Tag: "hydrogen" at biology news

Research highights from Pacific Northwest National Laboratory

...processors used to convert pipeline natural gas to hydrogen for use in hydrogen-based fuel cells. PNNL is teaming with Siemens Westinghouse Power Corp. to test the system. Sizing up seismic shakes - Millions of earthquakes occur around the world every year. The vast majority are naturally occurring phenom...

Basic motion measuring technology may be alternative to more expensive testing procedures

...ter (DLW), composed of special forms (isotopes) of hydrogen and oxygen, has been used in previous studies to estimate the energy expenditure of various military personnel doing their jobs in a variety of places. The results from these tests, have been accepted as highly accurate, but expensive. The Study A ...

Caterpillar saliva beats plant defenses

...ts the simple sugar glucose into gluconic acid and hydrogen peroxide. "While glucose oxidase is produced in ...sugar, the researchers looked at gluconic acid and hydrogen peroxide. The gluconic acid reduced nicotin production by 29 percent and the hydrogen peroxide redu...

Urbana chemist wins national award for contributions to cleaner fuels

... transfer it away from the raw fossil fuel to form hydrogen sulfide, a gas. That done, the catalyst is ready for another load. Once you understand exactly how they work, you can make them better. The fuels we use have to keep getting cleaner, and the resources themselves are getting dirtier, he added. Rauchfu...

Orgin of mysterious subterranean gases identified, says University of Toronto researcher

...ar Timmins, Ont. Analyses of the gases' carbon and hydrogen isotope ratios found that the gases matched hydroc... According to Sherwood Lollar, the hydrocarbon and hydrogen gases could be a food source. "These deep biosphere bacteria could 'digest' the gases through a form...

Scientist probes fossil oddity: Giant redwoods near North Pole

...ey measured the presence of isotopes of oxygen and hydrogen in the fossilized metasequoias. The wood of any t... anywhere records fairly faithfully the oxygen and hydrogen chemistry of the water the plant has access to through precipitation, Jahren explains. And theres a ...

Dietary changes can lower colon cancer risk in families with a history of the disease

... as methylation, in which specialized compounds of hydrogen and carbon are attached to various structures and products of cells. Methylation plays a vital role, for example, in creating the building blocks of DNA within cells. Without sufficient methylation, the DNA structure may become unstable, raising the...

'Back at square one' to find culprit in familial ALS

...damaging "superoxide" molecules into less damaging hydrogen peroxide. The hydrogen peroxide is then turned into harmless water by another enzyme. "Initially we thought finding out wha...

Fusion in a flash?

...les in deuterated acetone (acetone with its normal hydrogen atoms replaced by deuterium, a heavy hydrogen isotope that can undergo fusion reactions). The experiments entire apparatus is well within the boun...

Worm neuron research may lead to powerful model for Parkinson's study

...s. "Just one small addition of an oxygen and a hydrogen in just the right place in that molecule renders it very, very reactive in causing oxidative damage to the cell," Blakely said. Even more intriguing, 6-OHDA has been found in brain and urine samples of PD patients, suggesting it might somehow par...

X-ray analysis of shipwreck may help conservators save waterlogged artifacts

... bacteria that convert sulfate ions in seawater to hydrogen sulfide. In the hundreds of years that the Vasa was submerged, hydrogen sulfide penetrated into the deepest layers of the wood. Under the sea, chemical reactions turn hydro...

Alien life forms more likely to be found outside solar system, says Colorado prof.

...dation and reduction of geothermal compounds using hydrogen and carbon dioxide to form methane, or using hydrogen sulfide and oxygen to produce sulfuric acid. "We commonly see these processes with sediments under ...

Still waters? 'Clear-cutting' robs the deep-sea of ancient treasures

...ent-dwellers extract energy from compounds such as hydrogen sulfide or methane. For scientists studying such extremophiles, evolutionary mysteries persist: Weird tubeworms in cold seeps off southern California, for instance, are genetically similar to those found in the West Florida Escarpment seeps, yet it's...

Researchers link migratory birds' winter, summer ranges

... just after the breeding season contain carbon and hydrogen isotope signatures that reflect a bird's diet and that of the local (breeding) environment. Because the isotopes vary naturally among geographic areas in North America and because the birds only molt once a year (in the breeding areas), analyses of i...

Chemical evidence proves the old adage, Birds of a feather flock together

...hers analyzed minute chemical traces of carbon and hydrogen in the feathers of black-throated blue warblers (D...tes of individual warblers by measuring carbon and hydrogen isotopes that naturally accumulate in the birds feathers during long migrations. Isotopes are atoms ...

Deep sea creatures collected for studies

...nd mussels survive by chemosynthesis. They convert hydrogen sulfide from the vents as an energy source (instea...ydrates. In the tanks they are being provided with hydrogen sulfide, which is poisonous to most forms of life. The crabs are eating pieces of squid. The animal...

How vitamin C prevents cancer--but apples are better

... that vitamin C blocks the carcinogenic effects of hydrogen peroxide on intercellular communication. Until th...tion intercellular communication (GJIC) induced by hydrogen peroxide," says Lee. GJIC is essential for maintaining normal cell growth. Inhibition of GJIC is st...

UMass researchers find environment on Earth that mimics Mars geochemically and supports ancient life form

...sms can thrive in the absence of sunlight by using hydrogen gas released from deep in the Earths surface as th...ne-producing microorganisms that live by combining hydrogen with carbon dioxide to make methane gas. They do not require organic carbon in order to grow. This i...

CNS cell death in bacterial meningitis

...duced by either of two secreted bacterial factors: hydrogen peroxide and the toxic protein pneumolysin, which forms pores in animal cell membranes. The authors inactivated both of these factors, first by using bacterial strains with specific mutations that block their production, and second by adding exogenou...

Aquaporins - the perfect water filters of the cell

...onduct protons well; protons can hop via so-called hydrogen bonds from one water molecule to the next. So, how...he permeation of protons is blocked by breakage of hydrogen bonds between passing water molecules. Such breakage would usually be energetically unfavorable (thi...

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