Tag: "individual" at biology news
Dangerous Chemical Combination Presents Possible Scenario For Gulf War Illnesses
...chemicals can cause symptomsthat are not caused by individual
chemicals alone." In the Duke study, researchers ...lwhen used individually." The chickens exposed to individual
chemicals showed no outward signs ofillness or debilitation, the researchers said. But chickens expo...
Race Plus Roaches: A Breathtaking Link
...cted using a handheld vacuum cleaner equipped with individual
collection bags. Detectable levels of cockroach allergen were found in 26 percent of urban and suburban bedrooms, where children spend the most number of consecutive hours. Over 80 percent of the children with cockroach residue in their bedrooms were...
Salvage Gene Is At The Root Of Many Mutations
...most common form of DNA damage is sporadic loss of individual
molecules of adenine and guanine -- two of thefour...change the genetic code and cause amutation. While individual
mutations are seldom serious, "if you get that rare mutation that causes cancer, you're introuble," ...
New Ultrasensitive Technique For Accurately Characterizing Biomolecules Is Developed By Cornell Chemists
...error. "With this, you can also measure masses of individual
pieces of a molecule for further characterization." The researchers -- McLafferty; Gary A. Valaskovic, a postdoctoral associate in McLafferty's lab; and Neil L. Kelleher, a doctoral student -- reported their studies in the journal Science (Aug. 29, 1...
Duke Ecologist Says Logging Is Creating 'Mahogany Deserts'
...s that look like parasols. As treetop winds blow, individual
wing-shaped seeds can then detach andflutter to the ground "like little helicopters," Snook said. Sheestimated that airborne dispersal can sow mahogany seeds at least 180 feetaway from the parent tree. Early in her research, Snook realized that almo...
How Birds Sing
..." --are composed by the higher structures, but the individual
notes get filled in by the lower brain regions. Th...ox. They recorded electrical activity just outside individual
brain cells of interest, and compared the signal with sounds the birds made. The impulses in the RA ...
Cholesterol Anchor Helps Signaling Proteins Direct Development
...hedgehog signals can turn on and off genes in many individual
cells, coding for special traits needed to help create limbs, eyes, spinal column, or other structures. In recent years, Hopkins scientists have discovered that hedgehog proteins split in two to activate. During the split, the activated form of the ...
Behemoth Animals May Follow Same Extinction Patterns
...ecline curves on the same graph show that in their individual
5 millionyear periods, these giant beasts shared a very similar pattern of decline. "No one has ever put both graphs on the same chart before," saysCuffey. "Because the patterns appear to be similar, perhaps we canlearn something about the decline o...
Scientists Identify Retrovirus-Like Components In Corn Genome
... could wind up with more than 30,000 mutations per individual
plant, and a dead host." Instead, the retrotransposons insert themselves in positions where they tend to be inactive, allowing them to sit quietly and not drain energy from the host, he says. The result is that the mobile DNAs "hide" within the genom...
Medicinal Leech May Offer Clues To Neural Regeneration
...eurons, making it impossible to identify what each individual
cell does, she says. By contrast, the medicinal le... rather than thousands, we can track the NOS to an individual
cell and monitor its function, both within the cell and within the system," she says. The 21 ganglia...
Two Long-sought Diabetes Gene Found
...is on treating diabetes in families rather than in individual
patients," added Bell. "We need to screen the brothers and sisters and other relatives of those with diabetes and test methods to prevent the disease in those with a genetic propensity to it." The two genes each cause a form of non-insulin dependent ...
Optical Microscopy Shines Light On Biology
LAWRENCE, Kans. -- A chance to study individual
biological molecules in a liquid environment has b...icroscopy, a technique that can be used to look at individual
molecules. In instruments that use this process, the object to be viewed is placed close to a speci...
Environmental Impact Statements Need To Be Made Easier To Decipher
...e inclusion of "before and after"visuals increased individual
understanding dramatically in a subsequentstudy. "When citizens can't understand the material presented in an EIS [environmentalimpact statement], they can't participate in the process," said WilliamSullivan, a professor of natural resources and env...
Bigger Biology Tackled Through Keyboards
...ays can involve trying tofigure out huge arrays of individual
activities on vastly different scalesand timelines, from the rapid genetic mutations of certain viruses to thelong-term impact of species extinctions on global ecological processes. Fortunately, a relatively new field of science known as computation...
Laser Microscope At Cornell Images Serotonin In Live Cells
...ntration and the total neurotransmitter content of individual
granules in intact cells. Here is how it works: A...ase attributable to serotonin. But now we can see individual
granules and we have a way to measure the serotonin in active cells." Maiti, a postdoctoral associat...
Researchers Corral Millions Of Microscopic Membranes
...e the next best thing to packaging living cells in individual
boxes for study.Borrowing microfabrication techniques from electrical engineering, the researchers have created a specially prepared surface that holds millions of cell-sized squares composed of an artificial membrane that closely mimics the surface ...
Penn State Wetlands Project Seeks Scientific Evaluation Criteria
...mainstem floodplains, and slope wetlands. At each individual
site, characteristics such as plant life, animal life, soil composition, sedimentation and basin shape also were analyzed and categorized. "The project also extensively researched bird, amphibian and plant species that inhabit only certain wetl...
Birds Deal With "Cocktail Party Effect"
... talent to communicatewith each other, recognizing individual
birds by the pitch ofsome parts or all of their song. Research into absolute pitch in birds led to his currentwork on the cocktail party effect, designed to learn whetherbirds havethe ability to pay selective attention to one sound that occurssi...
Fund Aims To Repay Developing Nations For Valuable Genes
..., scientists alsohave become interested in cloning individual
genes that produce beneficialtraits such as disease- or pest-resistance when inserted into another plant. As new laws evolved to allow protection of biotechnology inventions,research institutions were able to patent not only new plant varieties,but ...
President's Budget Proposal Cuts R&D By 14 Percent By 2002
...st federation of scientists with more than 144,000 individual
members and nearly 300 scientific and engineering societies. It conducts a variety of programs in science policy, science education and career development, and international scientific cooperation. The Association publishes the weekly peer-reviewed...
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