Sun tanning describes a darkening of the skin (especially of fair-skinned individuals) in a natural physiological response stimulated by exposure to ultraviolet (UV) radiation from sunshine or from artificial sources such as a tanning bed. With excessive exposure to ultraviolet‚ a sunburn can develop. Cause and effect Two different mechanisms contribute to the UV-induced darkening of the skin. Firstly the UVA-radiation generates oxidative stress which in turn oxidises pre-existing melanin. This
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UNIT ONE: Forensic Science II Text Questions Please complete the following questions. It is important that you use full sentences and present the questions and answers when you submit your work. Submit the work as a file attachment. This means you complete all work in a word processing document (e.g.‚ Microsoft Word) and attach the file using the dropbox tool. Use the Unit 1: Text Questions dropbox basket. The answers to the Review & Critical Thinking questions are worth 10 points. Review Questions
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Donalyn Manalo IV-LAUREL Topic: Atmospheric Phenomenon / Ozone Depletion: Effects to Natural Resources Thesis or Main Idea: Ozone Depletion is an atmospheric phenomenon which destroys the stratospheric ozone layer that shields the earth from ultraviolet radiation which is harmful to life. Outline: I. Introduction II. Causes and Effects of Ozone Depletion A. Causes of Ozone Depletion Human Activities Ozone Depleting Substanc Climate Change Increase
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exposure to sunlight‚ especially with a history or severe‚ blistering sunburns‚ increases a person’s risk of developing melanoma. People with a history of at least 10 blistering sunburns are two times more likely to develop melanoma. Exposure to ultraviolet light by using tanning beds also increases melanoma
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randomized trials found that the most probable reason why sunscreen use increased the risk of melanoma was that by delaying sunburn occurrence‚ these products extended the time spent in the sun” (Autier 40). Research finds that the exposure to ultraviolet radiation can be dangerous. Tanning salons‚ the misuse of sunscreens‚ and overexposure to the sun’s radiation increase chances of melanoma. The beginning of this paper looks at the situations in which people put themselves in where the risk of melanoma
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few topical medications that may be used to treat BCC. Melanoma The most dangerous form of skin cancer‚ these cancerous growths develop when unrepaired DNA damage to skin cells (most often caused by ultraviolet radiation from sunshine or tanning beds) triggers mutations (genetic defects) that lead the skin cells to multiply rapidly and form malignant tumors. These tumors originate in the pigment-producing melanocytes in the basal layer of the epidermis
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GM- free campaign (gene ethics) Background Australian GM crop production is increasing continuously. Australian has had the largest proportion GM crops in the world. Risks posed by GM trials on Australian’s health‚ economy and environment are rapidly spreading. In order to gain commercial benefits‚ the research development of Genetically Modified (GM) food in Australia is conducted by biotech corporations. Consumers‚ farmers‚ the environment and the economy are all affected by GM food. Target
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It also helps animals and us humans to grow and develop as well. • If you get regular exposure to sunlight‚ it will help protect your skin in the long run. That is because your body will build up a natural resistance to the harmful effects of ultraviolet light. • Sunlight lowers cholesterol. The sun converts high cholesterol in the blood into steroid hormones and the sex hormones we need for reproduction. In the absence of sunlight‚ the opposite happens; substances convert to cholesterol. • Sunlight
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Ideas about the solar system Our understanding of the solar system has changed over many centuries. Scientists such as Ptolemy‚ Copernicus and Galileo added their ideas to our changing understanding. We observe the universe using a variety of equipment‚ from telescopes to orbiters and landers. Models of the solar system The planets and the Sun orbit the Earth in Ptolemy’s model. Our understanding of the universe has changed over time. Different civilisations have created different models to
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Friedrich Wolff. Friedrich Wolff was a German scientist who invented the tanning bed in 1978. Friedrich invented this on accident. He did this when he was doing a study on the positive side effects of ultraviolet light on athletes. Then he noticed a side effect about the skin when under ultraviolet light‚ he saw that the skin became a nice tan color. Later on he eventually brought the tanning industry to America. Years later to present day tanning has become a huge business‚ and a common hobby throughout
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