Objective Solar ultraviolet （UV） radiation is an important environmental factor that affects human health. The understanding of diurnal variations of UV radiation at anatomical sites may be helpful in developing way...Objective Solar ultraviolet （UV） radiation is an important environmental factor that affects human health. The understanding of diurnal variations of UV radiation at anatomical sites may be helpful in developing ways to protect humans from the harmful effects of UV radiation. Methods In order to characterize the diurnal variations, the UV exposure values were measured at 30 min intervals by using Solar-UV Sensors and a rotating manikin in Shenyang city of China （41°51＇N, 123°27%）. Measurement data for four representative days （in each of the four seasons respectively） were analyzed. Results The diurnal variations in solar UV radiation at the shoulder, the forehead and the chest were similar to those associated with a horizontal control measurement. However, the diurnal variations at the eye and the cheek exhibited bimodal distributions with two peaks in spring, summer and autumn, and a unimodal distribution in winter. The UV exposure peaks at the eye and the cheek were measured at solar elevation angles （SEA） of about 30° and 40°, respectively. Conclusion The protection of some anatomical sites such as the eye from high UV exposure should not be focused solely on the periods before and after noon, especially in the places and seasons with high SEA.展开更多
目的：测定贵阳地区正常人群长波紫外线（UVA）、中波紫外线（UVB）的最小红斑量（MED）。方法：以SUV-l000型日光紫外线模拟器作为照射光源,测定190例健康志愿者腹部正常皮肤UVA-MED及UVB-MED,比较不同皮肤类型、性别、年龄及季节受试...目的：测定贵阳地区正常人群长波紫外线（UVA）、中波紫外线（UVB）的最小红斑量（MED）。方法：以SUV-l000型日光紫外线模拟器作为照射光源,测定190例健康志愿者腹部正常皮肤UVA-MED及UVB-MED,比较不同皮肤类型、性别、年龄及季节受试者UVA-MED及UVB-MED。结果：190例志愿者UVA-MED中位数为48.25 J/cm2,UVB-MED为35.24 m J/cm2,男性UVA-MED和UVB-MED中位数均高于女性（P〈0.01）,Ⅳ型皮肤MED中位数亦均显著高于Ⅲ型皮肤（P〈0.01）;男性10～29岁组及30～49岁组UVA-MED明显高于≥50岁组（P〈0.01）,10～29岁组UVB-MED高于30～49岁组及≥50岁组（P〈0.05）;男性夏季UVA-MED显著低于春、秋两季（P〈0.01）,女性夏季UVA-MED亦显著低于春、冬两季（P〈0.01）;男、女性夏季UVB-MED低于春、秋、冬季（P〈0.05）。结论：皮肤日光反应类型、性别、年龄及季节是影响贵阳地区人群MED的重要因素。展开更多
基金supported by the National Natural Science Foundation of China(NSFC30700652,NSFC 30800895)which for the Doctoral Program of Higher Education of China(20070159022)the Liaoning Provincial Science and Technology Development Fund (20062087).
文摘Objective Solar ultraviolet （UV） radiation is an important environmental factor that affects human health. The understanding of diurnal variations of UV radiation at anatomical sites may be helpful in developing ways to protect humans from the harmful effects of UV radiation. Methods In order to characterize the diurnal variations, the UV exposure values were measured at 30 min intervals by using Solar-UV Sensors and a rotating manikin in Shenyang city of China （41°51＇N, 123°27%）. Measurement data for four representative days （in each of the four seasons respectively） were analyzed. Results The diurnal variations in solar UV radiation at the shoulder, the forehead and the chest were similar to those associated with a horizontal control measurement. However, the diurnal variations at the eye and the cheek exhibited bimodal distributions with two peaks in spring, summer and autumn, and a unimodal distribution in winter. The UV exposure peaks at the eye and the cheek were measured at solar elevation angles （SEA） of about 30° and 40°, respectively. Conclusion The protection of some anatomical sites such as the eye from high UV exposure should not be focused solely on the periods before and after noon, especially in the places and seasons with high SEA.
文摘目的：测定贵阳地区正常人群长波紫外线（UVA）、中波紫外线（UVB）的最小红斑量（MED）。方法：以SUV-l000型日光紫外线模拟器作为照射光源,测定190例健康志愿者腹部正常皮肤UVA-MED及UVB-MED,比较不同皮肤类型、性别、年龄及季节受试者UVA-MED及UVB-MED。结果：190例志愿者UVA-MED中位数为48.25 J/cm2,UVB-MED为35.24 m J/cm2,男性UVA-MED和UVB-MED中位数均高于女性（P〈0.01）,Ⅳ型皮肤MED中位数亦均显著高于Ⅲ型皮肤（P〈0.01）;男性10～29岁组及30～49岁组UVA-MED明显高于≥50岁组（P〈0.01）,10～29岁组UVB-MED高于30～49岁组及≥50岁组（P〈0.05）;男性夏季UVA-MED显著低于春、秋两季（P〈0.01）,女性夏季UVA-MED亦显著低于春、冬两季（P〈0.01）;男、女性夏季UVB-MED低于春、秋、冬季（P〈0.05）。结论：皮肤日光反应类型、性别、年龄及季节是影响贵阳地区人群MED的重要因素。
