Ko nga hihi Ultraviolet he ngaru marama-kaha teitei me te kaha nui, kaore e taea te mohio te kanohi tahanga. Ko tona roangaru he iti iho i te 400nm, kei waho atu o te taha o waho o te mutunga o te hianga ultraviolet, no reira ka kiia ko nga hihi ultraviolet. Ma te awhe roangaru kua wehea ki UV-A (320nm 400nm), UV-B (275nm 3 2 0 n m), UV-C (2 0 nm 2 7 5 nm), UV-D (100nm 200nm) e wha Ko tenei roopu, kei reira A , B, me C, e toru nga roopu e kiia ana ko nga hihi ultraviolet kua whakakorehia. Ko nga roopu e toru o A, B, me C he awenga whakakino mate, ina koa mo te painga whakakino mate pai me te roopu C. E whakapono ana te ariā quantum marama ko te marama he ahua motuhake o te neke rawa. Ia roangaru o 253.7nm UV photon he 4.9EV pūngao. Ko te whakakorenga me te whakahoroatanga o te raina UV ki te wai ko te nuinga o te roangaru whakauru (254nm) o te waikawa karihi (DNA). Ka taea e te DNA te ngongo i te rauropi ultraviolet-kaha nui, ka puta te wehenga i runga i te alkali-a-te-a-ringa, ka hanga i te pyrimidine dimer; Ko te kape waikawa nucleic me te whakapuaki pūmua ka arahi ki te apoptosis. I tenei wa, he iti noa te rangahau ki te rangahau o nga hihi ultraviolet tuku iho, a ko te UV-LED hei momo hou mo te mahi whakakino mate he rereke ke atu ranei i te tikanga tuku iho. No reira. Mo etahi atu korero, nau mai ki te paetukutuku mana http:///show-23-155.html
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