Introduction The evolution of most forms of life has occurred in an environment exposed to the ultraviolet (UV) and visible radiation emanating from the sun. When molecules in living cells absorb photons in this region of the electromagnetic spectrum they are promoted to excited electronic states and this process can have profound biological consequences. In general, visible wavelengths (400-78...

BACKGROUND UV-radiation is the most important causative factor for malignant melanomas of the skin. However, this is not the case for melanomas on sun-sheltered body surfaces. The aim of this study was to investigate if human herpes virus DNA could be found in malignant melanomas in sun-sheltered body areas and if these viruses play a role in the development of extracutaneous melanomas. MATER...

Ultraviolet radiation (UVR) has been scientifically proven to cause skin disorders such as sunburn, cancer and the symptoms of chronic exposure. Natural sun screening compounds have recently gained tremendous attention from cosmetic cosmeceutical sectors for treating hyperpigmentation aging. A wide range natural UV-absorbing used replace or reduce number synthetic sunscreen molecules. One prima...

Measurements of underwater solar ultraviolet radiation (UV-R, 280 to 400 nm), particulate (PPP) and dissolved (DPP) primary and bacterial (BP) production allowed us to infer the respective contribution of UV-B (280 to 315 nm) and UV-A (315 to 400 nm) in algal–bacterial interactions in the southwest lagoon of New Caledonia. Differences in and between activities were assessed by in situ exposure ...

The dramatic rise in incidence of malignant melanoma experienced by populations both within the United States and throughout the world over the last several decades has been attributed to enhanced exposure to the UV spectrum of sunlight radiation. This hypothesis can now be tested using genetically engineered mouse models predisposed to malignant melanoma. Here we use melanoma-prone transgenic ...

There is no doubt that solar ultraviolet (UV) exposure is the most important environmental risk factor for the development of non-melanoma skin cancer. Therefore, sun protection is of particular importance to prevent these malignancies, especially in risk groups. However, 90% of all requisite vitamin D has to be formed in the skin through the action of the sun-a serious problem, for a connectio...

BACKGROUND Sun protection materials have been one of the major concerns in pharmaceutical in-dustry since almost one century ago. Various materials have been found to have such an effect but there are still many unknown substances that have not been discovered. Objective : To introduce a novel mineral-based sun lotion with considerable UV absorption properties compared to commercially available...

OBJECTIVE To assess when sunburn occurs and who experiences sunburn by personal UV dosimetry and diaries. DESIGN Open prospective observational study. SETTING University hospital. PARTICIPANTS A convenience sample of 340 Danish volunteers: children, adolescents, indoor workers, sun worshippers, golfers, and gardeners (age range, 4-68 years). MAIN OUTCOME MEASURES Subjects recorded sunbu...

Healthier life styles include increased outdoors time practicing sports and walking. This means increased exposure to the sun, leading to higher risk of sunburn, photoaging and skin cancer. In addition to topical barrier products, oral supplementations of various botanicals endowed with antioxidant activity are emerging as novel method of photoprotection. Polypodium leucotomos extract (PL, comm...

Sunscreens have long being recognized as substances to provide effective protection against the detrimental effects of solar radiation. The deleterious effects of sun exposure can be either acute (e.g. sunburn and drug-induced photo toxicity) or chronic (potential long-term risks of repeated sun exposures like solar elastosis, keratoses, induction of skin cancers, and alteration of immune respo...