Tag: "wave" at biology news
A test case for DNA barcodes to identify species
Faced with what Ed Wilson calls the "worst wave
of extinction since the dinosaurs died," the need for a fast and easy way to identify species has never been greater. With too few specialists to do the job, biologists are looking for high-throughput tools that can rapidly and accurately identify in...
New fossil sheds light on old mystery
... the prey of an attack but also creates a pressure wave
that could push the prey away. Fish and some turtl...ng a suction force that would swallow the pressure wave
created by the lunging head, along with the prey. "The unusual neck morphology of Dinocephalosaurus ...
A long-necked sea predator from China described in Science
...enough to allow the animal to swallow the pressure wave
that it created as its head lunged forward though the water. By swallowing its own pressure wake that would otherwise signal its approach, the predator may have executed almost undetectable strikes at unsuspecting fish. While it's difficult to add m...
New sign language suggests children create language's fundamentals through learning
...rs of NSL, ranging from four to 45 years old. Each wave
of children that enters the community develops NSL further, making it more complex and versatile, and signing with greater speed and fluidity. "It's an unusual community, sort of upside-down, in the sense that the children lead the way. The children...
Two Virginia Tech energy-related inventions win R&D 100 awards
...center director Anbo Wang explains. "Measuring the wave
activity helps determine the capacity of a reservoir." The new fiber optic sensor systems are about the diameter of a human hair and can reach depths exceeding 10,000 feet. The tiny sensors can be hydraulically deployed through a small tube, whic...
Newborns have ear preferences, too
...ad of data" on newborn babies' inner ear and brain wave
responses to different kinds of stimuli. She and Sininger analyzed the data on infants' responses to two different kinds of 'otoacoustic emissions.' Otoacoustic emissions are sounds that are generated by the inner ear itself in the process of heari...
AGU journal highlights - 29 July 2004
... gas in the thermosphere. Suchhigh-frequency radio wave
induced emissions are identical to those created innatural auroras. The authors were able to repeatedly create the emissions, which survive for nearly one minute before collapsing as they descend in altitude. Theirexperiment provides evidence for th...
Brain serotonin enzyme finding might explain psychiatric disorders
... neurons. When stimulated, neurons fire, sending a wave
of electrical charge from one end to the other. To bridge the gap between nerves, the neurons release chemical neurotransmitters, including serotonin, that set off an impulse in receiving neurons. Once the original cell has passed its message on, it ...
ORNL adds three R&D 100s to DOE lab-leading total
...ectrometry and gas chromatography/surface acoustic wave
devices) because of its sub-part-per-trillion sensitivity and high selectivity, direct vapor sensing, low power consumption (the instrument uses a 9-volt battery), less than one-second response time, stability, compact size, and low cost. SniffEx wil...
Measuring blood sugar with a wave of the arm
...sor that monitors blood sugar levels with a simple wave
of the arm. The sensor, which is smaller than a di...iates. "Whenever a reading is needed, a person can wave
their hand or arm in front of a reader that will automatically detect the sensor," Grimes says. The ...
Targeted therapy for lung cancer patients shows promise in extending lives
...Chicago, are studying what they believe may be the wave
of the future for treating patients with advanced ... today. For the next two decades, this will be the wave
of the future in treatment." Patients with stage IV lung cancer who receive one course of chemothera...
Imaging study shows brain maturing
...current study, and colleagues, discovered a second wave
of overproduction of gray matter just prior to pub... Rapoport and colleagues discovered an exaggerated wave
of gray matter loss in teens with early onset schizophrenia. These teens, who became psychotic prior...
Motion that powers sperm provides key to unravelling rare genetic disorder
...m used to remove mucus from the lungs or power the wave
like motion behind sperm, but they also function a...ey must be synchronised so they work together in a wave
like motion. A second type of cilium which is much more common but don't beat together, serves to se...
Kinase backgrounder: Iressa discovery part of major kinase project at Dana-Farber
...rber's George Demetri, MD. It is now viewed as the wave
of the future in cancer drugs. Unlike standard chemotherapy drugs, kinase inhibitors are so specific that they spare normal cells and tissues. As a result, their side effects are much milder, and they can be taken orally rather than needing to be inj...
New research explores 'early bird' and 'night owl' sleep patterns
...y examined 24-hour variations in the animals' slow wave
sleep, activity and changes from rest to activity....y shown distinct variations in the pattern of slow wave
sleep between some strains. This study investigated differences in circadian slow wave
sleep and ac...
Physics tip sheet #41 - April 5, 2004
... pattern of waves on the opposite side. At certain wave
frequencies, negative refraction caused the waves to form an image of the source on the far side of the cylinders. In addition to observing this "superlensing" effect, the researchers found a band gap, a range of frequencies of waves that won't propa...
Survey reports fall in stem cell transplants for breast cancer
... results from phase III studies become available a wave
of pessimism began to appear and the numbers undergoing high-dose chemotherapy began to drop. Most recent results remain ambiguous and the value of stem cell transplant in breast cancer still needs to be determined in selected categories. But, it mig...
St. Jude shows how disorderliness in some proteins lets them interact with a diversity of molecules
...netic resonance spectrometry, which combines radio wave
emissions and a powerful magnetic field to determine the structure of proteins suspended in solutions, the team determined the shape of p27 when it was unbound. In order to study the interaction between p27 and Cdk2-cyclin A, researchers in the St. J...
Migraine mouse provides insight into neurobiology of devastating headaches
...ra. "Previous studies have indicated that CSD is a wave
of intense neuronal activity along the surface of the brain, followed by a long-lasting neuronal suppression. Our results suggest that in the migraine brain cortical hyperexcitability results in an increased susceptibility for CSD and aura," explains...
Should publicly funded research be free and available to the public?
...e content. Is "open access" science publishing the wave
of the future, or will subscription-based research journals remain the dominant source for peer-reviewed science? In the following essays, two Stanford University scientists at the center of the controversy offer their perspectives: Patrick Brown, pr...
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