High Testosterone Level May Lead Male Junco To Stray From Mate
...d. These results are helping scientists learn how biological factors --such as hormone levels -- influence the reproductive success of birds, Raoufsaid. The research used dark-eyed juncos, a sparrow-sized species of bird thatcommonly breeds in Canada and mountainous parts of the United States. Thisstudy invol...At Life's Most Sensitive Stage, Embryos Cope With Stress
...s asprotection from environmental heat stress, the biological consequences of heatshock protein expression in early embryos, and the unpredictability oftemperature stress in the intertidal zone," Hofmann said. She said the embryos may have other protective factors as well that scientistshaven't discovered yet; ..."Doctor Watershed" Named AAAS Fellow
.... As the nation's largest water, earth, and biological science and civilian mapping agency, the USGS works in cooperation with more than 2000 organizations across the country to provide reliable, impartial, scientific information to resource managers, planners and other customers. This information is gat..."Discovering Biological Diversity" Is AAAS Topic For USGS Manager
...ng internationalinformation access on questions of biological diversity. USGS... As the nation's largest water, earth and biological science and civilian mapping agency, the USGS works in cooperationwith more th...Summary Of USGS Presentations And Activities, AAAS, 1998
...information access to those focused onquestions of biological diversity. Cotter will speak about Access to Biol...I), a computerizedconnective linking the wealth of biological information resources availablethrough the Internet. As the nation's largest water, earth, and biolo...Emerging Field Of Industrial Ecology
...ental impact and more closely resembles a balanced biological ecosystem,Graedel said. He gave several examples of ways to design materials and products thatdo more with less and how to recover materials through recycling. He al...Human Cloning: Grappling With Reality Penn Bioethicist To Explore The Facts Behind The Hysteria
...h the issue of imposing knowledgeabout the clone's biological fate without the prior, informed consent ofthe clone demand attention before any additional thought is given topursuing cloning technology. Editor's note: Dr. Caplan can be reached by calling 215-898-7136 or bye...... by amphibian biologists. They laid out the basic biological road mapfor the study of regeneration." Dr. Heber-Katz's discovery of the healer mouse occurred five years ago, when herlaboratory was using different autoimmune mouse models to study multiplesclerosis. As a way of painlessly and permanently separat...Researchers Take Major Step Toward Cracking Ebola Code
...el, M.D., Ph.D., professor of internalmedicine and biological chemistry at the U-M Health System and an investigatorat the Howard Hughes Medical Institute, reports that the virus employs aglycoprotein (a protein with sugar attached) in two different ways to disablethe immune response and attack certain cells. S...Phase Out Planned For One Of Top Five U.S. Pesticides, Plant Doctors Respond
...light) Electrical heating of soil Incorporation of biological control organisms What ever the alternative, "The loss of methyl bromide certainlypresents a significant challenge to American agriculture,"says Bill Thomas, EPA. "Currently some 75% of the methylbromide used in the U.S. is applied to soils prior t...Females' Siren Song Initiates Courtship Duets In African Frogs, Columbia Biologists Find
...tem, was conducted byDarcy B. Kelley, professor of biological sciences; Martha L. Tobias, seniorresearch scientist, and Sandya S. Viswanathan, a graduate student in neurobiology and behavior, all at Columbia. A female frog faces an urgent problem: there is a span of only about 24hours in which her egg...New Sensor Will Detech Chemical And Biological Pathogens At Incredibly Small Doses
...1991 Persian Gulf War when thefirst real threat of biological warfare was heralded, dozens of pathogens wentunde...he military. To detect many of these weaponizable biological agents (WBA), a sensor must beable to identify a pathogen at a measurement of parts per trillion. Te...Candidate Regulator Of The Temporal Component Of Neurotransmitter Release Identified
... vesicle fusion. Using a combination of molecular biological and physiological techniques, the groups of Betz and Augustine now have found evidence that the speed of transmitter release itself may be controlled, somewhat ironically, by the evolutionarily highly conserved general fusion protein N...Biologists Map First Gene For Age-Related Hearing Loss In Mice
...ed name is the B6 mouse. Larry Erway, professor of biological sciences at theUniversity of Cincinnati, said the mapping work involvedtraditional and time-consuming genetic crosses as well as thenewer DNA microsatellite techniques. "We started the genetic cross in 1991," said Erway. The micewere produced at the ...PEBBLEs Help U-M Scientists Open A Window On Cell Chemistry
...lopment of antidotes or countermeasures for lethal biological warfare agents." Kopelman added that the ability to "watch what's happening inside a cell" has a wide variety of potential applications in other fields---including cancer therapy, glucose monitoring, drug or chemical toxicity testing, and all ar...Insights Into The Proteasome - A Fascinating Macromolecular Machine For Protein Degradation
..., it has important regulatory roles in numerous biological processes such as cell cycle, apoptosis or the ... the proteasome and modulates its activity; the biological function of PA28 is presumed to be related to the proteasomes role in antigen processing. Rece...Food Bacteria-Spice Survey Shows Why Some Cultures Like It Hot
... seethe interaction between cultural evolution and biological function. "I believethat recipes are a record of the history of the coevolutionary race between usand our parasites. The microbes are competing with us for the same food,"Sherman says. "Everything we do with food -- drying, cooking, smoking, salting...Virginia Tech Researchers Assess Watershed Management For EPA, NSF
... from CE,agriculture and applied economics (AAEc), biological systems engineering (BSE),biology, fisheries and wildlife sciences, and the Virginia Water ResourcesResearch Center (VWRRC), was one of four selected out of about 130 nationwidethat submitted proposals. The Upper Roanoke River Watershed has ......d policy changes, and changes (often reduction) in biological diversity. Here are some of the key questions that the scientific community willre-examine: What will be the consequences of climate and atmospheric composition changeson the functioning of natural ecosystems and on the planet as a whole? Can th...... are indispensable tools for the understanding of biological phenomena at the molecular level, and for the d...; moreover, the method is fully compatible with biological environments. Two important applications were addressed by the authors: Real-time measurements...