review… moving across spectrum in this direction, energy and frequency decrease while wavelength...
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Review…
Moving across spectrum in this direction, energy and frequency decrease while wavelength increases.
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Distribution of UV Light across the Globe
Latitudes are shown on the left (latitude helps define a location on Earth, specifically how far north or south of the equator a site is).
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Folate (Folic Acid) BackgroundBabies whose mothers did not have enough folate are at risk forserious birth defects, including spina bifida.
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Folate (Folic Acid) BackgroundThe safest way to prevent this type of birth defect is to take a vitamin which contains 400-800 micrograms of folic acid. Dark green leafy vegetables and many (but not all) breakfast cereals, pastas and rice varieties also contain folic acid.
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Folate and UV Radiation
One group (called “patients”) was exposed to UV-light, while “normals” were not so exposed.
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Folate and UV Radiation (cont’d)Four samples of human plasma were tested for folate concentration before and after exposure to UV light.
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Vitamin D and UV Radiation Dotted area = enough sunlight to meet all of a human’s requirement for vitamin D3 throughout all months of the year.
Note: Vitamin D3 is not produced to toxic levels when high quantities of sunlight are present.
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Vitamin D and UV RadiationArea of narrowly-spaced obliques = there is not enough ultraviolet light to synthesize vitamin D3 in human skinfor at least 1 month of the year.
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Vitamin D and UV RadiationArea of widely-spaced obliques = there is not enough UV light for the skin to synthesize vitamin D3 inany month of the year
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Don’t Tan! (Whatever Color You Are…You’re Beautiful!)
Warning Signs…1. Open Sore2. Reddish Patch (looks irritated)3. Shiny Bump4. Pink Growth5. Scar-like Area
BCC = Most Common Type of Skin Cancer
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Seriously…Don’t Tan! It’s Just Not Worth It!
• In the US, 35% of adults and 55% of college students have tanned, and the study found there are more than 419,000 new skin cancer cases attributable to indoor tanning each year.
• Worldwide, there are more skin cancer cases due to indoor tanning than there are lung cancer cases due to smoking.
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