Tag: "magnets" at biology news

Moving DNA Molecules With Magnetic Tweezers

... microscope in one dimension. He plans to add more magnets and ajoystick to recreate the three-dimensional movement. A DNA molecule, by itself, is not magnetic. Wirtz overcomes thishurdle with iron oxide beads, each no larger than one-hundredthof a micron in diameter. (A micron is one-thousandth of amillim...

Birds Of A Feather: The Physics Of Flocks

...room temperature, many of theseatoms line up their magnets with those of their neighbors, adding together toc...amount of energy forany two atoms to line up their magnets parallel to each other. Thesecooperative gestures between neighbors quickly lead to a situation in ...

Oregon Scientists Discover A Second Blood-Brain Barrier; Important Finding For Patients With Brain Cancers And Neurological Disorders

...tailed MRimaging." He suggests the use of stronger magnets in MR imaging to provideadequate spatial resolution. The Oregon team has approval to assess thedistribution of these viral-sized iron particles in patients with brain tumorsto determine the feasibility of gene therapy. ...

Magnetic Fluids More Complex Than Previously Thought

...netic field, however, the particles turn into tiny magnets and rapidlyform into long chains. A high magnetic field turns the suspension into asolid." Furst has a gadget - provided by the Lord Corp. of Cary, N.C. - thatdemonstrates this effect in his laboratory. It consists of two plasticplungers, connected b...

Advanced light source reveals secrets of ribosome structure

...derway to add to the ALS three superconductingbend magnets which are capable of generating the higher energy hard x-raysneeded for protein crystallography. The addition of these "superbends" wouldmake it possible to boost the MCF's capabilities to as many as a dozen beamlinesby the year 2002....

New technique identifies M. tuberculosis genes

...he hybrids areremoved from the reaction mixture by magnets and the desired cDNA molecules areamplified by a widely used technique called PCR (polymerase chain reaction). In the case of the Clark-Curtiss laboratory, she and her colleagues wanted tocompare M. tuberculosis cDNA grown in broth culture to that ...

Howard Hughes Medical Institute funds biomedical facilities at Lawrence Berkeley National Lab

... for installation in 2001, will be superconducting magnets thatsteer the path of an accelerated beam of electrons around sharper turns than the conventional bendmagnets now deployed. The tighter curvature of the bends will cause the electrons to emit hard x-raysas opposed to the lower energy "soft x-rays" e...

Weizmann Institute scientists develop a novel system for analyzing genetic data that mimics the human capacity for unsupervised learning

...re highly disorganized. But upon cooling down, the magnets grains progressively organize themselves into well-ordered clusters. Using the statistical mechanics of granular magnets, Domany created an algorithm that can look for clusters in any data. When applied in a cancer study using DNA chips, the new...

New research aims to help rowers take the strain off their backs

... in that it consists of a vertical gap between the magnets allowing functional positioning of subjects in the scanner. This meant the researchers could scan the spines of rowers in simulated rowing positions within the scanner, allowing verification of the current study. Both British Olympic gold-medal winni...

Translating the human genome into protein function: structural genomics research at Columbia

...es beams of electrons and bends them with powerful magnets arranged in a large ring. At each bend of the ring...X-ray radiation." The undulator comprises a set of magnets specially configured to focus the X-rays. "When you set up high-throughput crystallography, you ne...

New x-ray technique images cartilage, may lead to earlier diagnosis of osteoarthritis

...rays are accelerated through a gigantic ring using magnets before they can be tapped for experiments. By placing a crystal in the path of the x-ray beam after it passes through an object, most of the scatter that degrades conventional x-rays is eliminated, resulting in sharper images that highlight the edges...

PNNL celebrates arrival of powerful NMR

...y is a global leader of high-field superconducting magnets and low-temperature cryogenic systems. Over 5,000 Oxford Instruments magnets are advancing NMR research applications worldwide. The company is committed to quality and innovatio...

NIGMS energizes NMR research with world's biggest magnets

... Similarly (but for more complex reasons), bigger magnets enable researchers who use nuclear magnetic resona...ley, Ph.D.) The scientists will use their new NMR magnets to study the structure and behavior of biological molecules. Such studies reveal insights about nor...

Tiny, magnetic spheres may help overcome gene therapy hurdle

...ntaining microspheres injected into a patient with magnets placed outside the skin. Such procedures, could, for example, replace invasive catheterizations used to treat lung and heart diseases, the researchers said. "By packaging the virus with the microsphere, we both guided it to the targeted area and got ...

Kurt Wthrich of The Scripps Research Institute wins 2002 Nobel Prize in Chemistry

...ld. In an NMR magnet, the nuclei act like tiny bar magnets and tend to align themselves preferentially in a particular configuration, while also undergoing spinning motions similar to the gyroscopic precessions of bicycle wheels or spinning tops under an external torque. Any fluctuating magnetic field ortho...

Physics tip sheet #30 - January 9, 2003

...s how a radioactive potassium atom is trapped with magnets and lasers to watch it decay. By carefully analyzing the paths of the decay products, details about the neutrino can be deduced. Journal article: http://link.aps.org/abstract/PRL/v90/e012501...

NIH study shows MRI provides faster, more accurate way to diagnose heart attacks

... the heart." MRI is a type of body scan that uses magnets and computers to provide high-quality images based on varying characteristics of the body's tissues. The technology allows physicians to study the heart's overall structure and functioning continuously in three dimensions. MRI addresses another crit...

New findings could lead to higher resolution functional MRIs

... than oxygenated hemoglobin. Machines use powerful magnets and radio waves to translate the metabolic changes into an image of brain activity. "The initial dip in oxygen occurs in a very localized area," said Jeffrey Thompson, a UC Berkeley graduate student in vision science and lead author of the study. "T...

Highlights of American Chemical Society's national meeting in New Orleans

...ention Center, Room 353-355) Sludge removal using magnets Pollution-eating bacteria that are used to purify wastewater have the unfortunate side effect of producing excess sludge, which can be messy and expensive to remove. Now, researchers at Utsunomia University in Japan have developed an "attractive" n...

Modern blood vessel measurements test belief that magnetic fields can influence blood flow

...n and alchemist, came to the conclusion that since magnets have the power to attract iron, perhaps they can also attract diseases and leach them from the body. Even in the 21st century, the magnetic therapy industry generates approximately $500 million in income, in part, as a result of aggressive marketing...

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