tag:blogger.com,1999:blog-4401989039263387042026-07-06T17:32:27.628+03:00Chemistry News ArticlesThe latest Chemistry News ArticlesChemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.comBlogger1882125tag:blogger.com,1999:blog-440198903926338704.post-77727936857315613112012-04-13T22:34:00.000+03:002012-04-13T22:34:00.739+03:00Quantum plasmons demonstrated in atomic-scale nanoparticles Addressing a half-decade-old debate, engineers at Stanford have positively identified the presence of plasmons, the collective oscillations of electrons, in individual metal particles as small as one nanometer in diameter. The discovery could impact nanotechnology.The physical phenomenon of plasmon resonances in small metal particles has been apparent for centuries. They are visible in the Chemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com4tag:blogger.com,1999:blog-440198903926338704.post-1210684420774929752012-04-13T18:27:00.000+03:002012-04-13T18:27:00.444+03:00New plastics 'bleed' when cut or scratched — and then heal like human skin "Mother Nature has endowed all kinds of biological systems with the ability to repair themselves," explained Professor Marek W. Urban, Ph.D., who reported on the research. "Some we can see, like the skin healing and new bark forming in cuts on a tree trunk. Some are invisible, but help keep us alive and healthy, like the self-repair system that DNA uses to fix genetic damage to genes. Our new Chemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com1tag:blogger.com,1999:blog-440198903926338704.post-14720355720604791112012-04-13T13:42:00.000+03:002012-04-13T13:42:00.458+03:00Brown liquor and solar cells to provide sustainable electricity A breakthrough for inexpensive electricity from solar cells, and a massive investment in wind power, will mean a need to store energy in an intelligent way. According to research at Linköping University, published in Science, batteries of biological waste products from pulp mills could provide the solution.Organic solar cells based on conductive plastic is a low cost alternative that has Chemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com0tag:blogger.com,1999:blog-440198903926338704.post-29250437744271361632012-04-13T07:34:00.000+03:002012-04-13T07:34:00.082+03:00Researchers create living human gut-on-a-chip Building on the Wyss Institute's breakthrough "Organ-on-Chip" technology that uses microfabrication techniques to build living organ mimics, the gut-on-a-chip is a silicon polymer device about the size of a computer memory stick. Wyss Founding Director, Donald Ingber, M.D., Ph.D., led the research team, which included Postdoctoral Fellow, Hyun Jung Kim, Ph.D; Technology Development Fellow, Dan Chemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com0tag:blogger.com,1999:blog-440198903926338704.post-32556933368163830812012-04-13T03:18:00.000+03:002012-04-13T03:18:00.221+03:00New inhibitors of a cancer-causing protein may lead to targeted therapeutics The activity of protein kinases, a large class of signaling molecules, must be closely regulated or signaling chaos arises within cells. Signaling chaos sets off a process that is implicated in the development of cancers, including solid tumors. Because protein kinases have a central role in cell signaling, researchers have devoted decades of investigation to developing protein kinase inhibitorsChemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com0tag:blogger.com,1999:blog-440198903926338704.post-62811054686464213042012-04-12T23:02:00.000+03:002012-04-12T23:02:00.241+03:00How electrons outrun vibrating nuclei -- the X-ray movie Researchers at the Max-Born-Institute, Berlin, Germany, resolved spatial oscillations of electrons in a crystal by taking a real-time 'movie' with ultrashort x-ray flashes. Outer electrons move forth and back over the length of a chemical bond and modulate the electric properties while the tiny elongation of the inner electrons and the atomic nuclei is less than 1% of this distance.A crystal Chemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com1tag:blogger.com,1999:blog-440198903926338704.post-9923723341038851102012-04-12T17:30:00.000+03:002012-04-12T17:30:01.295+03:00New twist on 1930s technology may become a 21st century weapon against global warming Far from being a pipe dream years away from reality, practical technology for capturing carbon dioxide -- the main greenhouse gas -- from smokestacks is aiming for deployment at coal-fired electric power generating stations and other sources, scientists saidin San Diego March 27. Their presentation at the 243rd National Meeting of the American Chemical Society was on a potential advance toward Chemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com1tag:blogger.com,1999:blog-440198903926338704.post-63843993559603025852012-04-12T13:28:00.000+03:002012-04-12T13:28:00.223+03:00Analyzing food quality with an artificial intestine: the NutriChipWhat happens in our bodies when we have eaten something? Are “healthy” food products actually good for us, once they have been digested and absorbed? Supported by Nano-Tera and Nestlé, the NutriChip project developed by Martin Gijs’s team at the Laboratory of Microsystems 2 (LMIS2) provides new insights to these questions. The NutriChip is a miniature artificial intestinal wall that can be used Chemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com0tag:blogger.com,1999:blog-440198903926338704.post-22202400167579032802012-04-12T07:40:00.000+03:002012-04-12T07:40:00.905+03:00Forces among molecules: Tiny but important Forces are not only associated with machines or muscles. You can also find them elsewhere, for instance between molecules. Theoretical chemists like Dr. Łukasz Tomasz Rajchel (University of Warsaw) are familiar with that. However, they -- or rather their computers -- are not capable of calculating them with high accuracy and efficiency at the same time.The scholarship holder of the Alexander vonChemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com0tag:blogger.com,1999:blog-440198903926338704.post-82007202042561173242012-04-12T01:00:00.000+03:002012-04-12T01:00:01.372+03:00New process converts polyethylene into carbon fiber (PhysOrg.com) -- In a paper published in Advanced Materials, a team led by Amit Naskar of the Materials Science and Technology Division outlined a method that allows not only for production of carbon fiber but also the ability to tailor the final product to specific applications."Our results represent what we believe will one day provide industry with a flexible technique for producing Chemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com0tag:blogger.com,1999:blog-440198903926338704.post-48059944000334170302012-04-11T20:43:00.000+03:002012-04-11T20:43:00.639+03:00Some flame retardants make fires more deadly Anna A. Stec, Ph.D., led the research, which focused on the most widely-used category of flame retardants, which contain the chemical element bromine. Scientists term these "halogen-based" flame retardants because bromine is in a group of elements called halogens."Halogen-based flame retardants are effective in reducing the ignitability of materials," Stec said. "We found, however, that flame Chemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com0tag:blogger.com,1999:blog-440198903926338704.post-25355908430349329882012-04-11T15:18:00.000+03:002012-04-11T15:18:00.314+03:00Images capture split personality of dense suspensions Stir lots of small particles into water, and the resulting thick mixture appears highly viscous. When this dense suspension slips through a nozzle and forms a droplet, however, its behavior momentarily reveals a decidedly non-viscous side. University of Chicago physicists recorded this surprising behavior in laboratory experiments using high-speed photography, which can capture action taking Chemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com0tag:blogger.com,1999:blog-440198903926338704.post-41340627716510344192012-04-11T10:39:00.000+03:002012-04-11T10:39:00.090+03:00Novel filter metal-organic framework material could cut natural gas refining costs Today, to separate hydrocarbon gas mixtures into the pure chemicals needed to make plastics, refineries "crack" crude oil at high temperatures – 500 to 600 degrees Celsius – to break complex hydrocarbons into lighter, short-chain molecules. They then chill the gaseous mixture to 100 degrees below zero Celsius to liquefy and divide the gases into those destined for plastics and those used as fuelChemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com0tag:blogger.com,1999:blog-440198903926338704.post-30190209535419694902012-04-11T04:02:00.000+03:002012-04-11T04:02:00.921+03:00New method for cleaning up nuclear wasteWhile the costs associated with storing nuclear waste and the possibility of it leaching into the environment remain legitimate concerns, they may no longer be obstacles on the road to cleaner energy.A new paper by researchers at the University of Notre Dame, led by Thomas E. Albrecht-Schmitt, professor of civil engineering and geological sciences and concurrent professor of chemistry and Chemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com0tag:blogger.com,1999:blog-440198903926338704.post-22872836506568191912012-04-10T22:11:00.000+03:002012-04-10T22:11:00.212+03:00Shiny new tool for imaging biomolecules At the heart of the immune system that protects our bodies from disease and foreign invaders is a vast and complex communications network involving millions of cells, sending and receiving chemical signals that can mean life or death. At the heart of this vast cellular signaling network are interactions between billions of proteins and other biomolecules. These interactions, in turn, are greatlyChemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com0tag:blogger.com,1999:blog-440198903926338704.post-37559338838913709742012-04-10T17:35:00.000+03:002012-04-10T17:35:00.133+03:00Protein 'jailbreak' helps breast cancer cells live All four proteins were already under suspicion. Researchers, for example, have already tried to assess what levels of HDAC6 in patients with estrogen-receptor positive breast cancer may mean for their prognosis. The results have been inconclusive. The new research suggests that measuring overall levels may not be enough, said the study's senior author Dr. Rachel Altura, associate professor of Chemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com0tag:blogger.com,1999:blog-440198903926338704.post-52978866006681639362012-04-10T11:09:00.000+03:002012-04-10T11:09:00.655+03:00Unexpected behaviour of microdropletsPhysicists agree that laminar flow of liquids has been well understood and described in detail from the theoretical point of view. Researchers at the Institute of Physical Chemistry of the Polish Academy of Sciences in Warsaw have, however, observed that droplets of chemical substances flowing in a carrier liquid inside microchannels -- although presenting laminar flow inside them -- present Chemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com0tag:blogger.com,1999:blog-440198903926338704.post-88178672147639305282012-04-10T04:31:00.000+03:002012-04-10T04:31:00.129+03:00Sweet success in hunt for honey's healing factor The ground-breaking research, carried out at Industrial Research Ltd (IRL), Plant & Food Research and Massey University, found that different varieties of New Zealand honey appear to trigger different immune responses. IRL's role was to provide its world-class expertise in the extraction, analysis, and purification of complex molecules that play an important role in biological systems.Comvita’s Chemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com0tag:blogger.com,1999:blog-440198903926338704.post-17265095302891831742012-04-09T22:57:00.000+03:002012-04-09T22:57:00.089+03:00Getting to the moon on drops of fuel Imagine reaching the Moon using just a fraction of a liter of fuel. With their ionic motor, MicroThrust, EPFL scientists and their European partners are making this a reality and ushering in a new era of low-cost space exploration. The complete thruster weighs just a few hundred grams and is specifically designed to propel small (1-100 kg) satellites, which it enables to change orbit around Chemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com0tag:blogger.com,1999:blog-440198903926338704.post-16129471193012291442012-04-09T16:45:00.000+03:002012-04-09T16:45:01.462+03:00Scientists unlock key to cancer cell death mystery A group led by the University of Leicester has shown that particular cancer cells are especially sensitive to a protein called p21. This protein usually forces normal and cancer cells to stop dividing but it was recently shown that in some cases it can also kill cancer cells.However, scientists have been unclear about how this happens.Researcher Salvador Macip, from the University of Leicester Chemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com0tag:blogger.com,1999:blog-440198903926338704.post-45680412856097536662012-04-09T10:32:00.000+03:002012-04-09T10:32:00.532+03:00Modified microbes turn carbon dioxide to liquid fuel Today, electrical energy generated by various methods is still difficult to store efficiently. Chemical batteries, hydraulic pumping and water splitting suffer from low energy-density storage or incompatibility with current transportation infrastructure.In a study published March 30 in the journal Science, James Liao, UCLA's Ralph M. Parsons Foundation Chair in Chemical Engineering, and his teamChemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com0tag:blogger.com,1999:blog-440198903926338704.post-21075281269420141382012-04-09T05:48:00.000+03:002012-04-09T05:48:00.445+03:00New process converts polyethylene into carbon fiberCommon material such as polyethylene used in plastic bags could be turned into something far more valuable through a process being developed at the Department of Energy's Oak Ridge National Laboratory.In a paper published in Advanced Materials, a team led by Amit Naskar of the Materials Science and Technology Division outlined a method that allows not only for production of carbon fiber but also Chemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com0tag:blogger.com,1999:blog-440198903926338704.post-30728518344698895842012-04-09T01:06:00.000+03:002012-04-09T01:06:00.166+03:00New nano-measurements add spark to centuries-old theory of friction The phenomenon of friction, when studied on a nanoscale, is more complex than previously thought. When friction occurs, an object does not simply slide its surface over that of another, it also makes a slight up-and-down movement. This finding completes a centuries-old theory of friction dating to 1699 and uncovers a gap in contemporary thinking on friction. The phenomenon -- termed lift-up Chemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com0tag:blogger.com,1999:blog-440198903926338704.post-2119129983633610782012-04-08T19:22:00.000+03:002012-04-08T19:22:00.417+03:00Infrared spectroscopy allows scientists to analyze protein structure on ultrafast timescale Now, MIT researchers have developed a way to analyze proteins that doesn’t require any pre-treatment. The technique is also extremely fast, allowing scientists to see, for the first time, how a protein changes its shape over picoseconds, or trillionths of a second.The researchers, led by chemistry professor Andrei Tokmakoff and postdoc Carlos Baiz, describe their new technique this month in the Chemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com1tag:blogger.com,1999:blog-440198903926338704.post-80795847926731166182012-04-08T13:42:00.000+03:002012-04-08T13:42:00.499+03:00Materials Inspired by Mother Nature: One-Pound Boat That Could Float 1,000 Pounds Combining the secrets that enable water striders to walk on water and give wood its lightness and great strength has yielded an amazing new material so buoyant that, in everyday terms, a boat made from 1 pound of the substance could carry five kitchen refrigerators, about 1,000 pounds.One of the lightest solid substances in the world, which is also sustainable, it was among the topics of a Chemistry Godhttp://www.blogger.com/profile/06660695941337470863noreply@blogger.com0