Tag: "rotating" at biology news
Strange ocean wave patterns raise questions about beach erosion
...found regions where the water near the surface was rotating
in one direction -- say, clockwise -- and the water just a meter or two below it was rotating
counterclockwise. Taken together, the unusual patterns make for a more complicated picture of water ...
Model simulates dynamics of heart rhythm disorders
...es within minutes. Spiral-shaped electrical waves rotating
at a high frequency can result in a more rapid contraction of the heart. Ventricular fibrillation is caused by spiral waves degenerating into a chaotic pattern of many small waves. Ten Tusscher demonstrated that in a healthy heart, stable three-dimen...
Study in Royal Society journal on sense of fairness in chimpanzees
...consisting of a cable suspended from the edge of a rotating
disk with a mass (drogue) attached to its lower en...less than its period of rotation. The stability of rotating
cable and string systems is important for textile yarn spinning systems, and when drogues are towed ...
The circadian clock: Understanding nature's timepiece
...s it takes about a day to fully adjust. Workers on rotating
shifts are constantly struggling to adapt and they...le, one study found that nurses who work nights or rotating
shifts are at greater risk for developing breast cancer than their counterparts on regular day shift...
Light scattering method reveals details under skin
...cular direction, and using a digital camera with a rotating
polarization filter to image the light scattered from the sample. Researchers manipulated the polarization to minimize light scattered from the rough skin surface, and positioned the light source in multiple locations to separate out, and delete, lig...
The ultimate spa: embryonic body wash controls left-right development
...ach cell in the ventral node has a single, rapidly rotating
thread (cilium) projecting from the cell surface. ...viously demonstrated that the ventral node and its rotating
cilia influence the left-right body plan, but until now no-one knew the mechanisms involved. In the...
Scientists journey to southern Africa to unravel the secret world of elephant communication
... for conservationists. Researchers have found that rotating
helicopter blades generate low-pitched noises, and possibly seismic vibrations, that can disrupt and frighten wild herds located far away. David Larom and others argue, therefore, that the use of helicopters in areas inhabited by elephants should be ...
Holographic movies show promise for medical, military applications
... a table-top black box, while nearby, a video of a rotating
human heart hangs suspended in a tank of gooey gel. These images the first true, three-dimensional, holographic movies are the brainchild of Dr. Harold "Skip" Garner, professor of biochemistry and internal medicine at UT Southwestern. While such ...
Scientists create artificial cricket hairs
...irection. Airflow causes a drag force on the hair, rotating
its base and firing specific neural cells, which allows the cricket to pinpoint low-frequency sound from any given direction by using the combined neural information from all the sensory hairs on the cerci. Physicists at the University of Twente in t...
'Win-win' economic strategy for mobile PET/CT imaging reported at SNM's 52nd Annual Meeting
... to four regional hospitals within the system on a rotating
schedule. The health system contracted with a local trucking firm for transport and maintenance of the mobile unit. PET is a powerful medical imaging modality that noninvasively traces molecular and functional processes in the body. PET images can mo...
Programming organic transistors with light; the unusual origin of peacock brown; rotating nanowires
...8.cfm ). The researchers used electrodes to create rotating
electric fields that spun the wires suspended in water. In some case the wires were attached to a substrate, creating minuscule fixed motors. In other cases, the wires were unattached and simply spun freely in the water. The researchers spun gold, ...
To translate touch, the brain can quickly rearrange its sense of the body
...nts felt within seconds that their right elbow was rotating
away from the body, even though the arm was actually quite still. If subjects held their left index finger with their right hand while this happened, they felt their left index finger getting longer as they felt their arm move. The team then tested h...
The body's biological clock: alcohol may lead to physiological anarchy
...ernal clocks, that altered circadian rhythm due to rotating
shift work and traveling over time zones may increase the propensity of alcohol-drinking behavior, and that chronic drinking may increase the risk for sleep disturbances, depression, compromised immune function, and increased incidence of certain for...
Illinois researchers to play key roles in study of emergence of life
... Theoretical Biology Institute at Arizona State. A rotating
writer-in-residence position also is included to help disseminate information about the research in various formats, including an outreach program for students in kindergarten through high school. A special symposium for primary and secondary educato...
New genetic test can detect clam disease
...s free of the disease. One possible remedy may be rotating
shellfish crops, much like farmers do on land....
Recreating 'Flowers for Algernon' with a happy ending
...by training the mice to balance while running on a rotating
log, which gradually increased in speed. At first, the NF1 mice would jump off as the log spun faster. But statin therapy enabled the NF1 mice to perform as well as their normal counterparts. "This is mind-blowing we think we have a real fundame...
NJIT mathematician receives Fulbright to study thin film science in Argentina
...know more about how to reach uniform coverage of a rotating
silicon surface with a thin film polymer. Kondic hopes his work in Argentina will shed more light. To achieve results, Kondic will use large scale numerical simulations to analyze the problems and find solutions. These simulations will be performe...
JCI table of contents: December 15, 2005
...over- and under-winding. With nearly 6 feet of DNA rotating
at high speed and being twisted and folded into a microscopic space during cell replication, our cells require several systems or "checkpoints" for interrupting the cell cycle if something goes wrong. In normal cells, the checkpoint kinase ATM (ataxi...
Engineered heart tissue offers insights into irregular heartbeats, defibrillator failure
...tting pulses. "In the beginning, there is a single rotating
wave -- the 'culture dish' analog of ventricular t...cell cultures that electric pulses sometimes break rotating
waves rather than block them." Engineered cardiac tissues also might prove a useful testing ground f...
New survey sheds light on MS Therapy
.... Patients should be advised of the importance of rotating
injection sites. Female patients should be warned about the potential risk to pregnancy. Cases of anaphylaxis have been reported rarely. Please see full Prescribing Information for more information. Berlex, a U.S. affiliate of Schering AG, Germany...