C\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 ph\u00e1t hi\u1ec7n trong c\u00e1c m\u1eabu v\u1eadt t\u1eeb ti\u1ec3u h\u00e0nh tinh Bennu n\u0103m nguy\u00ean t\u1ed1 c\u01a1 b\u1ea3n c\u1ee7a ADN v\u00e0 ARN, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 nucleobase. Nh\u1eefng ph\u00e2n t\u1eed n\u00e0y, thi\u1ebft y\u1ebfu cho s\u1ef1 s\u1ed1ng tr\u00ean Tr\u00e1i \u0110\u1ea5t, \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh t\u1ef1 nhi\u00ean trong kh\u00f4ng gian, m\u00e0 kh\u00f4ng c\u1ea7n qu\u00e1 tr\u00ecnh sinh h\u1ecdc. Ph\u00e1t hi\u1ec7n n\u00e0y c\u1ee7ng c\u1ed1 \u00fd t\u01b0\u1edfng r\u1eb1ng c\u00e1c th\u00e0nh ph\u1ea7n c\u1ea7n thi\u1ebft cho s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a s\u1ef1 s\u1ed1ng c\u00f3 th\u1ec3 \u0111\u1ebfn t\u1eeb b\u00ean ngo\u00e0i h\u00e0nh tinh c\u1ee7a ch\u00fang ta.<\/p>\n
C\u00e1c ph\u00e2n t\u00edch cho th\u1ea5y Bennu ch\u1ee9a m\u1ed9t lo\u1ea1t c\u00e1c h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 gi\u00e0u nit\u01a1, trong \u0111\u00f3 m\u1ed9t s\u1ed1 hi\u1ebfm c\u00f3 trong t\u1ef1 nhi\u00ean tr\u00ean Tr\u00e1i \u0110\u1ea5t. Trong s\u1ed1 \u0111\u00f3, c\u00f3 pyrimidine, m\u1ed9t h\u1ecd nucleobase, v\u1edbi s\u1ed1 l\u01b0\u1ee3ng nhi\u1ec1u h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi purine, m\u1ed9t h\u1ecd kh\u00e1c. S\u1ef1 ph\u00e2n b\u1ed1 \u0111\u1eb7c bi\u1ec7t n\u00e0y g\u1ee3i \u00fd r\u1eb1ng nh\u1eefng ph\u00e2n t\u1eed n\u00e0y \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh trong m\u00f4i tr\u01b0\u1eddng gi\u00e0u amoniac, nh\u01b0 nh\u1eefng m\u00f4i tr\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y \u1edf v\u00f9ng xa x\u00f4i b\u0103ng gi\u00e1 c\u1ee7a h\u1ec7 m\u1eb7t tr\u1eddi.<\/p>\n
C\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u c\u0169ng \u0111\u00e3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c l\u01b0\u1ee3ng ur\u00ea d\u1ed3i d\u00e0o, m\u1ed9t ph\u00e2n t\u1eed \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c t\u1ed5ng h\u1ee3p nucleobase. Ur\u00ea, k\u1ebft h\u1ee3p v\u1edbi amoniac, th\u00fac \u0111\u1ea9y s\u1ef1 t\u1ea1o th\u00e0nh c\u00e1c nguy\u00ean t\u1ed1 n\u00e0y trong \u0111i\u1ec1u ki\u1ec7n t\u01b0\u01a1ng t\u1ef1 nh\u01b0 tr\u00ean c\u00e1c ti\u1ec3u h\u00e0nh tinh. C\u00e1c m\u1eabu v\u1eadt t\u1eeb Bennu c\u00f2n ti\u1ebft l\u1ed9 d\u1ea5u v\u1ebft c\u1ee7a c\u00e1c h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 ph\u1ee9c t\u1ea1p kh\u00e1c, nh\u01b0 axit v\u00e0 \u0111\u01b0\u1eddng, \u0111i\u1ec1u n\u00e0y c\u1ee7ng c\u1ed1 gi\u1ea3 thuy\u1ebft v\u1ec1 m\u1ed9t h\u00f3a h\u1ecdc ti\u1ec1n sinh h\u1ecdc ho\u1ea1t \u0111\u1ed9ng trong kh\u00f4ng gian.<\/p>\n
Vi\u1ec7c nghi\u00ean c\u1ee9u nucleobase v\u00e0 s\u1ef1 ph\u00e2n b\u1ed1 c\u1ee7a ch\u00fang gi\u00fap hi\u1ec3u r\u00f5 h\u01a1n c\u00e1ch nh\u1eefng ph\u00e2n t\u1eed n\u00e0y h\u00ecnh th\u00e0nh v\u00e0 ti\u1ebfn h\u00f3a trong v\u0169 tr\u1ee5. S\u1ef1 kh\u00e1c bi\u1ec7t \u0111\u01b0\u1ee3c quan s\u00e1t gi\u1eefa Bennu v\u00e0 c\u00e1c ti\u1ec3u h\u00e0nh tinh ho\u1eb7c thi\u00ean th\u1ea1ch kh\u00e1c, nh\u01b0 Ryugu ho\u1eb7c Murchison, cho th\u1ea5y m\u1ed7i thi\u00ean th\u1ec3 s\u1edf h\u1eefu m\u1ed9t l\u1ecbch s\u1eed h\u00f3a h\u1ecdc \u0111\u1ed9c \u0111\u00e1o. Nh\u1eefng bi\u1ebfn th\u1ec3 n\u00e0y ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c \u0111i\u1ec1u ki\u1ec7n \u0111\u1ecba ph\u01b0\u01a1ng, nh\u01b0 s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a n\u01b0\u1edbc, kho\u00e1ng ch\u1ea5t ho\u1eb7c nhi\u1ec7t \u0111\u1ed9 c\u1ee5 th\u1ec3.<\/p>\n
Nh\u1eefng k\u1ebft qu\u1ea3 n\u00e0y x\u00e1c nh\u1eadn r\u1eb1ng c\u00e1c ti\u1ec3u h\u00e0nh tinh c\u00f3 th\u1ec3 \u0111\u00e3 mang \u0111\u1ebfn Tr\u00e1i \u0110\u1ea5t nguy\u00ean th\u1ee7y nh\u1eefng nguy\u00ean t\u1ed1 thi\u1ebft y\u1ebfu cho s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a s\u1ef1 s\u1ed1ng. Ch\u00fang c\u0169ng m\u1edf ra nh\u1eefng tri\u1ec3n v\u1ecdng m\u1edbi cho vi\u1ec7c t\u00ecm ki\u1ebfm d\u1ea5u v\u1ebft c\u1ee7a s\u1ef1 s\u1ed1ng \u1edf n\u01a1i kh\u00e1c trong h\u1ec7 m\u1eb7t tr\u1eddi v\u00e0 xa h\u01a1n n\u1eefa. C\u00e1c ph\u00e2n t\u1eed \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n trong Bennu ch\u1ee9ng minh r\u1eb1ng h\u00f3a h\u1ecdc ti\u1ec1n sinh h\u1ecdc c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u1ebfn m\u1ee9c \u0111\u1ed9 ph\u1ee9c t\u1ea1p cao, ngay c\u1ea3 khi kh\u00f4ng c\u00f3 s\u1ef1 s\u1ed1ng. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7t ra m\u1ed9t c\u00e2u h\u1ecfi c\u01a1 b\u1ea3n: nh\u1eefng y\u1ebfu t\u1ed1 ho\u1eb7c \u0111i\u1ec1u ki\u1ec7n b\u1ed5 sung n\u00e0o \u0111\u00e3 gi\u00fap Tr\u00e1i \u0110\u1ea5t v\u01b0\u1ee3t qua ng\u01b0\u1ee1ng \u0111\u1ec3 ti\u1ebfn \u0111\u1ebfn sinh h\u1ecdc?<\/p>\n
DOI\u00a0:<\/strong> https:\/\/doi.org\/10.1038\/s42004-026-01966-z<\/a><\/p>\n Titre\u00a0:<\/strong> Distribution of extraterrestrial nucleobases, other N-heterocycles, and their precursors in a sample from asteroid Bennu<\/p>\n Revue : <\/strong> Communications Chemistry<\/p>\n \u00c9diteur : <\/strong> Springer Science and Business Media LLC<\/p>\n Auteurs : <\/strong> Yasuhiro Oba; Toshiki Koga; Yoshinori Takano; Hiroshi Naraoka; Yuta Hirakawa; Sako Sunami; Yoshihiro Furukawa; Tomoya Yamazaki; Takuto Tomaru; Jason P. Dworkin; Daniel P. Glavin; Harold C. Connolly; Dante S. Lauretta<\/p>\n","protected":false},"excerpt":{"rendered":" C\u00e1c vi\u00ean g\u1ea1ch c\u1ee7a s\u1ef1 s\u1ed1ng c\u00f3 \u0111\u1ebfn t\u1eeb c\u00e1c ti\u1ec3u h\u00e0nh tinh? C\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 ph\u00e1t hi\u1ec7n trong c\u00e1c m\u1eabu v\u1eadt t\u1eeb ti\u1ec3u h\u00e0nh tinh Bennu n\u0103m nguy\u00ean t\u1ed1 c\u01a1 b\u1ea3n c\u1ee7a ADN v\u00e0 ARN, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 nucleobase. Nh\u1eefng ph\u00e2n t\u1eed n\u00e0y, thi\u1ebft y\u1ebfu cho s\u1ef1 s\u1ed1ng tr\u00ean Tr\u00e1i \u0110\u1ea5t, \u0111\u01b0\u1ee3c… Continue reading C\u00e1c vi\u00ean g\u1ea1ch c\u1ee7a s\u1ef1 s\u1ed1ng c\u00f3 \u0111\u1ebfn t\u1eeb c\u00e1c ti\u1ec3u h\u00e0nh tinh?<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,4,2],"tags":[],"class_list":["post-15","post","type-post","status-publish","format-standard","hentry","category-khoa-hoc-cong-nghe","category-moi-truong","category-suc-khoe","entry"],"_links":{"self":[{"href":"https:\/\/journalofspace.com\/vi\/wp-json\/wp\/v2\/posts\/15","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/journalofspace.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/journalofspace.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/journalofspace.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/journalofspace.com\/vi\/wp-json\/wp\/v2\/comments?post=15"}],"version-history":[{"count":1,"href":"https:\/\/journalofspace.com\/vi\/wp-json\/wp\/v2\/posts\/15\/revisions"}],"predecessor-version":[{"id":16,"href":"https:\/\/journalofspace.com\/vi\/wp-json\/wp\/v2\/posts\/15\/revisions\/16"}],"wp:attachment":[{"href":"https:\/\/journalofspace.com\/vi\/wp-json\/wp\/v2\/media?parent=15"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/journalofspace.com\/vi\/wp-json\/wp\/v2\/categories?post=15"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/journalofspace.com\/vi\/wp-json\/wp\/v2\/tags?post=15"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}