Imaging study provides new information on how the brain processes sounds of different tones
... increasing rate while response waveshape remained unchanged and sustained. In the medial geniculate body, increasing rate produced an increase in amplitude and a moderate change in waveshape at higher rates (from sustained to one showing a moderate peak just after train onset). In auditory cortex, ampli...UF study: Calorie restriction reduces age-related brain cell death
...ge in the normally fed animals but were relatively unchanged in those that had been restricted, the researchers found. In the future, Leeuwenburgh will explore other pathways that may play roles in neuron death. "It's a big puzzle, and we're slowing putting the pieces of the puzzle together, so to speak," ...For spinal cord injury patients, new insights for rehabilitation therapy
...howed a 30 percent increase in leg blood flow with unchanged blood pressure levels, indicating a marked reduction in vascular resistance. Conclusions The researchers conclude that leg vascular resistance is dramatically enhanced in SCI individuals. This may be caused by structural as well as by functional c...Genebanks: Preserving genetic diversity for Earths future
...obiology, it is possible to keep tissues alive and unchanged for hundreds of thousands of years. Using cryopreservation technologies, the Zoological Society of San Diego has created a "Frozen Zoo," which stores viable cell lines from more than 3,200 individual mammals, birds, and reptiles, representing 355 sp......urs walked the planet and have survived relatively unchanged for about 250 million years," said CI President Russell Mittermeier. "But mankind's actions have brought them to the brink of extinction. It's our responsibility to bring them back." CI believes that effective protection of these 11 hotspots will go ...Prematurity, infections most likely causes of brain damage among infants
... of cerebral palsy and other problems has remained unchanged over the past 40 years." Researchers followed all babies born at Johns Hopkins between April 1999 and December 2001 weighing less than 3 pounds, 5 ounces and who were admitted to the hospital's neonatal intensive care unit. To compare those bo...QuikClot (TM) will be made available to public
...nits because they hemorrhage to death (a statistic unchanged since the Civil War). He also knows that 50,000 Americans die each year at the site of auto accidents because of uncontrollable bleeding. As head of ONR's Casualty Care and Management program, Given is providing funding for research on a remarkable...Study links amyloid plaques in Alzheimer's brains to genes vital to normal memory
... the hippocampus and cerebral cortex, but remained unchanged in amyloid-free regions of the brain. The researchers then compared their findings in the mouse model with an analysis of human Alzheimer's disease tissue from the Brain Donation Program at Sun Health Research Institute in Sun City, AZ. The same six ...Fruits offer powerful protection from skin cancer
...ing exposure. The Wnt responsive gene, c-myc, was unchanged with UVB, while UVB and PEOH suppressed expression as much as seven fold at two hours. The Wnt signaling pathway helps regulate cell structure, movement and growth. Activation of the pathway requires the ligand to bind to a frizzled receptor (the ...Discoveries reveal that gene regulation is bipolar
...r genes and associated control regions have remain unchanged over time. Using a powerful statistical approach,...the sequence of the TATA box since it had remained unchanged at many genes. Other sequences that also were rich in As and Ts changed from one species to another...Antibiotics in the environment
...0% of antibiotics fed to food animals are excreted unchanged in animal feces and urine. Researcher Kudlip Kumar explains that these animal wastes when applied to fields present a potential for the spread of antibiotics in the environment via non-point source pollution. According to Kumar, there is not muc...Hopkins scientists overcome main obstacle to making tons of short, drug-like proteins
...nt methyl group. (One amino acid, proline, remains unchanged -- once its nitrogen is protected, there's no room for the methyl group.) "It's pretty simple chemistry, and it's kind of amazing it hadn't already been applied to this problem," says Merryman. "The process gave us efficient and essentially complete ...Analysis uncovers critical stretches of human genome
...lihood that a sequence of this length would appear unchanged among all three genomes by chance was infinitesimally small. The results, said Haussler, were startling. The comparison of the three genomes revealed 481 such elements that they called "ultra-conserved." "What really surprised us was that the region...Surprising 'ultra-conserved' regions discovered in human genome
...icken. The fact that these sequences have remained unchanged over long periods of evolutionary history indicate...regions that were completely unchanged. All of the unchanged regions, referred to as "ultra-conserved elements," were also found in the dog and chicken genomes, ...Mutant biological machine makes proteins but can't let go
...ibosome actually has another set of evolutionarily unchanged nucleotides, slightly farther from its "business e...rts of the tRNA are "held" by other evolutionarily unchanged nucleotides in the ribosome as the amino acid is added onto the protein. Green points out that these...Gestational diabetes not found to alter the metabolic processes in obese pregnant women
... glucose production, but serum concentrations were unchanged over the same time period. In obese subjects there was no change in either basal carbohydrate oxidation or non-oxidative carbohydrate metabolism over time. However, there was a significant 50-80 percent increase in basal fat oxidation. The increa...Origin of West Indian insect eater much older than previously thought
...hey have remained biologically and structurally so unchanged over millions of years, and how they managed to survive the cataclysmic asteroid strike thought to have killed off the dinosaurs about 65 million years ago.As the theory goes, an asteroid, about 10 kilometers in diameter, struck somewhere in what is ...FSU scientists develop new tests to detect nut allergens in processed food
...igenicity of the tree nut proteins remained mostly unchanged throughout the irradiation and thermal processing, dashing hopes that the treatments would render the healthy snacks safer for wider consumption and more profitable for growers and industry. However, the bad news in turn generated some very good news...Long-term heart damage may result from constant confrontation and defeat
...completely, although the stressor is substantially unchanged over time. There is a general tendency to consider the acute effects observed during and shortly after either a single or a repeated stressor as persistent changes when the stressor is applied chronically. To mimic the effects of challenges f......one copy of the gene, while the other copy remains unchanged and preserves the gene's original function. Over time, the individual gene function slowly diverges. "In any species, some of the duplicate genes could be incomplete or nonfunctional," says Kawasaki. "Others may be become specialized genes coding ...