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Tag: "continuous" at biology news

Longer treatment benefits sleep apnea patients

...a benefit significantly from longer nightly use of continuous positive airway pressure (CPAP), a device to improve breathing during sleep, according to a new study supported by the National Heart, Lung, and Blood Institute (NHLBI) of the National Institutes of Health. This is the first study to identify the nig...

Now, self-healing materials can mimic human skin, healing again and again

...“In our new circulation-based approach, there is a continuous supply of healing agent, so the material could hea...ploys a concentrated polymeric ink, dispensed as a continuous filament, to fabricate a three-dimensional structure, layer by layer. Once the scaffold has been ...

Migration alert -- How tumor cells home in on the lymphatic system

...vicinity of a tumor, particularly the existence of continuous slow flow in the direction of functional lymphatics. This research could open new avenues for combating metastasis, says Swartz. “It implies that if a lymphatic was blocked, tumor cells would be less attracted to it. This means that tumor cells ...

Definitive evidence found of a swimming dinosaur

...Spain's Cameros Basin, contains the first long and continuous record of swimming by a non-avian therapod dinosaur. A team led by Rubén Ezquerra, Fundación Patrimonio Paleontológico de La Rioja, La Rioja, Spain, discovered the prints in an area long known for its abundance of terrestrial dinosaur trackways dat...

A first -- Hebrew University scientist observes brain cell development in 'real time'

... in the study also remained dynamic and capable of continuous change. This method provides a mechanism for observing, for the first time in a mammal, how a neuron develops into a rich and complex cell and how, once developed, neurons are maintained in the highly active and changing environment of the brain....

Human stem cell treatment restores motor function in paralyzed rats

...nt treatment for debilitating muscle spasticity is continuous systemic or spinal drug treatments using implanted pumps. These approaches, while effective to a degree, are often accompanied by side effects and eventual drug tolerance that lessens their efficacy. “These research findings could offer great hop...

Corals -- More complex than you?

.... Humans, on the other hand, are the product of a continuous and complicated dialogue between thousands of genes. Who has the best formula for long-term survival remains unclear. Today’s corals first appeared 240 million years ago. So far humans have barely survived for 2 per cent of the time that corals ha...

The longest carbon nanotubes you've ever seen

...for a long period of time thus, providing fast and continuous transport of the carbon 'building blocks' to the carbon nanotube growth zone," said Shanov. The carbon nanotubes are extremely long compared to predecessors--the longest is 3 millimeters beyond the prior world record. More important for manufactur...

Sleepless for science: Flies show link between sleep, immune system in Stanford study

...es had fewer sleep sessions and shorter periods of continuous sleep than did healthy flies. They basically just ...d nap." Another option was to keep the flies in continuous light. But Schneider and Shirasu-Hiza decided that an even better way would be to turn to establishe...

Paper challenges 1491 Amazonian population theories

...and one in Peru, where there is evidence of long, continuous occupation of more than 5,000 years that did not spread to the adjacent, 8 to 10 kilometer distant lakes." The findings are published in a paper titled "Holocene fire and occupation in Amazonia: records from two lake districts" that appears in a r...

'Marathon mice' elucidate little-known muscle type

...rom rapid and sudden bursts of intense activity to continuous low-intensity work, the researchers said. At one functional extreme, muscles such as the soleus--a broad, flat muscle found in the calf of the leg--perform slow but steady activities such as maintaining posture. At the other extreme, muscles such as ...

Scripps research team discovers a chemical pathway that causes mice to overeat and gain weight

...r behavior at night and during the day." During continuous monitoring of temperature and motor activity, the researchers realized that the mice without the EP3 receptors were more active during the light hours-the nocturnal mice's "night"-and, more importantly, were eating during this time. The increased act...

Researchers create artificial enzyme that mimics the body's internal engine

...lied electrons to their enzyme model in a slow and continuous way. They solved the problem by attaching the mode...ed enzymes Once Collman's group had solved the continuous electron supply problem, the scientists systematically removed each of the three active centers-phen...

The connector rotation hypothesis? Phage do not pack their DNA by rotation

...aging took place did not correspond to any sort of continuous rotational motion. The researchers concluded with more than 99% certainty that the packaging mechanism does not involve rotation. How, then, does it happen? The researchers noted that their findings are compatible with a recently proposed nonrota...

Anti-herpes treatment reduces HIV levels in women infected with both viruses

... HIV in the blood and in the vagina was reduced by continuous anti-herpes treatment over 3 months. These findings open new avenues for the prevention of HIV transmission and for the management of patients co-infected by the two viruses. In 2005, an estimated 4.1 million people were newly infected with HIV...

Microfossils unravel climate history of tropical Africa

...eans, because soils on the continent do not form a continuous archive but are often eroded. The researchers developed an entirely new proxy for the annual mean air temperature on land, based on molecules from the cell membrane of soil inhabiting bacteria. They analysed eroded soil material in a sediment core in...

Scientists unravel clue in cortisol production

...kes CYP 17 and ultimately cortisol. But it's not a continuous process, they found. "Once SF-1 binds, it leaves. A few minutes later other proteins come in and condense the DNA," said Sewer. "After that SF-1 binds again, then leaves, and the proteins cause the DNA to contract again." This cycle goes on as ...

Reactivated gene shrinks tumors

...This study provides critical genetic evidence that continuous repression of a tumor suppressor gene is required for a tumor to survive," said Andrea Ventura, an Italian postdoctoral associate in the Center for Cancer Research and first author of the paper. In normal cells, p53 controls the cell cycle. In oth...

Protein therapy may reduce infarct size in heart attack patients

...ronary angiography after stent implantation and by continuous electrocardiogram recordings) and reduced infarct size (measured 14 days after the heart attack) were observed at the 0.5 mg (infarct size 23 vs. 29.5% of the left ventricle) and 1.25 mg (infarct size 32.5 vs. 43% of the left ventricle) dose levels. ...

Stem cell therapy shows promise for rescuing deteriorating vision

...und them. "The idea was to test the cells as a continuous delivery system" to shuttle an agent known as glia...mes over years. The idea was to use the cells as a continuous delivery system, but we found they work quite well on their own." Lund has experimented with othe...

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