When Overexposure to sun UV radiation leads skin damage and increases the risk of cancer; thus, it is a factor in aging, which accelerate aging cancer. To determine Photoprotective potential was evaluated by biomechanical measurements tissue histopathological examination skin. Showed The group irradiated with exposed for 4 h (UV lamps, wavelength 365 nm, power 6 W) without Aloe vera showed sign...

BACKGROUND Due to the increase of solar ultraviolet radiation (UV) incidence over the last few decades, the use of sunscreen has been widely adopted for skin protection. However, considering the high efficiency of sunlight-induced DNA lesions, it is critical to improve upon the current approaches that are used to evaluate protection factors. An alternative approach to evaluate the photoprotecti...

We present mid–IR images of a 15′×15′ field in the south–west part of the Andromeda galaxy M 31 obtained with the ISOCAM camera (6′′ pixels) on board ISO. These broad–band images complement spectro–imaging observations of smaller fields (Cesarsky et al. 1998). We also present a 20′′ resolution far–UV image of a larger field at 200 nm obtained with the balloon–borne telescope FOCA 1000. These im...

In this work, we study the different components of UV Index, direct, diffuse, and global, for seven years erythemal measurements in a Mediterranean locality at Burjassot AtmoSpheric Station (BASS). The have been taken with three YES-UVB-1 radiometers: one provided shadow disk on Sun tracker; radiometer to measure global horizontal radiation; Sun-tracking direct radiation an especially designed ...

Xeroderma pigmentosum (XP) is a rare autosomal recessive genetic disorder characterized by defective DNA repair leading to clinical and cellular hypersensitivity to ultraviolet (UV) radiation and carcinogenic agents. Important clinical features are: Intense cutaneous photosensitivity, xerosis, poikiloderma, actinic keratosis, acute burning under minimal sun exposure, erythemas, hyperpigmented l...

The energy released in a solar flare is partitioned between thermal and nonthermal particle energy and lost to thermal conduction and radiation over a broad range of wavelengths. It is difficult to determine the conductive losses and the energy radiated at transition region temperatures during the impulsive phases of flares. We use UVCS measurements of O VI photons produced by 5 flares and subs...

Arsenic-induced skin cancer is a significant global health burden. In areas with arsenic contamination of water sources, such as China, Pakistan, Myanmar, Cambodia and especially Bangladesh and West Bengal, large populations are at risk of arsenic-induced skin cancer. Arsenic acts as a co-carcinogen with ultraviolet (UV) radiation and affects DNA damage and repair. Nicotinamide (vitamin B3) red...

UV radiation is one of the key factors ageing materials and thus limiting their service life time. Damages induced by UV radiation may be observed as changes in the properties of the material. Various types of weathering experiments are used to study the chemical and physical mechanisms behind the degradation process. Material samples are exposed to UV radiation and other environmental stress a...

The ultraviolet-B (UV-B) portion of the solar radiation functions as an environmental signal for which plants have evolved specific and sensitive UV-B perception systems. The UV-B-specific UV RESPONSE LOCUS 8 (UVR8) and the multifunctional E3 ubiquitin ligase CONSTITUTIVELY PHOTOMORPHOGENIC 1 (COP1) are key regulators of the UV-B response. We show here that uvr8-null mutants are deficient in UV...

OBJECTIVE To assess the inter-method reliability of the Ovarian Cancer in Alberta (OVAL) survey developed to estimate adult vitamin D exposure from sun and diet for every tenth year, against the longer Geraldton Skin Cancer Prevention Survey (the assumed 'gold standard'). We also estimated total vitamin D exposure using the OVAL survey. DESIGN A randomized crossover design to assess the inter...