Near-ultraviolet (UV-A: 315-400 nm), "black-light," electric lamps were invented in 1935 and ultraviolet insect light traps (ILTs) were introduced for use in agriculture around that time. Today ILTs are used indoors in several industries and in food-service as well as in outdoor settings. With recent interest in photobiological lamp safety, safety standards are being developed to test for poten...

Malignant melanoma is one of the most dangerous forms of cutaneous malignancies [1] . It is classified as cutaneous melanoma and non-cutaneous melanoma based on the location of the lesion. Ultraviolet (UV) radiation exposure is a predisposing factor for cutaneous melanoma, although in other forms such as mucous and anorectal malignant melanomas, ultraviolet radiation does not play a significant...

The functional significance of phlorotannins as ultraviolet radiation screens in brown algae is presented. Spectral analysis of zoospore suspensions of the three Arctic Laminariales Saccorhiza dermatodea, Alaria esculenta and Laminaria digitata showed strong absorption in the UV waveband, characteristic of phlorotannins. An induction in the synthesis of the UV-absorbing compound in zoospore sus...

long exposure of uv radiation increases risk of skin diseases such as cancer and photoallergic reactions. uv-b (280-320 nm) radiation is mainly responsible for inducing skin problems. skin protection is a suitable method in the fight against ultraviolet radiation induced damage. various synthetic agents have been used as photo protective but because of their potential toxicity in humans, they h...

in this study, a computational fluid dynamics (cfd) model was developed to evaluate ultraviolet disinfection applesauce reactor. to simulate uv reactors, three sets of equations, including hydrodynamics, radiation and species mass conservation were solved simultaneously. the realizable k-e turbulence model and the discrete ordinate method were used to find the uv radiation profile through the r...

The radiation emitted by the sun known as ultraviolet radiation is related to several problems that might affect the human being. Most of times, people are well warned about the effects caused to the skin by the solar radiation overexposure but not about the effects to their eyes. This work aims at developing a real time ultraviolet (UV) index meter and a series of information systems that can ...

background bacillus thuringiensis is the most successful biological control agent used in agriculture, forestry and mosquito control. however, the insecticidal activity of the b. thuringiensis formulation is not very stable and rapidly loses its biological activity under field conditions, due to the ultraviolet radiation in sunlight. melanin is known to absorb radiation therefore photo protecti...

Skin cancer caused by ultraviolet (UV) radiation has risen to prominence in the occupational disease sector. When establishing the work-related preconditions for recognition of occupational diseases, it is important to investigate of the sick person’s exposure to UV radiation. Employees engaged in welding work in particular may be exposed to a high level of UV radiation. Although it is possible...