upon 2 5

Tag: "upon" at biology news

Scientific issues associated with carbon-neutral energy sources such as cellulosic ethanol

...tled, On the Influence of Carbonic Acid in the Air upon the Temperature of the Ground in which he argued that increased concentration of atmospheric CO2, such as that caused by combustion of fossil fuel, would lead to the warming of the earth," Somerville commented. "It is apparent that he [Arrhenius] was...

Non-coding RNAs help silence the mammalian transcription

...ng, or the differential expression of a gene based upon which parent it has been inherited from, is integral to normal growth and development. Two human disorders, Prader-Willi and Angelman syndromes, result from the deletion of the identical portion of chromosome 15. Imprinting determines which disorder ...

New bird flu drug promises to beat the problem of resistance

...miflu for ordinary forms of flu. Although acting upon the same target on the influenza virus as existing treatments, the new drug molecules being developed are specific for a part of the virus that is unable to mutate (change), which means it should be impossible for the influenza virus to develop resis...

Global warming may have damaged coral reefs forever

...l. The team, led by the University of Newcastle upon Tyne, and which comprises researchers from the UK, Australia and the Seychelles, publishes its findings today, Monday May 15, in the Proceedings of the National Academy of Sciences. The research showed that, while the 1998 event was devastating in ...

Neural stem cell gene plays crucial role in eye development

...s that normal development of the eye is contingent upon having the right amount of SOX2, expressed at the right time and place. "Too little SOX2 expression results in the neural stem cell pool to aberrantly differentiate into neurons during development," Pevny said. "This disrupts the normal maintenance o...

Scientists identify gene involved in stem cell self-renewal in planaria

...row into a complete planarian. The flatworm relies upon a population of stem cells to accomplish this remarkable feat; recent work sheds light on how planarians maintain these stem cells throughout their lives. In a paper to appear in the August issue of the journal Developmental Cell, scientists show th...

Surprise finding for stretched DNA

...nformation into the production of proteins depends upon the mechanical properties of the double helix. Th...gment," Bustamante said. "The overwinding observed upon stretching, implies that contrary to the held belief, the stretch-torsion coupling constant of DNA i...

Polynesia explorers created worldwide web of scientific knowledge

...ong, lonely voyages" for the fame they might claim upon their return.Their bosses, the voyage sponsors, tended to be high-ranking naval officers, ministers of state or monarchs ?wealthy men who paid them to be reporters, but who also had their own "conceptions of truth." In such a dynamic, travelers were ...

South Pacific plant may be missing link in evolution of flowering plants

...e put in place to help prevent any adverse impacts upon dolphin populations. Operations should be restricted to low tide and suspended during calving season, an exclusion zone should be monitored before any activity starts and marine work should cease if a dolphin enters the work area. Other innovative id...

Dolphins at risk

...e put in place to help prevent any adverse impacts upon dolphin populations. Operations should be restricted to low tide and suspended during calving season, an exclusion zone should be monitored before any activity starts and marine work should cease if a dolphin enters the work area. Other innovative id...

Combination therapy with a monocloncal antibody and a vaccine leads to tumor rejection

...nor their regulatory activity, which suggests that upon completion of this therapy these cells would still be able to control possible adverse immune responses. ...

Basic work on E. coli identifies two new keys to regulation of bacterial gene expression

... of RNA from information contained in DNA, depends upon previously underappreciated sections of both the DNA promoter region and RNA polymerase, according to work done with the bacterium E. coli and published today (June 16) in the journal Cell by a team of bacteriologists from the University of Wisconsin...

Researchers find cause of frontotemporal dementia

... line to navigate! Thanks to this finding, though, upon a doctor's request, a genetic study can be done on FTD patients and their family members if they so desire. ...

Recombination protein dynamics observed with single monomer resolution

...moves from the green dye to the red dye, depending upon the distance between them. The researchers then measure the brightness of the two dyes simultaneously. The changing ratio of the two intensities indicates the relative movement of the two dyes, and therefore the motion of the molecule or its change ...

Tiny airborne particles are a major cause of climate change

...cting our climate. Cloud formation is dependent upon the presence of small amounts of aerosols such as sea salt and desert dust. These tiny particles serve as the seeds around which water vapor in the air condenses, forming tiny water droplets that rise as they release heat. As the small droplets rise,...

Spinal cord bridge bypasses injury to restore mobility

...ability to breathe or move arms or legs, depending upon the injury site. Silver said the medical community also assumed that the cut axon tips died when they hit the scar wall. In prior research in his lab by his graduate student, Tom, it was discovered that axons are alive and continue to attempt to g...

Septum keeps neurons in synch, can reduce epileptic seizures by 90 percent

...sy new options," he said, but progress will depend upon funding, he added. Next steps The researchers will repeat the study using animals that are awake and mobile, though it is more difficult to record the brain's discharges in freely moving animals. Then the research can move to humans. ...

The molecular mechanism of a diabetes vaccine revealed

... to identify the exact immune cells that p277 acts upon and its mechanism of action. Autoimmune diseases occur when certain T cells in the immune system attack the body's own cells and tissues. The scientists discovered that p277 directs the activity of the immune system in two ways. First, the p277 pe...

Elephants, large mammals recover from poaching in Africa's oldest national park

...rld before a wave of unrest and poaching descended upon the region. Since the 1960s, the park's populations of elephants, hippos, and buffalos have declined dramatically, with the heaviest levels of poaching occurring in 1980s and during the past 10 years since the beginning of the country's civil war in ...

Sandia work launched on space shuttle shows live cells influence growth of nanostructures

...els' leads to stress, cracks, and rapid cell death upon drying. Already launched on the space shuttle The incorporated cells of the Brinker group are self-sustaining - they do not need external buffers and even survive being placed in a vacuum. To study their use as cell-based sensors for extreme en...

1 2 3 4 5 6 7 8 9 10