Nchekwa anyanwụ bụ ihe dị mkpa maka ụmụ nwanyị nke oge a n'afọ niile. Nchekwa anyanwụ nwere ike ọ bụghị naanị ibelata mmebi nke ụzarị ultraviolet na akpụkpọ ahụ, kamakwa zere ịka nká na ọrịa anụ ahụ metụtara ya. A na-ejikarị ihe anụ ahụ, kemịkalụ, ma ọ bụ ngwakọta nke ụdị abụọ ahụ eme ihe na-enyo enyo ma na-enye nchebe UV sara mbara. Iji nyere gị aka ịzụrụ ihe mkpuchi anwụ nke onwe ha n'ọdịnihu, taa wepụrụ gị site na ihe ndị na-emepụta ihe na-emepụta ihe na ihe ndị na-arụ ọrụ anụ ahụ iji nyochaa ihe ndị dị irè nke sunscreen.
Akụkụ kemịkalụ na-arụ ọrụ
Octyl methoxycinnamate
Octyl methoxycinnamate (OMC)bụ otu n'ime ihe ndị na-ekpuchi anya anwụ na-ejikarị eme ihe. Octyl methoxycinnamate (OMC) bụ ihe nzacha UVB nke nwere oke nnabata UV nke 280 ~ 310 nm, ọnụego nnabata dị elu, nchekwa dị mma, obere nsị, yana ezigbo solubility na akụrụngwa mmanụ. A makwaara dị ka octanoate na 2-ethylhexyl 4-methoxycinnamate. A kwadoro ogige ahụ dị ka ihe ịchọ mma na United States na European Union (EU) na ntinye nke 7.5-10%.
Benzophenone-3
Benzophenone-3(BP-3) bụ ihe mkpuchi anwụ anwụ nke na-amịkọrọ mmanụ UVB na mkpụmkpụ UVA. BP-3 na-agba ọsọ ngwa ngwa n'okpuru radieshon ultraviolet, na-ebelata ịdị irè ya ma na-emepụta nnukwu ụdị oxygen na-emeghachi omume. Na United States, ikike kacha mma nke BP-3 na mkpuchi anwụ bụ 6%.
Benzophenone -4
Benzophenone-4A na-ejikarị BP-4 eme ihe dị ka ihe na-ekpuchi ultraviolet na mkpokọta ruo 10%. BP-4, dị ka BP-3, bụ ihe nrụpụta benzophenone.
4-methylbenzyl camphor
4-methylbenzylidene camphor (4-methylbenzylidene camphor, 4-MBC) ma ọ bụ enzacamene bụ organic camphor ewepụtara na-eji dị ka UVB absorber na sunscreens na ndị ọzọ ntecha. Ọ bụ ezie na ụlọ ọrụ US Food and Drug Administration (FDA) akwadoghị ogige ahụ, mba ndị ọzọ na-ekwe ka iji onyinye ahụ na ntinye aka ruo 4%.
4-MBC bụ akụkụ lipophilic nke ukwuu nke nwere ike ịbanye na akpụkpọ ahụ ma dị na anụ ahụ mmadụ, gụnyere placenta. 4-MBC nwere mmetụta nke estrogen endocrine mmebi, na-emetụta thyroid axis na igbochi ọrụ nke AchE. Ya mere, a ga-eji nlezianya mee ihe mkpuchi anwụ nwere ihe ndị a.
3-benzal camphor
3-benzylidene camphor (3-BC) bụ ngwakọta lipophilic nwere njikọ chiri anya na 4-MBC. Ọnụ ọgụgụ kachasị elu nke a na-eji na ngwaahịa sunscreen na European Union bụ 2%.
Yiri 4-MBC, 3-BC na-akọwakwara dị ka onye na-akpaghasị estrogen. Na mgbakwunye, 3-BC ka akọọrọ na ọ na-emetụta CNS. Ọzọ, a ga-eji nlezianya mee ihe mkpuchi anwụ nke nwere ihe ndị a.
Octylene
Octocrtriene (OC) bụ ester nke otu cinnamate nke na-amịkọrọ ụzarị UVB na UVA, yana ntinye ihe ruru 10% na mkpuchi anwụ na ihe ịchọ mma kwa ụbọchị.
Akụkụ na-arụ ọrụ anụ ahụ
Ihe na-arụ ọrụ anụ ahụ a na-eji na sunscreens na-abụkarị titanium dioxide (TiO 2) na zinc oxide (ZnO), na mkpokọta ha na-abụkarị 5-10%, tumadi site na ịtụgharị uche ma ọ bụ gbasasịa ihe ahụ merenụ ultraviolet radieshon (UVR) iji nweta nzube nke sunscreen. .
Titanium dioxide
Titanium dioxide bụ ihe ịnweta ọcha na-acha ọcha nke nwere titanium na oxygen. A na-eji titanium dioxide eme ihe n'ọtụtụ ebe na nri na ihe ịchọ mma, karịsịa n'ihi ịcha ọcha ya na ịdị irè nke UV sunscreens.
Zinc oxide bụ ntụ ntụ ọcha nwere ihe nchebe na nke na-eme ka ọ dị ọcha. Ọ bụkwa ihe mkpuchi anwụ nke UV na-egosipụta ma UVA na UVB ụzarị. Na mgbakwunye, zinc nwere mgbochi mkpali, astringent na ihicha ihe. Zinc oxide, ihe mkpuchi anwụ nke ndị nlekọta nri na ọgwụ US ghọtara dị ka nchekwa ma dị irè, bụ otu n'ime ha.
Mgbe nkọwa nke isiokwu a gasịrị, ị nwere nghọta nke ọma banyere ihe ndị na-arụ ọrụ nke sunscreen? Biko kpọtụrụ m ma ọ bụrụ na ị nwere ajụjụ ọ bụla ọzọ.
Oge nzipu: Mee-30-2024