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Tag: "magnetic" at biology news

A new study of living cells could revolutionize the way we test drugs

... modified apparatus used originally to detect weak magnetic fields in superconductors*. Unfortunately, these modifications reduced the sensitivity of the technique, and the normal activity of the yeast cell could not be detected. This is the first time such a technique has been used on a living cell. Not t...

Reading hidden intentions in the human brain

...y, the researchers in the new work used functional magnetic resonance imaging (fMRI) to assess brain activity while subjects concentrated on their choice of intended mental action, but prior to execution of the action. Specifically, subjects were free to choose between adding or subtracting two numbers and we...

Homing pigeons get their bearings from their beaks

... that birds possess the ability to use the Earth’s magnetic field for their navigation, although just how this...on designed to analyze the three components of the magnetic field vector separately. They react to the Earth’s external magnetic field in a very sensitive and ...

Tracing broken wiring in stroke patients

..." Their findings also demonstrate the value of the magnetic resonance imaging (MRI) technique for studying how...tical technique, in which harmless radio waves and magnetic fields are used to map oxygen levels in brain regions. By performing FC MRI in patients with spatial...

Study to explore using magnets to correct 'sunken chest'

...udies have demonstrated that long-term exposure to magnetic fields is not harmful. Sunken chest had long been considered a cosmetic defect. But recent studies have determined that while not life-threatening, in severe cases the deformity can cause heart and breathing difficulties, because the abnormal brea...

Procedure predicts embryos most likely to result in pregnancy

... "We found that proton NMR, a non-invasive nuclear magnetic resonance form of spectroscopy, will determine the metabolic profile of the embryo and accurately predict its reproductive potential," said Seli, who plans to confirm the findings in a larger trial. ...

Scientists create dual-modality microbeads to improve identification of disease biomarkers

... to simultaneously or sequentially add optical and magnetic nanoparticles into the beads. Adding magnetic nanoparticles allows the use of a magnetic field to attract and easily remove the beads from a liqui...

Studies yield insight into the numerical brain

...the subjects' brains were scanned using functional magnetic resonance imaging (fMRI), in which harmless magnetic fields and radio waves are used to measure blood flow in brain regions, which reflects activity. T...

The connector rotation hypothesis? Phage do not pack their DNA by rotation

... packaged in the opposite direction by attaching a magnetic bead to its loose end and applying a magnetic field. Importantly, they also labeled the connector complex with fluorescent dye molecules so they c...

Neural bottleneck found that thwarts multi-tasking

...ual-task limitation required the use of functional magnetic resonance imaging, or fMRI, an imaging technology that reveals the brain areas active in a given mental task by registering changes in oxygenated blood concentration in these regions. While fMRI is an excellent tool for identifying a particular area ...

Do you hear what i see?

...ate in the study. Kayser’s team used functional magnetic resonance imaging to draw a map of 11 small, tightly packed fields in the monkeys?auditory cortex that differ by the frequency of sound they process. Scans recorded activity in the monkeys?brains while they watched a video, with and without sound, an...

Boosting brain power -- with chocolate

...c physiology at The University of Nottingham, used magnetic resonance imaging (MRI) to detect increased activity in specific areas of the brain in individuals who had consumed a single drink of flavanol-rich cocoa. The effect is linked to dilation of cerebral blood vessels, allowing more blood ?and therefore ...

Biologically inspired sensors can augment sonar, vision system in submarines

...thography and planar deposition. A small amount of magnetic material is electroplated onto each of the parts, ...hen freed from the substrate by an etchant. When a magnetic field is applied, the induced torque causes the pieces to rotate out of the plane on tiny hinges and...

Novel computed imaging technique uses blurry images to enhance view

...icroscopy, ISAM can do for optical microscopy what magnetic resonance imaging did for nuclear magnetic resonance, and what computed tomography did for X-ray imaging, the scientists say. "ISAM can perfo...

Widely used iron nanoparticles exhibit toxic effects on neuronal cells

...ssible way to manipulate nerve cells remotely with magnetic force. Eventually they had hoped to conduct in viv...periments, PC12 cells that had not been exposed to magnetic nanoparticles generated three neurites in response to nerve growth factor. However, exposure to a lo...

UCLA: How does your brain respond when you think about gambling or taking risks?

...ing the possible wagers, they were in a functional magnetic resonance imaging (fMRI) scanner at UCLA's Ahmanso...s studied their brain activity; the technique uses magnetic fields to spot active brain areas by telltale increases in blood oxygen. For each question, the p...

Dig deeper to find Martian life

...s. Unlike Earth, Mars is not protected by a global magnetic field or thick atmosphere and for billions of years it has been laid bare to radiation from space. The team quantified how solar and galactic radiation is modified as it goes through the thin Martian atmosphere to the surface and underground. Thre...

One-of-a-kind imaging probe reveals secrets useful for drug discovery

...s eyelash. But using a refined version of nuclear magnetic resonance technology, or NMR, scientists have unlo... to defend itself from predators. Similar to the magnetic resonance imagers used to examine patients in hospitals, this analytical tool uses much stronger mag...

Lungs try to repair damaged elastic fibers

...ed from emphysema. The team used hyperpolarized magnetic resonance imaging (MRI) to characterize the regions of the lung showing moderate emphysema and regions showing severe emphysema. They found that new elastin synthesis was initiated in moderately diseased specimens. The researchers did a second stu...

New way of tracking muscle damage from radiation

...n therapy; and a technique called dynamic enhanced magnetic resonance imaging (DEMRI) to study what happens to the blood supply at a microscopic level. "These techniques are powerful, non-surgical ways to look into the body and study the microscopic and biochemical changes that are occurring in each patie...

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