Tag: "signatures" at biology news

Exotic Newcastle disease

... 13, and within days had generated possible target signatures for development of a rapid assay. LLNL biomedical scientist Evan Skowronski worked with CAHFS staff at UC Davis over the next two months to optimize performance of the assays and pioneer ways to rapidly process hundreds of samples per day. Skowronsk...

Forensics bringing bacteria into the courtroom

... looking for molecular microbial signatures. These signatures are detected by measuring the polymorphisms, or variations, between microbial strains and are used to infer the origin, relationship, or transmission route of a particular isolate. Recently, microbial forensics has been used in cases such as the alle...

Scientists crack the black box of coastal ecosystems

...aster growth rates. They can show distinct genetic signatures that set them apart from neighboring areas. Especi...toliths of many marine fish show distinct chemical signatures reflecting their movements through the water. Acting like mini-flight recorders, the bones offer the...

Finding life away from Earth will be tough task, says noted paleontologist

..., it is important for scientists to understand how signatures for biological life can be altered or erased from rocks, primarily by heat and pressure. To sort out the terrestrial evidence and to apply it to the search for simple extraterrestrial life will involve many, if not most, of the existing scientific di...

Scientists discover gene 'signature' for tumor's tendency to spread

...as the scientists try to validate the power of the signatures a necessary step toward a clinical test. Such a test could make a critical difference in treatment of some tumors. For example, up to 30 percent of women with small primary breast cancers have undetectable "micrometastases" that gives them a poorer ...

Using the ocean's living light shows to fight terrorism or track the planet's most massive migration

...der and her team have developed a library of light signatures for various ocean creatures based on telltale characteristics of each such as the shape and duration of the glow. A computer essentially stacks each frame of video footage to create a three-dimensional image of the bioluminescence captured by the ca...

NSF awards $9 million for study of proteins

...es, they have been able to detect protein fragment signatures from pathogens. The computational biolinguistics grant is one of more than 300 announced by the National Science Foundation as part of its Information Technology Research (ITR) program. This year, NSF awarded a total of $144 million in new grants und...

Interpreting a climate record from 10,000-year-old migrating waters

... water chemistry, abundance of water, and isotopic signatures to reconstruct past climate conditions on a regional scale on most continents. This is one of the things needed to test and verify global climate change models," said Glassley. To interpret such a climate record, however requires conducting highly d...

Gene profiles predict survival

...idual genes within these patterns formed molecular signatures that had an even stronger correlation with surviva...hemotherapy. The predictive power of the molecular signatures was independent of the international prognostic index. From 12,000 to 17 genes DNA microarrays r...

Lawrence Livermore research team finds unique DNA signatures to improve anthrax detection

... transferable between microorganisms. The new DNA signatures represent an increased repertoire of chromosomal m...of the B. anthracis bacterium. A robust set of DNA signatures should produce no false negatives for all strains of B. anthracis, and no false positives for closel...

Advances developed to detect bioterrorist agents could find use in protecting food supplies

...nvention Center. "The tools we use to develop DNA signatures for the detection of bioterrorist agents could als...rch out food-borne pathogens," McCready said. (DNA signatures are areas or regions of DNA unique to specific organisms). "We believe people are going to look at ...

Research highights from Pacific Northwest National Laboratory

...d man-made events. Sometimes hard-to-read seismic signatures offer only slight variations. The very complex methods developed by PNNL statisticians are helping seismologists around the world determine if they are detecting a shift in the earths crust or the results of a nuclear test detonation....

New process by Temple grad student can place loose fossils back into the strata or determine fakes

...e, Patrick would be able to compare the rare earth signatures of the bones or pieces to see if they matched. If theyre not all from the same strata, they will not have the same signature. Patrick, who taught chemistry, math, and physics for 15 years, became interested in geology when she accompanied her oldes...

Scientist probes fossil oddity: Giant redwoods near North Pole

...el Heilberg would have oxygen and hydrogen isotope signatures that matched those found in the fossils. While it might seem mind-boggling to have the equator watering the north pole, Jahren notes that other major climatological differences at the time included the lack of a north polar ice cap. Its very hard t...

Humans emerged 'out of Africa' again and again

... replacement event), the three significant genetic signatures of the older expansion event and the six significant genetic signatures of older recurrent gene flow would have been wiped away," Templeton writes. It is likely that the...

Researchers link migratory birds' winter, summer ranges

...reeding season contain carbon and hydrogen isotope signatures that reflect a bird's diet and that of the local (breeding) environment. Because the isotopes vary naturally among geographic areas in North America and because the birds only molt once a year (in the breeding areas), analyses of isotopes in feathers...

UMass researchers find environment on Earth that mimics Mars geochemically and supports ancient life form

...underground areas we considered promising, the DNA signatures of the bacteria present indicated they were living on organic matter carried in the groundwater or that had been deposited along with the subsurface of rocks. Those environments are not likely to represent conditions on Mars because, on Mars, such or...

New computer program detects overlooked gene segments: Previous estimates of human gene number too low

...biological basis of some of these telltale genetic signatures is unknown, says Zhang. "But they are real, and perhaps someday biology will explain why they are there." One such signature is the frequency with which two building blocks of DNA, C and G, occur next to each other. Despite the fact that they do not ...

Gene chips bring new order to lung cancer types, could yield sharper diagnoses, better drugs

..., the scientists could capture distinctive genetic signatures of each cancer type. One such signature identified...ferent signature. Scientists also used the genetic signatures to distinguish between tumors originating in the lung and those that had spread from elsewhere in th...

Study: King Midas' feast offered golden opportunity for fungi

...nt wood, Filley says. "The structural and chemical signatures of the decay, which is heaviest where the body was laid and on the tabletops surrounding the coffin, indicates that the fungus was fueled by nitrogen from the king's body and food sources left in the tomb," Filley says. "Our results account for the t...

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