Duke Ecologist Says Logging Is Creating 'Mahogany Deserts'
...upply, she says. Then, when the virgin timberbegan running out starting around 1900, foresters assumed they could growreplacement mahogany in same-species plantations. But mahogany plantations in the Americas have not lived up to expectations,she said, mainly because of the shootborer caterpillars that thri...Changing Continental Runoff Patterns Could Change Ocean Circulation
...cean circulation patterns is that the fresh water running out of continental rivers decreases the salinity of the oceans' surface. Natural evaporation in the Tethys sea tended to increase the salinity of the surface water. Circulation in the oceans can be caused by colder water sinking below warmer water...Medicinal Leech May Offer Clues To Neural Regeneration
...orceps to crush the connective, severing the axons running from ganglia to ganglia. The injury was immediately followed by a staining process to detect the presence of active NOS. Their findings showed that the NOS remained localized to the site of the injury -- never staining beyond the pinch -- indicating ...Pinpoint Gene Control Holds Promise For Nervous System Studies
...ice are more activethan their normal counterparts, running around their cages moreand rearing up on their hind legs many times as often as theirnormal counterparts. The genetic alteration also leads to a greater than 10-foldincrease in the amount of NGF in the hippocampus, the region ofthe brain where s...Eating After Exertion May Be A Key To Speeding Body's Recovery
... National Institutes of Health,rats did exhausting running exercises, leaving them with low rates of muscle-proteinsynthesis and low glycogen levels. A follow-up meal of amino acids (froma high-protein liquid) and carbohydrates (a sugar solution) allowed therats to recover to normal rates of muscle-protein s...Everyday Technology Underlies First DNA Computer Logic Gates
...that serve as answers to computations. Rather than running the DNA through a slow gel electrophoresis, researchers could add labeled strands to a DNA chip, which consists of hundreds of squares containing different known strands of DNA. The added DNA would quickly bind to the strands in the square contai...Smoking Mice Lead To Emphysema Breakthrough
...of theirroutine. "After a while, they just started running into the chambers," Shapirosays. "They loved it." To Shapiro's knowledge, his is the first smoking chamberever designed for mice. Six months later, all of the normal mice had inflamed, over-inflatedlungs ? the hallmarks of emphysema. The migh...Biological Clocks No Longer Found Only In The Brain
... on and off, demonstrating that lots of clocks are running throughout the fly, independently of the brain." Under normal light/dark conditions, the clock genes rhythmically luminesced in each of the segments -- head, thorax and abdomen. The clock genes were especially conspicuous in chemosensory cells at t...Tiger Beetles Go Blind At High Speeds
... has a body length of only 10 millimeters, and its running speed of 0.53 meters per second becomes 53.87 body lengths per second, or relatively 10 times faster than our best human sprinter. "And the species of tiger beetle I work with ( Cicindela repanda) is not even the fastest," explained Gilbert. "Th...Detective Work Uncovers New Tick-Borne Disease In North Carolina And The Southeast
...cropped up in the middle of the state. Ticks were running amok in an outdoor camp for girls. In two months,324 ticks were removed from the residents and staff and some of the biteswere followed by a circular red inflamed ring, akin to the rash seen inpeople bitten by ticks infected with the Lyme disease bac...Ant Pheromone May Aid Alzheimer's Patients
...off on a mission, a primitive ant practices tandem running -- that is,if it can persuade one other ant to come along. -- SENSITIVE SENSORS: Pheromone receptors and the biological signalingapparatus that go with them are as sensitive as the finest analytical-chemistryinstruments. Cornell researchers test ...Short-Course TB Prophylaxis Effective In HIV-Infected Individuals
...ersonnel and administrative costs make running a 12-month, daily treatment program very expensive. Although RIF and PZA are more expensive than INH, Dr. Gordin says implementing the two-drug short-course regimen likely would be far less expensive and thus an attractive ...Chromosomal Abnormalities Key For Prediting Leukemia Outcome
COLUMBUS, Ohio -- One of the longest running studies to follow leukemiapatients has confirmed that chromosomal abnormalities seen in many of thesepatients can help determine treatment and predict the likelihood of cure. The study is a 15-year follow-up of 628 patients with acute myeloidle...Liquid Crystals Light Up Simple Chemical Test
...uid crystal and enough ambient light for theperson running the test to read the result. The test doesn't even requireelectricity. "The nicest thing about this approach is that the procedure usedto perform the detection is very, very simple, " said Nicholas Abbott,the UC Davis associate professor who led the...Caribbean Lizards Evolve Independently
... trunks in the rain foresthas long legs that favor running and jumping quickly; another, which lives ontwigs in the rain forest canopy, has short legs, letting it creep on the smallerdiameter living surface. These are extreme examples of the different types oflizards, and the types are called habitat speci......ome place to go. Fast is "pushing the envelope of running but still walking, such as a woman who is late for a meeting and rushing in high heels," says Kramer. In her model, she compared the three-foot-tall Lucy, who weighed about 70 pounds and had a stride that covered a little more than three feet, with a...How Did Life Begin? Biochemical Evolution On Chemical Surfaces
...resembling zeolites, porous crystals with channels running throughthem. Most zeolites are hydrophilic--water-loving--and tend to absorb waterfrom their surroundings. But certain synthetic zeolites are organophilic,preferentially absorbing organic materials out of water. A naturally occurring orga...Mr. Ples Throws Scientists Into A Tizzy
... a fossilized skull." Tobias, who has been running the dig at Sterkfontein for more than 30years, says, "Mr. Ples is a magnificent specimen that extends our understandingof the range of brain sizes in these emergent African 'missing links.' Thisskull was the last major discovery by Alun Hughes, a rem...UF Researcher's Innovative Fence Helps Control Sand Flies
...verall sand fly population after the fence hasbeen running for months or even years. Sand flies infest all of coastal Florida. Day said many control strategieshave been tried against sand flies, also known as no-see-ums and wingedteeth, but all have failed because of the insects' complex biology. The carbon ......st them. In short, sex in fruit flies is a running battle in which males haveevolved to fertilise as many eggs as possible, while females have evolved toprotect their own health. "They can antagonistically coevolve just like predatorand prey," says William Rice of the University of California at Sant...