Loading...
Please wait, while we are loading the content...
Similar Documents
Daily duration of vitamin D synthesis in human skin with relation to latitude, total ozone, altitude, ground cover, aerosols and cloud thickness.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Engelsen, Ola Brustad, Magritt Aksnes, Lage Lund, Eiliv |
| Copyright Year | 2005 |
| Abstract | Vitamin D production in human skin occurs only when incident UV radiation exceeds a certain threshold. From simulations of UV irradiances worldwide and throughout the year, we have studied the dependency of the extent and duration of cutaneous vitamin D production in terms of latitude, time, total ozone, clouds, aerosols, surface reflectivity and altitude. For clear atmospheric conditions, no cutaneous vitamin D production occurs at 51 degrees latitude and higher during some periods of the year. At 70 degrees latitude, vitamin D synthesis can be absent for 5 months. Clouds, aerosols and thick ozone events reduce the duration of vitamin D synthesis considerably, and can suppress vitamin D synthesis completely even at the equator. A web page allowing the computation of the duration of cutaneous vitamin D production worldwide throughout the year, for various atmospheric and surface conditions, is available on the Internet at http://zardoz.nilu.no/~olaeng/fastrt/VitD.html and http://zardoz.nilu.no/~olaeng/fastrt/VitD-ez.html. The computational methodology is outlined here. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.direct-ms.org/pdf/VitDGenScience/EngelsenDProdcuctionPP.pdf |
| Alternate Webpage(s) | https://vitamindwiki.com/dl1319 |
| Alternate Webpage(s) | http://www.direct-ms.org/sites/default/files/EngelsenDProdcuctionPP.pdf |
| Alternate Webpage(s) | http://www.direct-ms.org/pdf/VitDGenScience/Engelsen%20vitamin%20D%20synthesis.pdf |
| Alternate Webpage(s) | http://www.direct-ms.org/sites/default/files/Engelsen%20vitamin%20D%20synthesis.pdf |
| PubMed reference number | 16354110v1 |
| Volume Number | 81 |
| Issue Number | 6 |
| Journal | Photochemistry and photobiology |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Aerosol Dose Form Estimated Latitude:Angle:Point in time:Cancer.To be specified in another part of the message:Quantitative Medicine, East Asian Traditional Ozone Ultraviolet Rays Vitamin D computer science emotional dependency |
| Content Type | Text |
| Resource Type | Article |
