Wednesday, June 27, 2012

ScienceDaily: Biochemistry News

ScienceDaily: Biochemistry Newshttp://www.sciencedaily.com/news/matter_energy/biochemistry/ Read the latest research in biochemistry -- protein structure and function, RNA and DNA, enzymes and biosynthesis and more biochemistry news.en-usWed, 27 Jun 2012 03:06:45 EDTWed, 27 Jun 2012 03:06:45 EDT60ScienceDaily: Biochemistry Newshttp://www.sciencedaily.com/images/logosmall.gifhttp://www.sciencedaily.com/news/matter_energy/biochemistry/ For more science articles, visit ScienceDaily.Seeing inside tissue for no-cut surgeries: Researchers develop technique to focus light inside biological tissuehttp://www.sciencedaily.com/releases/2012/06/120626114322.htm Imagine if doctors could perform surgery without ever having to cut through your skin. Or if they could diagnose cancer by seeing tumors inside the body with a procedure that is as simple as an ultrasound. Thanks to a new technique, all of that may be possible in the not-so-distant future.Tue, 26 Jun 2012 11:43:43 EDThttp://www.sciencedaily.com/releases/2012/06/120626114322.htmBiological switch paves way for improved biofuel productionhttp://www.sciencedaily.com/releases/2012/06/120625160403.htm A mechanism that controls the way organisms breathe or photosynthesize has been discovered by scientists. The research could pave the way for improved biofuel production.Mon, 25 Jun 2012 16:04:04 EDThttp://www.sciencedaily.com/releases/2012/06/120625160403.htmNano-sandwich technique slims down solar cells, improves efficiencyhttp://www.sciencedaily.com/releases/2012/06/120625125803.htm Researchers have found a way to create much slimmer thin-film solar cells without sacrificing the cells' ability to absorb solar energy. Making the cells thinner should significantly decrease manufacturing costs for the technology.Mon, 25 Jun 2012 12:58:58 EDThttp://www.sciencedaily.com/releases/2012/06/120625125803.htmSpeeding up bone growth by manipulating stem cellshttp://www.sciencedaily.com/releases/2012/06/120625100915.htm Differentiation of stem cells into bone nodules is greatly accelerated by nanomolecular scaffolds.Mon, 25 Jun 2012 10:09:09 EDThttp://www.sciencedaily.com/releases/2012/06/120625100915.htmNew technique allows simulation of noncrystalline materialshttp://www.sciencedaily.com/releases/2012/06/120623094310.htm Scientists have found a new mathematical approach to simulating the electronic behavior of noncrystalline materials, which may eventually play an important part in new devices including solar cells, organic LED lights and printable, flexible electronic circuits.Sat, 23 Jun 2012 09:43:43 EDThttp://www.sciencedaily.com/releases/2012/06/120623094310.htmOxygen 'sensor' may shut down DNA transcriptionhttp://www.sciencedaily.com/releases/2012/06/120619092935.htm A key component found in an ancient anaerobic microorganism may serve as a sensor to detect potentially fatal oxygen, researchers have found. This helps researchers learn more about the function of these components, called iron-sulfur clusters, which occur in different parts of cells in all living creatures.Tue, 19 Jun 2012 09:29:29 EDThttp://www.sciencedaily.com/releases/2012/06/120619092935.htmChemists use nanopores to detect DNA damagehttp://www.sciencedaily.com/releases/2012/06/120618153427.htm Scientists are racing to sequence DNA faster and cheaper than ever by passing strands of the genetic material through molecule-sized pores. Now, scientists have adapted this ?nanopore? method to find DNA damage that can lead to mutations and disease.Mon, 18 Jun 2012 15:34:34 EDThttp://www.sciencedaily.com/releases/2012/06/120618153427.htmCarbon is key for getting algae to pump out more oilhttp://www.sciencedaily.com/releases/2012/06/120618111830.htm Overturning two long-held misconceptions about oil production in algae, scientists show that ramping up the microbes' overall metabolism by feeding them more carbon increases oil production as the organisms continue to grow. The findings may point to new ways to turn photosynthetic green algae into tiny "green factories" for producing raw materials for alternative fuels.Mon, 18 Jun 2012 11:18:18 EDThttp://www.sciencedaily.com/releases/2012/06/120618111830.htmIonic liquid improves speed and efficiency of hydrogen-producing catalysthttp://www.sciencedaily.com/releases/2012/06/120616145535.htm The design of a nature-inspired material that can make energy-storing hydrogen gas has gone holistic. Usually, tweaking the design of this particular catalyst -- a work in progress for cheaper, better fuel cells -- results in either faster or more energy efficient production but not both. Now, researchers have found a condition that creates hydrogen faster without a loss in efficiency.Sat, 16 Jun 2012 14:55:55 EDThttp://www.sciencedaily.com/releases/2012/06/120616145535.htmNanoparticles hold promise to improve blood cancer treatmenthttp://www.sciencedaily.com/releases/2012/06/120615204741.htm Researchers have engineered nanoparticles that show great promise for the treatment of multiple myeloma (MM), an incurable cancer of the plasma cells in bone marrow.Fri, 15 Jun 2012 20:47:47 EDThttp://www.sciencedaily.com/releases/2012/06/120615204741.htmImproving high-tech medical scannershttp://www.sciencedaily.com/releases/2012/06/120613153331.htm A powerful color-based imaging technique is making the jump from remote sensing to the operating room. Scientists are working to ensure it performs as well when spotting cancer cells in the body as it does with oil spills in the ocean.Wed, 13 Jun 2012 15:33:33 EDThttp://www.sciencedaily.com/releases/2012/06/120613153331.htmScientists synthesize first genetically evolved semiconductor materialhttp://www.sciencedaily.com/releases/2012/06/120613133341.htm In the not-too-distant future, scientists may be able to use DNA to grow their own specialized materials, thanks to the concept of directed evolution. Scientists have, for the first time, used genetic engineering and molecular evolution to develop the enzymatic synthesis of a semiconductor.Wed, 13 Jun 2012 13:33:33 EDThttp://www.sciencedaily.com/releases/2012/06/120613133341.htmNew energy source for future medical implants: Sugarhttp://www.sciencedaily.com/releases/2012/06/120613133150.htm An implantable fuel cell could power neural prosthetics that help patients regain control of limbs. Engineers have developed a fuel cell that runs on the same sugar that powers human cells: glucose. This glucose fuel cell could be used to drive highly efficient brain implants of the future, which could help paralyzed patients move their arms and legs again.Wed, 13 Jun 2012 13:31:31 EDThttp://www.sciencedaily.com/releases/2012/06/120613133150.htmLittle mighty creature of the ocean inspires strong new material for medical implants and armourhttp://www.sciencedaily.com/releases/2012/06/120613102130.htm A scientist may be onto an ocean of discovery because of his research into a little sea creature called the mantis shrimp. The research is likely to lead to making ceramics -- today's preferred material for medical implants and military body armour -- many times stronger. The mantis shrimp's can shatter aquarium glass and crab shells alike.Wed, 13 Jun 2012 10:21:21 EDThttp://www.sciencedaily.com/releases/2012/06/120613102130.htmProtein residues kiss, don't tell: Genomes reveal contacts, scientists refine methods for protein-folding predictionhttp://www.sciencedaily.com/releases/2012/06/120612145139.htm Researchers have created a computational tool to help predict how proteins fold by finding amino acid pairs that are distant in sequence but change together. Protein interactions offer clues to the treatment of disease, including cancer.Tue, 12 Jun 2012 14:51:51 EDThttp://www.sciencedaily.com/releases/2012/06/120612145139.htmPotential carbon capture role for new CO2-absorbing materialhttp://www.sciencedaily.com/releases/2012/06/120612101458.htm A novel porous material that has unique carbon dioxide retention properties has just been developed.Tue, 12 Jun 2012 10:14:14 EDThttp://www.sciencedaily.com/releases/2012/06/120612101458.htmWorkings behind promising inexpensive catalyst revealedhttp://www.sciencedaily.com/releases/2012/06/120611193636.htm A newly developed carbon nanotube material could help lower the cost of fuel cells, catalytic converters and similar energy-related technologies by delivering a substitute for expensive platinum catalysts.Mon, 11 Jun 2012 19:36:36 EDThttp://www.sciencedaily.com/releases/2012/06/120611193636.htmNanoparticles in polluted air, smoke & nanotechnology products have serious impact on healthhttp://www.sciencedaily.com/releases/2012/06/120611105311.htm New groundbreaking research has found that exposure to nanoparticles can have a serious impact on health, linking it to rheumatoid arthritis and the development of other serious autoimmune diseases. The findings have health and safety implications for the manufacture, use and ultimate disposal of nanotechnology products and materials. They also identified new cellular targets for the development of potential drug therapies in combating the development of autoimmune diseases.Mon, 11 Jun 2012 10:53:53 EDThttp://www.sciencedaily.com/releases/2012/06/120611105311.htmA SMART(er) way to track influenzahttp://www.sciencedaily.com/releases/2012/06/120611092345.htm Researchers have created a reliable and fast flu-detection test that can be carried in a first-aid kit. The novel prototype device isolates influenza RNA using a combination of magnetics and microfluidics, then amplifies and detects probes bound to the RNA. The technology could lead to real-time tracking of influenza.Mon, 11 Jun 2012 09:23:23 EDThttp://www.sciencedaily.com/releases/2012/06/120611092345.htmResearchers watch tiny living machines self-assemblehttp://www.sciencedaily.com/releases/2012/06/120610151304.htm Enabling bioengineers to design new molecular machines for nanotechnology applications is one of the possible outcomes of a new study. Scientists have developed a new approach to visualize how proteins assemble, which may also significantly aid our understanding of diseases such as Alzheimer's and Parkinson's, which are caused by errors in assembly.Sun, 10 Jun 2012 15:13:13 EDThttp://www.sciencedaily.com/releases/2012/06/120610151304.htmPhotosynthesis: A new way of looking at photosystem IIhttp://www.sciencedaily.com/releases/2012/06/120606155808.htm Using ultrafast, intensely bright pulses of X-rays scientists have obtained the first ever images at room temperature of photosystem II, a protein complex critical for photosynthesis and future artificial photosynthetic systems.Wed, 06 Jun 2012 15:58:58 EDThttp://www.sciencedaily.com/releases/2012/06/120606155808.htm1 million billion billion billion billion billion billion: Number of undiscovered drugshttp://www.sciencedaily.com/releases/2012/06/120606132316.htm A new voyage into "chemical space" ? occupied not by stars and planets but substances that could become useful in everyday life ? has concluded that scientists have synthesized barely one tenth of one percent of potential medicines. The report estimates that the actual number of these so-called "small molecules" could be one novemdecillion (that's one with 60 zeroes), more than some estimates of the number of stars in the universe.Wed, 06 Jun 2012 13:23:23 EDThttp://www.sciencedaily.com/releases/2012/06/120606132316.htmHalogen bonding helps design new drugshttp://www.sciencedaily.com/releases/2012/06/120605121639.htm Halogens particularly chlorine, bromine, and iodine ? have a unique quality which allows them to positively influence the interaction between molecules. This ?halogen bonding? has been employed in the area of materials science for some time, but is only now finding applications in the life sciences.Tue, 05 Jun 2012 12:16:16 EDThttp://www.sciencedaily.com/releases/2012/06/120605121639.htmFaster, more sensitive photodetector created by tricking graphenehttp://www.sciencedaily.com/releases/2012/06/120605102842.htm Researchers have developed a highly sensitive detector of infrared light that can be used in applications ranging from detection of chemical and biochemical weapons from a distance and better airport body scanners to chemical analysis in the laboratory and studying the structure of the universe through new telescopes.Tue, 05 Jun 2012 10:28:28 EDThttp://www.sciencedaily.com/releases/2012/06/120605102842.htmFilming life in the fast lanehttp://www.sciencedaily.com/releases/2012/06/120604092858.htm A new microscope enabled scientists to film a fruit fly embryo, in 3D, from when it was about two-and-a-half hours old until it walked away from the microscope as a larva.Mon, 04 Jun 2012 09:28:28 EDThttp://www.sciencedaily.com/releases/2012/06/120604092858.htmExpanding the genetic alphabet may be easier than previously thoughthttp://www.sciencedaily.com/releases/2012/06/120603191722.htm A new study suggests that the replication process for DNA -- the genetic instructions for living organisms that is composed of four bases (C, G, A and T) -- is more open to unnatural letters than had previously been thought. An expanded "DNA alphabet" could carry more information than natural DNA, potentially coding for a much wider range of molecules and enabling a variety of powerful applications, from precise molecular probes and nanomachines to useful new life forms.Sun, 03 Jun 2012 19:17:17 EDThttp://www.sciencedaily.com/releases/2012/06/120603191722.htmNanotechnology breakthrough could dramatically improve medical testshttp://www.sciencedaily.com/releases/2012/05/120531165752.htm A laboratory test used to detect disease and perform biological research could be made more than 3 million times more sensitive, according to researchers who combined standard biological tools with a breakthrough in nanotechnology.Thu, 31 May 2012 16:57:57 EDThttp://www.sciencedaily.com/releases/2012/05/120531165752.htmX-ray laser probes biomolecules to individual atomshttp://www.sciencedaily.com/releases/2012/05/120531145728.htm Scientists have demonstrated how the world's most powerful X-ray laser can assist in cracking the structures of biomolecules, and in the processes helped to pioneer critical new investigative avenues in biology.Thu, 31 May 2012 14:57:57 EDThttp://www.sciencedaily.com/releases/2012/05/120531145728.htmBuilding molecular 'cages' to fight diseasehttp://www.sciencedaily.com/releases/2012/05/120531145720.htm Biochemists have designed specialized proteins that assemble themselves to form tiny molecular cages hundreds of times smaller than a single cell. The creation of these miniature structures may be the first step toward developing new methods of drug delivery or even designing artificial vaccines.Thu, 31 May 2012 14:57:57 EDThttp://www.sciencedaily.com/releases/2012/05/120531145720.htmFree-electron lasers reveal detailed architecture of proteinshttp://www.sciencedaily.com/releases/2012/05/120531145630.htm Ultrashort flashes of X-radiation allow atomic structures of macromolecules to be obtained even from tiny protein crystals.Thu, 31 May 2012 14:56:56 EDThttp://www.sciencedaily.com/releases/2012/05/120531145630.htmRewriting DNA to understand what it sayshttp://www.sciencedaily.com/releases/2012/05/120531102207.htm Our ability to "read" DNA has made tremendous progress in the past few decades, but the ability to understand and alter the genetic code, that is, to "rewrite" the DNA-encoded instructions, has lagged behind. A new study advances our understanding of the genetic code: It proposes a way of effectively introducing numerous carefully planned DNA segments into genomes of living cells and of testing the effects of these changes. New technology speeds up DNA "rewriting" and measures the effects of the changes in living cells.Thu, 31 May 2012 10:22:22 EDThttp://www.sciencedaily.com/releases/2012/05/120531102207.htmNanodevice manufacturing strategy using DNA 'Building blocks'http://www.sciencedaily.com/releases/2012/05/120530152203.htm Researchers have developed a method for building complex nanostructures out of interlocking DNA "building blocks" that can be programmed to assemble themselves into precisely designed shapes. With further development, the technology could one day enable the creation of new nanoscale devices that deliver drugs directly to disease sites.Wed, 30 May 2012 15:22:22 EDThttp://www.sciencedaily.com/releases/2012/05/120530152203.htmBioChip may make diagnosis of leukemia and HIV faster, cheaperhttp://www.sciencedaily.com/releases/2012/05/120530104034.htm Inexpensive, portable devices that can rapidly screen cells for leukemia or HIV may soon be possible thanks to a chip that can produce three-dimensional focusing of a stream of cells, according to researchers.Wed, 30 May 2012 10:40:40 EDThttp://www.sciencedaily.com/releases/2012/05/120530104034.htmCellular computers? Scientists train cells to perform boolean functionshttp://www.sciencedaily.com/releases/2012/05/120530100041.htm Scientists have engineered cells that behave like AND and OR Boolean logic gates, producing an output based on one or more unique inputs. This feat could eventually help researchers create computers that use cells as tiny circuits.Wed, 30 May 2012 10:00:00 EDThttp://www.sciencedaily.com/releases/2012/05/120530100041.htmIon-based electronic chip to control muscles: Entirely new circuit technology based on ions and moleculeshttp://www.sciencedaily.com/releases/2012/05/120529113543.htm An integrated chemical chip has just been developed. An advantage of chemical circuits is that the charge carrier consists of chemical substances with various functions. This means that we now have new opportunities to control and regulate the signal paths of cells in the human body. The chemical chip can control the delivery of the neurotransmitter acetylcholine. This enables chemical control of muscles, which are activated when they come into contact with acetylcholine.Tue, 29 May 2012 11:35:35 EDThttp://www.sciencedaily.com/releases/2012/05/120529113543.htmMethod for building artificial tissue devisedhttp://www.sciencedaily.com/releases/2012/05/120528154859.htm Physicists have developed a method that models biological cell-to-cell adhesion that could also have industrial applications.Mon, 28 May 2012 15:48:48 EDThttp://www.sciencedaily.com/releases/2012/05/120528154859.htmSmallest possible five-ringed structure made: 'Olympicene' molecule built using clever synthetic organic chemistryhttp://www.sciencedaily.com/releases/2012/05/120528100253.htm Scientists have created and imaged the smallest possible five-ringed structure -- about 100,000 times thinner than a human hair. Dubbed 'olympicene', the single molecule was brought to life in a picture thanks to a combination of clever synthetic chemistry and state-of-the-art imaging techniques.Mon, 28 May 2012 10:02:02 EDThttp://www.sciencedaily.com/releases/2012/05/120528100253.htm'Unzipped' carbon nanotubes could help energize fuel cells and batterieshttp://www.sciencedaily.com/releases/2012/05/120527153818.htm Multi-walled carbon nanotubes riddled with defects and impurities on the outside could replace some of the expensive platinum catalysts used in fuel cells and metal-air batteries, according to scientists.Sun, 27 May 2012 15:38:38 EDThttp://www.sciencedaily.com/releases/2012/05/120527153818.htmSuper-sensitive tests could detect diseases earlierhttp://www.sciencedaily.com/releases/2012/05/120527153718.htm Scientists have developed an ultra-sensitive test that should enable them to detect signs of a disease in its earliest stages.Sun, 27 May 2012 15:37:37 EDThttp://www.sciencedaily.com/releases/2012/05/120527153718.htmCell?s transport pods look like a molecular version of robots from Transformershttp://www.sciencedaily.com/releases/2012/05/120525103614.htm Images of the cell's transport pods have revealed a molecular version of the robots from Transformers. Previously, scientists had been able to create and determine the structure of 'cages' formed by parts of the protein coats that encase other types of vesicles, but this study was the first to obtain high-resolution images of complete vesicles, budded from a membrane.Fri, 25 May 2012 10:36:36 EDThttp://www.sciencedaily.com/releases/2012/05/120525103614.htmDiscarded data may hold the key to a sharper view of moleculeshttp://www.sciencedaily.com/releases/2012/05/120524143527.htm There's nothing like a new pair of eyeglasses to bring fine details into sharp relief. For scientists who study the large molecules of life from proteins to DNA, the equivalent of new lenses have come in the form of an advanced method for analyzing data from X-ray crystallography experiments.Thu, 24 May 2012 14:35:35 EDThttp://www.sciencedaily.com/releases/2012/05/120524143527.htmNewly modified nanoparticle opens window on future gene editing technologieshttp://www.sciencedaily.com/releases/2012/05/120524123232.htm Researchers are using nanoparticles to simultaneously deliver proteins and DNA into plant cells. The technology could allow more sophisticated and targeted editing of plant genomes. And that could help researchers develop crops that adapt to changing climates and resist pests.Thu, 24 May 2012 12:32:32 EDThttp://www.sciencedaily.com/releases/2012/05/120524123232.htmUnusual quantum effect discovered in earliest stages of photosynthesishttp://www.sciencedaily.com/releases/2012/05/120524092932.htm Quantum physics and plant biology seem like two branches of science that could not be more different, but surprisingly they may in fact be intimately tied. Scientists have discovered an unusual quantum effect in the earliest stages of photosynthesis.Thu, 24 May 2012 09:29:29 EDThttp://www.sciencedaily.com/releases/2012/05/120524092932.htmBig step toward quantum computing: Efficient and tunable interface for quantum networkshttp://www.sciencedaily.com/releases/2012/05/120523135527.htm Quantum computers may someday revolutionize the information world. But in order for quantum computers at distant locations to communicate with one another, they have to be linked together in a network. While several building blocks for a quantum computer have already been successfully tested in the laboratory, a network requires one additonal component: A reliable interface between computers and information channels. Austrian physicists now report the construction of an efficient and tunable interface for quantum networks.Wed, 23 May 2012 13:55:55 EDThttp://www.sciencedaily.com/releases/2012/05/120523135527.htmRapid DNA sequencing may soon be routine part of each patient's medical recordhttp://www.sciencedaily.com/releases/2012/05/120522152655.htm Rapid DNA sequencing may soon become a routine part of each individual's medical record, providing enormous information previously sequestered in the human genome's 3 billion nucleotide bases. Recent advances in sequencing technology using a tiny orifice known as a nanopore are covered in a new a article.Tue, 22 May 2012 15:26:26 EDThttp://www.sciencedaily.com/releases/2012/05/120522152655.htmMethod to strengthen proteins with polymershttp://www.sciencedaily.com/releases/2012/05/120521164104.htm Scientists have synthesized polymers to attach to proteins in order to stabilize them during shipping, storage and other activities. The study findings suggest that these polymers could be useful in stabilizing protein formulations.Mon, 21 May 2012 16:41:41 EDThttp://www.sciencedaily.com/releases/2012/05/120521164104.htmTotally RAD: Bioengineers create rewritable digital data storage in DNAhttp://www.sciencedaily.com/releases/2012/05/120521163751.htm Scientists have devised a method for repeatedly encoding, storing and erasing digital data within the DNA of living cells. In practical terms, they have devised the genetic equivalent of a binary digit -- a "bit" in data parlance.Mon, 21 May 2012 16:37:37 EDThttp://www.sciencedaily.com/releases/2012/05/120521163751.htmDon't like blood tests? New microscope uses rainbow of light to image the flow of individual blood cellshttp://www.sciencedaily.com/releases/2012/05/120521115654.htm Blood tests convey vital medical information, but the sight of a needle often causes anxiety and results take time. A new device however, can reveal much the same information as a traditional blood test in real-time, simply by shining a light through the skin. This portable optical instrument is able to provide high-resolution images of blood coursing through veins without the need for harsh fluorescent dyes.Mon, 21 May 2012 11:56:56 EDThttp://www.sciencedaily.com/releases/2012/05/120521115654.htmZooming in on bacterial weapons in 3-D: Structure of bacterial injection needles deciphered at atomic resolutionhttp://www.sciencedaily.com/releases/2012/05/120521103808.htm The plague, bacterial dysentery, and cholera have one thing in common: These dangerous diseases are caused by bacteria which infect their host using a sophisticated injection apparatus. Through needle-like structures, they release molecular agents into their host cell, thereby evading the immune response. Researchers have now elucidated the structure of such a needle at atomic resolution. Their findings might contribute to drug tailoring and the development of strategies which specifically prevent the infection process.Mon, 21 May 2012 10:38:38 EDThttp://www.sciencedaily.com/releases/2012/05/120521103808.htmEngineers use droplet microfluidics to create glucose-sensing microbeadshttp://www.sciencedaily.com/releases/2012/05/120518132657.htm Tiny beads may act as minimally invasive glucose sensors for a variety of applications in cell culture systems and tissue engineering.Fri, 18 May 2012 13:26:26 EDThttp://www.sciencedaily.com/releases/2012/05/120518132657.htmChemists merge experimentation with theory in understanding of water moleculehttp://www.sciencedaily.com/releases/2012/05/120518081147.htm Using newly developed imaging technology, chemists have confirmed years of theoretical assumptions about water molecules, the most abundant and one of the most frequently studied substances on Earth.Fri, 18 May 2012 08:11:11 EDThttp://www.sciencedaily.com/releases/2012/05/120518081147.htmDiamond used to produce graphene quantum dots and nano-ribbons of controlled structurehttp://www.sciencedaily.com/releases/2012/05/120517193141.htm Researchers have come closer to solving an old challenge of producing graphene quantum dots of controlled shape and size at large densities, which could revolutionize electronics and optoelectronics.Thu, 17 May 2012 19:31:31 EDThttp://www.sciencedaily.com/releases/2012/05/120517193141.htmIn chemical reactions, water adds speed without heathttp://www.sciencedaily.com/releases/2012/05/120517143506.htm Scientists have discovered how adding trace amounts of water can tremendously speed up chemical reactions -? such as hydrogenation and hydrogenolysis ?- in which hydrogen is one of the reactants, or starting materials.Thu, 17 May 2012 14:35:35 EDThttp://www.sciencedaily.com/releases/2012/05/120517143506.htmPlant protein discovery could boost bioeconomyhttp://www.sciencedaily.com/releases/2012/05/120514104848.htm Three proteins have been found to be involved in the accumulation of fatty acids in plants. The discovery could help plant scientists boost seed oil production in crops. And that could boost the production of biorenewable fuels and chemicals.Mon, 14 May 2012 10:48:48 EDThttp://www.sciencedaily.com/releases/2012/05/120514104848.htmPhotonics: New approach to generating terahertz radiation will lead to new imaging and sensing applicationshttp://www.sciencedaily.com/releases/2012/05/120510095622.htm A new approach to generating terahertz radiation will lead to new imaging and sensing applications. The low energy of the radiation means that it can pass through materials that are otherwise opaque, opening up uses in imaging and sensing ? for example, in new security scanners. In practice, however, applications have been difficult to implement.Thu, 10 May 2012 09:56:56 EDThttp://www.sciencedaily.com/releases/2012/05/120510095622.htmIt's a trap: New lab technique captures microRNA targetshttp://www.sciencedaily.com/releases/2012/05/120509135959.htm To better understand how microRNAs -- small pieces of genetic material -- influence human health and disease, scientists first need to know which microRNAs act upon which genes. To do this scientists developed miR-TRAP, a new easy-to-use method to directly identify microRNA targets in cells.Wed, 09 May 2012 13:59:59 EDThttp://www.sciencedaily.com/releases/2012/05/120509135959.htmQuantum dots brighten the future of lightinghttp://www.sciencedaily.com/releases/2012/05/120508173349.htm Researchers have boosted the efficiency of a novel source of white light called quantum dots more than tenfold, making them of potential interest for commercial applications.Tue, 08 May 2012 17:33:33 EDThttp://www.sciencedaily.com/releases/2012/05/120508173349.htmMolecular container gives drug dropouts a second chancehttp://www.sciencedaily.com/releases/2012/05/120508152129.htm Chemists have designed a molecular container that can hold drug molecules and increase their solubility, in one case up to nearly 3,000 times.Tue, 08 May 2012 15:21:21 EDThttp://www.sciencedaily.com/releases/2012/05/120508152129.htmUltrasound idea: Prototype bioreactor evaluates engineered tissue while creating ithttp://www.sciencedaily.com/releases/2012/05/120503194229.htm Researchers have developed a prototype bioreactor that both stimulates and evaluates tissue as it grows, mimicking natural processes while eliminating the need to stop periodically to cut up samples for analysis.Thu, 03 May 2012 19:42:42 EDThttp://www.sciencedaily.com/releases/2012/05/120503194229.htmNew technique generates predictable complex, wavy shapes: May explain brain folds and be useful for drug deliveryhttp://www.sciencedaily.com/releases/2012/05/120503120130.htm A new technique predictably generates complex, wavy shapes and may help improve drug delivery and explain natural patterns from brain folds to bell peppers.Thu, 03 May 2012 12:01:01 EDThttp://www.sciencedaily.com/releases/2012/05/120503120130.htm

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Sunday, June 24, 2012

Facebook signs mobile apps privacy agreement

Published: Jun 22, 2012 at 2:10 PM PDT
SAN FRANCISCO (AP) - Facebook became the seventh company to agree to give people advance warning if its mobile applications pull personal information from mobile phones and tablet computers.

California Attorney General Kamala D. Harris said Friday that the agreement includes Facebook's own applications, as well as those made by third parties in its recently-launched App Center.

The agreement requires mobile apps seeking to collect personal information to display their privacy policies before their app is installed on a device.

Facebook says it incorporated the principles of the privacy agreement when it was designing its App Center.

The other six companies are Apple Inc., Google Inc., Amazon.com Inc., Microsoft Corp., Research in Motion Ltd. and Hewlett-Packard Co.

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used cooking oil for biodiesel or equitable oil

  • Quantity Required: 500 Tonne/Tonnes
  • Annual Purchase Volume: 20000 Tonne/Tonnes
  • Expiration Time: 15 Jul 2012

Buying Lead Details

Detailed Description

I am representing Paradise Environment & Energy (PEE)Company in Seoul, Korea. One of our business is importing used cooking oil for making biodiesel fuel. If price and quality requirement are satisfactory, we are able to process 20,000 ton per year. Therefore we would like you to send us your supply conditions, such as, min. quantity, price , quality, delivery, payment method, quality verification method, etc. In this relation, our detailed quality requirements are as follows. Quality Criteria of procured Oil for Biodiesel Quality Criteria Test Item Standard Acceptable Range Test Method Moisture (weight %) Less than 1% Up to 3%, price adjustment KS M ISO 12937 more than 3%, not accepted Total Acid Number (mg KOH/g) Less than 25% more than FFA 1%, price adjustment KS M ISO 6618 Solid Impurities Not allowed If detected, price adjustment EN 12662 Iodine Value More than 100 Not accepted in winter, more than 100 prEN ISO 660 Soap(%) Not allowed If detected, price adjustment Methanol(%) & Volatile Less than 1% Up to 3%, price adjustment EN 14110 more than 3%, not accepted pH more than 4 Not accepted, less than 4 pH Meter Safonification number More than 190 less than 190, price adjustment Phospher lipid Less than 200 ppm Please specify your product (UCO) as per the above requirements as much as you can and advise me with price condition. (FOB, CIF to Pusan port or Inchen port in Korea) If your detailed specifications are met, I will ask a sample for our acceptance test before purchase order. Your early response would be highly appreciated. Daniel Baek (K.H.Paik) CEO, PEE

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Saturday, June 23, 2012

Sinn Fein's McGuinness to meet Queen

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Stocks plunge after weak manufacturing reports

NEW YORK (AP) ? A quiet start on Wall Street quickly turned into a rout Thursday as the bad news piled up.

Commodity prices slumped in early trading after a report said manufacturing in China fell this month. Then, around 10 a.m., the Philadelphia branch of the Federal Reserve reported a sharp contraction in manufacturing in the Northeast. The report, the worst since last August, helped knock the Dow Jones industrial average down about 40 points.

By the afternoon, the Dow had dropped 199 points to 12,624, a loss of 1.6 percent. Alcoa fell the most of the 30 stocks in the average, 3.6 percent. Alcoa lost 32 cents to $8.60, leading a broad fall in commodities and materials companies. Signs of weakness in China are especially troubling since that country's economy has helped drive global economic growth over the past four years.

"The news has been horrible out there," said Uri Landesman, president of Platinum Partners. "The U.S. economy is slowing down. And China's growth is definitely under question."

The Standard & Poor's 500 index lost 22 points to 1,333, a decline of 1.7 percent. The Nasdaq composite fell 55 points, 1.9 percent, to 2,875. All three major indexes lost their gains for the week.

The batch of weak economic reports led a Goldman Sachs analyst to tell clients to place bets against the stock market. The analyst said the S&P 500 index may reach 1,285.

The late-morning blows to investor confidence were just the latest reasons for people to pull money of out stocks. Earlier Thursday, the Labor Department reported that the four-week average of applications for unemployment benefits, a figure closely watched by economists, jumped to the highest level since September. The National Association of Realtors also reported that sales of previously occupied homes dropped 1.5 percent in May.

All this a day after the Federal Reserve slashed its estimates for U.S. economic growth and said it would extend a bond-buying program through the end of the year, disappointing investors who had hoped for bolder steps from the central bank to get the economy going again.

"What's worse is that things are getting weaker without the Fed coming in," said Rex Macey, chief investment officer at Wilmington Trust Investment Advisors. "We had a run-up in the market this month because people had been expecting Fed action. Today, the market is giving it back."

A manufacturing survey for countries that use the European currency also showed a contraction. The reports out of China and Europe helped sink commodity prices. Copper and platinum fell 2 percent. The price of oil dipped below $80 for the first time since October.

Benchmark U.S. crude, on a steady slide since May, hit a low of $79.82 per barrel.

The Philadelphia Fed index pushed Treasury prices up and yields down as traders shifted money into the their favorite hiding spot. The yield on the 10-year note slipped to 1.61 percent, down from 1.63 percent late Wednesday.

Material and energy companies, whose fortunes are closely tied to economic swings, led eight of the 10 industry groups within the S&P 500 index lower. Utilities and telecommunication companies, which are considered defensive investments because of their reliable cash flows and rich dividends, edged higher. Just 15 of the 500 companies in the index rose.

In Europe, auditors calculated that Spain's troubled banks need as much as ?62 billion ($78.76 billion). A Bank of Spain official said this scenario was much less than the ?100 billion that the 17 countries in the euro currency union said they would provide for Spain's banking sector.

Among stocks making big moves:

? ConAgra Foods, a major food maker whose brands include Hebrew National and Chef Boyardee, gained 4 percent, leading the S&P 500. The company's adjusted earnings and sales topped Wall Street's expectations. The stock climbed 95 cents to $25.55.

? Bed Bath & Beyond plunged 15 percent, the most in the S&P 500. The retailer said it expects weaker earnings in the current quarter than analysts expected even though it reported better profits after the market closed Wednesday. Bed Bath & Beyond's stock lost $11.23 to $62.44.

? Red Hat slumped 5 percent. The largest provider of the Linux open source operating system for computers reported weak figures for deferred revenue. Red Hat's stock dropped $3.19 to $53.29.

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California voters narrowly reject new tobacco tax

(AP) ? A California initiative to increase the tax on tobacco to pay for cancer research has failed by less than a percentage point after remaining too close to call for more than two weeks.

With about 5 million ballots cast, opponents of Proposition 29 led by about 28,000 votes. The Associated Press analyzed areas where the roughly 105,000 uncounted votes remain and determined Friday there were not enough places where "yes" was winning to overcome the deficit.

As Prop 29 was failing 49.7 percent to 50.3 percent, proponents called it the narrowest defeat of a statewide ballot measure in California's history.

The plan to add $1 to the cigarette tax was headed by cyclist Lance Armstrong, a cancer survivor. Tobacco companies, led by Philip Morris, meanwhile pushed the opposition campaign, pouring millions of dollars into an advertising blitz that whittled away support. Polls showed approval peaked around two-thirds in March but had fallen dramatically by the June 5 balloting.

Support for the initiative was strongest in the San Francisco Bay Area, while more conservative places like Southern California's Inland Empire opposed it.

If the measure had passed, Californians would still have paid only the 16th highest tobacco tax in the nation, at $1.87 per pack.

Proponents said they would be back.

"This came so close, I think this is worth another try," said Stan Glantz of the University of California, San Francisco's Center for Tobacco Control Research and Education. "I think it would be horrible if Philip Morris and Reynolds get away with this."

He suggested that cigarette tax supporters might turn to the Legislature, though lawmakers routinely reject attempts to raise tobacco taxes.

The opposition campaign will wait until all the votes have been counted before declaring victory, spokeswoman Beth Miller said.

Opponents of the measure raised $47 million to fight it, a huge sum even by California standards. By comparison, Jerry Brown spent about $36 million in his successful 2010 bid to become governor of California. Wisconsin Gov. Scott Walker and his allies spent $47 million to beat back his recall challenge on June 5.

Armstrong and a coalition of anti-smoking groups raised about $12 million to bolster the measure, including $500,000 from New York City Mayor Michael Bloomberg.

In a statement Friday, Lance Armstrong Foundation President Doug Ulman framed the issue as one of life and death.

"The defeat of this life-saving initiative is a genuine tragedy," he said. "Big Tobacco lied to voters to protect its profits and spent $50 million to ensure it can continue peddling its deadly products to California kids."

While raising the price of tobacco has been shown to reduce smoking rates, especially in young people, campaign ads sponsored by tobacco companies focused on pocketbook issues. The ads noted money would be raised in California through the tax but wouldn't necessarily stay in the state for research. The campaign also raised the specter of an out-of-control bureaucracy that would be set up to oversee collection and distribution of the money.

The strategy didn't just stir doubt in the minds of voters.

Several major newspapers, including The Los Angeles Times, opposed the measure while expressing general support for such sin taxes and reluctance to side with tobacco companies. They argued that the revenue should go directly to the state, which now faces a $15.2 billion deficit.

The result was reminiscent a 2006 California cigarette tax measure that led by wide margins in early polling until tobacco companies spent $66 million to defeat it with ads featuring physicians.

Prop 29 was failing by a remarkably slim margin. Previously, the closest vote in the past two decades was on school bond measure 1B in 1994, which failed 49.6 percent to 50.4, according to Secretary of State spokeswoman Shannan Velayas. The second closest was another tobacco tax measure, which passed 50.5 percent to 49.5 percent in 1998.

California was once at the forefront of smoking restrictions and taxes, but the famously health-conscious state has not raised tobacco taxes since 1998. If the new tax had passed, California would still have had only the 16th highest tax rate in the nation.

Some smoking foes said they are weighing the idea of tackling the issue in the state Legislature.

The overwhelming majority of recent tobacco taxes across the nation have been approved in statehouses, not at the polls. But in California, where new taxes require a two-thirds vote in the Legislature, lawmakers have defeated more than 30 attempts to raise tobacco taxes in the last 30 years.

Missouri voters are expected to weigh in on a tobacco tax increase in November and similar taxes are working their way through the legislative process in the Rhode Island, Massachusetts and Illinois.

Associated Press

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Rio+20, the unhappy environmental summit

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Higgs boson buzz goes through ups and downs

CERN / CMS Collaboration

A computer graphic shows a typical Higgs boson candidate event, including two high-energy photons whose energy (depicted by red towers) is measured in the Compact Muon Solenoid's electromagnetic calorimeter. The yellow lines are the measured tracks of other particles produced in the collision. The pale blue volume represents the CMS' crystal calorimeter barrel.

By Alan Boyle

A week ago, sources started passing the word that physicists were "fired up" about further evidence for the existence of the Higgs boson, the last undiscovered particle predicted by the Standard Model and the main quarry for the $10 billion Large Hadron Collider.

That blaze of buzz reached a high point this week, when Columbia mathematician Peter Woit reported "reliable rumors"?that the confidence level for a detection of the Higgs' signature in the mass range of around 125 billion electron-volts, or 125 GeV, was increasing.

"CERN will soon have to decide how to spin this: will they announce discovery of the Higgs, or will they wait for some overwhelmingly convincing standard to be met, such as 5 sigma in at least one channel of one experiment?" Woit wrote.


"Sigma" refers to the statistical confidence that a given result is more than a fluke, with 5 sigma serving as the gold standard for a discovery. If you're a Higgs-watcher, you'll be hearing a lot about sigma in the next couple of weeks, leading up to the International Conference on High-Energy Physics, or ICHEP, in Australia from July 4 to 11. That's when the LHC's teams are due to provide a status report on the search for the Higgs.?

The Higgs hunt is hot because physicists have hypothesized about the boson for 40 years as part of the mechanism by which some particles acquire mass while others don't. The Higgs is so fundamental to the frontier of physics that Fermilab's Leon Lederman once called it the "God Particle"?? a term that most other physicists positively hate.?Finding it in the mass range where it's expected to be would serve as solid confirmation for the Standard Model, one of the most successful theories in the history of science. Not finding it would be more interesting: Physicists would have to consider some other mechanism, outside the Standard Model, to explain particle mass. And there's nothing theorists love more than a challenge like that.

In December, the teams behind the ATLAS and CMS detectors reported "tantalizing hints" of a Higgs detection at 125 GeV, with confidence levels of 3.6 sigma for ATLAS and 2.6 sigma for CMS. If the additional observations made since then show the same sorts of hints, those sigma levels should go up?? and that's been the gist of the buzz over the last week or so. For science geeks, that's a big deal, or at least a big meme: so big that the hashtag #HiggsRumors was for a time on top of Twitter's trending list, Discovery News' Jennifer Ouelette noted.

A lot of that trending took place because of the in-jokes spawned by the original buzz ??which has now fallen to a steady hum, thanks to a string of reality checks.

"Please do not believe the blogs," ATLAS spokeswoman Fabiola Gianotti told The New York Times. "I am very surprised that rumors appear on a subject that is really evolving daily," CMS spokesman Guido Tonelli told Science News. "The experimenters can't possibly have their data in presentable form yet, so the rumors can't be correct in every detail," Rutgers theoretical physicist Matt Strassler observed on his blog.

Union College physicist Chad Orzel, the author of "How to Teach Relativity to Your Dog," said the celebrity-level hype was?"the price of success":

"I mean, it?s not an accident that there?s a lot of excitement about the maybe-sorta-kinda discovery of the Higgs. This is the product of years of relentless hype from the particle physics community. They've been talking about this goddamn particle for longer than I've been running this blog, and it's finally percolated out into the general public consciousness enough that buzz about it can trend on Twitter. Complaining that your persistent effort to get people to care about particle physics esoterica has led to people being excited about particle physics esoterica seems more than a little churlish.

"So, lighten up. Revel in the success of your hype machine. God knows, if there were a Twitter trending topic about Bose-Einstein Condensation or anything else in atomic physics, I?d do the Happy Dance all the way down the hall. You?ve worked hard to make your elusive particle a celebrity, now reap the rewards."

The true reaping will come in a couple of weeks.?As Reuters' Robert Evans reported, the most recent readings from ATLAS and CMS are being analyzed in isolation, so that one team's conclusions don't influence the other team. Until the ICHEP actually takes place, hype is just about all we'll hear about. But in the meantime, get ready for the real news by reviewing these resources:

Update for 1 p.m. ET June 22: Europe's CERN particle-physics center just announced that the big update on the Higgs search will come on July 4, during a seminar at 3 a.m. ET that's tied to the start of the ICHEP conference.?

"We now have more than double the data we had last year," CERN's director for research and computing, Sergio Bertolucci, was quoted as saying. "That should be enough to see whether the trends we were seeing in the 2011 data are still there, or whether they?ve gone away. It?s a very exciting time."

CERN said that if a new particle is discovered, the ATLAS and CMS teams will need more time to ascertain whether it's the Higgs.

"It's a bit like spotting a familiar face from afar," CERN Director General Rolf Heuer explained. "Sometimes you need closer inspection to find out whether it?s really your best friend, or actually your best friend's twin."

CERN said physicists at the conference in Melbourne will be able to join the seminar via a live two-way link. The seminar will be followed by a news conference at CERN. There'll be a webcast available via?http://webcast.cern.ch. Stay tuned...


Alan Boyle is msnbc.com's science editor. Connect with the Cosmic Log community by "liking" the log's Facebook page, following @b0yle on Twitter and adding the?Cosmic Log page?to your Google+ presence. You can also check out?"The Case for Pluto,"?my book about the controversial dwarf planet and the search for new worlds.

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14 Elderberry Trce, Sugar Land, Texas 77479 at Real Estate Video ...

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Friday, June 22, 2012

Sony Xperia S (finally) gets its own Android 4.0 update (video)

Sony Xperia S gets Android 40 update

Sony's new flagship smartphone has finally caught up with its predecessors. Android Ice Cream Sandwich is now available on the Xperia S starting today. New features include the ability to display visuals during music playback, an updated calendar overview and notifications drop-down menu from the lock screen. The settings screen has been redesigned for a stronger stock Android feel, alongside Face Unlock and the camera lock screen shortcut we saw on the Galaxy Nexus. A new streaming movies app is also thrown into the update to make the most of that high-definition screen, while a new album app will offer an Ice Cream Sandwich-tinged interface for all your photos, videos and Facebook albums. Take a tour of the refresh after the break and check the source link more details -- Sony says the 200MB update will start rolling out today, but it will differ depending on carriers.

Continue reading Sony Xperia S (finally) gets its own Android 4.0 update (video)

Sony Xperia S (finally) gets its own Android 4.0 update (video) originally appeared on Engadget on Thu, 21 Jun 2012 07:19:00 EDT. Please see our terms for use of feeds.

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Look, no hands! Augmented reality gets a grip

1 day

FRANKFURT/HELSINKI One day in March 2000, just days before the dot-com bubble began its journey back to earth, German engineer Thomas Alt first glimpsed the future of technology.

"Do you know augmented reality?" his boss at Volkswagen asked.

He did not.

"Neither do I, but you are about to, because this will be your project," he said, dropping a stack of papers on his desk.

For the next three years, Alt developed a technology that overlays text or graphics on real-life images and objects. The resulting hybrid can be viewed on a smartphone, tablet or PC screen, and soon - the tech geek's fantasy - through dedicated specs.

Today, 37-year-old Alt partly owns Munich-based Metaio, one of the leading companies in the rapidly growing augmented reality (AR) industry. Along with dozens of other products, Alt has created an AR manual for Audi cars.

No more leafing through a crumpled manual to find out why the aircon's blowing hot in August. Point your phone at the offending gadget, and instructions pop up on the screen.

Augmented reality has been called the eighth mass medium, after print, recordings, cinema, radio, television, Internet and mobile phones.

By reaching out to media companies, the industry, which was a collection of smartphone apps generating less than $2 million in 2010, is on the verge of becoming a real business worth perhaps $1.5 billion in 2015.

"In the early days, we were talking about visionary ideas for the future. Today we come up with business models and products," said Maarten Lens-FitzGerald, co-founder and general manager at Layar, a Dutch start-up.

Layar, whose software has been downloaded more than 20 million times, hooking 3 million active users, has the world's most used consumer AR application, a reality browser that helps find services nearby, acquiring info on anything from favorite restaurants to networking opportunities via a mobile camera.

"We are actually making money and are becoming a little boring. But that is what the industry needs right now," said Lens-FitzGerald. "We actually try to hold back on visionary ideas. We are getting out of the gimmicky stuff."

Layar's demonstration video went viral in 2009. It showed period houses as seen from a boat on Amsterdam's canals. By pointing a camera at the houses, information about which were for sale and their prices is layered on the camera image.

Not for the faint-hearted, but another eye-opener for the house hunter, SpotCrime, by Popvox, will people the scene with the stylized muggers, murderers and burglars that have graced the neighborhood, too.

Chips with virtually everything
Sector executives speaking at the Reuters Media and Technology summit said most interest for their products came from the publishing industry and e-commerce.

Sweden's Ikea, famed for its low-price flat-pack furniture, has an app that lets you point a camera at a spot in your room and overlays an image of the furniture you are thinking of buying. Assembly is still down to you.

Heavy hitters are now throwing their weight behind the concept. Qualcomm, the top wireless chip maker, has bought up AR assets and opened its platform for software developers in 2010. ARM is also adding AR features to the chips it designs.

Chipmaker Intel has invested $14 million in Layar through its venture arm and is looking to add AR features to its chips.

Intel anticipated that ways of controlling a phone without touching it, such as by voice or by gesture, would be the next big developments.

The challenge is to make money out of those features.

"We would certainly anticipate a sharp rise in service adoption, although we would suggest that, given the continued uncertainty surrounding optimal monetization models, 2015 revenues are unlikely to exceed the $1.5 billion," said Juniper Research director Windsor Holden.

Laurence Tetrel Poupart, chief operating officer at Total Immersion, one of AR's front runners, agrees.

The company has been around since 1999 and expects to double sales this year to 20 million euros, but Tetrel Poupart said the technology has a little further to go to become a reliable money-spinner.

"We would definitely like to go for the virtual trying on of clothes, but some technical issues need to be resolved," she said, adding that the company needed faster chips to make the 'virtual dressing room' take off.

"We don't want you to see whether the clothing suits you but that it actually fits. We don't want it to be a gimmick, we want to have true usage, to reduce the return rate for the e-commerce merchants."

Try before you buy
Simpler applications have found their way to consumers, and businesses are very keen to use them.

Thomas Alt's Audi manual is one example. Another is a Layar application that helps publishers more easily link print and digital content. By pointing their smartphones at a magazine, readers can get information about products featured in articles, and go on to buy them.

"At the same time, companies get loads of feedback about consumer behavior, which they can use for marketing purposes," said Alt, who has also developed a similar product for German magazine Stern, owned by Bertelsmann's Gruner + Jahr publishers.

Currently more than 10 million German magazines with AR features hit the shelves every month, including titles from publisher Axel Springer.

Companies are lining up to use the technology, said Tetrel Poupart. "But we are now in a phase that we need to discourage companies from going for another gimmick."

Total Immersion has seen strong interest in its software, which allows consumers to try on glasses without physically touching them.

There is still a long way to go before augmented reality catches up with the movies, however; it is nearly three decades since Arnold Schwarzenegger as the Terminator viewed mission-critical data and images projected on the inside of his aviator shades.

Google has launched what it has dubbed "Project Glass" to develop such features, but it is viewed as a long shot.

"Since I started, this has been the ultimate dream in the industry. I don't buy it so much," Tetrel Poupart said.

"It makes you dizzy. I think we should use augmented reality in a more simple way and use the tablet. The tablet is a key device. It is here."

Eventually she expects traditional television screens - connected to the Internet with a built-in camera - to be a significant driver for both AR and the e-commerce industry.

"You use your television set as a mirror, trying on and ordering your clothes from your home."

Buyer beware -- if the trend continues, you'll have nowhere to go to wear them.

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Environmental estrogens affect early developmental activity in zebrafish

Environmental estrogens affect early developmental activity in zebrafish [ Back to EurekAlert! ] Public release date: 21-Jun-2012
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Contact: Phyllis Edelman
pedelman@genetics-gsa.org
301-351-0896
Genetics Society of America

MADISON, WI June 21, 2012 Chemicals in the environment that mimic estrogen can strongly influence the development of humans and other animals. New research to be presented at the 2012 International Zebrafish Development and Genetics Conference, held June 20-24 in Madison, Wisconsin, reveals that these substances may act even earlier than previously realized, at the very beginning stages of embryonic development.

Estrogenic compounds in the environment are both naturally occurring, such as in food plants, and synthetic, such as bisphenol A (BPA), used in making hard plastic bottles, like baby bottles and metal-based food and beverage cans, including those for baby formula. They are known to affect development of the sex organs, but not much is known about other effects, including any at beginning embryonic development. "The timing of exposure is critical. Evidence from animals suggests that there are critical periods of development when endocrine disruptors could be more deleterious than exposure during adulthood," says Daniel Gorelick, Ph.D., a postdoctoral fellow at the Carnegie Institution for Science.

Working with Professor Marnie Halpern, Ph.D., Dr. Gorelick discovered a new and unexpected activity of estrogenic compounds during early stages of embryonic development. He will present his findings at the conference on Sunday, June 24.

The researchers used zebrafish, which offer several advantages for studying this question. "People have used fish as environmental sentinels for aquatic pollution for decades," Dr. Gorelick says. Most studies, however, have been limited to fairly crude effects such as death or large-scale changes in single genes.

The researchers took advantage of the genetic tools available for zebrafish to study where and when estrogen receptors are active throughout the body. They genetically developed fish whose cells make a green fluorescent protein when their estrogen receptors are activated and looked at the fish early in development, during formation of the major tissues and organ systems, including the heart, gut, and central nervous system. Because zebrafish embryos are optically transparent during early development, the researchers were able to see individual estrogen-responsive cells in living, growing embryos.

"We found some things that were expected, which was estrogen receptor activity in the liver and parts of the brain known to be estrogen-responsive," Dr. Gorelick says. "The big surprise was finding it in the heart, and specifically in heart valves, which to my knowledge had not been known to be sensitive to estrogens."

In fact, the heart appears to be even more sensitive than other organs to some estrogenic compounds, particularly genistein (a common dietary estrogen found in plants) and BPA.

That finding prompted the researchers to look for possible effects of environmental estrogens. In collaboration with the Fish Health Branch of the U.S. Geological Survey and the University of Maryland School of Medicine, they collected concentrated water samples from in and around the Chesapeake Bay and found that these water samples also activate the zebrafish estrogen receptors, with especially high activation in the heart valves.

Researchers don't yet know what role estrogen sensitivity in the heart may play, nor how the fish's development may be affected by such early exposure to estrogenic compounds. As with many signaling molecules, it's likely that both the timing and the amount of exposure are critical.

"They can respond to estrogens in the lab, but also estrogens in the environment in samples from local rivers and streams," Dr.Gorelick says. "They're everywhere and they're unavoidable, but it's the dose that makes the poison."

Dr. Gorelick and his colleagues are now working to identify specific compounds from the water samples that activate the receptors, as well as to learn what physiological role estrogen receptor activity plays in heart development and function.

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ABOUT THE INTERNATIONAL CONFERENCE ON ZEBRAFISH GENETICS AND DEVELOPMENT: The zebrafish emerged as a major model system in 1994 with the first international conference at Cold Spring Harbor with 350 participants. This year the zebrafish community celebrates its 10th biennial international conference with more than 900 participants in Madison, WI. Studies using the zebrafish as a model system have allowed us to understand the genetic control of early development that underlie many human diseases. For more information about the conference, see http://www.zebrafishgenetics.org/

ABOUT GSA: Founded in 1931, the Genetics Society of America (GSA) is the professional membership organization for scientific researchers, educators, bioengineers, bioinformaticians and others interested in the field of genetics. Its nearly 5,000 members work to advance knowledge in the basic mechanisms of inheritance, from the molecular to the population level. GSA is dedicated to promoting research in genetics and to facilitating communication among geneticists worldwide through its conferences, including the biennial conference on Model Organisms to Human Biology, an interdisciplinary meeting on current and cutting edge topics in genetics research, as well as annual and biennial meetings that focus on the genetics of particular organisms, including C. elegans, Drosophila, fungi, mice, yeast, and zebrafish. GSA publishes Genetics, a leading journal in the field and an online, open-access journal, G3: Genes|Genomes|Genetics. For more information about GSA, please visit www.genetics-gsa.org. Also follow GSA on Facebook at facebook.com/GeneticsGSA and on Twitter @GeneticsGSA.


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Environmental estrogens affect early developmental activity in zebrafish [ Back to EurekAlert! ] Public release date: 21-Jun-2012
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Contact: Phyllis Edelman
pedelman@genetics-gsa.org
301-351-0896
Genetics Society of America

MADISON, WI June 21, 2012 Chemicals in the environment that mimic estrogen can strongly influence the development of humans and other animals. New research to be presented at the 2012 International Zebrafish Development and Genetics Conference, held June 20-24 in Madison, Wisconsin, reveals that these substances may act even earlier than previously realized, at the very beginning stages of embryonic development.

Estrogenic compounds in the environment are both naturally occurring, such as in food plants, and synthetic, such as bisphenol A (BPA), used in making hard plastic bottles, like baby bottles and metal-based food and beverage cans, including those for baby formula. They are known to affect development of the sex organs, but not much is known about other effects, including any at beginning embryonic development. "The timing of exposure is critical. Evidence from animals suggests that there are critical periods of development when endocrine disruptors could be more deleterious than exposure during adulthood," says Daniel Gorelick, Ph.D., a postdoctoral fellow at the Carnegie Institution for Science.

Working with Professor Marnie Halpern, Ph.D., Dr. Gorelick discovered a new and unexpected activity of estrogenic compounds during early stages of embryonic development. He will present his findings at the conference on Sunday, June 24.

The researchers used zebrafish, which offer several advantages for studying this question. "People have used fish as environmental sentinels for aquatic pollution for decades," Dr. Gorelick says. Most studies, however, have been limited to fairly crude effects such as death or large-scale changes in single genes.

The researchers took advantage of the genetic tools available for zebrafish to study where and when estrogen receptors are active throughout the body. They genetically developed fish whose cells make a green fluorescent protein when their estrogen receptors are activated and looked at the fish early in development, during formation of the major tissues and organ systems, including the heart, gut, and central nervous system. Because zebrafish embryos are optically transparent during early development, the researchers were able to see individual estrogen-responsive cells in living, growing embryos.

"We found some things that were expected, which was estrogen receptor activity in the liver and parts of the brain known to be estrogen-responsive," Dr. Gorelick says. "The big surprise was finding it in the heart, and specifically in heart valves, which to my knowledge had not been known to be sensitive to estrogens."

In fact, the heart appears to be even more sensitive than other organs to some estrogenic compounds, particularly genistein (a common dietary estrogen found in plants) and BPA.

That finding prompted the researchers to look for possible effects of environmental estrogens. In collaboration with the Fish Health Branch of the U.S. Geological Survey and the University of Maryland School of Medicine, they collected concentrated water samples from in and around the Chesapeake Bay and found that these water samples also activate the zebrafish estrogen receptors, with especially high activation in the heart valves.

Researchers don't yet know what role estrogen sensitivity in the heart may play, nor how the fish's development may be affected by such early exposure to estrogenic compounds. As with many signaling molecules, it's likely that both the timing and the amount of exposure are critical.

"They can respond to estrogens in the lab, but also estrogens in the environment in samples from local rivers and streams," Dr.Gorelick says. "They're everywhere and they're unavoidable, but it's the dose that makes the poison."

Dr. Gorelick and his colleagues are now working to identify specific compounds from the water samples that activate the receptors, as well as to learn what physiological role estrogen receptor activity plays in heart development and function.

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ABOUT THE INTERNATIONAL CONFERENCE ON ZEBRAFISH GENETICS AND DEVELOPMENT: The zebrafish emerged as a major model system in 1994 with the first international conference at Cold Spring Harbor with 350 participants. This year the zebrafish community celebrates its 10th biennial international conference with more than 900 participants in Madison, WI. Studies using the zebrafish as a model system have allowed us to understand the genetic control of early development that underlie many human diseases. For more information about the conference, see http://www.zebrafishgenetics.org/

ABOUT GSA: Founded in 1931, the Genetics Society of America (GSA) is the professional membership organization for scientific researchers, educators, bioengineers, bioinformaticians and others interested in the field of genetics. Its nearly 5,000 members work to advance knowledge in the basic mechanisms of inheritance, from the molecular to the population level. GSA is dedicated to promoting research in genetics and to facilitating communication among geneticists worldwide through its conferences, including the biennial conference on Model Organisms to Human Biology, an interdisciplinary meeting on current and cutting edge topics in genetics research, as well as annual and biennial meetings that focus on the genetics of particular organisms, including C. elegans, Drosophila, fungi, mice, yeast, and zebrafish. GSA publishes Genetics, a leading journal in the field and an online, open-access journal, G3: Genes|Genomes|Genetics. For more information about GSA, please visit www.genetics-gsa.org. Also follow GSA on Facebook at facebook.com/GeneticsGSA and on Twitter @GeneticsGSA.


[ Back to EurekAlert! ] [ | E-mail | Share Share ]

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AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.


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