Unyango olukhaphukhaphu
Ingasetyenziswa nangaliphi na ixesha, kuquka nasebusuku.
Ingasetyenziswa ngaphakathi endlwini, ngasese.
Iindleko zokuqala kunye neendleko zombane
Ukukhanya okunempilo
Ubunzulu bunokwahluka
Akukho kukhanya kwe-UV okuyingozi
Akukho vithamini D
Kusenokwenzeka ukuba iphucule imveliso yamandla
Inciphisa iintlungu kakhulu
Ayibangeli ukuba ilanga litshone kakhulu
UKUKHANYA KWELANGA KWENDALO
Ayifumaneki rhoqo (imozulu, ubusuku, njl.njl.)
Ifumaneka ngaphandle kuphela
Ngokwendalo, akukho ndleko
Ukukhanya okunempilo nokungaphilileyo
Ubunzulu abunakwahluka
Ukukhanya kwe-UV kunokubangela umonakalo kulusu njl.
Inceda ekuvelisweni kwevithamini D
Yehlisa iintlungu ngokulinganisela
Kukhokelela ekukhanyeni kwelanga
Unyango lokukhanya okubomvu sisixhobo esinamandla nesisebenziseka ngeendlela ezininzi, kodwa ngaba kungcono kunokuphuma nje uye elangeni?
Ukuba uhlala kwindawo enamafu, esemantla, ngaphandle kokufikelela elangeni rhoqo, ngoko unyango lokukhanya okubomvu alunamsebenzi – unyango lokukhanya okubomvu lunokulungisa ubungakanani obuncinci bokukhanya kwendalo okufumanekayo. Kwabo bahlala kwiindawo ezishushu okanye kwezinye iindawo ezinokufikelela kwelanga elinamandla phantse yonke imihla, impendulo iyinkimbinkimbi ngakumbi.
Umahluko ophambili phakathi kokukhanya kwelanga kunye nokukhanya okubomvu
Ukukhanya kwelanga kuqulathe uluhlu olubanzi lokukhanya, ukusuka kukukhanya kwe-ultraviolet ukuya kwi-infrared ekufutshane.
Kwi-sunscreen spectrum kukho amaza aphilileyo e-red kunye ne-infrared (aphucula ukuveliswa kwamandla) kunye nokukhanya kwe-UVb (okukhuthaza ukuveliswa kwe-vitamin D). Nangona kunjalo, kukho amaza e-sunscreen anobungozi xa egqithisile, njenge-blue kunye ne-violet (enciphisa ukuveliswa kwamandla kwaye yonakalisa amehlo) kunye ne-UVa (ebangela ukutsha kwelanga/ukutshiswa lilanga kunye nokutsha kwe-photoaging/umhlaza). Le spectrum ibanzi inokuba yimfuneko ekukhuleni kwezityalo, i-photosynthesis kunye nemiphumo eyahlukeneyo kwi-pigment kwiintlobo ezahlukeneyo, kodwa ayiluncedo konke konke ebantwini nakwizilwanyana ezanyisayo ngokubanzi. Yiyo le nto kufuneka i-sunblock kunye ne-SPF sunscreens xa ilanga linamandla.
Ukukhanya okubomvu kuluhlu oluncinci, oluzimeleyo, oluqala kwi-600-700nm - inxalenye encinci yelanga. I-infrared esebenzayo ngokwebhayoloji isukela kwi-700-1000nm. Ngoko ke ubude be-wavelengths bokukhanya obukhuthaza imveliso yamandla buphakathi kwe-600 kunye ne-1000nm. La ma-wavelengths athile obomvu kunye ne-infrared anemiphumo emihle kuphela ngaphandle kwemiphumo emibi eyaziwayo okanye izinto eziyingozi - okwenza unyango lokukhanya okubomvu lube luhlobo lonyango olungenaxhala xa kuthelekiswa nokukhanya kwelanga. Akukho creams ze-SPF okanye iimpahla zokuzikhusela ezifunekayo.
Isishwankathelo
Eyona meko ilungileyo kukuba nokufikelela kwilanga lendalo kunye nonyango oluthile lokukhanya okubomvu. Fumana ukukhanya kwelanga ukuba unako, uze usebenzise ukukhanya okubomvu emva koko.
Ukukhanya okubomvu kuhlolisisiwe malunga nokutsha kwelanga kunye nokukhawulezisa ukuphiliswa komonakalo wemitha ye-UV. Oko kuthetha ukuba ukukhanya okubomvu kunefuthe elikhuselayo kwingozi enokubakho yelanga. Nangona kunjalo, ukukhanya okubomvu kodwa akuyi kukhuthaza ukuveliswa kwevithamini D eluswini, nto leyo oyifunayo ukuze kukhanye ilanga.
Ukufumana ukukhanya okuphakathi elangeni ukuze kuveliswe i-vitamin D, kunye nonyango lokukhanya okubomvu ngaloo mini inye ukuze kuveliswe amandla eeseli mhlawumbi yeyona ndlela ikhuselayo.