2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
UVA hluav taws xob yog qhov ua rau tib neeg tan. UVA rays nkag mus rau hauv qis qis ntawm cov epidermis, qhov uas lawv ua rau cov hlwb hu ua melanocytes (hais: mel-an-oh-sites) los tsim melanin. Melanin yog xim av xim uas ua rau tanning.
Y Puas yog UVA lossis UVB zoo dua rau tanning?
UVB rays ua rau tshav ntuj, thaumUVA rays ua rau tanningnrog rau cov tawv nqaij laus. Nws yog UVB rays uas cuam tshuam nrog cov protein nyob rau hauv daim tawv nqaij los hloov nws mus rau hauv vitamin D. Tanning txaj feem ntau emit UVA rays, uas yuav tsis txhim kho koj cov vitamin D.
YPuas UVA lossis UVB phem dua?
UVA rays, hos me ntsis qis dua UVB, nkag mus rau koj cov tawv nqaij ntau dua. Kev kis kab mob ua rau muaj kev puas tsuaj rau cov hlwb nyob rau sab hauv feem ntawm koj cov tawv nqaij saum toj kawg nkaus, qhov twg feem ntau cov qog nqaij hlav ntawm daim tawv nqaij tshwm sim. … Sij hawm dhau mus, UVA kuj ua rau kev laus ntxov ntxov thiab mob qog noj ntshav.
Koj puas tuaj yeem tau tan nrog qhov ntsuas UV ntawm 4?
Txawm tias UV Index tsuas yog 4, tshav kub kub tseem ua tau li ntawm 50 feeb. Sunburn tseem tuaj yeem tshwm sim thaum UV Index qis - nyob rau hnub huab cua, piv txwv li - tab sis nws feem ntau siv sijhawm ib teev lossis ntev dua. … Yog tias sab nraum zoov, nrhiav chaw ntxoov ntxoo thiab hnav khaub ncaws tiv thaiv, lub kaus mom dav dav thiab looj tsom iav dub.
YYuav ua li cas UV zoo tshaj rau tanning?
YZoo UV Index rau tanning
- UV Index 0 - 2. Tsawg raug. Lub sijhawm nruab nrab nws yuav siv sij hawm los hlawv: 60 feeb. …
- UV Index 3 - 5. Nruab nrabqib raug. Lub sijhawm nruab nrab nws yuav siv sij hawm los hlawv: 45 feeb. …
- UV Index 6 - 7. High exposure level. …
- UV Index 8 - 10. High exposure level. …
- 11+ UV Index. Qib raug heev.
Pom zoo:
Thaum lub caij ntuj no solstice lub hnub rays ci rau ntawm?
Thaum lub caij ntuj no solstice, lub hnub ci ncaj qha tshaj plaws ntawm lub Tropic ntawm Capricorn Tropic ntawm Capricorn Lub Tropic ntawm Capricorn (los yog Southern Tropic) yog lub voj voog ntawm latitude uas muaj cov ntsiab lus subsolar ntawm lub Kaum Ob Hlis Ntuj (los yog yav qab teb) solstice.
Puas gamma rays pom rau tib neeg lub qhov muag?
Lub teeb peb tuaj yeem pom, ua los ntawm cov xim ntawm tus zaj sawv, tsuas yog ib feem me me ntawm electromagnetic spectrum. Lwm hom teeb muaj xws li xov tooj cua nthwv dej, microwaves, hluav taws xob infrared, ultraviolet rays, X-rays thiab gamma rays - tag nrho cov uas yog imperceptible rau tib neeg ob lub qhov muag.
Yuav ua li cas tshem tawm tanning?
Txoj kev kom ploj mus ib txhis Exfoliation. Maj mam exfoliating ntawm daim tawv nqaij yuav pab tshem tawm cov pigmented tuag ntawm daim tawv nqaij los ntawm txheej txheej ntawm daim tawv nqaij. … cov khoom ua kom tawv nqaij. AAD pom zoo qee cov khoom xyaw ua cov tawv nqaij ua kom pom kev zoo.
Yuav ua li cas txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau pom kev pom?
Txawm li cas los xij, corneal collagen cross-linking - cov txheej txheem qib siab tau pom zoo los ntawm US Food and Drug Administration (FDA) hauv xyoo 2016 - tuaj yeem txhim kho qhov pom kev hauv cov neeg mob txhua hnub nyoog. Corneal collagen cross-linking (CXL) tsis yog kho rau keratoconus, tab sis nws tuaj yeem pab tiv thaiv tus mob kom tsis txhob mob hnyav.
Puas uv rays muaj zog dua rau hnub huab cua?
Tseeb, huab feem ntau zoo dua ntawm kev thaiv lub teeb pom kev zoo dua li UV. ultraviolet hluav taws xob tuaj yeem txhim kho tau zoo tshaj qhov tseeb-ntev qhov tseem ceeb ntawm hnub huab, tshwj xeeb tshaj yog thaum muaj huab cua cirrus thiab cumulus saum ntuj.
