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Tag: "evidence" at biology news

Low oxygen likely made Great Dying worse, greatly delayed recovery

... published in Science earlier this year presenting evidence that extinction rates of land vertebrates were elevated throughout the late Permian, likely because of climate change, and culminated in a mass extinction at the end of the Permian. The event, often called "the Great Dying," was the greatest mass ext...

Scientists reveal the shape of a protein that helps retroviruses break into cells

... published in Science earlier this year presenting evidence that extinction rates of land vertebrates were elevated throughout the late Permian, likely because of climate change, and culminated in a mass extinction at the end of the Permian. The event, often called "the Great Dying," was the greatest mass ext...

Science study holds implications for gene therapy and stem cell biology

...d Hamburg University in Germany, reveals important evidence that tells us more about how blood forming stem cells regenerate. On the other hand, scientists offer caution in regards to the side effects associated with genetic engineering of stem cells. The study, whose lead author is Christopher Baum, MD, an ...

Scientists generate patient-specific stem cells, Science study says

...nimal products in laboratory procedures and better evidence that the cell lines matched the patients' cells and did not have a parthenogenetic origin, where unfertilized eggs can divide on their own. Hwang and colleagues report that the cells are chromosomally normal, self-renewing and "pluripotent" ?meaning...

Currents could disrupt ocean food chain

...ent isn't just idle speculation. A growing body of evidence suggests that it switched on and off 20 to 25 time...pt the conveyer," Schmittner said. "There is some evidence backing that up," he added. "Deep ocean sediment core samples show pebbles from land delivered by th...

SuperLigands - a database of ligand structures derived from the Protein Data Bank

...nimal products in laboratory procedures and better evidence that the cell lines matched the patients' cells and did not have a parthenogenetic origin, where unfertilized eggs can divide on their own. Hwang and colleagues report that the cells are chromosomally normal, self-renewing and "pluripotent" ?meaning...

Retrovirus struck ancestors of chimpanzees and gorillas millions of years ago, but did not affect ancestral humans

...t three to four million years ago, but there is no evidence it infected ancestors of modern-day humans, according to research by genome scientists. The virus struck after humans had split off the evolutionary tree from primates, researchers said. The infection may have played a role in the evolution of such g...

Important discovery about second most fatal cancer

...ales # More common in right side of colon # Little evidence of tumour immunity # Frequent mutation of an oncog...ition to develop DNA methylation. There is already evidence that subjects with colorectal cancer showing DNA methylation are more likely to have a family histor...

Molecular thermometers on skin cells detect heat and camphor

... journal Science, the team is reporting definitive evidence that TRPV3 is indeed a temperature sensor. They ha...mans and other mammals, and there has been growing evidence in the last few years that these proteins are "molecular thermometers" that detect hot and cold temp...

What the eye doesn't see

The first experimental evidence that birds can be deceived by camouflage in the sa...m the University of Bristol provides the strongest evidence to date that disruptive patterns do indeed protect insects from detection by birds, the predator mos...

15-year hunt finds cause of pseudothalidomide syndrome

...erlying biology, Jabs notes. Although there's some evidence that thalidomide prevents blood vessel growth, it's not clear why. If the underlying biology is related somehow, then thalidomide might affect chromosomes and cell division like ESCO2 in Roberts syndrome, Jabs speculates. During normal cell division...

Primates on the brink

...ecies also are under extremely grave threat. "All evidence tells us that the first extinctions among Africa's primates will occur among the red colobus," said Thomas Butynski, director of CI's Eastern Africa Biodiversity Hotspots Program. "Miss Waldron's red colobus in Ghana and Ivory Coast, and Bouvier's re...

Precise Timing Enabled Pig-to-rat Transplants To Cure Diabetes

... Professor of Renal Diseases in Medicine, presents evidence that he and colleague Sharon A. Rogers, research instructor in medicine, harvested the embryonic pig tissues at precisely the right point in their development. "When we again harvested the transplant tissues 28 days after fertilization, it reproduce...

Scientists analyze chromosomes 2 and 4

...erts" known in the human genome and uncovered more evidence that human chromosome 2 arose from the fusion of t...ue to humans and chimps. Scientists have tentative evidence that the gene may be used to make a protein in the brain and the testes. The team also identified "h...

Nanobacteria in clouds could spread disease, scientists claim

...lent in the terrestrial environment and that their evidence is compelling for the existence of these nano-organisms, even in the stratosphere. In humans, nanobacteria have now been identified on four continents, they add. Dr Sommer and Professor Wickramasinghe further suggest that nanobacteria's involvement ...

Alcohol consumption disrupts breastfeeding hormones

...ty of her milk, she needs to know that there is no evidence to support this claim. In fact, what happens is qu...ennella points out, "There was no valid scientific evidence to support this claim." To address this research deficit, the current study, reported in the April ...

Young Blood Revives Aging Muscles, Stanford Researchers Find

...unt to a roll of the dice. What's more, there's no evidence that the same blood component is responsible for reviving the different types of cells. "Another approach is to pick factors that are good candidates and see if any of them or some combination recapitulate the effect of the younger blood," Rando sai...

At the molecular level, the predator is the prey

...tate University and the University of Utah present evidence in this week's Nature that a toxin produced by the rough skinned newt, Taricha granulosa, has forced several evolutionary changes in the garter snake Thamnophis sirtalis or, more specifically, in the snake nerve cell protein that endures the toxin's ...

Natural Killers Could Lead to New Hepatitis Treatments

...y of artificially induced hepatitis. “So, all the evidence we can obtain so far points to CXCR6 being involved in promoting survival of these NKT cells when they get into the environment of the liver, and that's how the cells tend to accumulate there,?said Littman. “Our data don't support a critical role of ...

Bugs, even 'bad' ones, can be educationally beneficial, new book says

..." Waldbauer said. For example, he described recent evidence of how a new species of fruit fly is evolving based on how its diet differentiates it from other fruit flies. Waldbauer uses examples from history, his career and conversations with his entomologist colleagues to illustrate what we can learn from ba...

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