Tag: "speed" at biology news
MIT creates 3-D images of living cell
...fractive index, which is a measure of how much the speed
of light is reduced as it passes through the material. The higher the index, the slower the light travels. The researchers made their measurements using a technique known as interferometry, in which a light wave passing through a cell is compared ...
Cardio exercise benefits in male vs. female hearts
...el. Each mouse's daily distance, time, and average speed
were recorded. Their hearts were monitored using an echocardiograph to better evaluate any cardiac changes during the course of the study. They also isolated and analyzed the RNA of each mouse to look at any changes at the molecular level. Results...
Story tips from the US Department of Energy's Oak Ridge National Laboratory, August 2007
... Ridge National Laboratory researchers tripled the speed
of a popular biomolecular simulation package using standard programming languages on a system offered by SRC Computers. While field-programmable gate arrays, which are a different type of logic chip than traditional microprocessors, are traditionally...
How cells change the pace of their steps
...iscovered how cells of higher organisms change the speed
at which they move, a basic biological discovery t...lls. The scientists discovered that the crawling speed
of Dictyostelium is not controlled by the sticking strength of the adhesion points, but rather by th...
New databases put wings on search for bipolar risk genes
...c online database opening this week should greatly speed
efforts to find genes linked to increase risk of bipolar disorder. The Bipolar Disorder Phenome Databasea joint project of Johns Hopkins Psychiatry and the National Institute of Mental Healthis the first of its kind, offering detailed descriptions o...
UF to lead research on life-threatening fungus
... the fungus and improvethe diagnostic accuracy and speed
of tests used to detect aspergillosis.The repository will include samples from patients with confirmedinfections that will be compared with samples from patients whosediagnosis is less clear and with samples from patients who are athigh-risk but not ...
Reading ability protects brain from lead exposure
... The workers underwent several cognitive and motor speed
tests and a measure of reading ability. The resea... ability. In contrast, the effect of lead on motor speed
was comparable in both groups as cognitive reserve does not apply to motor speed, said study author ...
Accident-prone? Scientists link brain function to knee injuries
... significantly slower reaction time and processing speed
and performed worse on visual and verbal memory te...up. These results suggest that slower processing speed
and reaction time, as well as lower visual and verbal memory performance may predispose certain indi...
What determines the speed at which birds fly?
...verturn the general assumption that maximum flight speed
of a species is solely determined by such rules. Flight speed
doesnt just depend on the size of the bird (mass and wing loading), but also reflects functional con...
Geologists witness unique volcanic mudflow in action in New Zealand
...ecially in populated areas, because of their great speed
and mass," said William Leeman, NSF program director for petrology and geochemistry. "They can flow for many tens of miles, causing catastrophic destruction along their path. The 1980 eruptions at Mount St. Helens, for example, resulted in spectacula...
Chitin from lobster shell shows great healing and bio-stimulant properties
..., treated seeds showed significantly higher growth speed
and percentage of successful germination when compared to non-treated seeds. In Prof. Peniches words, the research group concluded that "chitosan works as a bio-stimulant in tomato seed treatment by producing better seed germination and greater pla...
A walking robot goes mountaineering
...lives up to its name it holds the world record in speed
walking for dynamic machines. Now its inventors have expanded its repertoire. With an infrared eye it can detect a slope on its path and adjust its gait on the spot. Just as a human, it leans forwards slightly and uses shorter steps. It can learn thi...
Research team discovers gallstone gene
...uency of 8.6 per cent. Cholesterol pump at full speed
"The mutation concerns what is known as the ABCG8-gene," Dr. Gruenhage explains. "It contains the instructions for building a pump responsible for transporting the blood lipid cholesterol from the liver into the bile ducts." Most of the gallstones...
Researchers use new approach to predict protein function
...unknown function, Gerlt said. These methods will speed
the task of identifying the biological roles of some of the hundreds of thousands of proteins whose functions have not yet been discovered. Rather than trying to do (laboratory) experiments on 30,000 compounds to determine if they are substrates, w...
A stepwise retreat: How immune cells catch pathogens
...the scientists for the first time to determine the speed
and the force of the retraction and revealed that each individual retraction step is 36 nanometres long. These parameters match the properties of a class of proteins called myosins suggesting them as the driving force of filopodia retraction. Myosins...
'Virtual' mouse brains now available online
...rnia at San Diego -- are connected via a very high speed
network with each other as well as with the San Di...a standardized fashion and made available via high speed
web connections. High resolution magnetic resonance imaging -- which the researchers call "MRI his...
Coaching computer canines in clambering
...al in the next phase of the study is to triple the speed
and double the difficulty of the terrain - have the dogs not just traverse rocky ground, but climb rocky ground with a sharp slope. If that can be achieved, he says, the programming will move over into bigger mechanical dogs. Schaal is competing ...
Global warming is evaporating Arctic ponds, new study shows
.... We now think we have been overly optimistic the speed
and magnitude of environmental changes are worse than even we imagined!...
Doing nature one better: Expanding the genetic code in living mammalian cells
...easing the size of the thread had an effect on the speed
of inactivation" We introduced mutations into the thread, so it would be too big to fit through the hole, says Wang, but we couldnt see a difference with natural amino acids. Adding even bulkier, artificial amino acids provided the answer. Now the ...
Discovery could help bring down price of DNA sequencing
... nature of the resistive force that determines the speed
of the DNA as it moves through the nanopore, which...oming from fluid friction, which could explain the speed
measurements taken in experimental studies. In Ghosals explanation, the DNA pulls some of the flui...
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