Wolfgang Heering (auth.), Michael F. Holick (eds.)'s Biologic Effects of Light 2001: Proceedings of a Symposium PDF
By Wolfgang Heering (auth.), Michael F. Holick (eds.)
As people ventured into the 20 th century, the industrialized international locations have been faced with the scourge of rickets. even if solariums have been turning into universal within the early 1900s and phototherapy used to be becoming more popular end result of the awarding of a Nobel Prize to Finsen in 1903, it wasn't until eventually 1921 whilst Hess and Unger proven that rickets can be cured via publicity to daylight that the healthy advantage of solar publicity preferred. In 1941, Apperly (Cancer learn; 1: 191-195, 1941) famous that the occasional elevated danger of pores and skin melanoma used to be linked to a lowered danger of many different extra universal and critical cancers. The alarming raise within the variety of situations of dermis melanoma, particularly cancer, has brought on nice crisis concerning the unfavourable function of solar in overall healthiness. The 6th overseas Arnold Rikli Symposium at the Biologic results of sunshine used to be held in Boston, Massachusetts from June sixteenth - 18th, 2001. The aim of this Symposium was once to target the highly regarded perform of tanning both via sun or by means of man made mild resources and the final impression this tradition has on well-being and disorder. this system was once prepared by way of contributors of the clinical Advisory Committee and my co-chair emeritus, Professor Ernst G. Jung. this system Committee equipped a good state of the art application that was once enthusiastically obtained via the participants.
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Additional info for Biologic Effects of Light 2001: Proceedings of a Symposium Boston, Massachusetts June 16–18, 2001
Ultraviolet radiation dosimetry with polysulphone film. In: Diffey, BL, ed. Radiation Measurement in Photobiology . London: Academic Press, 1989: 135-139. , Solar dosimetry of the face: the relationship of natural ultraviolet radiation exposure to basal cell carcinoma localisation, 1979, Phys Med BioI, 1979; 24:931-939. Diffey BL. Kerwin M, Davies A, The anatomical distribution of sunlight, Br. J. Derm. 1977; 7:407-409. Dolin, PJ, Ultraviolet radiation and cataract: A review of the epidemiological evidence, Br J Ophthalmol, 1994; 78:478-482 and reprinted in Optometry Today Nov/Dec 1997.
Green grass reflects less than 1% and most artificial surfaces and rock normally reflects less than 10%. Two exceptions are ocean surf and white, gypsum sand, which reflect about 20-25%. " Open water reflects the entire sky (diffuse plus direct component) and can be of the order of 20%, although the direct, specular reflection from the sun's image is only about 2-3% of the incident, direct UV radiation. 4 % Black asphalt 5-9% Concrete pavement 8 - 12 % Atlantic beach sand (dry) 15 - 18 % Atlantic beach sand (wet) 7% Sea foam (surf) 25 - 30 % Dirty snow 59% Fresh snow 88% Table 1: Reflectance of ACGIHIICNIRP-ejJective solar UV-B from terrain surfaces (Source: Sliney, 1983) Ocular exposure is far more affected than skin exposure by these geometrical factors.
Shown in Figure 9, is a common batch of manufactured filters with a steep edge. The effects of a slight variation of only about 3 nm total in the shape of the filters are notably significant. 4---f---j---j---j---j---+--l ~ f! 1~~~~. ;o---t----+----j--t In t: I! I- 0,6 -151 --166 --·158 168 -169 0,4 +---+---+---j--"~~~'c:'----::>k---+--+--l -170 -171 ~-ery-norm o+---+-----+----j~--~---+_-_+--+-~ 295 297 299 301 303 305 307 309 nm Figure 9. , a linear scale oftransmission versus wavelength is shown and all filters are within a 3 nm bandwidth.
Biologic Effects of Light 2001: Proceedings of a Symposium Boston, Massachusetts June 16–18, 2001 by Wolfgang Heering (auth.), Michael F. Holick (eds.)