Quemduras and Sun Exposure 
The UV
corresponds to a type of light "invisible
" because it has a "wavelength
" shorter than visible light. Ultraviolet radiation is divided into 3: A
, whose effect is similar to the B, but 1000 times higher dose, the
B , despite being absorbed by the ozone layer, 10% reaches the surface. While beneficial effects, such as absorption of vitamin D, and aesthetically easy tanning, and also allows the sterilization of objects and surfaces, prolonged exposure causes burns, conjunctivitis, skin aging, and is main factor for skin cancer ; and
C, which is the most harmful, but fortunately the ozone layer absorbs all of this type.
The intensity of ultraviolet radiation reaching the earth depends on the time of day and season (height of the sun and day length), latitude (most intense between Ecuador and tropics), height (increased height), the thickness of the ozone layer
( the higher the concentration of O3 lower UV-B), climate (on a cloudy day in general received less radiation than on a sunny day), air pollution (more pollution, less radiation), the horizon (a broader horizons correlates with higher radiation) and reflective capacity of the surface (Snow reflects up to 85% of UV radiation you receive while water reflects only about 5%).
One of the most obvious effects of UV-B radiation is sunburn
, known under the technical name of
erythema. Dark-skinned people are protected from most of these effects by the pigment of your skin cells, the melanin
(pigment found in skin, gives color and has a protective effect on it). UV-B rays can also damage the genetic material of these cells and cause cancer
.
In relation to Skin Cancer , there are 3 types: basal cell carcinoma
the
squamous cell carcinoma or squamous , and
melanoma. As data, to practice a self-rule is applied
called "ABCD", indicating A symmetry of the lesion ,
B Ordes irregular,
C odor varied (brown black, sometimes without color), and D
iameter large greater than 6 mm . The most affected are those with skin type I (white skin, eyes and blond hair, tan little sun exposure), those with intense sun exposure for your type of work (farmers, fishermen, miners, etc.), or geographic location.
What to do? Wear a hat, sunglasses against UV-B radiation (the "gutter
" failing to protect in case), avoiding direct sunlight between 11 and 16 hours, use a sunscreen or sunscreen, and reapply every 2 hours.
The UV corresponds to a type of light "invisible " because it has a "wavelength " shorter than visible light. Ultraviolet radiation is divided into 3: A , whose effect is similar to the B, but 1000 times higher dose, the B , despite being absorbed by the ozone layer, 10% reaches the surface. While beneficial effects, such as absorption of vitamin D, and aesthetically easy tanning, and also allows the sterilization of objects and surfaces, prolonged exposure causes burns, conjunctivitis, skin aging, and is main factor for skin cancer ; and C, which is the most harmful, but fortunately the ozone layer absorbs all of this type. 
The intensity of ultraviolet radiation reaching the earth depends on the time of day and season (height of the sun and day length), latitude (most intense between Ecuador and tropics), height (increased height), the thickness of the ozone layer ( the higher the concentration of O3 lower UV-B), climate (on a cloudy day in general received less radiation than on a sunny day), air pollution (more pollution, less radiation), the horizon (a broader horizons correlates with higher radiation) and reflective capacity of the surface (Snow reflects up to 85% of UV radiation you receive while water reflects only about 5%). 
One of the most obvious effects of UV-B radiation is sunburn , known under the technical name of erythema. Dark-skinned people are protected from most of these effects by the pigment of your skin cells, the melanin (pigment found in skin, gives color and has a protective effect on it). UV-B rays can also damage the genetic material of these cells and cause cancer . 
In relation to Skin Cancer , there are 3 types: basal cell carcinoma the squamous cell carcinoma or squamous , and melanoma. As data, to practice a self-rule is applied called "ABCD", indicating A symmetry of the lesion , B Ordes irregular, C odor varied (brown black, sometimes without color), and D iameter large greater than 6 mm . The most affected are those with skin type I (white skin, eyes and blond hair, tan little sun exposure), those with intense sun exposure for your type of work (farmers, fishermen, miners, etc.), or geographic location. 
What to do? Wear a hat, sunglasses against UV-B radiation (the "gutter " failing to protect in case), avoiding direct sunlight between 11 and 16 hours, use a sunscreen or sunscreen, and reapply every 2 hours. 
