Tag: "electron" at biology news
From Corn Rootworms To Art, Cornell's Reactor Is At The Core
...ium) that absorbs them. The metal screen emits an electron
for every neutron it absorbs, and that activates the emulsion and produces the photographic image on film. The result looks like an X-ray, but it can reveal things X-rays cannot. An example: a toy plastic gun sealed in a 1-inch-thick lead box. The...
Researchers Identify A New Cellular Structure: The "Dumposome"
...ught to promote DNAremoval. Smothers conducted the electron
microscopy of dumposomes at Syracuse University. The research was funded by theNational Institutes of Health....
Duke's Russian Laser Making Ultraviolet Light And Gamma Rays
...take advantage of a much more powerful 1.1 billion electron
volt electron"racetrack" at Duke's Free-Electron L...r being reassembled and joined to the laboratory's electron
ring, theOK-4 began producing ultraviolet laser light late on Nov. 13. Within twodays, physicists ha...
Chemists Compute Answers To The Origin Of Gout
...mental data from X-ray absorption spectroscopy and electron
paramagnetic resonance to verify the computational results. The group has now a much better understanding of how and when the molybdenum is involved in the catalysis. One of their conclusions is that the transfer of a hydroxide ion is involved in t...
Oral Vaccine Protects Infants From Severe Rotavirus Diarrhea
...stinal diseases." Dr. Kapikian, newly trained in electron
microscopy, used this technique in 1972to discover Norwalk virus, the first virus associatedwith gastroenteritis. "Since then," he notes, "there have been thousands ofpapers about gastrointestinal viruses." Rotavirus was discovered by Australian s...
Mystery Of Vital Cell Protein Solved After 30 Years
...s Downing. "Obtaining diffraction patterns withan electron
beam enables us to work with crystals only one mol...nstructionderived from a data set that included 93 electron
diffraction patterns and 159images culled by the researchers from the more than 4,000 images which w...
Technique Gives Researchers New Look At Genetic Activity In Living Cells
...ld staining,yet clearer views have been seen under electron
microscopes. Combining this with gene amplification, a process in cancer cells thatduplicates chromosomal regions, has allowed scientists to see entire chromosomearms. The results have provided pictures and proof of theorized chromosomalfibers 10...
Hultgren Receives Prestigious Eli Lilly Award
...th cell biology, protein chemistry,high-resolution electron
microscopy and x-ray crystallography, Hultgren andcolleagues are following three lines of research. First, they are determining the 3-D structure of the adhesin, hoping to find outhow the protein's shape enables it to interact with host receptors. Se...
Insights Into The Proteasome - A Fascinating Macromolecular Machine For Protein Degradation
...This size exclusion mechanism was visualized by electron
microscopy with a gold labeled insulin b -chain caught in transit; the bulky gold label prevents the insulin chain from passing the constriction. The enzymatic mechanism of the proteasome has been a mystery until crystal struct...
Electron Accelerator Provides Unique Proof Of Gene Repair Process In Living Cells
...ut invaluable help of physicists, engineers and an electron
accelerator, UW Medical School molecular biologist...cell without blasting it away," said Petrini. "The electron
accelerator at the Synchrotron, which generates so-called 'ultra-soft' X-rays that are extremely lim...
Structure Of The Plasma Membrane Proton Pump Offers A First Glimpse Of The Mechanism Of Ion Pumping Across Membranes
...e proton ATPase at a resolution of about 0.8 nm by electron
cryomicroscopy of two-dimensional cry...film and used these for structure determination by electron
cryo-microscopy, at a resolution of 0.8 nm. Gene A. Scarborough, from the Department of...
The First Rejection: Eggs Sequester Bits Of Sperm For Later Elimination
...sely at this stubborn section of sperm tail. Using electron
microscopy, they determined that it was composed of what is called the mitochondrial derivative a crystallized form of the sperm's mitochondria. Mitochondria are normally inherited only from the mother, and provide energy for the cells. Because mitoc...
Study Of Sulfides In Bacteria Casts Doubts On Evidence Of Life In Martian Meteorite ALH84001
...fides normally foundwith them. Using transmission electron
microscope observations, the team, which includes ASU Geology andChemistry/Biochemistry faculty members Mihaly Posfai and Peter R. Buseck, Iowa State Universitymicrobiologist Dennis A. Bazylinski, and California Polytechnic physicist Richard B. Frank...
First TableTop Source Of Concentrated X-Rays Built
...lammed back when the fieldreverses direction. The electron
then can give off its energy in the form of anX-ray photon, the particle form of X-ray light. This X-ray light can beamplified by 100-1,000 times by propagating through the hollow fiber at the samespeed as the laser. A major hurdle for earlier attem...
Taking The "Ouch" Out Of Needles: Arrays Of "Microneedles" Offer New Technique For Drug Delivery
...nmicroscope image showing the microneedles, (3) an electron
microscope image ofthe microneedles to which color has been added. WRITER: John Toon...
Fungus Suspect In Frog Deaths
...rine Research, Hobart identified the fungus using electron
microscopy and molecular biology. Berger and Hyatt then demonstrated that it could infect and kill frogs. Strangely, tadpoles do not succumb to this disease. This fits with field reports where tadpoles have been seen in areas after the adults hav...
Seeing Blue-Yellow Color Perception For The First Time
...of the location of the blue-yellow cells by taking electron
micrographs of 320cross-sections of the retina. "We photographed the mosaic of retinal cells pieceby piece, analyzed over 2,000 images, and then used a computer program to buildup a library of the complete structure," explains Sterling, a professor ...
Fatal Frog Fungus Found In The United States
..., when frogs at the National Zoo caught it,he sent electron
microscopy images and tissue samples to mycologist JoyceLongcore at the University of Maine in Orono. "As soon as I saw them, Irecognized the organism," she says. Since then, Nichols has found low levels of the fungus in skin from cricketfrogs in Ill...
'Molecular' Computers? Munich/UD Researchers Report First Glimpse Of Artificial Molecule In Action
.... Specifically, he says, the instrument prompts an electron
moving between twoartificial atoms to interact wit...t pulses,thereby "communicating with the traveling electron
by interfering with it," vander Weide says. The two short-pulse sources are tuned nearly to the same...
Clever Chemistry Protects Beetle Babies
...fication, as shown in MariaEisner's SEM (scanning electron
microscopy) picture of E. borealis pupal hairs on the cover of Science . . The tiny insect pioneered anendeavor in which human chemists, with their costly and sophisticated machines,only now hope to succeed. Combinatorial chemistry has yielded s...
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