Duke Ecologist Says Logging Is Creating 'Mahogany Deserts'
...s to unravel the mystery. Hurricanes periodically blow through Yucatán forests, she said. "Theyknock down some trees and branches, but most of the trees survive."However, the fallen debris provides ample fuel "that ignites in thenext dry season," she added. "And only 15 percent of the treessurvive...Behemoth Animals May Follow Same Extinction Patterns
...n years." For the proboscideans, the final death blow will probably be by the handof humans, but these elephant-like animals also suffered a gradual declinein species number over the past 5 million years and only now approach extinction. Although dinosaurs and proboscideans ruled at different times, pl......e as viral production factories. And, in a further blow to the body'sability to defend against the infection, Vpr actively induces apoptosis inneighboring immune system cells that have not yet been infected, known as CD4 Tcells. It also interferes with the ability of those cells to proliferate. Thenew fin...Remote Cloud Observatory Tracks El Niño Changes
... events. Normally the Pacific trade winds blow from east to west and push warmwater across the Pacific Ocean and allow colder water to move in from the north,south and below, along the west coast of North and South America. When El Niño begins, the trade winds slacken and the wate......sibility that windy sandstorms delivered the fatal blow tothe dinosaurs of Ukhaa Tolgod. To corroborate this, the team reviewed researchon the travel literature of Central Asia and Arabia to see if there were anymodern-day accounts of animals buried alive in sandstorms. The research did notrecord any su...Invasive Weeds Pose Major Threat To American Landscape
..., aggressive non-native species often deal a harsh blow to rare species-- about two-thirds of all endangered species are threatened by non-nativespecies, the report said. As the native plant species decline, the animals thatdepend on them for food and habitat may also be jeopardized. The book was dev...As A 'Carbon Sponge,' Iron-Poor Coastal Waters Can't Always Do The Job, NaturePaper Shows
...inents, deserts also expand, allowing strong winds blow iron-rich dustacross the planet. Estimates of the ocean's productivity during ice ages andinterglacial periods-such as the current era-may need to be reevaluated, henotes, because some models are based in part on samples of opal pulled fromdeep-sea s...Security Code Helps Immune Cells Attack Foe And Spare Self
... harmful microbes. Otherparts of the immune system blow an invader's cover by posting fragments of itsproteins on its surface or on the surface of a cell where it's hiding out.Helper cells read these fragments -- called antigens -- like cops checking out alicense plate. If the plate is foreign, they make ...Study Suggests Weekly Hurricane And Rainfall Patterns Are Linked To East Coast Pollution
...ges on the storm are apparently helping hurricanes blow themselves out. Thedifference is as high as 10 miles-per-hour wind speed, downgrading the stormalmost as much as a Saffir-Simpson Scale category, meaning that if a hurricanewere to hit on Tuesday or Thursday, it might be a Category 3, but if it were ...Researchers Make Breakthrough In Gene Transfer
...on offoreign proteins in a noncytotoxic manner may blow new wind into the sails ofour gene therapy enterprise." This new type of vector might eventually be usedto deliver DNA vaccines, he also suggests. Rice and colleagues worked with Sindbis virus, which produces fever,headache and musculoskeleta...UC Scientists Search For Alternatives For Methyl Bromide
...e under study shoots out air at a high speed to blow dirt away from tree roots, allowing scientists to see the roots -- and the fungus on infected trees -- underground. Exposing the roots may alter the growing conditions enough to kill off the fungus. For more information, contact Shackel at (530...Future Of West Tied To Saving, Not Extracting, The Land
.... "A lot of people expected the town to dry up and blow away," Freudenburg says.But within a few years of the plant closing, the town's population was growing.People moved there because of its mountain scenery and quality of life, andrelatively lower costs than nearby Steamboat Springs. Freudenburg says t...Major Set-Back To Ozone Layer Recovery
...located inthe path of the 'roaring forties', which blow unpolluted air across the SouthernOcean. CSIRO's research into ozone depleting chemicals is being done incollaboration with the Co-operative Research Centre for Southern HemisphereMeteorology. A graph showing the rise in the atmosphere of halon-1211 ...Crack open an egg and cure a disease
...anies that discovered them. "It's a shame we can't blow our horn a bit more," he says....Monsanto's modified soya beans don't agree with the heat
...es of up to 40 per cent. This could be a serious blow to the St Louis-based company, which sees Brazil and other Latin American countries as major markets for its soya beans. "It has the potential to be quite a problem," says Bill Vencill of the University of Georgia in Athens. Vencill examined the ef...Detroit researcher receives national award
...scribed himself as "one of those kids who tried to blow up the basement." He added, "Later, as I understood its puzzle-solving aspects, I found it an interesting challenge." The James Flack Norris Award in Physical Organic Chemistry is sponsored by the Northeastern Section of the American Chemical Society...Parkinsons disease is more than just a brain disorder
...ponses to the Valsalva maneuver, in which patients blow into a tube, producing temporary decreases in the amount of blood pumped by the heart. People with a fully functioning sympathetic nervous system are able to compensate for the decrease in blood output by the heart because the brain responds by d...Science's Top 10: genome sequencing named top scientific advance of 2000
...ells, New Tricks: Scientists delivered a decisive blow this year to the once-canonical notion that adult cells are wedded to their identities. In studies with mice and human transplant recipients, adult cells from certain parts of the body re-made themselves into an impressive variety of other cell types......w into waste-water ponds, and wash up on shore and blow out again", says Ronald Warren, an independent environmental monitoring expert who is contracted to scrutinise radioactivity at INEEL. "The tumbleweeds blew against the [2-metre high] fence where they built up, forming a ramp other weeds could climb ......ummer, air currents coming from the Gulf of Mexico blow in from the south, passing Tucson en route. During winter, winds originate over the Pacific Ocean, traveling over the Sierra and Cascade Mountain ranges before reaching Phoenix. The particles carried on these winds are believed to be the source of mo...