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Tag: "site" at biology news

Researchers give name to ancient mystery creature

... 10 years ago, more teeth were discovered at a dig site near Drayton Valley and on the banks of the Blindman. But the creature mystified the researchers, who could not positively identify it, and exactly where it fits into the evolutionary ladder is still unknown. Horolodectes remains an enigma to this da...

How ants find their way

...rategy works. On a wood ant's first trip to a food site it follows a chemical trail left by earlier ants. ...oute as they travel and on later trips to the food site will navigate using a combination of landmarks and memories of the whole landscape. The scientists f...

Too mellow for our predatory world

...nt of Ecuador has opened the UNESCO world heritage site of the Galápagos Islands to the cruise ship market. With growing mass tourism, the situation is getting more difficult. The National Park Management is considering raising the entry fee from the currently charged $100 to $500 in order to reduce the ...

A wolf in sheep's clothing: Plague bacteria reveal one of their virulence tricks

...Yersinia's harmful effects. "Altering this binding site not only impairs the bacteria's ability to disrupt the host cytoskeleton," Stebbins says, "but it decreases its virulence significantly." "It's rare to find something that has such a strong effect that you can hit one protein so specifically, knock ...

Malaria vaccine prompts victims' immune system to eliminate parasite from mosquitoes

...icle describing this work was published on the Web site of Proceedings of the National Academy of Sciences. The vaccine was developed with conjugate technology, which joins or "conjugates" molecules the immune system has great difficulty recognizing to molecules the immune system can recognize easily. P...

UNC scientists solve mystery of how largest cellular motor protein powers movement

...f the unknowns about dynein was that the molecular site where chemical energy is initially released from ATP is very far away from where the mechanical force occurs. The mechanical force must be transmitted over a large distance.? The study was published online Nov. 22 in the Proceedings of the National ...

Plutonium or greenhouse gases? Weighing the energy options

...n," Ewing said, referring to the proposed disposal site in Nevada that has been under study for more than two decades. Ewing recently co-edited a book, "Uncertainty Underground," that reviews uncertainties in the analysis of the long-term performance of the Yucca Mountain repository. Plutonium created a...

New evidence of early horse domestication

Soil from a Copper Age site in northern Kazakhstan has yielded new evidence fo...rth once enriched by horse manure. The Krasnyi Yar site was inhabited by people of the Botai culture of the Eurasian Steppe, who relied heavily on horses fo...

'Fruit fly dating game' provides clues to our reproductive prowess

...rom the Chicxulub crater itself, as well as from a site in Texas along the Brazos River, and from outcrops in northeastern Mexico reveal that Chicxulub hit Earth 300,000 years before the mass extinction. Small marine animal microfossils were left virtually unscathed, says Keller. "In all these localiti...

Far more than a meteor killed dinos

...rom the Chicxulub crater itself, as well as from a site in Texas along the Brazos River, and from outcrops in northeastern Mexico reveal that Chicxulub hit Earth 300,000 years before the mass extinction. Small marine animal microfossils were left virtually unscathed, says Keller. "In all these localiti...

Molecular 'on/off switch' controls immune defenses against viruses

...each contain a repressor domain, a sort of docking site that controls the actions of each protein. The domain is the key site that regulates the ability of RIG-I to bind to its signaling partners, including LGP2, acting as a s...

Gene therapy study takes aim at prostate cancer

...uce the risk that cancer will recur at or near the site of the tumor as well as in distant points in the body. "We hope that by generating a systemic immune response, we are enabling the body to destroy prostate cancer cells that have moved elsewhere," he said. Kadmon and his colleagues plan to test si...

Electronic chip, interacting with the brain, modifies pathways for controlling movement

...s. Namely, the movements evoked from the recording site changed to resemble those evoked from the stimulation site. The researchers said that a likely explanation for these changes is the strengthening of pathways within the cortex from the recording to the stimulation site. This strengthening may have ...

P(acman) takes a bite out of deciphering Drosophila DNA

... inserted into the genome of the fly at a specific site using phiC31-mediated transgenesis. It is a new technique with far-reaching promise, said Bellen. P(acman) overcomes certain obstacles that have hampered research. It allows the cloning of large pieces of DNA to be used to transform the genome,...

Jumping gene could provide non-viral alternative for gene therapy

...e FASEB Journal, hypothesized that the integration site for transposons can be selected. "Typically, viruses and transposons will integrate anywhere along the genome," he says. "If they integrate anywhere, it can obviously cause harm. If we can target the integration, be able to insert the gene at a safe ...

Solved: The mystery of flesh-eating bacteria's relentless attack

...o observed many white blood cells at the infection site in mice receiving the peptide. Next, the team turned its attention to an important human immune system signaling molecule, interleukin-8. In healthy people, an infection triggers the production of interleukin-8, which acts as a distress call. "Whe...

Rhesus monkeys in Nepal may provide new alternative for HIV/AIDS research

... from 21 Nepali rhesus macaques living at a temple site in Kathmandu were obtained as part of a comprehensive health screening conducted at the temple. These samples were compared with existing samples collected from more than 300 Indian- and Chinese-origin rhesus macaques. The researchers did sequence a...

Tests for 'face-blindness' reveal disorder may not be so rare

...hey've already used the new test and a related web site ( www.faceblind.org ) to identify hundreds of "face-blind" individuals, far more than scientists had identified previously. The researchers, led by Ken Nakayama and Richard Russell at Harvard and Bradley Duchaine at University College London, have ...

Tamed 11,400 years ago, figs were likely first domesticated crop

...tion. Similar fig drupelets were found at a second site located some 1.5 kilometers west of Gilgal. The scientists compared the ancient figs to modern wild and domesticated variants and determined that they were a mutant selectively propagated by humans. In this variety of fig, known as parthenocarpic, t...

Researchers report technique for freezing and preserving genetically enhanced pig embryos

... In a paper posted today (May 3, 2006) on the Web site of Biology of Reproduction--Papers in Press, a team headed by Dr. Randall Prather, co-director of the National Swine Resource and Research Center, note that their technique could prove valuable in allowing genetically enhanced swine to be transported...

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