Which are ultraviolet ray

Which are ultraviolet ray
Xia Ri's arrival, people begin excessive realizing the shining of sunshine, and shining suddenly and violently seriously to skin. Go down, will cause, will cause the intersection of skin and erythema, swelling even blister for a long time so. These were not caused by sunshine injury of the skin, but was the ultraviolet ray. Thus, the injury to the skin of ultraviolet ray is very great. Please take more care.
The scientist has already found: There are a layer of ozone layers in atmosphere of 15- 50 kilometers of surface of the earth.
Though only several millimetre thick, can most harmful the intersection of shortwave and piece (UVC) under ultraviolet ray Absorb, lose totally nearly, so it known as " the natural the Great Wall " of the earth ,Natural umbrella of human health. Unfortunately, with the development at full speed of modern industry, the industry, means of transportation (mainly the plane) Freon gas in waste gas and refrigeration apparatus discharged,etc., cause the destruction of the ozone layer already more and more serious. The scientist of U.S.A. had already found a ozone "hole" above the Antarctic in 1978. In this 20 years, the cavity is still expanding constantly, the whole ozone layer is becoming thin constantly too. The total amount of ozone layer on the ground of our country has already dropped by 14%. According to statistics: The ozone layer reduces by 1% each time, ultraviolet intensity will increase by 1- 2% on the ground, the incidence of the human malignant tumour will increase by 3%, patient will increase cataract by 0.5%.
The ultraviolet ray is being paid close attention to the harmfulness of human health by people, the past ten years, in the subsidiary clinic of dept. of dermatology of Huashan hospital of our Fudan University, because all kinds of dermatosis incidence that sunlight and ultraviolet ray bring out increases at double. For instance: Sunburn, photosensitive dermatitis, chronic actinic dermatitis, skin porphyrin disease, sunlight keratosis, malignant black plain tumour,etc.. To the high requirement that the skin improve looks with people, the skin only wears out and already becomes a hot subject for research too.
Treatment of skin pathological change and cosmetic problem caused to these ultraviolet rays, still lack the safe and effective means at present, still lie in preventing mainly, for example: Try hard to keep out of the sun. The sensitive person of skin goes out to wear topees, the sun-proof skin care product for external use, pay attention to avoiding taking or exposed to some medicine, food, job sensitive to light and exposed to things and sterilize bactericides. But often impossible to defend, must rely on some to have medicine against oxidation. Because ultraviolet ray it produces biological mechanisms of effect to be biological the intersection of corner and function of taking of it mainly to human skin, too much active oxygen free radicals produce the damage which cause skin cells and wither to die. Commonly used resisting oxygen free-radical medicine is as follows, on clinic Vitamin C, E, - carrotene, coenzymatic Q10,etc. and green tea and containing preparation of selenium,etc..
The editor recommends:Ultraviolet definition
|