The cookie is used to store the user consent for the cookies in the category "Analytics". This cookie is set by GDPR Cookie Consent plugin. These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. A mathematician from computer science and an environmental physicist. The study will be prepared and signed by 4 scientists at least 2 from the team LAZER of the University of Crete. The following diagrams show low frequency sources EMF : UVA / UVB / UVC This means that each time the eyes are exposed to UV rays without protection, new lesions are added to the previous ones.įor the Low frequencies, measurements of your space are estimated in pointsįor further knowledge about UV exposure for the Sun for the best information and sensitivity of the Hotel for its clientele.Ģ) Prepare a study that includes at least the following:Ī) Capture of the measurements per point so that you are fully aware of the hourly exposure to UVA UVB UVC radiationī) An additional map (excluding absolute values) will be provided with a color code identifying areas that exceed the permissible limits, as shown by National and European health recommendations for office space or storage areas for sensitive material.ģ) The study should include proposals with tables of exceedances, at the points to be identified. Long-term damage, on the other hand, does not occur overnight, but accumulates over time acting cumulatively. a sensitive man burn in the cornea, which he will probably notice at night, after returning home and going to bed at night, when he wakes up with severe eye pain. With this focus, part of the UV radiation reaches the back of the eye, where it can also cause damage.Īcute exposure results in burns to the eyelids, photokeratitis (inflammation of the cornea, and photoconjunctivitis - inflammation of the cornea).Ĭhronic UV exposure can cause flaps (the appearance of a cancerous growth starting in the inner corner of the eye), cataracts, macular degeneration, and even cancer of the skin around the eyes, eyelids or inside eye.įor injuries from acute exposure even a noon on the beach without sunglasses and a hat is enough to suffer e.g. The lens is the structure of the eye that focuses light to reach specific locations in the retina - the lining at the back of the eye that contains the stimulus receptor cells. This is especially true for the lens, which after years of UV absorption acquires a yellowish color and blurs (this is the waterfall ). Inside the eye, the lens and cornea filter UV radiation, but over time this infiltration causes damage to the eyes. Ultraviolet radiation reaches your eyes mainly through reflection on surfaces such as asphalt, sand, water, glass and snow (skiers who are temporarily "blinded" (for 24-48 hours) if left without their glasses in the snow, they actually get photokeratitis, an inflammation of the superficial cornea of the eye that is proportional to the skin burn). In general, the shorter the wavelength, the greater the risks of exposure to UV radiation. Some people experience photosensitivity reactions to exposure to UV radiation (photosensitivity) due to genetic-metabolic peculiarities or drug use. The ability of the human body to protect and repair the damage caused by ultraviolet radiation decreases during our lifetime. Other mechanisms cleave the site where the dimers are formed and DNA polymerase fills in the missing bases. Organisms have developed several different mechanisms to repair thymine dimers, such as the enzyme photolase that is activated by blue radiation and separates dimers. The shape of the DNA changes locally at the point where the dimers are formed, causing the polymerases of both DNA and RNA to pass through them, thus changing the reading frame, resulting in mutations. When ultraviolet radiation interacts with DNA it causes a rearrangement where there are two contiguous thymine bases creating thymine dimers. This is why the ozone hole is a serious ecological problem. It is dangerous radiation and the ozone layer protects the earth's surface from it. It reaches the earth through its re-emission from the stratosphere. The main source of ultraviolet radiation is the sun UVC (290 - 200 nm) is extremely harmful to the skin, but is completely absorbed by stratospheric ozone and does not reach the earth's surface. It is the most dangerous type of ultraviolet radiation, as it has been used in laboratory mutations. UV-C: This radiation in the vacuum ranges between 40 nm and 280 nm.
0 Comments
Leave a Reply. |