Cov yam ntxwv ntawm UV-resistant npuag
Cov yam ntxwv ntawm UV-ntaub npuag: UV-resistant npuag yog kev tiv thaiv cov khoom rau tib neeg lub cev kom tsis txhob muaj cov duab hluav taws xob ntau dhau. Tiv thaiv kev tiv thaiv duab tshav ntuj tiv thaiv kev ua kom tsis txhob raug mob rau tib neeg lub cev tau muaj txiaj ntsig los ntawm ntau thiab ntau tus neeg tau txais kev pab. UV hluav taws xob nyob rau hauv lub hnub ci daim duab tsis tsuas yog ua rau textiles fade Thiab embrittlement tseem tuaj yeem ua rau lub hnub ci thiab laus ntawm tib neeg daim tawv nqaij, tsim melanin thiab pigmentation, thiab ntau dua, nws tuaj yeem tsim kev txiav txim siab thiab ua rau tib neeg noj qab haus huv.
Cov cheeb tsam ultraviolet hauv tshav ntuj tuaj yeem muab faib ua peb ntu, peb tuaj yeem faib ua peb ntu. Thaj tsam nthwv dej ntu 400-320nm hu ua UV-A; cheeb tsam nthwv xob 320-280nm hu ua UV-B; cheeb tsam nthwv cua 280-200nm hu ua UV-C. UV-C Lub voos hluav taws xob luv luv, nws tau nqus huab cua, thiab tsis tuaj yeem ncav cuag lub ntiaj teb. UV hluav taws xob rau cov hnub ci txog 6% ntawm lub hnub ci, uas qhov feem ntawm UV-A yog qhov loj, thiab qhov feem ntawm UV-B yog me me. UV-A yuav nkag mus rau hauv daim tawv nqaij epidermal Nws ua rau cov leeg poob lawv cov tawv nqaij thiab tawv, ua rau tawv nqaij. UV-B muaj teeb meem kev mob tawv nqaij. Yog li, nws yuav tsum txhawm rau thaiv cov ntu luv-ntu ntawm UV-B thiab UV-A.
Qhov nqus ntawm ultraviolet lub teeb los ntawm daim tawv nqaij muaj feem xyuam rau nws txoj kev yoj. Qhov luv luv ntawm qhov ntev, qhov me me ntawm qhov tob tob nkag mus rau hauv daim tawv nqaij, thiab cov khoom tsis muaj zog melanin tom qab irradiation; ntev tshaj qhov ua ntom nti, ntau dua qhov tob ntawm kev nkag mus rau hauv daim tawv nqaij, thiab cov muaj zog melanin tso nyiaj tom qab tsis muaj kev cuam tshuam. Vim tias ntawm photochemistry Cov txiaj ntsig ntawm qhov tshuaj tiv thaiv, lub zog siab dua photon ntws tuaj yeem ua rau lub denaturation ntawm nuclear protein thiab qee qhov enzymes hauv lub cell.
Vim yog qhov ua kom tsis muaj zog ntawm cov duab tshav tiv thaiv sab hauv rau hauv cov ntaub so ntswg, cov nqaij sib sib zog nqus hauv qab daim tawv nqaij raug mob tsawg dua. Txawm li cas los xij, siv duab hluav taws xob ultraviolet tuaj yeem ua rau cov kev tiv thaiv ib puag ncig xws li nkees, kub taub hau, thiab tsaug zog. Qee tus neeg' s ntawm daim tawv nqaij ua xua rau UV hluav taws xob thiab hnub ci tshwm sim tom qab lub teeb. Dermatitis (tseem hu ua ziab tshav), khaus, ntxais ib ce, xoos ntawm daim tawv nqaij ntawm thaj chaw muaj kab mob, thiab tuaj yeem ua paug thiab nti.
