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Tag: "not" at biology news

Ancient DNA traces the woolly mammoth's disappearance

...other species, a picture is emerging of extinction not as a sudden event at the end of the last ice age, ... they found, however, was an “interesting pattern, not like those of the other species.” Their genetic data indicate that Siberian mammoths expanded fro...

Brightening prospects of using fluorescent nanotubes in medical applications

...eriments that have been done indicate that they do not damage living cells. By comparison, quantum dots, ...contain cadmium, which is highly toxic, and so may not be appropriate for “in vivo” applications. Nanotube fluorescence is extremely stable and can las...

Research shows cord blood comparable to matched bone marrow

... “What this study suggests is that cord blood need not be considered a second line therapy any longer. The fact that cord blood is banked and readily available with little notice is a great advantage. Today, leukemia patients can wait months for an appropriately matched bone marrow donor, during which t...

Dual-imaging technique useful before -- and during -- brain surgery

..., explains Leach, patients with limited vision may not demonstrate as much activity in the brain in areas...nction there—it may just be that functional MRI is not sensitive enough to detect it,” says Leach....

Breakthrough developments in rheumatoid arthritis reported

...nd make it available to scientists. The data will not include personal identifiers but scientists will have information on age and ethnicity to best match their groups to study. ...

'Lucky 13' as new gene discovery offers further hope for childhood blindness

...ll virtually zero as long as the other parent does not carry it," says Professor Inglehearn. "The odds of two parents both carrying the same or different mutations in the LCA5 gene is very low, but this increases where the parents are related." Professor Inglehearn hopes that the findings will be use...

Researchers shed light on shrinking of chromosomes

...e condensation. What happens when chromosomes are not correctly separated and distributed during cell division we know very well; two daughter cells with either broken chromosomes or different numbers of chromosomes result and severe diseases including cancer can arise. But so far we know only little ab...

U-M researchers discover gene switched off in cancer can be turned on

...that a gene called Brahma, or BRM, is silent – but not missing – in some cancer cells. By exposing the BR... The researchers sought to understand why BRM is not expressed in certain cancer cell lines. They found no mutations to the gene but rather that it was j...

Researchers examine carbon capture and storage to combat global warming

...But nonetheless, our dependence on fossil fuels is not going to last forever.''...

Undergraduate research shows leaderless honeybee organizing

...ative group actions of the colony’s older workers, not by the queen’s individual decision. What Pierce...queen has a tremendous impact on the colony, she’s not the decision maker,” Schnieder said. “The colony is not a dominance hierarchy and, from a human per...

Newly discovered antibody may be body's natural defense against Alzheimer's

...spect of the chemical structure of their target -- not their shape," explains Weill Cornell Medical Colle... were able to confirm that the antibodies we found not only recognize oligomers of beta amyloid but also unhealthy forms of other proteins that accumulate ...

Physicist cracks women's random but always lucky choice of X chromosome

...uld happen randomly to one X chromosome’s gene and not the other. Scientists are extremely uncomfortable with this randomness and have sought a clear scientific reason as to why one X chromosome was switched off rather than the other. The observations also seem to run counter to the usual idea that th...

ASU research shows connection between testosterone, dietary antioxidants and bird coloration

...nimal.” “This study shows that testosterone may not be as costly as previously thought, so long as animals can nutritionally offset the immune detriments of testosterone. They may even experience a net health benefit as a result,” explained McGraw, who studies the functions of naturally occurring chem...

Massive herds of animals found to still exist in Southern Sudan

... Sudan, last surveyed more than 25 years ago, have not only survived but have thrived east of the Nile Ri...ve never seen wildlife like that, in such numbers, not even when flying over the mass migrations of the Serengeti,” said Fay. “This could represent the big...

Study shows lizard moms dress their children for success

...e genes that control behavior and back pattern are not linked, so a lizard could end up with a mismatch t... yellow-throated offspring. The barred pattern was not induced in non-yellow progeny. In the other pathway, the extra hormone was prompted by an abunda...

Women well informed about breast cancer, yet lacking knowledge about current treatments

...tions with their doctor. However, 86 percent were not certain they would know what questions to ask. “Communication between the patients and their physicians is so important because it empowers them to take an active role in their treatment decisions,” explained Gary Frenette, MD PhD Medical Oncolo...

Progress toward an antitumor vaccine

...nization. The production of a selective vaccine is not a trivial task, however. A team led by Horst Kunst at the University of Mainz has now found a way to bind a molecule that is typical for tumors to a carrier protein without irritating the immune system. As they report in the journal Angewandte Chemie...

CT scan reveals ancient long-necked gliding reptile

... inside the bones," says Ryan. "However, we could not determine the exact morphology of all the appendag...object to be scanned. Because the researchers did not want to cut up the sheet of rock in which the fossilized glider was embedded, they gave up total res...

Small, self-controlled planes combine plant pathology and engineering

... the College of Agriculture and Life Sciences, has not only linked agriculture and engineering with his i...and remains largely a mystery to scientists who do not have a firm understanding of its ability to travel long distances in the atmosphere. By placing anti...

Study investigates 'divorce' among Galapagos seabirds

Being a devoted husband and father is not enough to keep an avian marriage together for the Nazca booby, a long-lived seabird found in the Galapagos Islands off the coast of Ecuador. Many Nazca booby females switch mates after successfully raising a chick, according to a Wake Forest Univers...

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