Tag: "beam" at biology news

New patent will help improve cancer, transplant research

... cytometer, a device that employs a laser beam to examine cells flowing in a stream of water. Chalmers said the new magnetic cell separator could potentially cost less to manufacture than a flow cytometer, and wouldn't ...

Women must develop healthy lifestyles well before menopause to avoid heart disease in later years

...pressure. This is the first study to use electron beam computed tomography (EBCT) to evaluate the relationship between risk factors measured pre-menopausal and the extent of coronary calcium early in menopause, said Dr. Kuller. The study included 535 pre-menopausal women who were randomly assigned to...

Discovery may jump-start mine remediation efforts

...eam used the most finely focused high energy X-ray beam in the world to date to show that small but significant quantities of other toxic ions, arsenic and selenium, for example, as well as zinc are extracted from ground water and concentrated in the biofilms. Another group, led by UW-Madison professor of...

'Translocation' surgery yields unprecedented results

...hotodynamic therapy (PDT). In the first, a laser beam is used to destroy abnormal blood vessels, but few patients maintain enough central vision to permit reading or driving, and the laser could harm surrounding tissue. Photodynamic therapy combines the use of a light-sensitive medication and a las...

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

...l, an ordered stacking of the protein molecules. A beam of X-rays is then directed toward the protein crystal. The X-rays are bent, or diffracted, by features of each protein molecule in a predictable way. Analyzing the resulting X-ray diffraction patterns yields the protein's structure. Because efforts t...

New technology expands 'molecular photography' options

...troduced into the mass spectrometer, where a laser beam blasts successive spots on the tissue to release molecules for analysis. Each spot becomes a "pixel" in the final image, with each "pixel" containing a record of the molecules located in that tiny spot. Computer processing can then be used to displa...

Virus studies reunite two families of major insect-borne viruses

...rn. Diffraction patterns are created when an X-ray beam hits a crystal, causing the electrons surrounding each atom to bend the beam. Computers can then be used to interpret this pattern and reconstruct the positions of the atoms. Enveloped viruses, such as alphaviruses and flaviviruses, are more diffi...

ORNL technology puts power of lab into the field

...nology involves illuminating a sample with a laser beam and measuring the reflected light. The light shows the vibration energies, which are unique to each compound in the sample, and that information helps scientists identify the substance. Its a technology that, until the development of acousto-optic tu...

Researchers find 'north pole' of the molecular world

...o the radial polarization. The team then scans the beam along the molecule in all directions until one of the radial planes lines up with the north or south pole, and the atom absorbs the energy. A slight burst of fluorescence tells the team when theyve hit their mark, and they can determine at exactly wh...

X-ray crystallography at Advanced Photon Source

...e techniques of X-ray crystallography --- firing a beam of X-rays through a crystallized protein sample to...alick describes as "the extra brilliance" of APS's beam lines for studying these large complexes. Brilliance -- which is the intensity of X-rays emitted by...

Using lasers, biologists succeed in getting cells to change course

...inates researchers around the world. Now, using a beam of laser light only a few microns in diameter, Uni...NC School of Medicine. "Then we directed the laser beam into part of the cells to break the bond between the caging group and the amino acid so that the pro...

Analysis of impact studies reveals how bottom fishing affects seafloor denizens

...redging and inter-tidal raking. Otter trawling and beam trawling are less negative, which is not surprisin... mud habitats, not sand. The studies revealed that beam trawling in sand habitats has less impact than the other gear types and other habitats. As expected,...

Experimental microbeam radiation therapy may offer improvement over traditional radiation treatments

...about 1/3 of the tissue, and the areas between the beam slices receive very little radiation. The techniqu...ity synchrotron sources can be used to confine the beam to the extremely narrow slices with very high dose rates that are needed for MRT. In the current stu...

Breast cancer is multi-step, multi-cell type process

...vasive breast cancers. In LCM technology, a laser beam only 7.5 microns in width - roughly one-tenth the size of a human hair -- acts as a "knife"- enabling researchers to isolate cancerous cells from normal cells, and to separate epithelial cells from stromal cells. "Before LCM, the study of cancer gen...

Molecular motor packs DNA into viruses at greater than champagne pressures, researchers report

...n an optical tweezer, which is essentially a laser beam that allows them to pull on the bead at the same time as they measure the resistance. At first they pulled too hard, stalling the motor and probably stripping its gears. Eventually, the researchers were able to measure the force generated by the moto...

Researchers at Vanderbilt's Free-Electron Laser Center are developing new forms of laser surgery, improved X-ray technology, and better methods for protein identification

...nly FEL in the world licensed to use this powerful beam for surgical operations on human patients. The first human surgery using a free-electron laser beam was performed successfully on December 17, 1999. The laser beam was used to destroy part of a brain ...

NIH funds synchrotron beamlines to advance studies of molecular structures

...hree-dimensional shape of a molecule by blasting a beam of X-rays through a crystallized sample of the mol...ientists have compared synchtrotron radiation to a beam of light 30 times more powerful than the sun focused on a spot smaller than the head of a pin. Thes...

New U. of Colorado electron microscopes provide cell images never seen before

...ed at the top of the microscope. "This releases a beam of electrons that penetrate the cell slabs, creating a shadow of the organelles inside," McIntosh said. Lab personnel include McIntosh, the principal investigator, and David Mastronarde, co-director of the facility. Research personnel include Linda ...

Enzyme studies at Brookhaven Lab may lead to new antiviral agents

...am McGrath, a postdoc in the lab, using an intense beam of x-rays available at Brookhaven's National Synchrotron Light Source (NSLS). The pattern of x-rays bouncing off the atoms reveals the three-dimensional molecular structure. In the current studies, Stony Brook University graduate student Mary Lynn Ba...

New view of bacteria-mineral interface to advance bioremediation

...omplex arrangement of prisms to redirect the laser beam at precise angles to reach the locations we need." The size of the sample spots being analyzed can be adjusted depending on the researcher's needs. "The smallest, most precise spot size we've been able to achieve is around 2 micrometers, about the si...

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