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Tag: "clusters" at biology news

Infections could contribute to adult brain tumours

... the Netherlands between 1983 and 2001. They found clusters of cases of glioma tumours, which make up about ha... environmental factors, such as pollution, produce clusters of cases in one place over a much longer time period. However, the research team stresses it is too...

Mining for gems in the fungal genome

...entific analyses, making secondary metabolite gene clusters easy to spot. Keller capitalized on these facts t...tant. They knew these were very likely to be gene clusters involved in the production of secondary metabolites. In a parallel experiment, Bok designed a fun...

Brainstem blocks pain to protect key behaviors

...urvival that the brains of all vertebrates contain clusters of nerve cells that can suppress pain long enough to allow the animal to eat, drink -- or pee -- in peace. A report from researchers at the University of Chicago, published early online in the Proceedings of the National Academy of Sciences, shows...

Team led by Carnegie Mellon University scientist finds first evidence of a living memory trace

... In the current research, the scientists studied clusters of neurons called glomeruli within the honeybee's antennal lobe (AL), considered the invertebrate equivalent of the brain's olfactory bulb. Team member Marcel Weidert placed fluorescent probes within different glomeruli, and imaged their activity usi...

Scientists observe how a close bond activates the immune system

...m to modify the pattern of T-cell antigen receptor clusters in the immunological synapse. Previous research has shown that T cell receptors cluster in a bull's eye-pattern at the interface between the T cell and the synthetic dendritic cell but the significance of this arrangement has been unknown. Thanks to...

U. of Colorado researcher identifies tracks of swimming dinosaur in Wyoming

...just anywhere, but at particular nodes, just below clusters of flexible, finger-like appendages. Baumiller and Messing speculated that the sea lilies might be shedding the ends of their stalks to release themselves from the places where they were anchored, then somehow moving to another location and using the...

Creeping crinoids! Sea lilies crawl to escape predators, new video shows

...just anywhere, but at particular nodes, just below clusters of flexible, finger-like appendages. Baumiller and Messing speculated that the sea lilies might be shedding the ends of their stalks to release themselves from the places where they were anchored, then somehow moving to another location and using the...

New classification of eukaryotes has implications for AIDS treatment, agriculture and beyond

...ganisms. The new classification recognizes 6 major clusters of organisms, rather than the 4 traditional Kingdo...iting possibilities for novel drug therapies. The clusters are 1) the Opisthokonta, grouping the animals, fungi, choanoflagellates, and Mesomycetozoa; 2) the ...

Software 'agents' could help unmask reality of disease clusters

...atients could be hampering efforts to spot disease clusters and monitor the health effects of environmental po...search groups investigating everything from cancer clusters to the risk of living near to hazardous waste sites is often restricted, altered or aggregated in or...

Experimental shingles vaccine proves effective in nationwide study

...he virus is not eliminated; rather, it retreats to clusters of sensory nerve cells usually located near the spinal cord, where the virus persists in a dormant state. As immunity weakens with advancing age, the virus can reactivate, multiply in and damage sensory nerve cells to cause pain. It then migrates to ...

'Gadonanotubes' greatly outperform existing MRI contrast agents

...the gadolinium atoms naturally aggregate into tiny clusters of about 10 atoms each. Wilson and colleagues suspect the clustering is causing the unexplained increases in magnetic and MRI effects that they observed in tests at Rice, at the University of Houston's Texas Center for Superconductivity, and in the S...

Virtual animal shelters ?How the Internet is transforming the experience of pet adoptions

...the majority of these organizations operate out of clusters of private foster homes, they're successfully winning high visibility for placing their pooches. In a presentation at the 100th annual meeting of the American Sociological Association (ASA) in Philadelphia, University of Cincinnati sociologist Angel...

UF researchers kill resistant bugs one bandage at a time

... said. The coating comprises thousands of nitrogen clusters that permanently bond to substances such as gauze and fabric. Other dressings use a process that allows molecules to diffuse into the air and into the wound, which can slow healing and increases the chance germs will develop resistance. "These techn...

Bitter or sweet? The same taste bud can tell the difference

...of taste is on the tongue." Taste buds are really clusters of 50 to 100 cells. Nerve fibers connect each bud to the brain, but only a few of the cells in each taste bud touch these fibers. The prevailing thought was that cells that don't have a connection to a nerve fiber must have some way of sending a sign...

Pinpointing a culprit molecule in Alzheimer's disease

...zymes, produces the amyloid beta (Ab) peptide that clusters into the amyloid plaque that clogs the brain and kills brain cells. The clipping of APP produces two types of amyloid beta peptide--one 40 amino acid units long (Ab40) and one 42 units long (Ab42). Circumstantial evidence has suggested that Ab42 is ...

Bumblebees copy one another when contending with unfamiliar flowers

...ebees the choice between several artificial-flower clusters in a laboratory setting. The bees preferred to feed from clusters where another bee was already collecting nectar, rather than making their own independent choices. M...

Researchers use 3-D imaging system to unveil swimming behavior of microscopic plankton

...ce, tiny animals called zooplankton are swept into clusters and patches by ocean currents. The very survival of many zooplankton predators--from invertebrates to whales--and the success of fishermen catches can depend on their success at finding those patches. For almost a century ocean scientists have suspe...

Mosaic mouse technique offers a powerful new tool to study diseases and genetics

...se body is genetically engineered to produce small clusters of cells with mutated genes. The new technique, called Mosaic Analysis with Double Markers (MADM), was developed in the laboratory of Liqun Luo, professor of biological sciences at Stanford who was recently named an investigator with the Howard Hugh...

Genome study of beneficial microbe may help boost plant health

...evidence that P. fluorescens may have acquired new clusters of genes, called genomic islands, by means of lateral transfer from phages or other microbes." ...

Chemical Engineer Kao Explores Antibiotic Synthesis With DNA Chips

...or changes in either expression of antibiotic gene clusters or final antibiotic yields. DNA shuffling Studying mutant strains that already exist only represents half of Kao's work; she also creates her own mutants. Creating the mutants on her own offers two advantages. First, instead of making mutants with ...

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