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A Smarter Way to Make Ultraviolet Light Beams

By Guest PostNovember 30, 2011Scienceharmonic distortions, information storage, infrared signal, jeremy moore, lasers, matthew tomes, microscopy, mona jarrahi, optical resonator, optics express, original wavelength, tal carmon, ultraviolet light, university of michigan, wavelength tunable ultraviolet sources

ANN ARBOR, Mich.— Existing coherent ultraviolet light sources are power hungry, bulky and expensive. University of Michigan researchers have found a better way to build compact ultraviolet sources with low power consumption that could improve information storage, microscopy and chemical analysis.

A paper on the research is newly published in Optics Express. The research was led by Mona Jarrahi and Tal Carmon, assistant professors in the Department of Electrical Engineering and Computer Science. The experiment was performed by Jeremy Moore and Matthew Tomes, both graduate students in the same department. (more…)

A Green Ring Fit for a Superhero

By Guest PostJune 19, 2011Scienceastronomers, citizen scientist, constellation scorpius, diminutive guardians, emerald nebula, galactic plane, Galaxy, green ring of dust, infrared colors, infrared detectors, NASA, o stars, planet oa, public astronomy projects, rcw 120, spitzer, spitzer space telescope, superhero green lantern, the milky way project, ultraviolet light, zooniverse

This glowing emerald nebula seen by NASA’s Spitzer Space Telescope is reminiscent of the glowing ring wielded by the superhero Green Lantern. In the comic books, the diminutive Guardians of the Planet “Oa” forged his power ring, but astronomers believe rings like this are actually sculpted by the powerful light of giant “O” stars. O stars are the most massive type of star known to exist.

Named RCW 120 by astronomers, this region of hot gas and glowing dust can be found in the murky clouds encircled by the tail of the constellation Scorpius. The green ring of dust is actually glowing in infrared colors that our eyes cannot see, but show up brightly when viewed by Spitzer’s infrared detectors. At the center of this ring are a couple of giant stars whose intense ultraviolet light carved out the bubble, though they blend in with the other stars when viewed in infrared. (more…)

Stem Cell Transplants in Mice Produce Lifelong Enhancement of Muscle Mass

By Guest PostNovember 13, 20102 commentsScienceaging, bradley olwin, cell transplant, chronic, degenerative muscle diseases, green fluorescent protein, leg muscles, mice, muscle function, muscle stem cells, myofibers, satellite cells, stem cells, transplant, ultraviolet light, university of colorado at boulder

A University of Colorado at Boulder-led study shows that specific types of stem cells transplanted into the leg muscles of mice prevented the loss of muscle function and mass that normally occurs with aging, a finding with potential uses in treating humans with chronic, degenerative muscle diseases.

The experiments showed that when young host mice with limb muscle injuries were injected with muscle stem cells from young donor mice, the cells not only repaired the injury within days, they caused the treated muscle to double in mass and sustain itself through the lifetime of the transplanted mice. “This was a very exciting and unexpected result,” said Professor Bradley Olwin of CU-Boulder’s molecular, cellular and developmental biology department, the study’s corresponding author. (more…)

Berkeley Study Shows Ozone and Nicotine a Bad Combination for Asthma

By Guest PostAugust 17, 2010Health, Scienceasthma, asthma hazard, berkeley lab, chen-lin liu, Health, hugo destaillats, indoor environments, jared smith, kevin wilson, lara gundel, mohamad sleiman, musahid ahmed, ozone, roy kaltschmidt, secondhand tobacco, smoke, thirdhand smoke, tobacco-related disease, ultraviolet light, vuv light

Another reason for including asthma on the list of potential health risks posed by secondhand tobacco smoke, especially for non-smokers, has been uncovered. Furthermore, the practice of using ozone to remove the smell of tobacco smoke from indoor environments, including hotel rooms and the interiors of vehicles, is probably a bad idea.

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Tag Archives: ultraviolet light

A Smarter Way to Make Ultraviolet Light Beams

A Green Ring Fit for a Superhero

Stem Cell Transplants in Mice Produce Lifelong Enhancement of Muscle Mass

Berkeley Study Shows Ozone and Nicotine a Bad Combination for Asthma