Duke Geologists Explore Alternative Way To Measure Ice Age Sea Bottom Temperatures
...reconstruct how bottom sea water temperatures have changed during and between past ice ages. In an article pu...e ratio of calcium to magnesium in seawater is not changed by the buildup of glaciers. In fact, this ratio is thought to have remained unaltered over at least ...Computer Program For Quicker, More Detailed Mapping
...yside. "We built a car around an engine, and then changed the engine,"said McKusick. McKusick and colleagues modified the original program in steps, graduallyreplacing the very precise, but time-consuming and expensive parts. At everypoint, they evaluated its success to make sure they were not sacrificinga...Nutrition Study Reshapes Strategies For Athletes
...veloped at The University of Arizona in Tucson has changed the training regimens of a number of America's elite women athletes, and may eventually reshape strategies for nourishment during competition. Seven of the top eight spots on the UnitedStates women's heptathlon team were filled by women who have bee...Green Glow: Not Only For Halloween
... a second experiment, the researchers deliberately changed one amino acid in contact with the green pigment, in hopes that change would make GFP glow yellow, rather than the green of the original protein. It worked, giving biologists a new tool to track the location in a living cell of two proteins simultan...Six-Year Drilling Project to Uncover One Million Years of Earth History
...ailed record of how the Earth's magnetic field has changed in the past, and test the extraordinary but widely held view that Hawaii exists because of a fountain of hot rock material coming from 3,000 kilometers deep in the Earth." The project will produce a continuous 14,500-foot sequence of samples ...Bacterial Protein Structure Hints At Mechanism Of A Class Of Premature Aging Diseases
...g mutations at the molecular level, the scientists changed oneamino acid in RTP to test their hypothesis that it interacts with a specificregion on the helicase. "Identifying the corresponding proteins from a human system andthen finding a mutant protein will lead to understanding of the diseaseprocess...Duke University Students Devise Devices For The Disabled
...remains so -- reported his mom, Janeen. "Theslider changed things for him by allowing him to stop the ball better, movefaster, get the ball more quickly out of the net, cover more area, and 'lookmore like a real goalie,'" Mrs. Delimata said in an e-mail interview. "And the slider will aid him therapeuticall......mortality, during a specific period of life can be changed bymanipulating environmental conditions, in this case through diet,"said Carey, an authority on insect demography, who for several years hasused the Medfly to study life-span theories. "It was previously thoughtthat the mortality curves for most spec...Corn Byproduct Shows Promise As Biodegradable Packaging Material
...ng weight ratios. While the structureof the sheets changed according to the ratios, the sheets with the zein-palmiticacid mixture showed a substantially stronger tensile strength. Without the plasticizing acids, zein sheets were brittle and had higherwater-absorption qualities. Zein sheets without the fatty...Ozone 'Chat Room' Provides Real-Time Air-Quality Research
... on acid rain and haze research. "For one, it has changed EPA's emphasis from command-control to consensus-building. Throughout its existence, EPA came up with regulations and enforced them with little input from others, least of which those who face the biggest sanctions. By building consensus beforehand...A New Biochemical Link Established Between Stress, Sex And Dominance
...s of territory. For the first few weeks, ownership changed frequently and so did the males' bright colors, switching on or off depending on which male perceived himself to be the victor. Perhaps most important, Fernald said, was the fact that no females elected to lay eggs during this period of social...Photocatalytic Air Cleaning System Promises To Help Allergy Sufferers
...ventional techniques using filters, which must be changed and disposed of. "With this system, contaminants are destroyed rather than transferred. No toxic chemicals are employed," said Goswami. Allergy and asthma suffers may find great relief once dust mites and mold spores are eliminated from the a......s and other human populations. ThePima, whose diet changed when they were put on a reservation at the turn of...t of the Pima have the disease by age 35, whichhas changed the tribe's basic body type from thin to obese in a century. Taylor and Diaz's study was sup...Corn Rootworm Changing Behavior, Posing New Threat To Crops
... As the major insect pest of corn, rootworms have changed their behavior,laying their eggs in soybean fields instead of corn. The conclusion isthat crop rotation itself has selected for a rootworm strain that circumventscrop rotation. By laying their eggs in soybean fields, the female rootwormbeetles ensu......paleogeography and paleoclimate of the world as it changed over the past 500million years, had that kind of information at his fingertips. “I get these kinds of requests all the time,” said Rowley,“so at first I didn’t think about it too much. But when theyasked to me take a closer look ...Small-Scale Fires Key To Understanding Forest Structure
... "In the 20th century, fire suppression has changed the density andspecies diversity of these forests,..., saplingsand seedlings. Fire suppression has also changed the forest composition frommostly pine, which are fire tolerant, to firs which are more shade tolera......T. In addition, the Food, Drugand Cosmetic Act was changed this year in a bill sponsored by Senator Stevens,Chair of Appropriations, that directs the FDA to design a new review andregulatory approach that takes into account the special properties of PET, andthat while this takes place, the US Pharmacopoeia w......happened," says Kramer. "Probably the environment changed and food became less abundant. So it became necessary for Lucy's descendants to have a larger day range. Basically leg length increases as animals need to go faster or farther. There is evidence that from 2.8 million to 1 million years ago the clim...EPA Should Redirect Some Research on Toxic Airborne Particles
...and a variety of othersources. The standards were changed after several epidemiological studies foundassociations between exposure to the particles and serious health consequences,including the exacerbation of asthma and other respiratory tract diseases --which in some cases were leading to premature deaths...From The Home Front To The River Front, USGS Updates Water-Quality Information
.... Concentrations of nitrogen and phosphorus have changed over the past 10 to 20 years in the rivers where they flow into Chesapeake Bay. The amount of nutrients delivered to Chesapeake Bay is dependant upon the amount of rainfall. For example, 1996 was an exceptionally wet year and flood waters from thes...