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Tag: "evidence" at biology news

Poplar trees redirect resources in response to simulated attack

...eated with the hormone. "This is pretty convincing evidence that plants can respond 'passively' by redirecting...ge for later regrowth," Ferrieri said. Supporting evidence comes from the amount of carbon-11 the scientists detected in isoprene, a hydrocarbon gas that is a ...

Experiments provide proof of how traveling in groups protects insects

...erts has developed what they believe is strong new evidence that the latter theory is correct. By gluing radio transmitters -- each weighing less than half a gram -- to the backs of Mormon crickets in northeastern Utah and northwestern Colorado, Drs. Gregory A. Sword, Patrick D. Lorch and Darryl T. Gwynne sho...

U-M scientists find genes that control growth of common skin cancer

...Dlugosz cautions that there is asyet no definitive evidence that tumor stem cells exist in BCC. Inadditional studies, the researchers found that regressing BCC cellscould be reprogrammed to differentiate into various epithelial celltypes, ultimately capable of assembling fully-formed hair follicles.These resu...

Experiments provide proof of how traveling in groups protects insects

...erts has developed what they believe is strong new evidence that the latter theory is correct. By gluing radio transmitters -- each weighing less than half a gram -- to the backs of Mormon crickets in northeastern Utah and northwestern Colorado, Drs. Gregory A. Sword, Patrick D. Lorch and Darryl T. Gwynne sho...

Papers of DNA Pioneer and Nobel Laureate Francis Crick Added to National Library of Medicine’s Profiles in Science Web Site

... proteins. In 1961, he and Sydney Brenner reported evidence that the genetic code is to be read three letters at a time, evidence that made possible the full elucidation of the code by 1966. Crick then turned to developmental biol...

Gene Therapy For Parkinson's Disease Moves Forward In Animals

...inson's Research. “This is additional experimental evidence that suggests that it can be a promising approach to this disease using in vivo gene therapy, which is very applicable to humans. It even presents theoretical reasons that might solve some of the safety issues that have been raised about GDNF. But ma...

Scientists reveal molecular secrets of the malaria parasite

...vector. * Hall and scientists in Leiden identified evidence ofan unusual method of gene regulation (called post transcriptionalregulation) at the transition between the vertebrate host and themosquito. That motif regulates proteins that are switched on as theparasite enters the mosquito.Hall's group identifie...

New SARS Protein Linked To Important Cell Doorway

... the cell surface. Researchers don't have any hard evidence of orf7a's function, but they speculate that the protein's positioning could enable it to block proteins that help alert the immune system or to assist reproduced viral proteins as they make their way out of the cell. The finding exemplifies a prima...

Jumping gene helps explain immune system's abilities

... Johns Hopkins scientists hasfound the first clear evidence that the process behind the human immunesystem's r...Institute investigator."It provides the first real evidence that the genetic processes behindantigen diversity might have evolved from the activity of a jumping...

UCSD Discovery Shows How Embryonic Stem Cells Perform 'Quality Control' Inspections

... Johns Hopkins scientists hasfound the first clear evidence that the process behind the human immunesystem's r...Institute investigator."It provides the first real evidence that the genetic processes behindantigen diversity might have evolved from the activity of a jumping...

New therapy for HIV/AIDS eliminates needles and excessive toxicity

... Johns Hopkins scientists hasfound the first clear evidence that the process behind the human immunesystem's r...Institute investigator."It provides the first real evidence that the genetic processes behindantigen diversity might have evolved from the activity of a jumping...

DNA Recombination and Repair—A New Twist to RecA Function

... Julia Cox, Oleg Tsodikov, and Michael Cox present evidence indicating that filaments of the bacterial RecA protein, long known for their role in homologous recombination and DNA repair, have properties reminiscent of a molecular motor as well. RecA filaments consist of DNA helices lined with RecA protein. Re...

Gene sequencing explains bioremediation 'bug'

... Johns Hopkins scientists hasfound the first clear evidence that the process behind the human immunesystem's r...Institute investigator."It provides the first real evidence that the genetic processes behindantigen diversity might have evolved from the activity of a jumping...

New studies suggest airborne SARS transmission is possible

Two new studies present evidence that the virus causing severe acute respiratory sy...isease in the outbreak, and hence we feel that the evidence is quite strong." An editorial accompanying the Toronto study, by Tommy Tong, MBBS, of Princess Mar...

Ice core 'dipstick' indicates West Antarctic ice has thinned less than believed

...ce age, also called the Last Glacial Maximum. But evidence from an ice core extracted near Siple Dome from 1997-99, along with other calculations, indicates ice in that area has lost only 200 to 400 meters of its thickness in the last 20,000 years, said Edwin Waddington, a UW professor of Earth and space sci...

New insight into people who 'see' colors in letters and numbers

...those regions. Importantly, the researchers found evidence suggesting that synesthetes may be quite different from one another, which the researchers said "has profound implications for the studies of synesthesia that group together data from multiple synesthetes and treat them as if they all come from a hom...

New research indicates a 'troubled' greenhouse is brewing

..." Buried soils have long been known as sources of evidence of past rainfall, but Retallack says they also can be used to determine the seasonality of rainfall as well as the amount of rainfall because the spread within the profile of carbonate nodules is related to the difference in precipitation between the...

Scientists identify new model Of NK cell development

...st the first step. We feel this is the first solid evidence supporting a new model of NK cell development, but we also know that more work needs to be done to fill in some gaps." Still, the findings appear to offer important new information about NK killer cells that may ultimately be helpful in designing mo...

New RNA polymerase discovered in plants

... then along came Pol IV. Pikaard first noticed the evidence for a fourth polymerase when analyzing gene sequen... While Pikaard and his collaborators have indirect evidence that Pol IV is a distinct RNA polymerase, they still have many aspects of Pol IV to unravel. "We kn...

The Bacteria's guide to survival

... PLoS Biology, Magdalene So and colleagues present evidence that bacteria can induce changes in hosts' gene expression - and possibly keep the host cells alive longer - through tiny tugs on cell membranes. The study examined gene activity in human epithelial cells infected with Neisseria gonorrhoeae, the bact...

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