litaba

Tšireletso ea letsatsi ke ntho e hlokahalang bakeng sa basali ba kajeno ho pholletsa le selemo. Tšireletso ea letsatsi e ke ke ea fokotsa feela tšenyo ea mahlaseli a ultraviolet letlalong, empa hape e qoba ho tsofala ha letlalo le mafu a amanang le letlalo. Lisebelisoa tse sireletsang letsatsi hangata li entsoe ka 'mele, lik'hemik'hale, kapa motsoako oa mefuta e' meli 'me li fana ka tšireletso e pharaletseng ea UV. E le ho u thusa ho molemo ho reka setlolo sa bona se sireletsang letsatsi nakong e tlang, kajeno nka u tsoa ho metsoako ea lik'hemik'hale e sebetsang le metsoako e sebetsang ea 'mele ho hlahloba metsoako e sebetsang ea setlolo se sireletsang letsatsi.

Karolo e sebetsang ea lik'hemik'hale

Octyl methoxycinnamate

Octyl methoxycinnamate (OMC)ke e 'ngoe ea lintho tse sebelisoang haholo ho sireletsa letsatsi. Octyl methoxycinnamate (OMC) ke filthara ea UVB e nang le curve e ntle ea UV ea 280 ~ 310 nm, sekhahla se phahameng sa ho monya, polokeho e ntle, chefo e fokolang, le ho qhibiliha hamonate linthong tse tala tse mafura. E boetse e tsejoa e le octanoate le 2-ethylhexyl 4-methoxycinnamate. Motsoako ona o amohetsoe e le motsoako oa litlolo United States le European Union (EU) maemong a 7.5-10%.

Benzophenone-3

Benzophenone-3(BP-3) ke sekoaelo sa letsatsi se qhibilihang ka har'a oli se monyang mahlaseli a mabeli a UVB le a makhutšoanyane a UVA. BP-3 e kenngoa ka potlako tlas'a mahlaseli a ultraviolet, ho fokotsa ts'ebetso ea eona le ho hlahisa mefuta e mengata ea oksijene e sebetsang. United States, tekanyo e phahameng e lumelletsoeng ea BP-3 ka setlolo se sireletsang letsatsi ke 6%.

Benzophenone -4

Benzophenone-4(BP-4) hangata e sebelisoa e le sehlaseli sa ultraviolet ha se fihla ho 10%. BP-4, joalo ka BP-3, ke motsoako oa benzophenone.

4-methylbenzyl camphor

4-methylbenzylidene camphor (4-methylbenzylidene camphor, 4-MBC) kapa enzacamene ke organic camphor derivative e sebelisoang e le sehlaseli sa UVB se sireletsang letsatsi le litlolo tse ling. Le hoja motsoako o sa amoheloe ke US Food and Drug Administration (FDA), linaha tse ling li lumella tšebeliso ea motsoako ka likhahla ho fihlela ho 4%.

4-MBC ke karolo e nang le lipophilic e ngata e ka monngoang ka letlalo 'me e teng ka har'a lisele tsa motho, ho kenyeletsa le placenta. 4-MBC e na le phello ea tšitiso ea estrogen endocrine, e amang axis ea qoqotho le ho thibela mosebetsi oa AChE. Ka hona, setlolo se sireletsang letsatsi se nang le metsoako ena se lokela ho sebelisoa ka hloko.

3-benzal camphor

3-benzylidene camphor (3-BC) ke motsoako oa lipophilic o amanang haufi-ufi le 4-MBC. Boholo ba eona bo sebelisoang lihlahisoa tse sireletsang letsatsi ho European Union ke 2%.

E ts'oanang le 4-MBC, 3-BC e boetse e hlalosoa e le moemeli oa ho senya estrogen. Ho feta moo, 3-BC e tlalehiloe e ama CNS. Hape, setlolo se sireletsang letsatsi se nang le metsoako ena se lokela ho sebelisoa ka hloko.

Octylene

Octocrtriene (OC) ke ester ea sehlopha sa cinnamate e monyang mahlaseli a UVB le UVA, 'me e tsepamisa mohopolo ho fihla ho 10% ho litlolo tse sireletsang letsatsi le litlolo tsa letsatsi le letsatsi.

Karolo e sebetsang ya mmele

Metsoako e sebetsang ea 'mele e sebelisoang litlolong tsa letsatsi hangata ke titanium dioxide (TiO 2) le zinc oxide (ZnO), 'me likhahla tsa tsona hangata ke 5-10%, haholo-holo ka ho bonahatsa kapa ho hasanya ketsahalo ea mahlaseli a kotsi a ultraviolet (UVR) ho finyella sepheo sa letsatsi. .

Titanium dioxide

Titanium dioxide ke diminerale e tšoeu ea phofo e entsoeng ka titanium le oksijene. Titanium dioxide e sebelisoa haholo lijong le litlolong, haholo-holo ka lebaka la bosoeu ba eona le ho sebetsa hantle ha li-sunscreens tsa UV.

Zinc oxide

Zinc oxide ke phofo e tšoeu e nang le lintho tse sireletsang le tse hloekisang. Hape ke tšireletso e sireletsang khahlanong le mahlaseli a letsatsi a UVB le mahlaseli a letsatsi a UVA. Ho phaella moo, zinki e na le li-anti-inflammatory, astringent le ho omisa thepa. Zinc oxide, setlolo se sireletsang letsatsi letsatsing se tsejoang e le se sireletsehileng le se sebetsang ke US Food and Drug Administration, ke e 'ngoe ea tsona.

Ka mor'a tlhaloso ea sehlooho see, na u utloisisa hamolemo metsoako e sebetsang ea setlolo se sireletsang letlalo letsatsing? Ka kopo, ikopanye le 'na haeba u na le lipotso tse ling.