Tag: "fourth" at biology news

Salamanders may one day monitor degradation in small streams

... to manyaquatic animals, including amphibians. The fourth stream type is not acidic butflows through a watershed fragmented by urbanization or agriculture. Theresearchers sampled each study stream by searching 4 square meter plots thatincluded both wet and dry bank area. "Three of the seven species wer...

European and U.S. attitude differences towards GM foods explained in the 16 July 1999 issue of Science

...ms thatcontrol plant growth and development. And a fourth discusses the need forsustainable biotechnology that benefits developing countries. Finally, the issuealso includes a special news report about efforts to genetically modify cropsgrown in specific areas or regions of the world, and an editorial that ...

Air pollution hits children with asthma hardest, USC study finds

...nCalifornia. The study investigators recruited 150 fourth graders, 75 seventhgraders, and 75 tenth graders from each of the 12 communities to participate inthe study. The parents of each child were asked to fill out a questionnaireabout their child's chest symptoms in the past 12 months. They were also aske...

Blueberries: New thrills for those over the hill

...ble extracts with potential antioxidanteffects. A fourth group of animals did not receive the special diet. The groupof animals that received the supplements showed some improvement on keyindicators of age-related decline. The study was conducted by James Joseph, Ph.D. of the U.S. Department ofAgricultu...

Virtual reality training tool pits emergency rescue teams against computerized terrorist attack

...he airborne bio agent used in thesimulation. And a fourth appears to exhibit the symptoms of SEB exposure, butcloser examination shows him to be suffering from psychological shock.During a simulation, the player must triage, diagnose, and attend to the medicalneeds of each casualty. Visual indicators--like ...

Scientists discover addition of new brain cells in highest brain area

...erestingly, there was no sign of neurogenesis in a fourth area, the striatecortex, which handles the initial, and more rudimentary, steps of visualprocessing. That contrast suggests that neurogenesis may play a role inperforming higher brain functions. Virtually all theories of learning and memoryhold that ...

CU studies suggest exercise protects body against negative effects of stress from brain to cell

...perienced, active mountain climber's body." The fourth study headed by CU doctoral student Albert Moraska was designed to understand how physical activity mitigates immunological responses to stress at the cellular level. The researchers measured white blood cellular division, cytokine release (proteins...

Tracing the evolution of sex chromosomes

...mpany with the ancestors ofkangaroos. Finally the fourth and most recent strata differentiated 30 to 50million years ago, shortly after our ancestors parted company with the ancestors of lemurs. The Science paper builds on study published last year by the Page lab thatproposed a pathway for X-Y gene evolu...

Heat can help maintain muscle mass in immobilized limbs, study shows

...and recived no heat treatment; and the rats in the fourth group were treated with heat at 106.9 degrees Fahrenheit and had the weight removed from their hind legs. After eight days of hind limb suspension, which mimicked weightlessness and prevented muscle use, researchers measured the degree of muscle a...

Hopkins researchers identify neurologic problem associated with motor disorders in Huntington's disease

...ntellectual deterioration. Symptoms appear in the fourth or fifth decade of life, and then progress steadily during the succeeding 10 to 20 years. Death follows, and there are no effective treatments available. The study, directed by Christopher Ross, M.D., Ph.D., professor of psychiatry and neurosc...

Revised model of protein-drug interactions could make job of drug designers a little easier

...eventing binding from one direction. Often it is a fourth interaction in the active site, for example with a metal ion, that turns the encounter into a four-point landing. "We usually thought there was only one binding mode at an active site of a protein," said Mesecar. "This shows you can have at least tw...

Researchers find structure of enzyme that catalyzes 78-million-year reaction

...eedings of the National Academy of Sciences, and a fourth paper has been accepted by the journal Biochemistry. The late Dr. Mary Ellen Jones, who led UNC-CH's biochemistry department from 1978 to 1989, carried out the most significant early work on the OMP enzyme, he said....

Bacterial strain may help clean up harmful industrial waste

... which work together as a team, are activated by a fourth protein. "They are all needed to do the work," he says. "Just like a car needs an engine, brakes and tires to work." Coschigano also has detected a fifth, previously unidentified gene in the bacterium, but doesn't know what role -- if any -- it plays...

New science resources available from the ESA

...r ecosystems. The Ecological Society of America's fourth edition of Issues in Ecology review observational and experimental ecosystem studies in North America and Europe. A panel of twelve scientists conclude that ecosystem productivity and stability decreases with a reduced number and variety of species i...

Smoking during pregnancy found to increase risk of cleft lip and palate

...ate are fairly serious birth defects. They are the fourth most common congenital abnormalities, affecting about one in 700 newborns. As their names suggest, the deformities are marked by obvious gaps in either the lips and nose or the roof of the mouth, due to incomplete fusing. Besides affecting a child's ...

Dietary changes don't prevent recurrent polyps, eight-center study shows

...k for recurring polyps at the end of the first and fourth years. The participants seem to have followed the diet. The investigators report that the dietary group consumed 9.7 percent fewer calories from fat than the control group and increased their fiber intake by nearly 75 percent. Servings of fruits a...

Memory, forgetfulness help hamsters time breeding

...wild," Prendergast says, noting that 13 weeks is a fourth of a year or about one season. "Any day length information that the hamster learned more than 13 weeks ago would lead it to make the wrong 'decision' about an intermediate day." Prendergast, who now works in the labs of Hopkins neuroscientist Randy ...

PRAECIS announces positive results for abarelix depot-M in two pivotal Phase III clinical trials

... the United States Food and Drug Administration by fourth quarter, 2000." "These positive clinical results validate PRAECIS' core technology for drug discovery and our ability as a company to bring pharmaceuticals through the drug development process. We look forward to advancing our other clinical progr...

UCSD researchers find genetic key to puzzling congenital disease

...ed areas in a swirled ("marble cake") pattern. The fourth stage involves scarring, and is seen in adolescents and adults as pale, hairless patches or streaks. Once most patients reach adulthood (late teen and beyond), the skin changes fade and may not be visible to the casual observer. Girls born with IP...

Lasers to the aid of embryos

...bies through pregnancy, using amniocentesis in the fourth month, and undertook physical examinations at birth and after one month. "We did not find any higher risk of congenital malformation or chromosome abnormalities. Our study shows that lasers provide the quickest, most effective and safest hatching te...

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