amakuru

Kurinda izuba ni ikintu cy'ingenzi ku bagore ba none mu mwaka wose. Kurinda izuba ntibishobora kugabanya gusa kwangirika kw'imirasire ya ultraviolet ku ruhu, ahubwo binarinda gusaza kw'uruhu n'indwara zijyana nabyo. Ibikoresho bikingira izuba akenshi bigizwe n'ubwoko bwa fiziki, imiti, cyangwa uruvange rw'ubwoko bwombi kandi bigatanga uburinzi bwagutse bwa UV. Kugira ngo bigufashe kugura neza sunscreen yabo mu gihe kizaza, uyu munsi uva mu bikoresho bivura sunscreen n'ibindi bikoresho bivura sunscreen kugira ngo usesengure ibikoresho bivura sunscreen.

Igice cy'imiti gikora

Octyl methoxycinnamate

Octyl methoxycinnamate (OMC)ni imwe mu miti ikoreshwa cyane mu gusukura izuba. Octyl methoxycinnamate (OMC) ni filter ya UVB ifite uburebure bwiza bwo kwinjiza UV bwa 280 ~ 310 nm, ifite umuvuduko mwinshi wo kwinjiza UV, umutekano mwiza, uburozi buke, kandi ishobora gushonga neza ku bikoresho by'amavuta. Izwi kandi nka octanoate na 2-ethylhexyl 4-methoxycinnamate. Iyi mvange yemejwe nk'ikintu cyo kwisiga muri Leta Zunze Ubumwe za Amerika n'Umuryango w'Ubumwe bw'u Burayi (EU) ku kigero cya 7.5-10%.

Benzophenone-3

Benzophenone-3(BP-3) ni uruhu rwo kwisiga rushobora gushonga mu mavuta, rushobora kwinjiza imirasire ya UVB na UVA ngufi. BP-3 irangirika vuba bitewe n'imirasire ya ultraviolet, ikagabanya ubushobozi bwayo kandi igatanga amoko menshi ya ogisijeni. Muri Leta Zunze Ubumwe za Amerika, ubwinshi ntarengwa bwa BP-3 mu ruhu rwo kwisiga ni 6%.

Benzophenone -4

Benzophenone-4(BP-4) ikunze gukoreshwa nk'icyuma gifata imirasire ya ultraviolet ku rugero rugera kuri 10%. BP-4, kimwe na BP-3, ni ikintu kiva muri benzophenone.

Kamphori ya 4-methylbenzyl

4-methylbenzylidene camphor (4-methylbenzylidene camphor, 4-MBC) cyangwa enzacamene ni ubwoko bwa camphor bukomoka ku bimera bikoreshwa nk'umuti utera UVB mu mavuta yo kwisiga akingira izuba n'andi mavuta yo kwisiga. Nubwo iki kinyabutabire kitemewe n'Ikigo gishinzwe ibiribwa n'imiti muri Amerika (FDA), ibindi bihugu byemera ikoreshwa ry'iki kinyabutabire kugeza kuri 4%.

4-MBC ni igice gikunda kwangirika cyane gishobora kwinjira mu ruhu kandi kikaba kiri mu ngingo z'umuntu, harimo n'ingobyi. 4-MBC igira ingaruka zo kwangirika kwa estrogen mu misemburo y'amaraso, bigira ingaruka ku murongo wa tiroyide kandi bikabuza imikorere ya AChE. Bityo rero, ubwitonzi bukubiyemo ibi bintu bugomba gukoreshwa mu kwitonda.

Kamphori ya 3-benzal

3-benzylidene camphor (3-BC) ni ikinyabutabire gikunda kwangirika k'umunyu gifitanye isano rya bugufi na 4-MBC. Igipimo ntarengwa cyayo gikoreshwa mu bicuruzwa bisiga izuba mu Muryango w'Ubumwe bw'u Burayi ni 2%.

Kimwe na 4-MBC, 3-BC nayo ivugwaho kuba ikintu gitera estrogen kwangirika. Byongeye kandi, 3-BC byavuzwe ko igira ingaruka ku mikorere ya CNS. Nanone, izuba ririmo ibi bintu rigomba gukoreshwa witonze.

Oktilene

Octocrtriene (OC) ni ester iri mu itsinda rya cinnamate ryinjiza imirasire ya UVB na UVA, aho ingana na 10% mu mavuta yo kwisiga arinda izuba n'amavuta yo kwisiga ya buri munsi.

Igice gikora ku mubiri

Ibintu bikora ku mubiri bikoreshwa mu miti irinda izuba akenshi ni dioxyde titanium (TiO2) na zinc oxide (ZnO), kandi ubusanzwe ingano yabyo iba iri hagati ya 5-10%, ahanini binyuze mu kugaragaza cyangwa gukwirakwiza imirasire ya ultraviolet (UVR) kugira ngo igere ku ntego yo gukoresha imiti irinda izuba.

Dioxyde ya titanium

Dioxyde ya titanium ni imyunyu ngugu y'umweru igizwe na titanium na ogisijeni. Dioxyde ya titanium ikoreshwa cyane mu biribwa no mu mavuta yo kwisiga, cyane cyane kubera umweru wayo n'ubushobozi bw'imiti irinda izuba kuva ku rumuri rw'izuba.

Oxyde ya zinki

Okiside ya Zinc ni ifu yera ifite ubushobozi bwo kurinda no gusukura. Ni kandi umuti urinda izuba uturuka ku mirasire ya UV ugaragaza imirasire ya UVA na UVB. Byongeye kandi, zinc ifite ubushobozi bwo kurwanya ububyimbirwe, gufunga no kumisha. Okiside ya Zinc, umuti urinda izuba uzwiho umutekano kandi ukora neza n’Ikigo gishinzwe ibiribwa n’imiti muri Amerika, ni umwe muri yo.

Nyuma y'ibisobanuro by'iyi nkuru, ese wasobanukiwe neza ibintu bikora mu mavuta yo kwisiga akingira izuba? Nyamuneka mbwira niba ufite ikindi kibazo.