16.08.2015
Current equipment to produce vacuum-ultraviolet radiation is large and prohibitively expensive. Researchers created this device by growing a luminescent "phosphor" from a thin sheet of an inexpensive material containing potassium, magnesium, and fluorine.
This new method of designing lights could deliver a new generation of the ultraviolet lights that are small, durable and environmentally friendly. Graphene mass production now possible, says Irish scientists: What does this mean for the technology industry? Carbon Nanotube Outperforms Silicon: Will Microprocessors Ditch Silicon Transistors Over Carbon Nanotube Transistors? Left panel: Although 207-nm UV light can penetrate and kill bacteria such as MRSA, it is unable to penetrate to the nucleus of human cells. Despite major efforts to keep operating rooms sterile, surgical wound infections remain a serious and stubborn problem, killing up to 8,200 patients a year in the U.S.
Scientists have known for many years that UV light from a standard germicidal lamp (which emits a broad spectrum of wavelengths, from about 200 to 400 nanometers [nm]) is highly effective at killing bacteria; such lamps are routinely used to decontaminate surgical equipment. The researchers found that 207-nm UV light was as effective at killing MRSA bacteria as a conventional UV lamp. In another experiment, the researchers tested the two UV lamps on a standard tissue-culture model of human skin (which includes the major skin layers, the epidermis and dermis).
The paper is titled, "207-nm UV Light—A Promising Tool for Safe Low-Cost Reduction of Surgical Site Infections.


Johbu Itoh at the Tokai University School of Medicine in Japan has developed a new and highly effective cancer therapy method where cancer cells are irradiated with ultraviolet C (UVC) light.
As they destroy bacteria very efficiently, plasmas constitute an alternative to chemical disinfectants and potentially to antibiotics, as well. Human skin must cope with UV radiation from the sun and other harmful environmental factors that fluctuate in a circadian manner. An international team led by researchers from the University of Pittsburgh School of Medicine found that targeting certain donor cells lowered the risk of organ rejection in mice that underwent kidney and heart transplants. When surgical residents need to practice a complicated procedure to fashion a new ear for children without one, they typically get a bar of soap, carrot or an apple.
Lack of success on the fairway may not be due to your swing – it could be your hips that are to blame. Prevent Slip and Fall AccidentsPreventing slips and falls should be a top priority for any business operator, property manager, or owner. A new method of producing a type of these devices could make the machines smaller, less expensive and more environmentally friendly. At these energies, the photons of light can pass through a vacuum, but are quickly converted into other forms by oxygen. Researchers looking for an environmentally friendly way of producing these devices had to find a method to introduce the substance. A study by Columbia University Medical Center (CUMC) researchers suggests that narrow-spectrum ultraviolet (UV) light could dramatically reduce such infections without damaging human tissue.


Brenner and his team hypothesized that a very narrow spectrum of UV light—around 207 nm—might be capable of destroying bacteria while leaving human tissue unaffected. However, the 207-nm light resulted in 1,000-fold less killing of human skin cells than did the standard UV light. Exposure to a standard UV lamp caused extensive precancerous changes in the epidermis, while exposure to the same level of 207-nm light did not.
An injury to a worker or customer caused by a slip and fall accident can be extremely costly due to loss business or being held legally liable.
It’s potent enough for commercial and industrial use yet 100% green, organic, and safe to use. Right panel: Unlike UV from conventional lamps, 207-nm UV light is unable to penetrate the surface layer of dead skin to reach sensitive cells in the epidermis. Patients with surgical wound infections, compared with those without such infections, are 60 percent more likely to spend time in an ICU, are five times as likely to be readmitted to the hospital, have twice the mortality rate, have longer hospital stays, and have roughly double the total health-care costs.
Because UV light at this wavelength is strongly absorbed by proteins, it is expected to be safe for two reasons: At the cellular level, it cannot reach the nucleus of human cells, and at the tissue level it cannot reach the sensitive cells in the skin epidermis and the eye lens.



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