7/1/2023 0 Comments Uv black light![]() ![]() Sometimes the cells with DNA mutated by the sun's rays turn into problem cells that don't die but keep proliferating as cancers. Usually within half a day of overindulging in the sun, the characteristic red-lobster look of a sunburn begins to make itself known, and felt. The body senses this destruction and floods the area with blood to help with the healing process. ![]() UV rays can damage the DNA in the body's cells. When this happens, a toxic reaction occurs, resulting in sunburn. ![]() However, continued exposure to UV radiation can overwhelm the body's defenses. "Melanin is a natural sunscreen," Gary Chuang, an assistant professor of dermatology at Tufts University School of Medicine, told Live Science in a 2013 interview. When the body senses sun damage, it sends melanin into surrounding cells and tries to protect them from sustaining more damage. Melanin absorbs UV light and dissipates it as heat. This consists of a pigment called melanin, which is produced by cells in the skin called melanocytes. Essentially, a suntan results from the body's natural defense mechanism kicking in. Still, "broad-spectrum ultraviolet radiation is the strongest and most damaging to living things," according to the NTP's "13th Report on Carcinogens." SunburnĪ suntan is a reaction to exposure to harmful UVB rays. No measurable UVC from solar radiation reaches the Earth's surface, because ozone, molecular oxygen and water vapor in the upper atmosphere completely absorb the shortest UV wavelengths. Of the solar UV energy that reaches the equator, 95 percent is UVA and 5 percent is UVB. However, only about 10 percent of sunlight is UV, and only about one-third of this penetrates the atmosphere to reach the ground, according to the National Toxicology Program (NTP). For instance, many healthcare and food service locations now use imaging technologies to make the invisible visible, helping to eliminate many of the steps discussed here.Most of the natural UV light people encounter comes from the sun. In most cases, bacteria and other contaminants will illuminate under the UV light, according to Evans.īecause using UV lights is a fairly involved process, managers and cleaning professionals should know they have other options when concerns mount about hidden pathogens on surfaces. If testing an entire room, start in one corner and move around the room from there, hovering over surfaces suspected of being contaminated. The test areas need to be as dark as possible for the UV light to expose bacteria.Ħ. Put on UV-protecting glasses or goggles.ĥ. If checking surfaces on furniture or appliances, move them so that those areas are easily accessible before UV testing begins.Ĥ. ![]() "However, do not sanitize or disinfect the test area, that can skew the results," said Evans.ģ. In some cases, this may include cleaning the area first with an all-purpose cleaner. Select a professional-grade UV light system that emits UV rays in extended frequencies - 100 to 400 nanometers (400 nanometers are the equivalent of about 1.6 inches) - to detect bacteria on surfaces.Ģ. However, while many facility managers and cleaning professionals are familiar with UV lights, they often do not know how to use one.Īccording to Brad Evans with OptiSolve, some of the key steps to using a UV system include the following:ġ. Typically, UV lights are used to test surfaces especially when there is a disease outbreak or any sudden increase in occurrences of a specific disease at a particular time or place. The lights cause materials such as bacteria, urine, seminal fluids and blood, to "fluoresce," so that the naked eye can detect them. Black lights, also known as ultraviolet lights (UV), are often used in professional cleaning to help detect if hidden pathogens are present on walls, high-touch areas, ledges, furniture, and scores of other surfaces. ![]()
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