What do actinic mean?
Definition of actinic : of, relating to, resulting from, or exhibiting chemical changes produced by radiant energy especially in the visible and ultraviolet parts of the spectrum actinic light actinic keratosis.
What does actinic damage mean?
Actinic damage, also called sun damage, represents skin changes due to excessive sun exposure. Ultraviolet light A (UVA) interferes with DNA repair through the release of reactive oxygen, resulting in oxidation of both protein and lipids, whereas ultraviolet light B (UVB) causes DNA mutations.
What causes actinic?
An actinic keratosis is caused by frequent or intense exposure to UV rays from the sun or tanning beds.
What is non actinic light?
In photography Actinic light was first commonly used in early photography to distinguish light that would expose the monochrome films from light that would not. A non-actinic safe-light (e.g., red or amber) could be used in a darkroom without risk of exposing (fogging) light-sensitive films, plates or papers.
What is actinic Prurigo?
Actinic prurigo, also known as prurigo or hydroa aestivale or Hutchinson summer, is a photodermatosis that is characterized by intensely pruritic papulonodular lesions, primarily but not exclusively affecting sun-exposed areas.
What is actinic degeneration?
Actinic keratosis is a precancerous growth on the skin caused by long-term exposure to ultraviolet light. It is also known as solar keratosis. Actinic keratosis often appears in groups of several growths. The condition surfaces most often on areas of the body that are exposed to sunlight regularly.
What is the best treatment for actinic keratosis?
Freezing (cryotherapy). Actinic keratoses can be removed by freezing them with liquid nitrogen. Your doctor applies the substance to the affected skin, which causes blistering or peeling. As your skin heals, the damaged cells slough off, allowing new skin to appear. Cryotherapy is the most common treatment.
Is actinic light good?
Not only is actinic lighting beneficial to photosynthetic invertebrates, it is also aesthetically pleasing to the eye when used to supplement “daylight” lighting. Freshwater aquarium plants benefit from lighting with a Kelvin temperature in the range of 5500 – 6500 degrees.
What is actinic wavelength?
Most actinic lighting for aquariums has a wavelength of about 420-460nm. The higher end of this range (460nm) produces a more blue color light, while the color shifts to purple approaching the lower end (420nm). This type of lighting is still well within what we are capable of seeing.