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Tag: "spike" at biology news

Discovery could lead to better control of hemorrhagic fever viruses

... Later, they broke the cells open and isolated the spike protein and the cellular protein to which it had attached itself. Then, using a technique called mass spectrometry, they analyzed this attached cellular protein to determine its identity. The receptor, identified in Choe's lab by Jonathan Abraha...

Fitness has fallen since the days of Ancient Greece

... They had a strong keel, taken forward into a huge spike covered in bronze plates, which meant they could ram and hole enemy ships -- a new technique in naval warfare. To ensure sufficient impact to cause damage, the triremes had to reach great speeds -- so were designed with more than three times more row...

In-shell vaccine for chick disease

...egg. The scientists have extracted a so-called spike protein from a pathogenic virus strain which triggers an immune response, and incorporated it into a harmless non-pathogenic strain. Dr Paul Britton, Head of the Coronavirus Group at IAH Compton, explained, "This hybrid virus was able to induce immun...

HIV exploits competition among T-cells

...f HIV infection. The first is marked by an initial spike in virus production that's immediately followed by dramatic drop as the immune system recognizes the threat, mounts a defense and destroys most of the invading viruses. The second phase is a long period of clinical latency that can last up to 10 year...

Study finds the air rich with bacteria

...so with Berkeley Lab's Earth Sciences Division. "A spike may not be due to a biological attack, but to normal weather fluctuations that draw bacteria up from their natural reservoir." In this way, bacterial censuses can help explain whether a pathogen's presence is natural or indicative of a biological...

New angiogenesis finding may help fight cancer growth

... in the United Kingdom, has found that NK-B levels spike in preeclampsia, and the new understanding of NK-B's role in angiogenesis suggests that faulty blood-vessel formation may be to blame. Because NK-B prevents endothelial cells from organizing into blood vessels, Bresnick says, "Maybe excess levels...

Carnegie Mellon scientists show brain uses optimal code for sound

... any song by recording what note to press when the spike code encodes any natural sound in terms of the precise timings of the elemental acoustic features. Remarkably, when the researchers derived the optimal set of features for natural sounds, they corresponded exactly to the patterns observed by neuroph...

Scientist measures role of science's coolest player: The snow

...ce of snow cover, global temperatures would likely spike by about eight-tenths of a degree Celsius. That increase represents as much as a third of the warming that climate change experts have predicted, should levels of heat-trapping greenhouse gases double. "This was not just a what-if question," says Va...

Researchers use brain scans to predict behavior

...rusted." Researchers based this speculation on a spike in brain activity partially found in the rewards system in the frontal lobes. "The rewards system is involved in regulating behavior based on previous experiences of rewards and punishments," d'Avossa says. "It also may help us build up predictions o...

Learning how SARS spikes its quarry

...s of infection. The structure, which shows how the spike protein grasps its receptor, may help scientists l...ey steps in SARS infection occurs when the virus's spike protein attaches to a receptor on the surface of target cells. Attachment of the spike protein permi...

Study uncovers dirty little secret: Soil emissions are much-bigger-than-expected component of air pollution

...ns in the mid-latitudes of the Northern Hemisphere spike during the growing season, spurred by warmer temperatures after a cold winter, but also perhaps magnified by fertilizer use. "The soil emissions were much larger than we expected," she said. "The biggest areas were the dry topical regions like the S...

Penguin chicks exposed to human visitors experience spike in stress hormone

... large number of human visitors show a significant spike in levels of a stress-related hormone compared to chicks hatched in areas not visited by humans, a University of Washington research team has found. It wasn't until chicks with limited human exposure reached 40 to 50 days old that they showed a stre...

Hirsute Or Hairless? Two Proteins May Spell The Difference

... Working with developing mouse embryos, they saw a spike in Snail expression on embryonic day 17.5, coinciding with hair bud formation, enhanced cell proliferation, and the down-regulation of E-cadherin. Artificially sustaining Snail expression in the skin of transgenic mice caused abnormal levels of cell ...

New research indicates a 'troubled' greenhouse is brewing

...ent movie "The Day After." "During the greenhouse spike of 55 million years ago, tropical mangroves and rain forests spread as far north as England and Belgium and as far south as Tasmania and New Zealand," Retallack says. "Turtles, alligators and palm trees graced Ellesmere Island in the Canadian Arctic,...

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