{"id":28292,"date":"2019-04-19T07:14:00","date_gmt":"2019-04-19T00:14:00","guid":{"rendered":"https:\/\/ttud.com.vn\/?p=28292"},"modified":"2021-10-02T22:16:15","modified_gmt":"2021-10-02T15:16:15","slug":"cac-nha-khoa-hoc-ngan-nuoc-sieu-lanh-khong-bi-dong-bang","status":"publish","type":"post","link":"https:\/\/casta.ttud.com.vn\/index.php\/cac-nha-khoa-hoc-ngan-nuoc-sieu-lanh-khong-bi-dong-bang\/","title":{"rendered":"C\u00e1c nh\u00e0 khoa h\u1ecdc ng\u0103n n\u01b0\u1edbc si\u00eau l\u1ea1nh kh\u00f4ng b\u1ecb \u0111\u00f3ng b\u0103ng"},"content":{"rendered":"\n

C\u00e1c nh\u00e0 khoa h\u1ecdc t\u1ea1i tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc Zurich \u0111\u00e3 ph\u00e1t hi\u1ec7n ra m\u1ed9t c\u00e1ch \u0111\u1ec3 gi\u1eef cho n\u01b0\u1edbc kh\u00f4ng b\u1ecb \u0111\u00f3ng b\u0103ng, ngay c\u1ea3 \u1edf nhi\u1ec7t \u0111\u1ed9 c\u1ef1c l\u1ea1nh.<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

Khi n\u01b0\u1edbc \u0111\u00f3ng b\u0103ng, c\u00e1c ph\u00e2n t\u1eed n\u01b0\u1edbc s\u1eafp x\u1ebfp th\u00e0nh m\u1ed9t m\u00f4 h\u00ecnh m\u1ea1ng tinh th\u1ec3 \u0111\u1ec3 t\u1ea1o th\u00e0nh c\u00e1c tinh th\u1ec3 b\u0103ng. C\u00e1c ph\u00e2n t\u1eed n\u01b0\u1edbc l\u1ecfng kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp m\u1ed9t c\u00e1ch c\u00f3 t\u1ed5 ch\u1ee9c, tr\u00f4i n\u1ed5i t\u1ef1 do, cho ph\u00e9p n\u01b0\u1edbc ch\u1ea3y.<\/p>\n\n\n\n

Trong ph\u00f2ng th\u00ed nghi\u1ec7m, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u \u0111\u00e3 duy tr\u00ec n\u01b0\u1edbc si\u00eau l\u1ea1nh \u1edf d\u1ea1ng l\u1ecfng b\u1eb1ng c\u00e1ch gi\u1eef n\u00f3 b\u00ean trong m\u1ed9t lo\u1ea1i lipit t\u1ed5ng h\u1ee3p m\u1edbi. Lipit l\u00e0 ph\u00e2n t\u1eed ch\u1ea5t b\u00e9o. Trong nghi\u00ean c\u1ee9u, c\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 t\u1ea1o ra m\u1ed9t ph\u00e2n t\u1eed ch\u1ea5t b\u00e9o t\u1ed5ng h\u1ee3p \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 mesophase lipit. C\u00e1c lipit n\u00e0y t\u1ef1 l\u1eafp r\u00e1p t\u1ea1o th\u00e0nh c\u00e1c m\u00e0ng t\u01b0\u01a1ng t\u1ef1 nh\u01b0 c\u00e1c ph\u00e2n t\u1eed ch\u1ea5t b\u00e9o t\u1ef1 nhi\u00ean v\u1ec1 h\u00ecnh d\u1ea1ng v\u00e0 ho\u1ea1t \u0111\u1ed9ng. Khi c\u00e1c m\u00e0ng k\u1ebft l\u1ea1i, ch\u00fang t\u1ea1o th\u00e0nh c\u00e1c r\u00e3nh li\u00ean k\u1ebft c\u00f3 k\u00edch th\u01b0\u1edbc ch\u01b0a \u0111\u1ebfn 1 nanomet. H\u00ecnh d\u1ea1ng c\u1ee7a t\u1eadp h\u1ee3p m\u00e0ng ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec7t \u0111\u1ed9 v\u00e0 h\u00e0m l\u01b0\u1ee3ng n\u01b0\u1edbc.<\/p>\n\n\n\n

Trong th\u00ed nghi\u1ec7m, c\u00e1c nh\u00e0 khoa h\u1ecdc x\u00e1c \u0111\u1ecbnh n\u01b0\u1edbc b\u1ecb m\u1eafc k\u1eb9t b\u00ean trong c\u00e1c r\u00e3nh nh\u1ecf c\u1ee7a m\u00e0ng kh\u00f4ng th\u1ec3 \u0111\u00f3ng b\u0103ng, ngay c\u1ea3 \u1edf m\u1ee9c d\u01b0\u1edbi 0 \u0111\u1ed9. Trong m\u1ed9t th\u1eed nghi\u1ec7m, nh\u00f3m nghi\u00ean c\u1ee9u \u0111\u00e3 s\u1eed d\u1ee5ng heli l\u1ecfng \u0111\u1ec3 l\u00e0m m\u00e1t mesophase lipit \u0111\u01b0\u1ee3c bi\u1ebfn \u0111\u1ed5i b\u1eb1ng monoacylglycerol xu\u1ed1ng m\u1ee9c -263 \u0111\u1ed9 C – c\u00e1ch 10 \u0111\u1ed9 so v\u1edbi \u0111\u1ed9 kh\u00f4ng tuy\u1ec7t \u0111\u1ed1i. \u1ede nhi\u1ec7t \u0111\u1ed9 d\u01b0\u1edbi 0 \u0111\u1ed9 C, n\u01b0\u1edbc chuy\u1ec3n sang d\u1ea1ng “th\u1ee7y tinh” nh\u01b0ng kh\u00f4ng \u0111\u00f3ng b\u0103ng. H\u00ecnh d\u1ea1ng v\u00e0 k\u00edch th\u01b0\u1edbc c\u1ee7a c\u00e1c r\u00e3nh \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh b\u1edfi c\u00e1c lipit t\u1ef1 l\u1eafp r\u00e1p, ph\u1ee5 thu\u1ed9c v\u00e0o h\u00e0m l\u01b0\u1ee3ng n\u01b0\u1edbc, n\u00ean r\u1ea5t kh\u00f3 ki\u1ec3m so\u00e1t.<\/p>\n\n\n\n

“Y\u1ebfu t\u1ed1 g\u00e2y kh\u00f3 kh\u0103n cho vi\u1ec7c ph\u00e1t tri\u1ec3n c\u00e1c lipit n\u00e0y l\u00e0 kh\u1ea3 n\u0103ng t\u1ed5ng h\u1ee3p v\u00e0 tinh ch\u1ebf ch\u00fang<\/em>“, Ehud Landau, gi\u00e1o s\u01b0 h\u00f3a h\u1ecdc t\u1ea1i \u0110\u1ea1i h\u1ecdc Zurich v\u00e0 l\u00e0 \u0111\u1ed3ng t\u00e1c gi\u1ea3 nghi\u00ean c\u1ee9u n\u00f3i.<\/p>\n\n\n\n

C\u00e1c ph\u00e2n t\u1eed ch\u1ea5t b\u00e9o c\u00f3 m\u1ed9t th\u00e0nh ph\u1ea7n k\u1ef5 n\u01b0\u1edbc v\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n h\u00fat n\u01b0\u1edbc. \u0110\u1ec3 t\u1ea1o ra l\u1edbp lipit m\u1edbi cho c\u00e1c th\u00ed nghi\u1ec7m, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u \u0111\u00e3 m\u00f4 h\u00ecnh h\u00f3a c\u00e1c ph\u00e2n t\u1eed ch\u1ea5t b\u00e9o t\u1ed5ng h\u1ee3p sau khi c\u00e1c m\u00e0ng vi khu\u1ea9n c\u00f3 th\u1ec3 t\u1ed3n t\u1ea1i \u1edf nhi\u1ec7t \u0111\u1ed9 c\u1ef1c l\u1ea1nh.<\/p>\n\n\n\n

“\u0110i\u1ec3m m\u1edbi c\u1ee7a lo\u1ea1i lipit do ch\u00fang t\u00f4i t\u1ea1o ra l\u00e0 vi\u1ec7c \u0111\u01b0a ba v\u00f2ng c\u00f3 \u0111\u1ed9 bi\u1ebfn d\u1ea1ng cao v\u00e0o c\u00e1c v\u1ecb tr\u00ed c\u1ee5 th\u1ec3 trong c\u00e1c ph\u1ea7n k\u1ef5 n\u01b0\u1edbc c\u1ee7a c\u00e1c ph\u00e2n t\u1eed<\/em>“, GS. Landau n\u00f3i. “Nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0y cho ph\u00e9p l\u00e0m cong \u1edf m\u1ee9c c\u1ea7n thi\u1ebft c\u00e1c r\u00e3nh d\u1eabn n\u01b0\u1edbc nh\u1ecf v\u00e0 ng\u0103n ch\u1eb7n c\u00e1c lipit k\u1ebft tinh<\/em>“.<\/p>\n\n\n\n

C\u00e1c t\u00e1c gi\u1ea3 hy v\u1ecdng k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u m\u1edbi s\u1ebd \u0111\u01b0\u1ee3c c\u00e1c nh\u00e0 khoa h\u1ecdc kh\u00e1c s\u1eed d\u1ee5ng. C\u00e1c lipit c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e2n l\u1eadp, b\u1ea3o qu\u1ea3n v\u00e0 nghi\u00ean c\u1ee9u c\u00e1c ph\u00e2n t\u1eed sinh h\u1ecdc c\u1ee1 l\u1edbn nh\u01b0 protein trong m\u00f4i tr\u01b0\u1eddng gi\u1ed1ng nh\u01b0 m\u00e0ng.<\/p>\n\n\n\n

GS. Raffaele Mezzenga, \u0111\u1ed3ng t\u00e1c gi\u1ea3 nghi\u00ean c\u1ee9u cho r\u1eb1ng: “Nghi\u00ean c\u1ee9u c\u1ee7a ch\u00fang t\u00f4i s\u1ebd m\u1edf \u0111\u01b0\u1eddng cho c\u00e1c d\u1ef1 \u00e1n x\u00e1c \u0111\u1ecbnh c\u00e1ch protein \u0111\u01b0\u1ee3c b\u1ea3o qu\u1ea3n \u1edf d\u1ea1ng ban \u0111\u1ea7u v\u00e0 t\u01b0\u01a1ng t\u00e1c v\u1edbi m\u00e0ng lipit \u1edf nhi\u1ec7t \u0111\u1ed9 r\u1ea5t th\u1ea5p<\/em>“.<\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00e1c nh\u00e0 khoa h\u1ecdc t\u1ea1i tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc Zurich \u0111\u00e3 ph\u00e1t hi\u1ec7n ra m\u1ed9t c\u00e1ch \u0111\u1ec3 gi\u1eef cho n\u01b0\u1edbc kh\u00f4ng b\u1ecb \u0111\u00f3ng b\u0103ng, ngay c\u1ea3 \u1edf nhi\u1ec7t \u0111\u1ed9 c\u1ef1c l\u1ea1nh. Khi n\u01b0\u1edbc \u0111\u00f3ng b\u0103ng, c\u00e1c ph\u00e2n t\u1eed n\u01b0\u1edbc s\u1eafp x\u1ebfp th\u00e0nh m\u1ed9t m\u00f4 h\u00ecnh m\u1ea1ng tinh th\u1ec3 \u0111\u1ec3 t\u1ea1o th\u00e0nh c\u00e1c tinh th\u1ec3 b\u0103ng. C\u00e1c […]<\/p>\n","protected":false},"author":25,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[],"class_list":["post-28292","post","type-post","status-publish","format-standard","hentry","category-tin-tuc"],"_links":{"self":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/28292","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/users\/25"}],"replies":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/comments?post=28292"}],"version-history":[{"count":1,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/28292\/revisions"}],"predecessor-version":[{"id":28293,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/28292\/revisions\/28293"}],"wp:attachment":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/media?parent=28292"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/categories?post=28292"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/tags?post=28292"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}