Brain Protein "Rescues" Neurons From Atrophy
...d the first steps in deciphering the intercellular chemical "language" that neurotrophins use in fostering bra...nse to different neurotrophins. Understanding this chemical language is a first step in learning to manipulate the growth of brain cells, the scientists said. P...Dangerous Chemical Combination Presents Possible Scenario For Gulf War Illnesses
...ientists have developeda theory to explain why the chemical mix is dangerous. They said their resultsindicate ...ly and then in variouscombinations. Doses of each chemical were selected prior to the study by determining themaximum amount a chicken could withstand without ...New Cancer Switch Discovered By Duke Medical Center Pharmacologists
... molecules represent a major undiscovered way that chemical signals are transmitted from tyrosine kinases into the cell's nucleus," said Pendergast. The Abi proteins may be a previously unknown mechanism for producing cancer, said Pendergast, not by direct damage to a cancer gene, but by damage to a "safety k...New 'Twist' In Proteins Offers Possible Route To Improved Antibiotics
...ign and construct proteins for use as medicinesand chemical probes. The researchers' next step will be to pinpoint the LpxA enzyme's "activesite," which is the part of the protein that actually catalyzes thechemical reaction. Any successful antibiotic must plug into the active site,blocking its action...Duke Geologists Explore Alternative Way To Measure Ice Age Sea Bottom Temperatures
...nterview. A Duke Ph.D. candidate who performed the chemical analyses for the study, Dwyer said that more oxygen 16 is indeed present in warmer seawater, whereas oxygen 18 is more abundant in colder seawater. That's because the lighter oxygen 16 tends to get preferentially stored in glaciers when seawater evap...Rosemary May Have Anti-Cancer Properties
...ry stores. They then treated the rats with DMBA, a chemical knownto cause cancer. (DMBA has a structure similar to benzopyrenes, a classof carcinogens found in auto emissions and cigarette smoke.) The rosemary diet reduced by 76 percent the number of instances of DMBAbinding to the mammary cells, compared t...Transgenic Rice Plants Resist Insects, Drought And Salt Damage
...nhibitor, as they eventually do to many toxins and chemical pesticides, because the protein has a different type of action on their systems, he said. And genes for the insect-, salt- and drought-resistant rice should stay where the genetic engineers put them and not escape to produce a super weed, Wu said, b......e male entices the female by presenting her with a chemical offering, secreted from a gland in his head. Next...the male's copulatory advances. Much more of the chemical is transferred to the female beetle in the mating male's sperm package. And she, in turn, bestows t......e distinct. The different caves have verydifferent chemical signatures," said Kinkle. Sarbu first began exploring the Movile Cave in 1986 followingits discovery by Romanian geologist Cristian Lascu. Theexplorations halted after Sarbu fled the oppression of theCeausescu regime, resuming in 1990. The current r...Researchers Use Hydrated Lime To Reduce Toxic Selenium Emissions
...ue gas, saidLiang-Shih Fan, professor and chair of chemical engineering atOhio State. Fan and Suhas Mahuli, a post-doctoral researcher in chemical engineering,have studied ways to capture selenium from flue gas before itescapes into the atmosphere...Photosystem I -- An Intermediate Step -- May Not Be Necessary For Plants
...n green plants convert the energy of sunlight into chemical energy and use carbon dioxide to produce sugars -- needs two intermediate light-dependent reactions for successful energy conversion: Photosystem II and Photosystem I. But according to a new study reported today (July 19), that dogma may have gone f...Bee Sting Treatment Should Emphasize Speed, Not Method Of Removal
...nest, Visscher said. Once a bee stings, it emits a chemical alarm pheromonethat signals other bees, making them more likely to sting. "Getting to safety is more important than removing stings immediately,but stings should be removed as soon as possible once a person is away fromthe colony." A person who is ...Nitric Oxide May Hold Key To First Treatment For Deadly Form Of Malaria, Duke Scientists Report
... University Medical Centerreports finding that the chemical nitric oxide is a universal signalingmolecule that can control basic life processes down to the level of thegene, the master plan of a cell. The study findings, published in the Sept. 6 issue of the journal Cell,describes an entirely new cel...Cooking And Salad Oils Could Lubricate Cars, Boats, Machines
..., and Joseph Perez, adjunct professor of chemical engineering, reported that, when blended with a pr... U.S. Department of Agriculture (USDA) oil chemical research laboratory in Peoria, Ill. Perez, who retired from the U.S. Department of Energy a......ospray. Valaskovic used laser heated fabrication, chemical etching and vaporized gold plating to produce capillary tips with a diameter of only one ten-thousandth of an inch (2.5 micrometers). The capillary flow rate is about 1,000 times slower than is typical for electrospray, lowering sample requirements. ...Nitric Oxide Found To Control Cells By Turning On Genes; Suggests New Role In Health And Disease
... University Medical Centerreports finding that the chemical nitric oxide is a universal signalingmolecule that can control basic life processes down to the level of thegene, the master plan of a cell. The study findings, published in the Sept. 6 issue of the journal Cell,describes an entirely new cel...Harvard, Duke Researchers Discover 'Off-switch' Inside Human Cells
... prevalentbiochemical mechanisms for responding to chemical stimuli such as hormones. The scientists believe ...ls and brain cells. These proteinswitches transmit chemical signals from the cell surface into the cell'sinterior, triggering a vast array of cellular processes...Major Plant Genome Research Project Underway
... of biomass products such as alternative fuels and chemical feedstocks (which can conserve petroleum resources) and using plants to clean up contaminated soil (phytoremediation) at DOE's former nuclear weapons production sites. Catherine Woteki, USDA acting undersecretary of agriculture for research, ...NCAR Scientists Trek To Africa For Biosphere-Atmosphere Chemistry Study
...ar Bangui, the CAR capital. EXPRESSO is collecting chemical data at these sites--along with meteorological dat...," according to Klinger. Isoprene, a fast-reacting chemical emitted by trees, plays an important role in the atmosphere's overall chemical balance. "Measuring i...Scientists Trek to Africa for Biosphere-Atmosphere Chemistry Study
... African Republic capital. EXPRESSO is collecting chemical data at these sites along with meteorological data throughout the study area to explore how the vegetation and fires interact with the atmosphere. To sample the African atmosphere, EXPRESSO is using: enclosures that measure atmospheric exch...