waves 2 1

Tag: "waves" at biology news

New insight into people who 'see' colors in letters and numbers

...of the synesthetic colors. In fMRI, harmless radio waves and magnetic fields are used to map regions of higher blood flow in the brain, which reflects higher activity in those regions. Importantly, the researchers found evidence suggesting that synesthetes may be quite different from one another, which th...

Devising Nano Vision for an Optical Microscope

...at NIST uses a set of dynamically engineered light waves optimized for particular properties (such as angular orientation and polarization). How this structured illumination field—engineered differently to highlight the particular geometry of each type of specimen—scatters after striking the target can rev...

Wisconsin researchers identify sleep gene

... of groups of neurons, easily detected by EEG. The waves are slower during deep sleep and faster during wak...enes and potassium channels. And we know that slow waves must be generated by changes in the excitability of neuron cell membranes," Cirelli says. "Potassiu...

Pulsating ultrasound enhances gene therapy for tumors

...cted into the body. "Basically, we're using sound waves to open up the tissue by producing gaps between the cells, making it leakier and more prone to taking up various genes, agents and compounds," said Victor Frenkel, Ph.D., a staff scientist for the diagnostic radiology department at the NIH Clinical C...

Scientists journey to southern Africa to unravel the secret world of elephant communication

...ck charges do, indeed, generate measurable seismic waves that travel along the surface of the ground. In 19...ere installed in the ground to monitor the seismic waves generated each time the bull vocalized. The results indicated that elephant vibrations are unlikely ...

Butterfly migration could be largest known

...Death Valley, and in the San Fernando Valley. More waves of butterflies are likely to appear in central California over the next few weeks as the insects take wing. Painted lady butterflies, known by the scientific name Vanessa cardui, spend the winter in the desert. As caterpillars turn into adults in th...

A probe, not an echo

...in traditional hand-held ultrasound systems, sound waves are broadcast into the tissue, and the echoes produce an image of the reflecting interfaces ?that is, the sound transmitter and the receiver are both on the same side of the sample. However, only a tiny fraction of the transmitted sound comes back a...

Brain Scan Study of Smokers Reveals Signature of Craving

...aging, in which harmless magnetic fields and radio waves are used to produce images depicting blood flow in brain regions. That blood flow reflects brain activity in those regions. As a group, smokers' brain responses to drug cues remained stable regardless of the duration of time since their last cigaret...

Enzyme's newly discovered role may make it target for arthritis treatment

...tion and secrete chemicals that bring in secondary waves of other immune attack cells. "The contributions of the neutrophil weren't always appreciated by scientists," Pham notes. "When patients come to their doctors with arthritis symptoms, the inflammation typically is so well-established that neutrophil...

Study finds adult stem cells can replicate

...tion and secrete chemicals that bring in secondary waves of other immune attack cells. "The contributions of the neutrophil weren't always appreciated by scientists," Pham notes. "When patients come to their doctors with arthritis symptoms, the inflammation typically is so well-established that neutrophil...

Deep sleep short-circuits brain's grid of connectivity

...area is activated, it responds by sending signals, waves that travel through the axons (nerve fibers) to other regions of the brain. At the same time, we can record how the rest of the brain is responding." The new technique promises science a way to see how the different areas of the brain communicate, T...

Frog peptides block HIV in lab study

...area is activated, it responds by sending signals, waves that travel through the axons (nerve fibers) to other regions of the brain. At the same time, we can record how the rest of the brain is responding." The new technique promises science a way to see how the different areas of the brain communicate, T...

Nose odors and mouth odors: The brain distinguishes

...hnique in which harmless magnetic fields and radio waves detect increased blood flow to brain areas, which reflects increased activity. They used four odorants: chocolate odor represented a food odor, and lavender represented a non-food odor that was similarly pleasant as chocolate. They also chose two od...

Envisat and ERS-2 reveal hidden side of Hurricane Rita

... its cloud structure and pressure. Notably large waves are seen around the eye of Hurricane Rita in the radar image. ASAR measures the backscatter, which is a measure of the roughness of the ocean surface. On a basic level, bright areas of the radar image mean higher backscatter due to surface roughness....

'Underground' tunnels discovered as means for communication between immune system cells

... seconds, dendritic cells and macrophages can send waves of calcium and other small molecules to cells hundreds of micrometers away. Each nanotubule measures between 35 and 200 nanometers across - 5000 times smaller than the width of a human hair - and at any given time, cells may have up to 75 of these ex...

Environmental lessons from tsunami as world's coastal population doubles

...nd coral reefs helped reduce the energy of tsunami waves in Sri Lanka by acting as natural barriers, the Stockholm Environment Institute discovered in a rapid assessment of the environmental impact of the tsunami. In the Caribbean, the Cayman Islands have adapted to major hurricanes. The government took p...

DNA self-assembly used to mass-produce patterned nanostructures

...with molecules that can conduct electrons or light waves to form simple circuits. Based on the characteristics those circuits would have, Dwyer and colleagues have drawn up designs for computer chips. The researchers also may explore how their method of assembling tiles can be used create biological struc...

Genetic defenders protect crops from fungal disease

Like waves of soldiers guarding a castle gate, multiple genetic defenders cooperate to protect plant cells against powdery mildew disease, according to a new study. Powdery mildew is a common fungal infection in plants that attacks more than 9,000 species, incl...

Research: Snails were overlooked contributors to marsh destruction

... trigger formation of grazer fronts and subsequent waves of habitat die-off in an otherwise stable ecosystem," Silliman said. "For marsh ecology, the message is even clearer: The long-standing paradigm that bottom-up forces rule is officially dead." Climate change aside, the study also falls in line with...

3D ultrasound device poised to advance minimally invasive surgery

...of the tube, which in turn send pulses of acoustic waves into the surrounding tissue, Smith explained. The sensors then pick up the returning echoes and relay them back to the scanner where they produce an image of the moving tissue or organ. The scanner uses parallel processing to listen to echoes of each...

1 2 3 4