Tag: "hydrogen" at biology news

Chemical Reaction Believed To Support Underground Microbes Is Now Unlikely

... It had been generally accepted by scientists that hydrogen gas producedfrom rock could provide energy to supp...e, says U. Mass. microbiologist Derek Lovley. The hydrogen was thought to be produced when basalt, a common form of rock, reactswith water. However, a ...

University Of North Carolina At Chapel Hill Scientists Find Breast Cancer Gene Required To Correct Certain GeneticDamage

...ltered cells to three insults- ionizing radiation, hydrogen peroxide and ultraviolet light -- known to injureDNA in different ways. They then compared how well an active "housekeeping" geneknown as DHFR could be repaired in the presence of either functioning BRCA1 ornon-functioning BRCA1. "We found t...

Third Annual Awards For Presidential Green Chemistry Challenge Recognize Innovations

...t and expensive totreat. The new process uses only hydrogen and catalyst to link the two piecesof 4-ADPA together directly--a breakthrough in the field, the company says. Itsyield is 96 percent. Flexsys, the world's largest producer of 4-ADPA,demonstrated the process at a pilot plant in 1993. For Alternativ...

Biochemist Solves Riddle Of Collagen Stability

...n collagen with fluorine, an atom that cannot form hydrogen bonds. The result was a dramatic increase in collagen stability. Raines said the new explanation is based on an inductive effect - that the molecules are organizing themselves through electrostatic forces. The fluorine atoms are soaking up electrons,...

NIGMS Makes First Awards For

...on are in parentheses. A study examining whether hydrogen sulfide (H2S)--a toxic gas that smells likerotten eggs--regulates functions in the brain, internal organs, and bloodvessels. Like the gas nitric oxide, which helps regulate neural function, bloodpressure, and many other processes, H2S is produced in ...

Johns Hopkins Scientists Designing Compounds To Fight Malaria

...h an unpaired electron. The freeradical attracts a hydrogen atom, plucking it away from its bondwith a carbon atom and producing an electron-hungry carbon freeradical. Carbon radicals damage cells inside the parasite bystealing electrons and breaking molecular bonds, making the drugtoxic to the malaria parasi...

Researcher Discovers Plant Genes For Phosphate Uptake

...ransfers phosphate through the membrane along with hydrogen ions," Raghothama says. "We've known about this for a long time in yeast and fungi, but before our work, phosphate transporter genes were not isolated from higher plants." Raghothama and postdoctoral researcher U. Muchhal starved Arabidopsis plants (...

New Materials Remove Corrosive Gas In Coal-Gasification Process

...ty, butthe process generates sizable quantities of hydrogen sulfide, a highly corrosivegas that can destroy pi...gical Survey are developing materialsto remove the hydrogen sulfide and convert it into economically valuablebyproducts. "A typical coal-fired power plant is a...

New Way To Drive Chemical Reactions: Collision Of Liquids At High Speed

...bond ruptures. The fragments canrecombine to form hydrogen peroxide and other highly reactive intermediatesthat can destroy contaminants in the water." Some contaminants can be destroyed directly by the implosive collapseof the bubbles. Other less volatile contaminants can be destroyed throughsecondary rea...

Study: Hydrogen Bonds Aren't Key To DNA Pairing After All

...hymine but lacks the naturalbase's ability to form hydrogen bonds. The findings build upon earlier work b...very closely mimics thymine's shape but can't form hydrogen bonds, DNA-copying machinery nearly always inserts thymine's normal partner, adenine, opposite the m...

Newly Identified Tomato Gene Appears Key To Fruit Softening

...oduced by the LeExp1 gene mayact by disrupting the hydrogen bonds between key compounds in the cell wallmatrix. Once those bonds are broken, the compounds are vulnerable to destructionby enzymes in the plant cell wall. "It might be possible to turn off the gene in any fruit such astomatoes, strawberries or b...

Project Shows Native Bacteria Can Destroy Widespread Pollutant In Groundwater

...amination, the highest cost item in the process is hydrogen peroxide, which breaks down in the water to provid...ett pilot project, that the high concentrations of hydrogen peroxide near the wells kept down bacterial growth and prevented clogging. Also, the bacterial actio...

Purdue Study Aims To Boost MRI Capabilities

...ng magnetic fields to interact with the protons in hydrogen atoms in the patient's body. When the patient enters the imager, the small internal magnetism of the protons partially lines up with the powerful static magnetic field that is always present inside the imager. A radio frequency magnetic field is the...

Molecular Imposter Rebuts Long

...c lacks the slightly charged regions needed toform hydrogen bonds with thymine's normal partner base,adenine. ...posite the thymine-like basedespite the absence of hydrogen bonds. Not only wasadenine inserted opposite the thymine mimic, it was insertedcorrectly nearly all ...

Ten Years of Progress For Superfund Basic Research Program

...obes which can measurethe concentration of oxygen, hydrogen sulfide and other compoundsin the biofilms. This is important, because some of thesecompounds can speed up degradation while others will kill off theorganisms needed to degrade the azo dyes. "We can now probe theblack box of the biofilm," said Loper,...

A Phoenix From A Ring Of Fire Is A Pattern For The Recovery Of Mount St. Helens

...ith the force of more than 10,000 Hiroshima-type hydrogen bombs, killing an estimated 30,000 people and leaving a wide swath of devastation. The recovery from that volcanic upheaval is providing scientists with glimpses of the renewal that can be expected after more recent eruptions, in particular that o...

Newly Discovered Bacteria Produce Magnetic Material

...Oak Ridge National Laboratory (ORNL). Living on hydrogen in mud, these newly discovered bacteria produce ...The Piceance Basin bacteria, which also metabolize hydrogen andpyruvate, were found in groundwater and drilling mud; the Taylorsvillebacteria were present in su...

University of Cincinnati Biologists Find First Terrestrial Ecosystem That Survives Without Sun's Energy

...ve's air bells use theenergy released by oxidizing hydrogen sulfide to provide food forthe cave's numerous and unusual animals. The cave contains 48species, including 33 which are found nowhere else in the world. "Movile is the only cave system known that ischemoautotrophically based, and it contains the only...

From Corn Rootworms To Art, Cornell's Reactor Is At The Core

...nuation. Neutrons, however, are attenuated by the hydrogen in the rootworms," Davis said. "With a neutron beam, we can also see the corn roots and see the behavior of the insects as they are growing. And it's all totally non-invasive." Here is how it works: The TRIGA Mark II nuclear reactor at Ward Labora...

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