Aerosol microdroplets, the tiny particles that linger in the air longest after we talk, cough, or sneeze, do not appear to be extremely efficient at spreading the virus that leads to COVID-19.
Oct 27, 2020
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Neuroscientists at UCL have used laser beams to "switch on" neurons in mice, providing new insight into the hidden workings of memory and showing how memories underpin the brain's inner GPS system.
Nov 6, 2020
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A new, noninvasive method for measuring brain blood flow with light has been developed by biomedical engineers and neurologists at the University of California, Davis, and used to detect brain activation. The new method, ...
May 13, 2021
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Shortly after the Hubble Space Telescope went into orbit in 1990 it was discovered that the craft had blurred vision. Fortunately, Space Shuttle astronauts were able to remedy the problem a few years later with supplemental ...
Aug 23, 2012
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The brain is perhaps the most sensitive organ with respect to changes in blood flow and oxygen supply. Even brief interruptions in capillary flow (or "stalling") can indicate acute neurological issues; evidence suggests that ...
Sep 13, 2023
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(HealthDay)—Lasers in toys can be dangerous to children and those around them, posing the risk of serious eye injuries and even blindness, according to the U.S. Food and Drug Administration.
Aug 9, 2013
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Diagnosing coronavirus takes approximately one hour using current methods. A new technology, based on a combination of optics and magnetic particles, can rapidly test 100 samples of patients potentially infected with the ...
Feb 14, 2020
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Pioneering techniques aiming to recreate human bone for replacement and repair will be showcased at the Royal Society's annual Summer Science Exhibition which opens to the public today.
Jul 3, 2013
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A team of New York University scientists has developed a method using holographic imaging to detect both viruses and antibodies. The breakthrough has the potential to aid in medical diagnoses and, specifically, those related ...
Oct 13, 2020
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University of Oregon scientists collaborating with an Oregon company that synthesizes antisense Morpholinos for genetic research have developed a UV light-activated on-off switch for the vital gene-blocking molecule. Based ...
Apr 4, 2012
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A laser is a device that emits light (electromagnetic radiation) through a process called stimulated emission. The term laser is an acronym for light amplification by stimulated emission of radiation. Laser light is usually spatially coherent, which means that the light either is emitted in a narrow, low-divergence beam, or can be converted into one with the help of optical components such as lenses. Typically, lasers are thought of as emitting light with a narrow wavelength spectrum ("monochromatic" light). This is not true of all lasers, however: some emit light with a broad spectrum, while others emit light at multiple distinct wavelengths simultaneously. The coherence of typical laser emission is distinctive. Most other light sources emit incoherent light, which has a phase that varies randomly with time and position.
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