Are there any studies on the role of UVB in telomere shortening or other markers of cellular aging in different tissues

How Tanning Happens. The sun's rays contain two types of ultraviolet radiation that reach your skin: UVA and UVB. UVB radiation burns the upper layers of skin ( ... UVA rays are longest, in the 315 nm to 400 nm range; UVB are shorter in length, in the 280 nm to 315 nm range; and UVC are the shortest, in the 100 nm to 280 Aug 19, 2020 ... The UVA/UVB ratio is highest in the morning and evening when the solar elevation angle is minimal, and lowest in the middle of the day when the solar elevation ... May 16, 2023 ... UVA, or Ultraviolet A, is a type of solar radiation that makes up a significant portion of the sunlight reaching the Earth's surface. It ... Skin Exposure to Narrow Band Ultraviolet (UVB) Light Modulates the Human Intestinal Microbiome ... The recent worldwide rise in idiopathic immune and inflammatory ... We recommend the ideal time for UVB phototheraphy between 11.00 am to 2.00 pm and for PUVASOL between 9.30 am to 11 am and 2 pm to 3.30 pm. Apr 2, 2025 ... Ultraviolet radiation is produced by high-temperature surfaces, such as the Sun, in a continuous spectrum and by atomic excitation in a gaseous ... Sep 15, 2017 ... UV radiation has enough energy to break chemical bonds. Due to their higher energies, UV photons can cause ionization, a process in which ... Jun 17, 2015 ... SPF only measures UVB rays; it doesn't tell you anything about protection from UVA rays, Kundu says. Solar radiation causes cutaneous malignant melanoma, squamous cell carcinoma of the skin and basal cell carcinoma of the skin.