Parisi A V, Turnbull D J, Downs N, Smith D
Faculty of Sciences, University of Southern Queensland, Toowoomba, Australia.
Radiat Prot Dosimetry. 2012 Jul;150(3):278-82. doi: 10.1093/rpd/ncr418. Epub 2011 Nov 16.
A dosimetric technique has been employed to establish the amount of erythemal ultraviolet radiation (UVR) protection provided by facial hair considering the influence of solar zenith angle (SZA) and beard-moustache length. The facial hair reduced the exposure ratios (ERs) to approximately one-third of those to the sites with no hair. The variation in the ERs over the different sites was reduced compared with the cases with no beard. The ultraviolet protection factor (UPF) provided by the facial hair ranged from 2 to 21. The UPF decreases with increasing SZA. The minimum UPF was in the 53-62° range. The longer hair provides a higher UPF at the smaller SZA, but the difference between the protection provided by the longer hair compared with the shorter hair reduces with increasing SZA. Protection from UVR is provided by the facial hair; however, it is not very high, particularly at the higher SZA.
一种剂量测定技术已被用于确定面部毛发提供的红斑紫外线辐射（UVR）防护量，同时考虑太阳天顶角（SZA）和胡须长度的影响。面部毛发将暴露率（ERs）降低至无毛部位的约三分之一。与没有胡须的情况相比，不同部位的ERs变化有所减少。面部毛发提供的紫外线防护系数（UPF）范围为2至21。UPF随着SZA的增加而降低。最小UPF在53 - 62°范围内。在较小的SZA时，较长的毛发提供更高的UPF，但随着SZA的增加，较长毛发与较短毛发提供的防护之间的差异会减小。面部毛发可提供UVR防护；然而，其防护效果不是很高，尤其是在较高的SZA时。
