I-sunscreen kanye nezinye izindlela zemvelo

Imisebe ye-UV ibhekene nokuhlanganiswa kwe-Vitamin D esikhunjeni, ngaphezu kwalokho, ukushiswa yilanga kuphakamisa isimo sethu semizwa. Kepha vele eminyakeni engu-1930er eyodwa ibiyazi nobungozi bemisebe yelanga eyeqile. I-1933 isivele ifakele ilungelo lobunikazi ku-Drugofa GmbH, inkampani esekela iBayer, ngomkhiqizo obizwa ngeDelal. Isihlungi sokuqala selanga elinomhluzi wokuvikela i-UV, i-sunscreen yokuqala, sazalwa. Izidumbu, izifutho noma uwoyela obekuhlikihlwe elangeni phakathi kweminyaka ye-1980 kutholwe ngokubaluleka. Ngokushesha wonke umuntu wakhuluma ngomgodi we-ozone kanye nesici sokuvikela ilanga emikhiqizweni ehlukahlukene savuka ngokushesha.

Imikhiqizo enophawu lwe-UVA iqinisekisa ukuthi isici sokuvikela se-UVA okungenani ingxenye yesithathu yento yokuvikela i-UVB. Isici sokuvikelwa yilanga sisho okungukuvikela imisebe ye-UVB kuphela, imisebe ye-UVA kaningi ayinakwa kangako. Isibonakaliso se-UVA siyisiqondisi esihle lapho ukhetha ilanga elifanele ilanga.

Okungabonakali: Imisebe ye-UV

Ngaphezu kokukhanya kwayo okubonakalayo, ukukhanya kwelanga kuqukethe imisebe ye-UVA ende, nemisebe ye-UVB emfushane, engafiki emhlabeni ngenxa yesendlalelo se-ozone. Imisebe ye-UV inesibopho sokwenza isikhumba sibe nsundu. Le nqubo ukusabela okuvikelayo. I-epidermis iqukethe amaseli akha imibala yengulube, ama-melanocyte, umbala wawo o-brown melanin ovikela isikhumba emisebeni yelanga. Uma imisebe ye-UVB eningi ishaya isikhumba esingavikelekile, kukhona impendulo yokuvuvukala ehambelana nokushiswa, ukushiswa yilanga. Kodwa imisebe ye-UVA ye-wave ende ayiyona indlela engenabungozi. Zingena zijule esikhunjeni bese zilimaza i-collagen yesikhumba, okuholela ekunciphiseni kokuqina kwesikhumba futhi kanjalo nasekugugeni ngaphambi kwesikhathi nemibimbi.

Izinganekwane ze-UV mayelana nokukhanya kwelanga

Ukusebenza isikhathi eside kwe-sunscreen kwandisa isikhathi sokuvikelwa?
Cha, ukuvikelwa akwelulwa, kepha kugcinwe. Isibonelo, noma ngubani othola isikhumba esibomvu elangeni engavikelekile ngemuva kwemizuzu eyishumi angahlala elangeni cishe amahora amahlanu nge-30 yokuvikela ilanga.

Ngabe amaBlondes adinga into ephezulu yokuvikelwa yilanga kunezinwele ezimnyama?
Cha, ngoba akuwona umbala wezinwele obalulekile, kodwa uhlobo lwesikhumba.

Lapho isikhumba seluvaliwe, awusashiswa yilanga?
Ukuxilonga kusabalulekile. Isikhumba asisejwayele elangeni unomphela futhi singakhohlwa ukulimala kwelanga.

Ngokubomvu kokuqala kwanele ukuhamba amahora ambalwa emthunzini? Cha, sekuphuze kakhulu. Ukushiswa yilanga kufinyelela inani eliphakeme ngemuva kwamahora we-24.

I-solarium isiza ukuvikela ukushiswa yilanga? Cha, ama-sunbeds asebenza ngokukhanya kwe-UVA. Ngombono wezokwelapha, ukubonakaliswa okwengeziwe kwesikhumba ekukhanyisweni kwe-UV kufanele kugwenywe. Lokhu kuholela ukuguga kwesikhumba ngaphambi kwesikhathi. Ngesikhathi esifanayo, ubungozi bokuthola umdlavuza wesikhumba buyathuthukiswa.

Isikrini selanga nangemva kwelanga

Okhilimu abaningi belanga bathembela kwinhlanganisela yokuhlunga okungokomzimba nokwamakhemikhali. Ukuhlunga kwe-titanium oxide noma i-zinc oxide ebonakalayo futhi kuhlakaze ukukhanya kwe-UV okungenayo njengezibuko ezincane. Ukuhlunga ngamakhemikhali kuguqula imisebe ye-UV eyingozi ibe amandla angenabungozi, okusho ukukhanya noma ukushisa okungenabungozi. Kumikhiqizo ye-After Sun, ama-ejenti atholisa isikhumba njengama-algae vera asetshenziselwa ukupholisa futhi ukuthambisa isikhumba ngemuva kokushiswa yilanga. Ngemuva kwe-20 yemizuzu ye-UV, ukulimala kwezinto ezibonakalayo zamaseli wesikhumba kwenzeka. Eminye imikhiqizo yasemuva kwelanga iqukethe i-enzyme Photolyase, esekela indlela yokulungisa isikhumba sayo. Isikhathi esithile manje le ndlela ibilokhu ibizwa kumikhiqizo ebizwa ngokuthi yele-over-over. Isibonelo, okhilimu wosuku noma abazisebenzelayo manje banezihlungi ze-UVA ne-UVB.

Isikrini selanga samaminerali (obizwa nangokuthi i-sunscreen ebonakalayo) kuyindlela engokwemvelo yokwakheka kokukhanya kwelanga nezifafaza futhi inikela ngokuvikelwa okusebenzayo emisebeni ye-UV. Ngokuphikisana nama-sunscreens amakhemikhali, imikhiqizo yamaminerali isebenza ngomgomo ohlukile: amaminerali emvelo akhona esikhunjeni futhi akhombisa imisebe ye-UV engenayo njengesibuko sokukhanya. Lezihlungi zemvelo ze-sunscreen zisebenza ngokushesha ngemuva kwesicelo futhi azisebenzi nge-hormone. Imibala yemvelo yamaminerali ku-emulsion iyabonakala futhi: Ngokukhanya okukhanyayo kuvela njenge-shimmer emhlophe, isikhumba sitholwa njengombala omhlophe nomdlwenguli. Ukujwayela.

Engxoxweni noDkt. UDagmar Millesi, uchwepheshe kwezokuhlinza ngopulasitiki nobuhle kokhilimu belanga, ukushiswa yilanga & Co.

Ilanga: Kwenzekani esikhunjeni?
UMillesi: "Ilanga likhipha imisebe ye-UV. Lokhu kuholela ekukhishweni kwezithunywa ezithile ezifana ne-histamine noma ama-interleukins esikhunjeni. Ukushiswa ngemisebe okwedlulele kubangela ukufiphala kwemithambo yegazi, ubomvu nokuvuvukala kwendawo yesikhumba ethintekile. Ukulunywa noma ukushiswa kungumphumela. Lokhu kusabela kokuvuvukala kwesikhumba kubizwa ngokuthi ukushiswa yilanga. Lapho kushiswa ilanga kakhulu, kubangela ukuqhakaza futhi kuvame ukuba nomkhuhlane, isicanucanu, ukubanda nokuhlanza. Ukushiswa yilanga ukushisa isikhumba futhi kufanele kugwenywe ngazo zonke izindleko. "

Ngabe isebenza kanjani i-sunscreen?
UMillesi: "Ama-sun okhilimu ahlunga imisebe yelanga ye-UV futhi ngaleyo ndlela enwebisa isikhumba sakho esivikela emisebeni ye-UV. Umehluko kukhona okhilimu belanga abasebenza ngokomzimba noma ngamakhemikhali. Izihlungi zamakhemikhali ze-UV zingena esikhunjeni ngemuva kokufaka bese zakha uhlobo lwefilimu yangaphakathi yokuvikela. Lokhu kuguqula imisebe ye-UV ibe ukukhanya okukhanya futhi ngenxa yalokho kube ukushisa. Okubi ukuthi le okhilimu welanga kuphela ngemuva kokuthatha cishe imizuzu ye-30, ngaphezu kwalokho, abanye abantu bayasabela kuyo. Ukuhlunga okungokoqobo akungene esikhunjeni kepha kwakha ifilimu elivikelayo ngaphandle kwesikhumba. Ngenxa yalokhu, imisebe ye-UV ivikelwe noma iboniswe. Usizo lwalezi ziphupho zelanga ukuthi zikwazi ukubekezelelwa kahle. "

Ingabe kukhona nelanga lemvelo?
UMillesi: "Ilanga lemvelo elihle kakhulu ukugwema ukuvezwa yilanga ngokuqinile. Ngakho-ke ungazivezi elangeni langemuva le-placid emini, funa izindawo ezinomthunzi futhi ugqoke izingubo nezingubo zekhanda elangeni. Futhi, amanye uwoyela angasebenza njengesibuko sokukhanya kwelanga, njengamafutha wesesame, uwoyela kakhukhunathi noma uwoyela we-jojoba. Lezi zivikelo zingamaphesenti ama-10-30 kuphela wemisebe ye-UV. Kepha umuntu akufanele akhohlwe ukuthi ukukhanya kwelanga kufeza imisebenzi ebalulekile emzimbeni womuntu. Isebenzisa ukukhiqizwa kwe-Vitamin D, inomthelela obalulekile ezintweni zesithunywa, njenge-serotonin, futhi futhi ingathinta nama-hormone kahle. "

Photo / Video: Ugogo.