Ultraviolet radiation, also known as UV rays, is energy that comes from the sun. It falls under invisible light on the electromagnetic light spectrum. It is more towards the violet side; hence, why it is named ultraviolet light. UV rays have higher energy and shorter wavelengths. According to live science, “it has frequencies of about 8 × 1014 to 3 × 1016 cycles per second, or hertz (Hz), and wavelengths of about 380 nanometers (1.5 × 10−5 inches) to about 10 nm (4 × 10−7 inches)” (Lucas). Our eyes are not able to see UV rays, because our eye receptors have not evolved to see it. The UV radiation category can be observed on figure 1 of the electromagnetic spectrum. Figure 1 UV radiation was discovered by Johann Wilhelm Ritter in …show more content…
The most referred to and common usage of Ultraviolet is the UV rays coming from the sun causing skin cancer. We use sunscreen to protect ourselves. Getting a sunburn is a very painful experience, whether severe or a slight sunburn most people have experienced the sensation. Gary Chuang, a well versed dermatologist explains the process of sunburn stating “continued exposure to UV radiation can overwhelm the body's defenses. When this happens, a toxic reaction occurs, resulting in sunburn. UV rays can damage the DNA in the body's cells. The body senses this destruction and floods the area with blood to help with the healing process” (Lucas). This is also when the body becomes inflamed and skin cancer can start forming. The more someone gets burned the higher they are at risk for skin cancer. The DNA is trying to repair the skin damage, but sometimes the process fails and causes skin cancer. Melanoma is the most deadly form of skin cancer. Every five times a person is burnt, their chances of skin cancer doubles (Lucas). One interesting form of skin cancer treatment is the actual use of ultraviolet light. How can ultraviolet radiation be used to help skin cancer? Is that not the thing that caused it in the first place? Lucas writes “it may seem counterintuitive, but psoralen ultraviolet light treatment, PUVA, can be useful due to UV light’s effect on the production of skin cells. It slows down the growth that plays a major role …show more content…
As Xenex, a UV sterilization company writes, “high intensity ultraviolet light is produced by our xenon flash lamps across the entire disinfecting spectrum known as UV-C. This UV-C energy passes through the cell walls of bacteria, viruses and bacterial spores” (How UV). The UV robots are killing the bad infections throughout the hospital. As discussed earlier, the UVC radiation is much higher energy than the UVB and UVA radiation. Other than extreme ultraviolet radiation, UV robots use the highest spectrum of ultra violet energy. A hospital may cut down on cost of janitorial work, employees will not take as much sick leave, and patients will have a cleaner hospital with the long term investment of UV robot. The problem with UV sterilization is that there is no way of measuring it. Therefore, the success cannot be measured. The UV robots work, but there is no way to tell if it killed every bacteria or pathogen. Despite this, UV robots have been proven to be an effective ways to clean hospitals. Figure 4 shows a picture of a UV robot in a
Skin cancer is a significant public health issue in Australia. Exposure to ultraviolet radiation emitted by the sun in the UVA and UVB wavelengths is the primary cause. Australia has been a world leader in efforts to protect the ozone layer, the main line of defense against ultraviolet radiation emitted by the sun. Ultraviolet radiation induces the formation of thymine dimers that cause mutation of skin cells if not repaired before DNA replication. Mutations of tumor suppressor genes can lead to uncontrolled cell growth. Ultraviolet radiation also causes immunosuppresion that allows skin cancers to become established. Basal cell carcinoma, squamous cell carcinoma, and melanoma are types of skin cancer caused by sun exposure, though each form is associated with a different pattern of exposure. Australia has the highest rate of skin cancer in the world, due to a combination of tropical latitude, fair-skinned population, outdoor lifestyle, and high amount of ambient ultraviolet radiation. Widespread opinions about tanning and health benefits of sunlight lead many Australians to intentionally overexpose themselves to the sun. State cancer councils have developed sun safety and awareness campaigns, such as “Slip! Slop! Slap!” and “SunSmart,” to educate the population about sun exposure and encourage early detection of skin cancers. Gradual changes in knowledge and behavior indicate that the fight against skin cancer can be won.
Tanning can be harsh to your skin. The light coming from the sun contains different wavelengths of ultra violet (UV) waves. The two types of waves concerned about are UVA rays and UVB rays. UVA rays are long waves that cause more damage than a UVB ray. UVA rays penetrate deeper into your skin and cause tanning (“The Dangers of”). More and more exposure to UVA rays can cause permanent damage ...
Tanning affects the human skin through ultraviolet radiation, part of the spectrum of light that omits from the sun to the surface of the earth. Ultraviolet A rays are the longer ultraviolet rays that are projected, and these rays penetrate deep into the layers of skin, causing a tanning effect (Harvard Women's Health Watch, 2). It does this by penetrating into the lower layers of skin, or the epidermis, and triggering cells known as melanocytes to make melanin, the brown pigment that causes tanning (Hyde, Patrice, MD, 1). They account for most of the ultraviolet components emitted by lamps in tanning beds, because they are associated with an almost immediate tanning effect (Brady, Mary S, 2). The shorter rays are ultraviolet B rays, and these rays only reach the outer superficial skin cell layer, also known as the epidermis (Harvard Women's Health Watch, 2). UVB rays, therefore, are the actual cause of sunbur...
The process of photosynthesis is present in both prokaryotic and eukaryotic cells and is the process in which cells transform energy in the form of light from the sun into chemical energy in the form of organic compounds and gaseous oxygen (See Equation Below). In photosynthesis, water is oxidized to gaseous oxygen and carbon dioxide is reduced to glucose. Furthermore, photosynthesis is an anabolic process, or in other words is a metabolism that is associated with the construction of large molecules such as glucose. The process of photosynthesis occurs in two steps: light reactions and the Calvin cycle. The light reactions of photosynthesis take place in the thylakoid membrane and use the energy from the sun to produce ATP and NADPH2. The Calvin cycle takes place in the stroma of the chloroplast and consumes ATP and NADPH2 to reduce carbon dioxide to a sugar.
Sun shine contain ultraviolet ray which can cause the sunburn or even skin cancer. According to Cancer Council in Australia, Australia has highest incident rate of skin cancer in the world. More than 430000 Australians are diagnosed with skin cancer each year. There are approximately 60 percent of people who have got skin cancer will survive greater than five years after they diagnosis (Cancer Council Australia, 2014). In order to protect people under the sun, the sun protective behaviour is significant necessary.
Over all, skin cancer is known to be a very common and dangerous cancer among the U.S.. Although there is no superior or particular cause known for it, it can be reduced by reducing radiation exposure from the sun and also tanning booths and beds. If not attempting to prevent it by staying out of the sun, and seeking not seeking shade and so forth, protection such as longer clothing garments that better cover the body as well as hats and sunglasses can help to eliminate direct exposure and reduce some of the damages that may occur. Certain amounts of sun light are healthy for the body as it provides vitamin- D which the body needs to maintain a healthy life style, though it is crucial not be over exposed as reverse side affects may occur, causing more harm than good.
Scientists have performed many different tests and studies to learn more about high exposure to UV. Close observation of cells have shown that sunlight, natural or artificial, can cause mutations or DNA damage in cells. This can lead to further damage which will then be passed down through generations. Another study scientists perform is on animals. Scientist will expose your typical lab animals to UV rays, and this test typically results in skin cancer on the animal. These studies have been performed with UVA, UVB, and UVC, and they have all proven
Most of the light energy from the sun is emitted in wavelengths shorter than 4,000
UV radiation causes significant damage to human skin, in the form of sunburns, aging, skin cancer, and nonmelanoma tumors. Human skin damage is primarily a result of tanning. The
Skin Cancer is caused by hereditary factors, overexposure to the sun, and weak immune systems. (“Skin Cancer” infotrac.com) One reason people tend to get skin cancer is when someone in your family has passed their genes down to you, known as hereditary. Normally hereditary is one of the causes in the development of melanoma. For all types of skin cancers, overexposure of the skin to UV radiation in sunlight is the most frequently blamed source of skin cancer. “Research suggests that sunburns received early in one’s childhood can lead to skin cancer later in life” (“Skin Cancer” infotrac.com). For example, when someone gets sunburned, you usually don’t know till ten to twenty years after and that’s why people don’t get skin cancer till they reach their twenties.
...cations. Many people will find that amount of sunlight they receive has little or no impact on the state of their psoriasis, but in the cases where the light therapy has worked, it seems to reduce the appearance of the lesions greatly. Obviously, the risk of the UV light therapy is the possible threat of skin cancer.
...s and hoses, control buttons, switches, hand pieces, and X-ray units (Collins). After every patient’s visit, the operatory is to be sterilized and disinfected. All areas that were that were not covered with a barrier, or if the barrier was compromised, must be wiped down with surface disinfectants similarly used in hospitals. OSHA requires disinfectants to be potent enough to fight against HIV and HBV infections (Collins). If there is any blood present on a surface, tuberculocidal type disinfectant should be utilized.
Photosynthetic pigments are essential for life because they allow photosynthesis to occur by capturing sunlight which is then used alongside carbon dioxide and water to form organic compounds such as glucose and oxygen. The pigments allow the conversion of light energy to chemical energy which other organisms can benefit from. Oxygen is utilised by other organisms in aerobic respiration. The different pigments present in the chloroplasts allow a wide variety of wavelengths of light to be absorbed for efficient photosynthesis and provide colours to the plant to attract pollinators.
Radiation is one of the most dangerous and easiest way of having health effects. Radiation was first discovered by Roentgen. Hazards are the first things people need to know in order to understand what it can do to your body. It causes many health effects on everyone out in the world. It harms people in the dentistry and field and even in the medical field. Normal people out the world can also be exposed when coming into one of these offices and getting x-rays of some type.
Application such as the sun emits most of its radiation in the visible range which our eyes recognize as the color of rainbow.