AAAS US Presidential Candidates' Forum
...ident Bush emphasized bandwidth, research toward a hydrogen economy, and recruiting science and technology to ...y 18% over the next decade through next-generation hydrogen and clean coal technologies. When asked about the future of embryonic stem-cell lines, Kerry wrote t...Genetic modification of linseed produces healthier omega 3 and 6 fatty acids
...d one oil-soluble methyl end, and are studded with hydrogen atoms along the length of the carbon chain. They a...between carbon atoms are said to be "saturated" by hydrogen atoms, whereas the introduction of double bonds between carbon atoms leads to correspondingly fewer ...Two Virginia Tech energy-related inventions win R&D 100 awards
... Fuel cells convert chemical energy from hydrogen or methanol fuels into electrical energy. PEM fuel cells use an ion-containing polymer (a form of plastic) for this process. Electrons are captured to generate electricity and protons pass through the membrane film, then combine with oxygen to create...Cell's gatekeeper for ammonia revealed in unprecedented detail
... the ammonia reaches the other side, it regains a hydrogen atom again to become NH4+. "This mechanism provides the precise filter that prevents any other molecules or charged molecules from leaking through this channel," Stroud said. "This ensures the health of the cell while providing a way for the cell to ...Meteorites supplied Earth life with phosphorus
...ximately one phosphorus atom for every 2.8 million hydrogen atoms in the cosmos, every 49 million hydrogen atoms in the oceans, and every 203 hydrogen atoms in bacteria. Similarly, there's a single phosphoru...Cleaner water, more efficient electricity among UH chemical research
... promote the catalytic decomposition of water into hydrogen and oxygen. Ramanan Krishnamoorti, associate professor of chemical engineering, will reveal the development of super-strength and lightweight fibers of nylon and other polyester-based polymers, as well as development of a new class of biodegradab...Dispute over life in Antarctic lake
...ucts of this hyper-oxygenated environment, such as hydrogen peroxide and highly reactive free radicals, would destroy living organisms. Jean Robert Petit of the Laboratory of Glaciology and Geophysics of the Environment at Grenoble, France, agrees. "It's a cold hell," he says. "It was once an open pond which...DFG presents the 2004 MAK and BAT value lists
...demiology and animal experiments. The MAK value of hydrogen chloride was reduced from 5 ppm to 2 ppm. For six ...s changed or new ones were proposed; the values of hydrogen bromide, chlorine, propane, pentane, octane and diphenyl were confirmed after a thorough examination...Study finds plant enzyme function changes with location in cell
...fruit fly for plant scientists. Desaturases remove hydrogen atoms from fatty acid chains to create carbon-carbon double bonds, desaturating the fat. While using yeast cells to determine the functions of several newly discovered Arabidopsis desaturases, Heilmann and Shanklin noticed that one of the enzymes ap...Continents played key role in collapse and regeneration of Earth's early greenhouse, geologists say
...ntinental crust. Carbonic acid dissociated to form hydrogen ions, which found their way into the structures of weathering minerals, and bicarbonate, which was carried down rivers and streams to be deposited as limestone and other minerals in ocean sediments. Over time, great slabs of oceanic crust wer...Christopher Walsh wins 2004 Promega Biotechnology Research Award
... showed how pathogenic enterococci eliminate a key hydrogen bond in their cell walls to alter the effectiveness of this drug, has also directly affected current antibiotic development. Walsh's research has had other, far-reaching implications as well: his attention to vancomycin resistance heightened awarenes...Seabed secrets in English clay
...e bacteria -- which thrive only in oxygen-free but hydrogen sulfide-rich aquatic environments -- apparently co-existed with ancient, oxygen-breathing sea reptiles and other bottom-dwellers in a shallow part of a sea that's now the region of east-central England around Peterborough. "It should have be...Elusive but ubiquitous microbe fingered as gum disease culprit in Stanford study
...uctively. Lepp said they are now looking for other hydrogen consumers to test their theory. "In my mind, it's increasingly clear that the disease may be the result of a community disturbance rather than the presence or absence of a particular organism," Relman said. Relman also sees a potentially broader side...Decoding a sulfate-breathing bug
...es evidence that the microbe uses a process called hydrogen cycling to increase the efficiency of its energy metabolism. "With the genome sequence, we have a frame in which our theories and data must function. We have yet to see the frame very clearly, but that is developing," says Judy D. Wall, a bioche...Physics tip sheet #41 - April 5, 2004
...enter of multi-walled carbon nanotubes formed in a hydrogen arc discharge, and produced images of them with high-resolution transmission electron microscopy. According to the researchers' calculations, the record-setting nanotubes are likely capped at each end by cages formed of twelve carbon atoms. Prior to ...Water molecules clump more loosely than previously thought
...gests, each water molecule is made of two atoms of hydrogen and one of oxygen. In ice, water molecules are arr...y linked to four others through what chemists call hydrogen bonds. In a hydrogen bond, electrostatic forces stick together a hydrogen atom from one molecule wit......gests, each water molecule is made of two atoms of hydrogen and one of oxygen. In ice, water molecules are arr...y linked to four others through what chemists call hydrogen bonds. In a hydrogen bond, electrostatic forces stick together a hydrogen atom from one molecule wit...Ethanol to power the future of hydrogen fuel cells
...dioxide. However the prevalent method of producing hydrogen from hydrocarbons, though economical, creates poll... are a better solution than power fuel cells since hydrogen is expensive and dangerous to handle," notes Technical Insights Analyst Al Hester. "More research sh...Rockefeller University scientists take on controversial 'vibration theory' of smell
...e is acetophenone that is modified to have all its hydrogen atoms replaced by deuterium atoms. This minor chemical change has only slight effects on shape, but according to Turin has major effects on vibration. In several different tests, none of the subjects could tell the difference between the two. "They...Researchers discover 1.2 million new genes in Sargasso Sea microbes
...ntific challenges: research on photosynthesis and hydrogen production to determine if the efficiency, and thus the utility, of these natural microbial processes can be greatly improved; strategies to create a synthetic minimal genome that may speed our ability to develop biology-based solutions for some of ...