Describe the Uses and Dangers of Ultraviolet Radiation

X-ray production as inverse of photoelectric effect. However the main risk amongst welders is for inflammation of the cornea and conjunctiva commonly known as arc eye or flash.

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UV-A 315400 nm UV-B 280315 nm UV-C 100280 nm The main source of UV exposure is the sun.

. UV radiation is widely used in industrial processes and in medical and dental practices for a variety of purposes such as killing bacteria creating fluorescent effects curing inks and resins phototherapy and suntanning. Prolonged exposures increase the risk of skin cancer. The risk of melanoma of the skin increasing by 75 percent when tanning bed use.

These rays can cause skin cells to age and can cause some indirect damage to cells DNA. Exposure to UV accounts for 90 percent of the symptoms of premature skin aging. Ultraviolet waves can cause skin to age prematurely and increase the risk of skin cancer.

Ultraviolet A rays UVA The atmosphere does little to shield these raysmost UVA radiation reaches Earths surface. UVA rays cause skin aging and eye damage and can lower your bodys ability to fight off illness. UV radiation is divided into 3 main groups.

Lies between x-ray and visible light. However the use of UV radiation in a biological safety cabinet presents a number of problems. X-rays produced when high-energy electrons collide with target.

Excess exposure to UV causes skin inflammation and possibly even skin cancer or permanent eye damage. Uses and dangers page 1 Introduction Although X-rays have many uses people generally associate them with their use in medical. Electromagnetic radiation with a frequency range of 75 x 1014 to over 1015 Hz and wavelengths from 400 nm to below 290 nm.

UV-C generally dissipates in the atmosphere and seems to have little damaging effect. It has been suggested that UV radiation increases the risk of. In its mildest form sunburn consists of a reddening of the skin called erythema.

Bypassing shields can expose personnel to acutely dangerous levels of UV-C radiation. UV in Light Cancer Treatment. Ultraviolet light in sunlight can cause the skin to tan or burn and can also damage eyes.

Excessive sun exposure is associated with several health risks including the acceleration of skin aging and the promotion of skin cancers such as basal cell carcinoma squamous cell carcinoma and malignant melanoma. UVA rays are mainly linked to long-term skin damage such as wrinkles but they are also thought to play a role in some skin cancers. Also known as leukoderma.

Longwave UV radiation UV-A accounts for up to 95 of the UV radiation that reaches the earths surface. Avoid direct skin exposure to UVC radiation and never look directly into a UVC light source even briefly. Patients receive drugs called psoralens which react to UVA light treatment and slow the growth of cells of skin lymphoma as well as eczema psoriasis and vitiligo.

Arc eye is caused by UV radiation. Sunlight and indoor ultraviolet UV induced tanning is a common behavior especially among adolescents young adults and individuals with lighter skin. The UV spectrum consists of three regions.

The many forms of radiation that are used include electromagnetic waves of widely differing wavelengths eg radio waves visible light ultraviolet radiation X rays and gamma rays as. However UV-A and UV-B have damaging effects on exposed soft tissues such as skin and eyes. UV radiation can also cause cataracts and weaken the immune system source.

A chronic skin condition that causes loss of pigmentation resulting in patches of pale skin. The current version of the NSF International Standard 49 dismisses the use of UV in a BSC. UVC radiation can cause severe burns of the skin and eye injuries photokeratitis.

Premature wrinkling is common in people who have been exposed to the sun over long periods of time as are age spots and uneven complexions. Gamma rays can also damage or kill the cells in a persons body. While exposure to UV light is a known risk for skin cancer some cancerous skin conditions can be treated using UV light.

Damages immune system Over-exposure to UV radiation has a harmful suppressing effect on the immune system. This damages the outmost protective. The CDC and NIH in their joint pamphlet Primary Containment for Biohazards.

Scientists believe that sunburn can change the distribution and function of disease-fighting white blood cells in humans for up to 24 hours after exposure to the sun. Fluorescent substances are used in energy-efficient lamps. Ultraviolet UV radiation occupies the portion of electromagnetic spectrum from 100 to 400 nanometers nm.

X-rays can pass diagnostics. Selection Installation and Use of Biological Safety Cabinets 2nd Ed have. High doses of UV radiation kill most of the skin cells in the upper skin layer and cells that are not killed get damaged.

Ultraviolet radiation UV UV is generated by all arc processes. UVA rays also contribute to. Detection of UV and IR radiation.

UVA rays have the least energy among UV rays. Exposure from the sun is typically limited to the UV-A region since the earths. This appears shortly after UV radiation exposure and reaches a maximum intensity between 8 and 24 hours.

The use of ultraviolet UV lights in biosafety cabinets BSCs has enjoyed a long history. The medium wave UV UV-B causes skin burns erythema reddening of the skin and darkening of the skin. One of the major downsides of UV radiation is that it advances the signs of aging.

Both UV-A and UV-B rays causing DNA damage which can lead to skin cancer in laboratory animals and humans. The uses of radiation in diagnosis and treatment have multiplied so rapidly in recent years that one or another form of radiation is now indispensable in virtually every branch of medicine.

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