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Tag: "changing" at biology news

Disappearing arctic lakes linked to climate change

...lso become drier as the permafrost degrades. "The changing lakes are a consistent, measurable indication of the overall changes to hydrology in the Arctic," said Hinzman. "The loss of surface water will inevitably impact local ecosystems, which will have a cascading effect. Changes could include loss of migr...

Scientists find a maturity gene in fly

...amorphosis should begin, when the fly should begin changing from juvenile to adult. If the gene was crippled, fly larvae started metamorphosis too soon, and became prepupae that were lighter and shorter than normal. * The gene also is needed for the early stages of metamorphosis to proceed; it plays a ro...

MWG Biotech expands siMAX?siRNA portfolio with new scales, lengths and design tools

...amorphosis should begin, when the fly should begin changing from juvenile to adult. If the gene was crippled, fly larvae started metamorphosis too soon, and became prepupae that were lighter and shorter than normal. * The gene also is needed for the early stages of metamorphosis to proceed; it plays a ro...

Genetic variation alters response to common anti-clotting drug

...searched for common DNA variations responsible for changing the gene's activity and the amount of protein it made. "We did find genetic variations that appear to turn up the gene or turn it down," said Rieder. By matching the genetic variations to actual warfarin doses, the scientists discovered that people...

Drugs from the deep blue

...aping responses, activating or inhibiting enzymes, changing the shape of the cell, triggering cell division," Pessah said. Calcium is also a key signal in both fertilization and programmed cell death, he said. Pharmaceuticals that affect calcium channels range from drugs given to organ transplant patients to ...

A 'dimmer switch' for genes

... shape, but with the versatility to respond to the changing needs of the cell, however subtle." The findings have long-term implications for the study of all proteins, because, according to Graves, any protein has the potential to be organized this way, with structured and unstructured regions that work toge...

What Makes The Brain Tick, Tick, Tick: Researchers Gaining New Insights Into Brain's Internal Clock

...ard in time to predict something, without actually changing your position in space." Understanding the machinery of interval timing is profoundly difficult because it is "amodal," said Buhusi and Meck. That is, the interval timing clock is independent of any sense -- touch, sight, hearing, taste or smell. Th...

DNA size a crucial factor in genetic mutations, study finds

...re interested now in keeping the size constant and changing the shape,'' Kool adds. ...

Beach pollution is worst during new and full moon

...fficult, with levels of bacteria in a certain area changing in just a few minutes. For the new study, the researchers examined monitoring data compiled for beaches throughout Southern California, keeping track of tidal patterns and analyzing them for concentrations of enterococci -- bacteria that allow scien...

Researchers find gland that tells fruit flies when to stop growing

...ve us the size shifts that we had hypothesized was changing the size of the prothoracic gland. Enlarging the organ made the animals small, and vice versa," Mirth said. "It seems to be a nutrition-related phenomenon. You sort of trick the fruit fly into thinking it is bigger than it really is." Enlarging the ...

Zebrafish may hold key to improved cancer research

... including the genes involved. "Zebrafish are now changing the face of cancer research," Spitsbergen said. "They can be managed in a laboratory almost anywhere, they reproduce quickly, lend themselves well to genetic manipulation, can efficiently test high numbers of possible drug therapies, and might tell y...

New amphibian species result from exploration, not from rule changes

...nsequence of increasing exploratory effort, not of changing criteria for recognizing a species, or "taxonomic inflation." The authors of the new analysis, Jörn Köhler of the Hessisches Landesmuseum Darmstadt, Germany, and colleagues, conclude that "Taxonomic exploration is still desperately needed to avoid mi...

Scientists must offer solutions for conserving tropical forests in a rapidly changing world

...mpacts on the world increase, tropical forests are changing in many different ways. Forests are being cleared...des the scientist. Tropical forest landscapes are changing rapidly in the eyes of scientists working on tropical monitoring plots around the globe, while human...

Breath of the dragon: ERS-2 and Envisat reveal impact of economic growth on China's air quality

...al variation and thereby determine objectively the changing atmospheric composition." SCIAMACHY: surveying the world in six days SCIAMACHY is a spectrometer, and it works by measuring sunlight - either transmitted, reflected or scattered by the Earth's atmosphere or surface in the ultraviolet, visible a...

Prostate cancer uses Wnt signaling proteins to promote growth of bone tumors

...ronounced "wints") to establish itself in bone. By changing the amount and activity of Wnt proteins, prostate ...e amount of active DKK-1, it blocked Wnt's signal, changing prostate cancer cells from an osteoblastic to a highly osteolytic cell line." To test their hypothe...

War on terror meets war on cancer

...rn details about prehistoric environments, such as changing temperatures over time. In recent years, Ehleringer pioneered the use of stable isotopes to study what has been dubbed "the ecology of terrorism." He has helped the Central Intelligence Agency, Federal Bureau of Investigation, Secret Service and Dru...

A new window into structural plasticity in the adult visual cortex

...ys in response to new experiences, for example, by changing the firing pattern and responses of neurons. But it has remained an open question whether structural changes accompany this functional plasticity. In a new study published in the open-access journal PLoS Biology, Wei-Chung Allen Lee and colleagues re...

Oil spills and climate change double the mortality rate of British seabirds

...of Sheffield has shown that major oil spills and a changing climate have had a far greater impact on populations of British sea birds than was previously thought. A team led by Professor Tim Birkhead from the Department of Animal and Plant Sciences at the University of Sheffield, shows for the first time th...

Male elephants woo females with precise chemistry

...rontalin would be made by elephants, but by merely changing the ratios of frontalin's enantiomer composition, "you're actually changing the message signals, and you end up having a signal that is essentially different," Greenwood added....

New study expands understanding of the role of RNA editing in gene control

...a specific occurrence of the nucleotide adenosine, changing it to inosine in the precursor molecule for miRNA-142, expressed in hematopoietic tissues. This editing had the effect of preventing a key miRNA processing enzyme called Drosha from cutting the precursor miRNA molecule at a critical step in that proc...

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