Tag: "reactivity" at biology news

Chemists Compute Answers To The Origin Of Gout

...ding insights into the basic molecular make up and reactivity of chemicals - and for dangerous or sensitive species, modelling is completely safe.Other projects currently under way at the new group are: A study of how nitrogen gas binds to natural enzymes and is converted to fertiliser so effortlessly when, f...

Spinach Enzymes Neutralize Explosives

...ts, fungi,bacteriaand buttermilk, have an apparent reactivity to degrade explosives. These nitroreductase enzymes are mixed with a buffer solution and a reductant, such as lacticacid or ethanol. In that mixture, the reductant reduces the enzymes. Then those reducedenzymesfurther reduce, or digest, explosives ...

UV Skin Damage In A Different Light

...d of the ultraviolet A range, where the molecule's reactivity was thought tobe harmless. They discovered that when this type of light strikes t-UA, it zapsthe molecule into an excited "triplet" state that sparks the creation of oxygenradicals. Oxygen radicals are chemical rogues blamed not only for premature a...

American Heart Association Announces Top 10 Research Advances For 1998 -- Gene Therapy Among The List

...k of nitric oxide in the bloodstream, or a lack of reactivity by the blood vessels to nitric oxide, can narrow the vessel, thus raising the blood pressure. High blood pressure, which affects 50 million Americans, is a major risk factor for heart disease and stroke.In the June, in Circulation: Journal of the Am...

NSF's Highest Honor For New Faculty Fosters Integration Of Research And Education

...troscopy will be used to examine the structure and reactivity of biradicals, carbenes, nitrenium ions and the excited states ofketones and enones. The experimental approach, coupled with computationalmethods, will enhance basic understanding and will address specific unresolved issues in reactive intermediate ...

Study Suggests Maternal Stress And Stress Hormones May Influence Fetal Brain Development In Utero

...denced by their relationship withmeasures of fetal reactivity and learning. The effects of early environment ondevelopment are believed to be like those of a double-edged sword, whereinoptimal environments may produce beneficial effects, and hostile environments,such as that effected by prenatal stress, may pr...

New tool provides major advance for understanding chronic Lyme disease and other illnesses

...lone to B. burgdorferi peptides was strongest, its reactivity with multiple human proteins indicates that these T cells may be continuously stimulated either by the bacterium or by the human proteins, possibly leading to autoimmune tissue damage. The report's other co-authors are Dr. Bernhard Hemmer (now at the...

Palo Alto researcher receives national award

...uilding one part of it in a laboratory without the reactivity of another part getting in the way?" Khosla's solution is to let nature do it. He and his group have developed ways of genetically "hijacking" the biochemical pathway a bacterium naturally uses to make the antibiotic erythromycin, for example. By r...

Breakdown of penicillin by resistant bacteria elucidated

...antibiotics, the chemical principles governing the reactivity of penicillin that we have found are fundamental for designing compounds of pharmacologic importance," says Makinen. Penicillin-resistant organisms are currently among the most important sources of hospital-acquired infections. Some bacteria have ...

Biologists find Peruvian plants inhibit growth of TB bacterium

...nd his fellow researchers identified the amount of reactivity present in each of the samples against various dis...unds. Lewis believes he found such a high anti-TB reactivity across the broad range of plants because the plants have shared sensitivities that "allow secondary ...

Binge drinking: a dangerous rite of passage

...e brain as well as changing the individual's later reactivity to alcohol." Although White cautioned against generalizing from a small sample of rats to the entire human population, he noted that the findings are consistent with previous research on alcohol abuse during adolescence. McKinzie concurred. "The few...

The immune system may be involved in the susceptibility to childhood attention deficit hyperactivity disorder (ADHD)

... may bear direct relevance to altered dopaminergic reactivity implicated with the pathophysiology of ADHD. Moreover, IL-1 has been also shown to modulate the release of dopamine and norepinephrine in several brain regions. Genetic variability in central modulation of transmitter activity may similarly contribut...

Future advances of 20,000-year-old coatings technology detailed in upcoming Science magazine

...al units and give them structure by changing their reactivity with each other. We have demonstrated that this technology breakthrough will allow us to further increase the solids content of coatings to more than 80 percent," he said. In 1923, DuPont provided consumers their first color options beyond black fo...

UW scientists find genetic pathway to potent anticancer agents

...l structure (first elucidated in 1985) and extreme reactivity have made them difficult to synthesize and use through conventional means. The discovery of the genes that produce these agents means that enediynes can now be produced in quantity and their characteristics manipulated to make them far easier to use ...

Evidence suggests that standard smallpox vaccine offers long-term immunity

...htly lower level. "It is striking that the loss of reactivity over more than 35 years is very low in individuals with a remote history of vaccination compared to recently vaccinated individuals," the authors wrote. Quantitatively, 4.8 percent of CD8 cells in individuals vaccinated more than 35 years ago reacte...

Identification of the first gene in posttraumatic stress disorder

...us studies found correlates of abnormal biological reactivity of brain endocrine and autonomic nervous system, a... PTSD. Previous studies showing abnormal dopamine reactivity among PTSD patients, and stressed animals, have suggested that stress-induced alterations of brain d...

INEEL competes successfully for DOE EMSP funding

...y that soil moisture content controls the chemical reactivity of contaminants in the vadose zone (the saturated area between the surface and the water table). And researchers focused on metals in the subsurface will conduct two projects. The first will study feasibility of using metal-reducing microbes to cre...

Symposium on how 'nature and nurture' impact child development

...ing, of fearfulness to novel situations, autonomic reactivity and cortisol production. Stephen Suomi, PhD: (301-496-9550; ss148k@nih.gov ) Chief, Laboratory of Comparative Ethology, NICHD, NIH "How Gene-Environment Interactions Shape Social and Emotional Functioning in Rhesus Monkeys" Rhesus monkeys display em...

Pacific Northwest chemist wins national award for computer-based research

...es around fluorine, a highly reactive element. Its reactivity means it can help assemble complex compounds as varied as refrigerants, pharmaceuticals, rocket fuels and agricultural chemicals, but at a price: Fluorine's reactions can be unpredictable. One of Dixon's achievements is a new energy-based scale that ...

Experimental Biology 2003 meets in San Diego April 11-15

... refers to the negative effects of the body's high reactivity to nitric oxide. Other examples of APS presentations include transgenic models of heart failure therapeutics, physiology of high altitude decompression sickness, and why brain remodeling underlies the success of behavioral therapies for motor dysfu...

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