the potassium perchlorate © WileyIt might seem counterintuitive but one way of making decoy flares for fighter planes better and safer is to make them out of TNT, say European scientists.Decoy flares are pyrotechnic devices shot out of aeroplanes to confuse heat seeking missiles. For the simpler missiles a hot flame will suffice but technology is always improving and advanced missiles now look for the tell tale signatures of water and carbon dioxide to distinguish between a plane and a flare. Of course,...