Tag: "rays" at biology news

Physics tip sheet #21 July 10, 2002

...balt-60 sources is laid out in such a way that the rays converge on the target tumor, whose coordinates ar.../pdf/7571-56076.pdf 6) Ultra-high energy cosmic rays and pulsars: a connection A. D. Erlykin, A. A. Mikhailov, A. W. Wolfendale Journal of Physics G: N...

Chemistry of tanning

...formulated with sunscreen have exploded. The sun's rays are more damaging now then ever because the earth'...s how effectively a sunscreen protects against UVB rays that burn skin. Newer sunscreens offer greater protection against sun's rays : Craig Bonda, a chemi...

Natural resistance of pigment cells to sunlight may make deadly skin cancer tough to treat

...stant to treatment. Sunbathers enjoying the summer rays can thank the body's natural sunscreen - a layer of pigmented cells - for preventing much damage to the body. In turn, those dark-colored cells themselves might be destroyed by solar radiation if they didn't contain a protective mechanism that allow...

Brookhaven Lab scientist wins Environmental Mutagen Society Award

...auts resulting from exposure to high-energy cosmic rays in outer space. They are using fish native to Japan, called medaka. Male fish are exposed to energetic nuclei from Brookhavens particle accelerator, the Alternating Gradient Synchrotron, and mated with unexposed females. Mutations in the sperm result...

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

... synchotron radiation, but on the alignment of the rays says Chapman. A prototype he is building of a small DEI machine at IIT uses a regular x-ray tube which has produced high-resolution DEI images comparable to those taken at Argonne. A clinical machine is still years away, but Chapman is confident th...

Alcohol and cancer

... carcinogenic agents such as asbestos, ultraviolet rays of the sun, and cigarette smoking. A study in the March issue of Alcoholism: Clinical & Experimental Research investigates if alcohol exposure can increase the cytotoxicity (cell destructiveness) of known carcinogenic agents that could, in turn, d...

Braille reading strategies may enhance stimulation of the brain responsible for vision

... between active foci (the point at which the light rays meet after passing through a convex lens) in occipital cortex of blind individuals and the multiple visual areas of sighted. Finding evidence of activity circumscribed to anatomically distinct portions of visual cortex in blind individuals might sug...

University of Rhode Island fisheries oceanographers study the effects of predator-prey interactions in the Georges Bank fish community

...nt predators, but have been replaced by sharks and rays as the dominant fish eaters in more recent years. ...d levels of abundance. Predation by sharks and rays does not appear to be a significant source of mortality for cod and haddock. Most of the predation o...

Skin expert issues winter sports warning

...s - but he says that even in cloudy weather the UV rays in sunlight penetrate through to the slopes. Snow ...he UV rays. In general the air filters 4% less UV rays for every 1,000 feet above sea level - meaning that at an altitude of 5,000 feet - and most ski reso...

Dupont donates patents to UCSD

...e used in experiments on panels that harness solar rays to produce energy, clean up waste water, or mitigate air pollution. Dalen Keys, chief technology officer of DuPont Displays, and technology director of DuPont iTechnologies stated: Information and communication are key thrusts for DuPont. We believe ...

Scientists uncover the exact mode of action of five antibiotic drugs

... with high intensity X-ray beams, analyzed how the rays diffract, and then worked backward to decipher the crystals exact structure a technology known as X-ray crystallography. Using this method, the researchers were able, for the first time, to view how the antibiotic drugs bind to a specific site of a...

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

... heat. The upper end proceeds from the ultraviolet rays that cause sunburn, through X-rays, up to gamma rays with wavelengths less than the diameter of an atom and energies three trillion times greater than ty...

Brittlestars use crystal lenses to spot approaching predators unique visual system is the first of its kind to be discovered in animals inhabiting the earth today

...uide and focus light and transmit the concentrated rays inside the tissues, to the nervous system? These questions remained unanswered for almost 10 years until recently, when the scientists found a way to examine them experimentally in a controlled manner. The experiment was conducted at Bell Laboratori...

Excessive fishing prompted coastal ecosystems to collapse, but wise management now will help

..., crocodiles, codfish, jewfish, swordfish, sharks, rays and other species are now functionally or entirely extinct in most coastal environments. As a result, "fantastic" coasts around the world have changed radically -- and for the worse, scientists say. Evidence of what humans have lost and what might be...

Microbes and the dust they ride in on pose potential health risks

...crobes die because of exposure to ultraviolet (UV) rays of the Sun," said Griffin. "However, microbes in the cracks and crevasses of dust particles may be shielded from UV. We also believe that the upper altitudes of the dust clouds deflect harmful UV rays, shielding microbes at lower altitudes as they ar...

Gulp! URI professor studies how sharks eat

...e about 800 species of sharks worldwide, including rays and skates that are close relatives and believed to have evolved from the shark. Rhode Island has its share of sharks -- offshore waters host Blue, Sandtiger, Hammerhead and Thresher sharks while the Spiny Dogfish, Smooth Dogfish, Dusky and Sandbar S...

Neuroscientist studies brains of bizarre-looking mammals

...directly from the body, the moles distinctive nose rays form as fleshy cylinders on the side of the animal... in detail at the neural connections of individual rays of the star, Catania has also found a striking functional parallel between the wiring of the nose st...

Digging for genetic fossils: Hutchinson Center researchers solve structure of ancient biological molecule

...ar crystals, which forms a distinct pattern as the rays are diffracted. Computer programs translate the diffraction pattern to reveal the molecule's three-dimensional properties. In some cases, scientists can determine the resolution of three-dimensional molecular structure to within a millionth of an inc...

Chemistry of life in outer space is topic of two-day symposium, April 4-5

...iscuss the effects of ultraviolet light and cosmic rays on ices found between the stars in space. He also will discuss the formation of quinones, compounds essential to life on Earth, in outer space. (The paper on this research, GEOC 144, will be presented at 1:35 p.m., Wednesday, April 4, in the U.S. Gra...

Global warming: lessons taught by snails and crabs

...l creatures that frequently are exposed to the hot rays of the sun during low tide? To find out, Somero, postdoctoral scholar Lars Tomanek and former graduate student Jonathan Stillman (now at Occidental College) decided to investigate thermal tolerance limits in two groups of common Pacific invertebrates...

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