{"id":13856,"date":"2021-11-27T13:43:33","date_gmt":"2021-11-27T06:43:33","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=13856"},"modified":"2021-11-27T13:53:23","modified_gmt":"2021-11-27T06:53:23","slug":"tan-nhang-la-cai-gi-nhi","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/tan-nhang-la-cai-gi-nhi\/","title":{"rendered":"T\u00e0n nhang l\u00e0 c\u00e1i g\u00ec nh\u1ec9?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 2 &#8211; Arkady Leokum \u0111\u1ec3 hi\u1ec3u t\u00e0n nhang l\u00e0 c\u00e1i g\u00ec v\u00e0 n\u00f3 xu\u1ea5t hi\u1ec7n nh\u01b0 th\u1ebf n\u00e0o th\u00ec tr\u01b0\u1edbc h\u1ebft ta ph\u1ea3i hi\u1ec3u c\u00e1i g\u00ec t\u1ea1o ra m\u00e0u s\u1eafc tr\u00ean l\u00e0n da con ng\u01b0\u1eddi.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1eafc t\u1ed1 quan tr\u1ecdng nh\u1ea5t quy\u1ebft \u0111\u1ecbnh m\u00e0u da con ng\u01b0\u1eddi l\u00e0 ch\u1ea5t melanin. Ta c\u00f3 th\u1ec3 n\u00f3i m\u00e0u da c\u1ee7a c\u00e1c ch\u1ee7ng t\u1ed9c kh\u00e1c nhau ho\u00e0n to\u00e0n t\u00f9y thu\u1ed9c v\u00e0o s\u1ed1 l\u01b0\u1ee3ng melanin c\u00f3 trong da.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u1ede \u0111\u1eddi s\u1ed1ng c\u1ee7a c\u00e1c lo\u00e0i sinh v\u1eadt h\u1ea1 \u0111\u1eb3ng (c\u1ea5p th\u1ea5p), ch\u00ednh ch\u1ea5t melanin \u0111\u00e3 l\u00e0m cho c\u00e1 v\u00e0 th\u1eb1n l\u1eb1n c\u00f3 th\u1ec3 thay \u0111\u1ed5i \u0111\u01b0\u1ee3c m\u00e0u s\u1eafc c\u1ee7a ch\u00fang. \u1ede lo\u00e0i ng\u01b0\u1eddi, ngo\u00e0i ch\u1ee9c n\u0103ng ch\u00ednh t\u1ea1o n\u00ean \u201cm\u00e0u\u201d c\u1ee7a l\u00e0n da, ch\u1ea5t melanin c\u00f2n b\u1ea3o v\u1ec7 l\u00e0n da ch\u1ed1ng l\u1ea1i nh\u1eefng t\u00e1c \u0111\u1ed9ng c\u00f3 h\u1ea1i khi v\u00ec l\u00fd do n\u00e0y l\u00fd do kia ta ph\u1ea3i d\u00e3i d\u1ea7u ngo\u00e0i n\u1eafng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ea5t melanin \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t ra do m\u1ed9t m\u1ea1ng l\u01b0\u1edbi t\u1ebf b\u00e0o \u0111\u1eb7c bi\u1ec7t n\u1eb1m r\u1ea3i r\u00e1c kh\u1eafp m\u1eb7t d\u01b0\u1edbi c\u1ee7a bi\u1ec3u b\u00ec, l\u1edbp m\u1ecfng ph\u00eda ngo\u00e0i c\u00f9ng c\u1ee7a da. Nh\u1eefng t\u1ebf b\u00e0o \u0111\u00f3 t\u00ean l\u00e0 \u201cmelan- nocytes\u201d (h\u1eafc t\u1ed1).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0111\u1ebfn \u0111\u00e2y, ta c\u00f3 th\u1ec3 h\u1ecfi: v\u1eady th\u00ec t\u00e0n nhang l\u00e0 g\u00ec?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00e0n nhang ch\u1ec9 l\u00e0 nh\u1eefng \u201cch\u00f9m\u201d c\u00e1c \u0111i\u1ec3m h\u1eafc t\u1ed1. \u0111\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao t\u00e0n nhang c\u00f3 m\u00e0u n\u00e2u \u0111en, m\u00e0u c\u1ee7a s\u1eafc t\u1ed1 melanin. Nh\u01b0ng, c\u00f2n v\u1ea5n \u0111\u1ec1 n\u00e0y n\u1eefa. T\u1ea1i sao c\u00f3 ng\u01b0\u1eddi c\u00f3 t\u00e0n nhang, c\u00f3 ng\u01b0\u1eddi kh\u00f4ng? L\u00fd do di truy\u1ec1n. Ch\u00ednh cha m\u1eb9 \u201cquy\u1ebft \u0111\u1ecbnh\u201d con c\u00e1i c\u00f3 hay kh\u00f4ng c\u00f3 t\u00e0n nhang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00e0u s\u1eafc c\u1ee7a t\u00e0n nhang c\u00f3 th\u1ec3 thay \u0111\u1ed5i t\u1eeb m\u00e0u n\u00e2u nh\u1ea1t \u0111\u1ebfn m\u00e0u n\u00e2u \u0111\u1eadm t\u00f9y \u1edf ch\u1ed7 ng\u01b0\u1eddi \u0111\u00f3 \u1edf ngo\u00e0i tr\u1eddi nhi\u1ec1u hay \u00edt. Kh\u00f4ng nh\u1eefng \u00e1nh n\u1eafng l\u00e0m cho t\u00e0n nhang \u0111\u1eadm m\u00e0u th\u00eam m\u00e0 c\u00f2n l\u00e0m xu\u1ea5t hi\u1ec7n th\u00eam nh\u1eefng t\u00e0n nhang m\u1edbi.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 2 &#8211; Arkady Leokum \u0111\u1ec3 hi\u1ec3u t\u00e0n nhang l\u00e0 c\u00e1i g\u00ec v\u00e0 n\u00f3 xu\u1ea5t hi\u1ec7n nh\u01b0 th\u1ebf n\u00e0o th\u00ec tr\u01b0\u1edbc h\u1ebft ta ph\u1ea3i hi\u1ec3u c\u00e1i g\u00ec t\u1ea1o ra m\u00e0u s\u1eafc tr\u00ean l\u00e0n da con ng\u01b0\u1eddi. S\u1eafc t\u1ed1 quan tr\u1ecdng nh\u1ea5t quy\u1ebft \u0111\u1ecbnh m\u00e0u [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15],"tags":[],"class_list":["post-13856","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/13856","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=13856"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/13856\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=13856"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=13856"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=13856"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}