Scientists Identify Gene For Sexual Behavior In Male Flies
...y the nervous system," Wassermansaid. "Our data so far suggest that fru is involved in interactionsbetween a handful of specific brain cells that in some way direct thevarious steps of male courtship behavior and copulation," Taylor said."This is an important tool -- here we have a gene that allows us ...Moving DNA Molecules With Magnetic Tweezers
...aid of acostly confocal microscope, which provides far enhancedresolution. By connecting camera equipment to the microscope,Wirtz has been able to collect video and computer images of DNAmolecules in motion. This has allowed him to begin testingtheories developed over the past 30 years. "You see this DNA...Bog Beetle, Misidentified For 85 Years, Is 'Discovered' At Cornell
...aryland. The earliest collected specimen found so far belongs to the American Museum of Natural History in New York City, which was found at Palisades on Hudson, N.Y., on April 2, 1907. The collector was not noted on the specimen label. There are also specimens from the Museum of Comparative Zoology a...Laser Microscope At Cornell Images Serotonin In Live Cells
...lengths below 250 nanometers, a wavelength that is far shorter than the human eye can see or than can penetrate tissue without damage. So quantitative measurement of serotonin in live cells had not been possible. "There are molecules that act like pumps. They concentrate serotonin within a cell. We fo...Researchers Corral Millions Of Microscopic Membranes
...ds to thousands of new proteins are solved. But so far only a handful of these have been membrane proteins," Boxer said. He said that this is an area where the new method may help. Many associated proteins can move freely about on a membrane's surface. In previous work, the researchers have demonstrated ...A Phoenix From A Ring Of Fire Is A Pattern For The Recovery Of Mount St. Helens
...ered glass. But in the later stages, the ash has far more mineral content and is less "pointy and abrasive." The first ash from Krakatau, he says, was almost certainly much more like the ash found shortly after the Mount St. Helens explosion. Even the first, sharp tephra is quickly rendered less leth...New Study Shows Steps Leading To Colon Cancer
...n fruit flies -- genetically similar to humans and far easier to work with -- the Cell paper explains the... that leads to tumors," he said. Fruit flies are far more important in biology and medicine than most people realize, Peifer said. "Two years ago, the ......percent of its Gross State Product to R&D in 1993, far higher than the 2.7 percent national average. Oregon's R&D for 1993 totaled $774 million. The report is being released in conjunction with the Association's 163rd Annual Meeting which has brought more than 5,000 scientists, policymakers, educators a...President's Budget Proposal Cuts R&D By 14 Percent By 2002
... over FY 1997. The Department of Defense (DOD), by far the largest sponsor of federal R&D, would continue its decline of the past several years, dropping by 1.8 percent to $36.8 billion in FY 1998. The DOD's "Science and Technology" budget, which funds nearly 90 percent of the agency's support for R&D a...... single male. She recorded the penguin as being as far as 124 miles from the colony. Although Boersma credits the penguins for their "natural wanderlust," she believes that the huge distances traveled by the birds are due to a scarcity of food close to the colony. Two possible reasons for the depletion o...Newly Identified Tomato Gene Appears Key To Fruit Softening
..."expansins."These expansin proteins, identified so far in cucumbers, rice, tomatoesand the research plant Arabidopsis, work by loosening the plant cell wallsand allowing the cells to elongate during growth. "The plant cell wall is composed of a complex matrix of compounds,"said Jocelyn Rose, a plant bio...Houseflies May Transmit Ulcer Bug
...act of flies." "The adult housefly can fly as far as 20 miles from its source andcan freely enter houses and areas where people congregate, as well asmarkets, stores, and other places where human food is available. It justas freely frequents human and animal excrement alike," he says. Dr. Gr...Stuttering Appears To Have Strong Link To Family Genes, Researchers Say
...hem for early intervention. The geneticlink "is so far the single strongest, consistent, reliable predictorthat we have," Yairi said....New Evidence For Corn's Ancestry Could Lead To Insect And Drought Resistant Crops
...ech greenhousewhere she rents space, Eubanks found far less root damage and far fewerlarvae in her experimental hybrids than occurs in normal commercial corn. "We're using the wes...Merging Physics And Neuroscience: First Evidence Of Self-Organized Criticality In Brain Networks
...elf-organized criticality describes complexsystems far from equilibrium that spontaneously move toward acritical state without external tuning. While the implications of the work remain unclear, theresearchers believe further study could lead to new insights intodisease processes, improved techniques ...Summer Science: Firefly Babies Advertise Their Bitter Taste, UD Researchers Say
...arch butterfly or theyellow stripes on a wasp, are far more typical examples of aposematic display,Tallamy notes. Baby fireflies (Coleoptera: Lampyridae) clearly use light signalsto ward off predators, UD researchers found. This new insight into firefly behavior may serve as an educational tool for botha...Evolution Re-Sculpted Animal Limbs By Genetic Switches Once Thought Too Drastic For Survival
...hsonian Field Station in Belize. "Crustaceans have far more variation than insects in their body plan," Patelsaid. "If that's surprising, it's because people only think of the two or threeclosely related kinds of crustaceans we eat." The researchers used an antibody that labels the proteins made by two c...Where Fossils Fear To Tread: Scientists Follow Genes To An Ancient Ancestor
... distant evolutionary biology. They are looking so far back that there are virtually no fossils or other physical clues to what the Earth's earliest animals were like. But Carroll and others are now finding powerful evidence that an ancient common ancestor - a worm-like animal from which most of...Experts: Public Will Accept Irradiation In Wake Of Meat Recall
... people's memories. Food-borne illnesses are never far from the headlines, making Americans question the safety of their food supply. But consumers are reluctant to embrace irradiation because it is a technology they know little about and don't understand. George Pauli, director at the FDA Office of...... ethics would better prepare girls in ways that go far deeper than the simple maxim, "Just say no." As a social "intimate" history of girls, Brumberg draws heavily from girls' diaries over the past 100 years to glean insights into the hidden history of female adolescence. Integrating information from hi...