Mu myaka icumi ishize hakenewe uburyo bwiza bwo kurinda UVAyariyongereye vuba.
Imirasire ya UV igira ingaruka mbi, zirimo izuba, ifoto-gusaza na kanseri y'uruhu. Izi ngaruka zishobora gukumirwa gusa mukurinda imirasire ya UV yose, harimo na UVA.
Kurundi ruhande hari nuburyo bwo kugabanya ingano ya "chimique" kuruhu. Ibi bivuze ko UV abso ikora nezarbersbigomba kuboneka kubisabwa bishya byo kurinda UV yagutse.Sunsafe-BMTZIs Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine yateguwe kugirango yuzuze iki cyifuzo. Ifoto-itajegajega, irashobora gushonga amavuta, ikora neza kandi ikubiyemo urwego UVB na UVA. Mu mwaka wa 2000, abategetsi b’i Burayi bongeyeho Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine ku rutonde rwiza rw’imiti yo kwisiga UV.
•UVA:Amatsinda abiri ya ortho-OH arasabwa kugirango ingufu zikwirakwizwa neza binyuze mumiraro ya hydrogène idasanzwe. Kugirango ubone kwinjizwa cyane muri UVA, para-imyanya yimiterere yombi ya fenil igomba gusimburwa na O-alkyl, bikavamo chromophor ya bis-resorcinyl triazine.
•UVB:Itsinda risigaye rya fenyl ryometse kuri triazine riganisha kuri UVB. Birashobora kwerekanwa ko ibikorwa byinshi "byuzuye byerekana" bigerwaho hamwe na O-alkyl iherereye muri para-imyanya. Hatabayeho gushiramo insimburangingo, HPTs hafi yo kudashonga mumavuta yo kwisiga. Berekana ibintu bisanzwe biranga pigment (urugero, ingingo zo hejuru zishonga). Kugirango hongerwe imbaraga mubyiciro byamavuta, imiterere ya filteri ya UV yahinduwe uko bikwiye.
Inyungu:
Kurinda izuba ryinshi
Bigereranijwe cyane nizindi UV muyunguruzi
Imiterere ihamye
Igihe cyo kohereza: Gashyantare-18-2022