Uma kukhulunywa ngemibhede yokushiswa kwesikhumba, izinhlobo ezimbili zokukhanya kwe-ultraviolet —I-UVAfuthiI-UVB— dlala indima enkulu ekushintsheni umbala wesikhumba sakho. Ukuqonda ukuthi le misebe isebenza kanjani kukusiza ukuthi ushintshe umbala wesikhumba ngempumelelo ngenkathi uvikela isikhumba sakho ekulimaleni okungenzeka.
1. Kuyini Ukukhanya kwe-UVA?
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Ubude bamagagasi:Ama-nanometer angu-315–400.
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Ukungena:Ifinyelela ekujuleni kwesikhumba (ungqimba lwesibili lwesikhumba).
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Umphumela:Kubangela ukufiphala kombala ngokushesha ngokufaka i-oxidizing i-melanin ekhona.
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Izingozi:Kusheshisa ukuguga kwesikhumba, kunegalelo ekuqhekekeni, futhi kungalimaza i-DNA ngokuhamba kwesikhathi.
Emibhedeni yokushiswa kwesikhumba, ama-UVA enza izimonyocishe 90–98%kokukhishwa kwe-UV.
2. Kuyini Ukukhanya kwe-UVB?
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Ubude bamagagasi:Ama-nanometer angu-280–315.
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Ukungena:Kuthinta kakhulu i-epidermis (ungqimba lwangaphandle lwesikhumba).
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Umphumela:Kuvuselela ama-melanocyte ukukhiqiza i-melanin entsha, okuholela ekubeni ne-tan ehlala isikhathi eside.
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Izingozi:Imbangela eyinhloko yokushiswa yilanga, ingalimaza namaseli esikhumba futhi yandise ingozi yomdlavuza.
Emibhedeni yokushiswa kwesikhumba, i-UVB ivame ukubangela2–10%kokukhishwa kwe-UV.
3. I-UVA vs. I-UVB Emibhedeni Yokushiswa Kwesikhumba
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I-UVA:Ukushintsha kombala okusheshayo, kuyanyamalala ngokushesha ngaphandle kokukhuthazwa yi-UVB.
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I-UVB:Ukukhula kombala kuhamba kancane, kodwa umbala we-tan uhlala isikhathi eside.
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Inhlanganisela:Imibhede yokushiswa kwesikhumba isebenzisa kokubili ukuletha umphumela wokushiswa kwesikhumba osheshayo noqhubekayo.
4. Izinto Okufanele Uzicabangele Ngokuphepha
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Nciphisa isikhathi sokuchayeka ukuze ugweme ukuchayeka ngokweqile.
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Gqoka njalo izibuko zamehlo ezivikelayo ukuze uvimbele imisebe ye-UV eyingozi.
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Faka umswakama esikhumbeni ngaphambi nangemva kokushiswa kwesikhumba ukuze unciphise ukoma.
Isiphetho
Zombili imisebe ye-UVA ne-UVB zibalulekile enkambisweni yokushiswa kwesikhumba, kodwa ngayinye inezinzuzo zayo kanye nezingozi zayo. Ukuqonda okulinganiselayo kukusiza ukuthi ushiswe isikhumba ngokuphepha futhi ugcine isikhumba siphilile ngokuhamba kwesikhathi.