Effects Of Uv Radiation On Fluoranthene

Ultraviolet (UV) radiation is present in normal sunlight and sunlamps. “The sun emits energy over a broad spectrum of wavelengths: visible light that [one] can see, infrared radiation that [one] feels as heat, and ultraviolet (UV) radiation that [one] cannot see or feel. UV radiation has a shorter wavelength and higher energy than visible light. It affects human health both positively and negatively” (U.S. EPA). There are multiple types of ultraviolet radiation known to scientists and each affects human in different ways. “The longer ultraviolet rays (UVA), which penetrate deep into the skin, are responsible for tanning. Shorter rays (UVB) damage superficial skin cell layers, causing sunburn” (Harvard). Medical researchers at the Skin Cancer Foundation found that “the cumulative damage caused by UV radiation can lead to premature skin aging (wrinkles, lax skin, brown spots, and more), as well as skin cancer” (Skin Cancer Foundation).

Chapter six of Tracking The Vanishing Frogs talks about frogs and sunbathing. It also talks about the UVB theory. Mountain yellow legged frogs can sometimes be seen sunbathing in Palm Springs , California. Ultraviolet radiation is light emitted by the sun. Another type is called uvb. It can be deadly. It is slowly beginning to reach earths surface as the ozone layer in the stratosphere thins. CFCs cause damage to the ozone layer. UVB causes skin cancer , cataracts and can weaken the immune system in humans. When it was found that Cascade frogs were dying they began to look for a reason why. After a while they decide to see if it was linked to UVB.

Ultraviolet light is present in sunlight. Generally the wavelengths are too short to be seen in the visible spectrum, it is present in sunlight, tanning beds, and black lights. (Lynch and Livingston, 2001) Earth’s atmosphere blocks

According to the United States Environmental Protection Agency (2010), ultraviolet (UV) rays are remarkably damaging to the skin without the proper protection. The National Weather Service and the EPA have developed the UV Index, a tool that predicts the level of UV radiation and indicates the risk, numerically. It is scale in which 0-2 indicates low risk of danger from sun rays, 3-5 indicates moderate risk, 6-7 indicates high risk, 8-10 indicates very high risk, and 11+ indicates extreme risk of harm. There are a considerable number of factors that influence an ultraviolet level, including stratospheric ozone layer, time of day, time of year, latitude, altitude, weather

Ultraviolet radiation is invisible rays that are part of the energy that comes from the sun. For example; Ultraviolet radiation can burn the skin, such as a sunburn and cause skin cancer (Medicinenet). The ozone layer is a layer of ozone (a colorless unstable toxic gas) in the upper atmosphere that prevents dangerous radiation from the Sun from reaching the surface of the Earth (Merriam-Webster). In correlation of the two together, we need the ozone layer to protect or animals and our plants from the ultraviolet radiation. Without the ozone layer being there it could damage the immune system to animals and humans, leaving many with skin cancer and eye cataracts (eco-action). The ozone layer is also important because it will have a negative

Oil has cytotoxic effects on aquatic life, affecting effecting cardiac abilities of fish. It is well known that oil spills leave nothing but disaster in their wake, but there may be death on a slightly lower, but hidden scale in aquatic life in lakes. Motor oil discharge may increase the heart rate of aquatic organisms, leading to death and other health problems. Sodium dodecyl sulfate, an oil dispersant commonly used in clean up operations, may produce the same harmful effects on aquatic life. The objective of this study was to determine if oil in fact did increase the heart rate of the daphnia magna, a water flea, as well as If SDS is a similar culprit. The heart rates of the daphnia before they were placed into treatments were standard and

The sunlight that reaches us is made up of two types of harmful rays: long wave ultraviolet A (UVA) and short wave ultraviolet B (UVB) There’s also a third type of ray, UVC, these are the shortest and strongest, but they are absorbed by the ozone layer and don’t typically reach the Earth ( Bianchi, J. et al. 2013). However, in many experiments UVC is used.

Ultraviolet waves are just beyond visible and are on the electromagnetic spectrum. They can reach a high enough level that can be harmful to humans, plants, and animals.

Ultraviolet (UV) light is an intermediate source of energy that can damage cells. The DNA in cells is especially sensitive to UV irradiation. The rings of the

88. Although these molecules allow some radiations at visible wavelengths, where most energy of sunlit is concentrated, to pass through, they absorb some of the loneger-wavelength, infrared emissions radiated from the Earth's surface, radiation that would otherwise be transmitted back into space.

When the ozone layer depletes and the earth is exposed to more UV radiation, there are known to be harmful effects on animals and ecosystems. In domesticated animals, it is common to see increased cases of skin and eye cancers when UV radiation levels increase. However, the effects of CFCs and ozone depletion are more noticeable in marine life. For example, many plankton are affected by the increased UV radiation, which can cause some of them to die. In marine ecosystems, plankton are the first level of the food chain, so their decreasing population will likely disrupt the saltwater and freshwater ecosystems (B.C. Air Quality, n.d.). It has also been found that to many animals, such as the sea urchin, UV radiation can act as a teratogen (see picture to the right), which causes damage to their developing embryos, which may result in a less healthy population in the long run. Also, it has been found that in some marine animals, UV radiation can act as an endocrine disrupter, and cause abnormalities in the hormone function of those animals. As a result of damaged embryos and hormone functions, populations of these animals may decrease, which will then damage food chains and ecosystems (Auby,

We often hear, especially in the warmer months of the year, about how we ought to be protecting ourselves from UV exposure. We are told of the importance of sunscreen and keeping ourselves covered when in direct sunlight. But why is protecting ourselves from UV light so important? According to the website, Livescience.com, UV light, or ultraviolet light, is a type of electromagnetic radiation that comes from the sun. You cannot see UV rays, which may be one of the things that makes it so dangerous. UV light can be very harmful to our bodies if we are exposed to too much, in one way, specifically, by sunburning. Every day, we are partially protected from UV light by the ozone layer. Nationalgeographic.com defined the ozone layer to be “a naturally

This layer is vital to all living organisms (humans, animals, plants) by keeps them safe from genetic damage due UV radiation. Ozone absorbs 90% of UVB radiation which is show to have harmful effects on humans and an important role in skin cancer.

Ultraviolet light, also known as UV light, is a type of electromagnetic radiation. Ultraviolet light comes from the sun and is invisible to the human eye. Although humans are constantly exposed to UV light, too much ultraviolet radiation could be potentially harmful to living tissue. Electromagnetic radiation is transmitted in waves or particles at different wavelengths and frequencies (Lucas 2015). This range is known as the electromagnetic spectrum which is split into

As UV-B radiation is naturally occurring, not a great deal can be reduced to prevent any naturally occurring amounts a plant species may receive (Madronich, et al., 1995). However, UV-B radiation exposure is being increased due to the effects of ozone depletion. Depletion of the ozone layer varies seasonally, with meteorological changes and with latitude (Kerr, et al., 1993). Depletion of ozone layers occurs from emissions of halogenated chemicals such as chlorofluorocarbons, the resulting of which is leading to an increase of solar UV-B radiation in the biosphere (Madronich, et al., 1995). When the ozone layer