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Tag: "magnetic" at biology news

Unraveling the mysteries of poison

...d other German and French colleagues have combined magnetic resonance spectroscopy (solid-state NMR) with special protein synthesis procedures to uncover how potassium channels and toxins combine and change in structure. This work could make it possible to develop medications for high blood pressure and many ...

Oops! Researchers publish new findings on the brain's response to costly mistakes

...esponse even more precisely. The fMRI scanner uses magnetic fields to create images based on blood flow, and can detect tiny changes in the rate of blood flow in and out of various areas of the brain. The more blood flowing to a specific area, the more active the cells in that area are ?and therefore, the mor...

U of MN researchers develop way to visualize synchronized interactions of nerve cells in the brain

.... Current methods of evaluation such as functional magnetic resonance imaging (fMRI) are too slow--they take s...ord, with 1- millisecond temporal resolution, tiny magnetic fields from the brain during a short period of time. They studied this interaction in research subj...

Wrinkled membranes create novel drug-delivery system

...scovered nanoparticles that can be chilled through magnetic cooling. Chaieb and colleagues at Illinois are ex...capsules with the nanoparticles. When exposed to a magnetic field, the nanoparticles would cool down and remove heat from the capsules. The capsules would then ...

Watching the brain switch off 'self'

...rs scanned the volunteers' brains using functional magnetic resonance imaging. In this widely used technique, harmless magnetic fields and radio waves are used to scan blood flow in brain regions, which indicates activity. The ...

Botox could help target resistant tumors for treatment

...x in both types of tumors. In tests on perfusion, magnetic resonance imaging results (MRI) showed significantly greater perfusion in treated mice after three days. In addition, Botox "pre-treatment" led to significantly greater delays in tumor growth as well as stimulation of apoptosis (programmed cellular...

How 'hot' emotional brain interferes with 'cool' processing

...s those involved in memory tasks. Their functional magnetic resonance imaging (fMRI) images of human volunteer...This widely used technique involves using harmless magnetic fields and radio waves to scan the brain to detect levels of blood flow, which indicates increased o...

Aggression-related gene weakens brain's impulse control circuits

...l Weinberger, M.D., and colleagues report on their magnetic resonance imaging (MRI) study online in the Proceedings of the National Academy of Sciences during the week of March 20, 2006. "These new findings illustrate the breathtaking power of 'imaging genomics' to study the brain's workings in a way that ...

Nano machine switches between biological and silicon worlds

...ll-Effect sensors. The Hall Effect describes how a magnetic field influences an electric current. That influen... anchoring the floating end of the DNA strand to a magnetic bead, itself held up under the influence of magnetism. A specific type of protein, called a Restric...

Predicting success

...ation Department, has come up with a non-invasive, magnetic resonance imaging- (MRI-) based method for predicting possible problems. The findings of their studies on animals, which appeared in the journal Cancer Research, may, in the future, influence treatment regimes for millions of cancer patients. Intr...

Great (taste) expectations: Study shows brain anticipates taste, shifts gears

...e, sugar water or distilled water while undergoing magnetic resonance imaging (MRI). The subjects, Nitschke explains, were asked beforehand to associate a prescribed set of cues with a taste. A "minus sign" flashed through fiber optic goggles to subjects undergoing MRI, for instance, was to be an anticipator...

Cortex matures faster in youth with highest IQ

...ences are consistent with findings from functional magnetic resonance imaging, showing that levels of activation in prefrontal areas correlates with IQ, note the researchers. They suggest that the prolonged thickening of prefrontal cortex in children with superior IQs might reflect an "extended critical perio...

Carnegie Mellon develops non-invasive technique to detect transplant rejection at cellular level

...lleagues have developed a promising tool that uses magnetic resonance imaging (MRI) to track immune cells as t...n oxide particles, which are very sensitive to the magnetic fields used during MRI. Wu injected the MPIO or USPIO particles into rats that had received heart tr...

Cellular scale drug delivery from the inside out

...de nanoparticle caps which can be manipulated by a magnetic field. In a simple demonstration of the principle,...ular point, such as a tumor site, and then use the magnetic field to remove the caps and release the drug," Lin said. "The advantage of using a magnetic trigger...

Interactive 3-D atlas of mouse brain now available on web

...y. The database was created using high-resolution magnetic resonance (MR) microscopy at the University of Florida in collaboration with researchers from Brookhaven Lab's Center for Translational Neuroimaging. The work was done in parallel with an international collaboration, the Mouse Phenome Database (MPD) ...

Alleged 40,000-year-old human footprints in Mexico much, much older than thought

... magnetized in a direction parallel to the Earth's magnetic field at the time of cooling. Because the Earth's ... history, it is possible to date rock based on its magnetic polarity. Feinberg found that the rock grains in the volcanic ash had polarity opposite to the Eart...

UCLA imaging study of children with autism finds broken mirror neuron system

...Brain Mapping Center, the research used functional magnetic resonance imaging (fMRI) to measure brain activity in 10 high-functioning children with autism while they imitated and observed 80 photos depicting different emotions such as anger, fear, happiness or sadness. In addition, the brain activity of 10 ty...

Superconducting magnet attracts molecular research

... Weighing in at roughly seven and a half tons, the magnetic resonance (MR) spectrometer was funded by a $2 mil...the superconducting electric coils that create the magnetic field were bathed in liquid helium to drop the temperature to 2 degrees Kelvin or minus 456 degrees ...

New technique puts brain-imaging research on its head

...cale and captured the movement inside the brain by magnetic resonance imaging (MRI). Philip Bayly, Ph.D., Lilyan and E. Lisle Hughes Professor in Engineering, Guy Genin, Ph.D., assistant professor of mechanical engineering, and Eric Leuthardt, MD, a Washington University neurosurgeon, tested seven subjects i...

Making medicine 'smarter'

... is urgently needed. Meyer-Baese hopes to utilize magnetic resonance imaging (MRI) -- which holds promise in better detection of hard-to-find cases of breast cancer -- to provide doctors with the more critical eyes of a computer. Despite the incredible potential of MRI technology, which cranks out at least 2...

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