Study Examines How Mechanisms Evolve To Regulate Bee Development
...ngs of the NationalAcademy of Sciences. Co-authors were Robinson, an internationally recognizedhoney-bee expert, and Tugrul Giray, a doctoral student at the U. of I. inentomology. Honey-bee scientists have a general understanding of how the level of juvenilehormone affects the well-known division of labo......s carcinogenic compounds in their bloodstream, and were at higher risk of developing bladder cancer, a dis...case-control study of the disease. Extensive data were gathered on medical and reproductive history and blood samples were collected for DNA analysis. Res...Animal Studies Indicate Aging Brain Responsive To Estrogen
...male rats that had their ovaries removedand, thus, were making no estrogen. The researchers divided the rats intothree treatment groups -- those receiving no estrogens, long-term chronicestrogen doses, or a single acute dose of estrogen. After the treatments, they performed microscopic studies that allow...Medicinal Leech May Offer Clues To Neural Regeneration
...in human spinal regeneration. Details of the study were presented Nov. 21 at the annual meeting of the Society for Neuroscience. "Our study shows that NOS in the leech is activated at the site of injury within minutes after axons are severed, and it remains active well beyond 48 hours after the injury," S...Impact of Meteorites, Drop in Sea Level Caused Mass Extinctions 65 Million Years Ago
... In addition, about 25 percent of the extinctions were due to factors that would have occurred regardless..." "Some scientists thought the extinctions were due solely to the impact of the asteroid or comet, others thought they were due to the sea level cha......stampedes of mole-rat recruits, and the biologists were ready. They had constructed their plastic labyrin...s. When tunnels through which scouts had traveled were replaced with clean tunnels, the recruits were confused. Recruitment behaviors to share newly discov...Plants Have Future As Environmental Clean-Up Agents
...00. But the aesthetic qualities of bioremediation were also anattraction. Feyerharm said the planting of the trees will helpcontrol erosion problems and attract wildlife, something traditionaltreatments wouldn't do. "We think this a no lose opportunity for us," Feyerharm said. Erickson and Davis, along...KU Researcher Eyes The Rain Forest Through The Trees
...dvanced Research program. "In some countries there were incentives to cut down the forests and convert the...aturally. According to Terwilliger, some officials were hoping to cash in on pulp and paper needs by planting the exotic trees. However, the plan didn't bea......he hears and is asked to do." The children were given a number of verbal and non-verbalperformance...nes, enabled researchers to determine which skills were linkedprimarily to genetics and which could be attributed primarily to a sharedenvironment. ...Bacterial Protein Structure Hints At Mechanism Of A Class Of Premature Aging Diseases
...py techniques." Collaborators on the project were Adhar C. Manna, Karnire S. Pai, DirksenE. Bussiere and Christopher Davies....Researchers Develop Model Using Birds As Indicator Of Wetlands Health
...t. "As soon as the habitatwas available, the birds were there," said Styer. Coleman believes this type of index will be a useful tool toprovide a quick comparison among wetlands as well as a way tomonitor the health of one particular wetland over time. As part of his Ph.D. research, he also hopes to refi...Two Long-sought Diabetes Gene Found
...ow and when other genes are turned on or off. Both were known to be active in regulating gene expression in the liver, kidney and intestine. "This surprising finding means we have to quit thinking of diabetes purely as a defect in glucose metabolism and starting thinking of it as possibly a defect in gene...No Such Luck: Nitrogen From Air Pollution Unlikely to Moderate Global Warming
... native "warm-season" prairie grasses, the results were very different in fields dominated by non-native "...din found that more than half of the plant species were lost across the nitrogen addition gradient, with the greatest losses occurring at low levels of nitr...Optical Microscopy Shines Light On Biology
...que is relatively young. Although the fundamentals were mentioned in a series of letters between Edward A. Synge and Albert Einstein, near-field optical microscopy didn't become practical until 1991. Dunn has been active in the field since 1992, when he carried out a postdoctoral fellowship with X. Sunney...Siblicide In Nature: Study Of Galapagos Seabird Finds Death Can Ensure Species Survival
...t of normal body weight. Blue-footed booby chicks were put in masked booby nests and vice versa, to determine whether parents, or offspring, or both, controlled the siblicide. In masked booby chicks raised by blue-footed booby parents, siblicide happened in 80 percent of the nests, compared to the norma...Methane Deep In Ocean Crust Could Feed Chemical-Hungry Microorganisms
...en calculate the temperature at which those fluids were once circulating through the crust....Disease Resistance Mechanism Identified in Plants
...roducts of the resistance and the avirulence genes were interacting directly. "These findings set the stage to allow us to genetically engineer disease-resistant crops," Brian Staskawicz, a biologist at UC-Berkeley concludes....Mechanism For Disease Resistance Identified In Plants
...roducts of the resistance and the avirulence genes were interacting directly. "These findings set the stage to allow us to genetically engineer disease-resistant crops," Brian Staskawicz, a biologist at UC-Berkeley concludes....Urbanized Watersheds More Sensitive To Climate Change
... in 1980 had 39 people per square mile. "There were some small effects on stream flow in rural areas, but nowhere near what we see in urban areas," says De Walle. "In general, there is some decrease in stream flow with increase in temperature in urban areas, but in the Northeast, this does not seem...Pinpoint Gene Control Holds Promise For Nervous System Studies
...oks is first author of the paper.Also contributing were scientist Nariman Panahian, researchassociate Bhas...that kept the genes turned off. Then, whenthe mice were several months old, scientists injected a viralvector that shuttled into the cells an enzyme that sn...