{"id":1980,"date":"2022-04-13T00:16:37","date_gmt":"2022-04-12T16:16:37","guid":{"rendered":"https:\/\/trithuctretw.com\/?p=1980"},"modified":"2022-06-06T13:20:11","modified_gmt":"2022-06-06T05:20:11","slug":"bien-doi-cau-truc-chitosan-va-ung-dung-trong-bat-khuan-tach-khuan-khang-khuan-xu-ly-moi-truong","status":"publish","type":"post","link":"https:\/\/trithuctretw.com\/en\/bien-doi-cau-truc-chitosan-va-ung-dung-trong-bat-khuan-tach-khuan-khang-khuan-xu-ly-moi-truong\/","title":{"rendered":"CHANGES IN THE STRUCTURE OF CHITOSAN AND APPLICATIONS IN BACTERIAL CATCHING, BACTERIAL SEPARATION, ANTIBACTERIAL AND ENVIRONMENTAL TREATMENT"},"content":{"rendered":"\n

Ts. V\u00f5 \u0110\u1ee9c Th\u1eafng<\/strong><\/em>
College of Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan<\/em>
Email: dtvo@mail.ntust.edu.tw; vdthangbk@gmail.com<\/p>\n\n\n\n

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Abstract<\/h2>\n\n\n\n

Chitosan, m\u1ed9t d\u1eabn xu\u1ea5t c\u1ee7a chitin, \u0111\u00e3 v\u00e0 \u0111ang nh\u1eadn \u0111\u01b0\u1ee3c s\u1ef1 quan t\u00e2m c\u1ee7a nhi\u1ec1u nh\u00e0 nghi\u00ean c\u1ee9u. B\u00ean c\u1ea1nh c\u00e1c \u0111\u1eb7c t\u00ednh t\u1ef1 nhi\u00ean c\u1ee7a chitosan, c\u00e1c d\u1eabn xu\u1ea5t d\u1ef1a tr\u00ean bi\u1ebfn \u0111\u1ed5i c\u00e1c nh\u00f3m ch\u1ee9c c\u0169ng \u0111ang \u0111\u01b0\u1ee3c ch\u00fa tr\u1ecdng. Th\u00f4ng qua ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc, c\u00e1c nh\u00f3m ch\u1ee9c amino (-NH2<\/sub>) v\u00e0 hydroxyl (-OH) c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i \u0111\u1ec3 t\u1ed5ng h\u1ee3p hydrophobically modified chitosan (HMCS) v\u00e0 carboxymethyl chitosan (CMCS). Ch\u00fang t\u00f4i \u0111\u00e3 bi\u1ebfn \u0111\u1ed5i c\u1ea5u tr\u00fac c\u1ee7a chitosan v\u00e0 nghi\u00ean c\u1ee9u c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee7a ch\u00fang trong vi\u1ec7c b\u1eaft khu\u1ea9n, t\u00e1ch khu\u1ea9n tr\u00ean d\u1ea1ng HMCS b\u1ecdt bi\u1ec3n hay g\u1eafn HMCS tr\u00ean c\u00e1c h\u1ea1t nano s\u1eaft t\u1eeb, kh\u1ea3 n\u0103ng kh\u00e1ng khu\u1ea9n c\u1ee7a b\u1ec1 m\u1eb7t \u0111\u01b0\u1ee3c ph\u1ee7 HMCS v\u00e0 kh\u1ea3 n\u0103ng h\u1ea5p ph\u1ee5 ch\u1ea5t m\u00e0u metyl da cam tr\u00ean HMCS b\u1ecdt bi\u1ec3n c\u0169ng \u0111\u00e3 \u0111\u01b0\u1ee3c kh\u1ea3o s\u00e1t. Ngo\u00e0i ra, CMCS \u0111\u00e3 \u0111\u01b0\u1ee3c g\u1eafn l\u00ean b\u1ec1 m\u1eb7t s\u1eaft t\u1eeb \u0111\u1ec3 t\u1ed5ng h\u1ee3p nano b\u1ea1c v\u00e0 \u1ee9ng d\u1ee5ng trong kh\u00e1ng khu\u1ea9n.<\/p>\n\n\n\n

Keywords:<\/strong> chitosan, hydrophobically modified chitosan, carboxymethyl chitosan, antibacterial activity<\/p>\n\n\n\n

Chitin l\u00e0 m\u1ed9t d\u1ea1ng polysaccharide t\u1ef1 nhi\u00ean c\u00f3 trong th\u00e0nh ph\u1ea7n c\u1ea5u t\u1ea1o c\u1ee7a v\u1ecf t\u00f4m, cua, gh\u1eb9, \u2026 Chitosan (CS) l\u00e0 d\u1eabn xu\u1ea5t thu \u0111\u01b0\u1ee3c sau qu\u00e1 tr\u00ecnh \u0111\u1ea9y nh\u00f3m ch\u1ee9c acetyl ra kh\u1ecfi c\u1ea5u tr\u00fac c\u1ee7a chitin (deacetylation). Chitosan \u0111\u00e3 v\u00e0 \u0111ang nh\u1eadn \u0111\u01b0\u1ee3c s\u1ef1 quan t\u00e2m nghi\u00ean c\u1ee9u c\u1ee7a nhi\u1ec1u nh\u00e0 khoa h\u1ecdc, c\u0169ng nh\u01b0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng kh\u00e1 nhi\u1ec1u trong c\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf. Tuy nhi\u00ean, chitosan k\u00e9m tan trong n\u01b0\u1edbc n\u00ean d\u1eabn \u0111\u1ebfn m\u1ed9t s\u1ed1 h\u1ea1n ch\u1ebf trong \u1ee9ng d\u1ee5ng. Nhi\u1ec1u nghi\u00ean c\u1ee9u \u0111\u00e3 ti\u1ebfn h\u00e0nh bi\u1ebfn \u0111\u1ed5i c\u1ea5u tr\u00fac c\u1ee7a chitosan \u0111\u1ec3 c\u1ea3i thi\u1ec7n v\u00e0 gia t\u0103ng kh\u1ea3 n\u0103ng \u1ee9ng d\u1ee5ng c\u1ee7a polymer sinh h\u1ecdc n\u00e0y.<\/p>\n\n\n\n

Ch\u00fang t\u00f4i \u0111\u00e3 bi\u1ebfn \u0111\u1ed5i nh\u00f3m ch\u1ee9c hydroxyl (-OH) v\u00e0 amino (-NH2<\/sub>) \u0111\u1ec3 \u0111i\u1ec1u ch\u1ebf hai d\u1eabn xu\u1ea5t hydrophobically modified chitosan (HMCS) v\u00e0 carboxymethyl chitosan (CMCS) d\u00f9ng trong c\u00e1c \u1ee9ng d\u1ee5ng b\u1eaft khu\u1ea9n, t\u00e1ch khu\u1ea9n, kh\u00e1ng khu\u1ea9n, x\u1eed l\u00fd m\u00f4i tr\u01b0\u1eddng.<\/p>\n\n\n\n

HMCS \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf th\u00f4ng qua ph\u1ea3n \u1ee9ng Shiff base, c\u00e1c chu\u1ed7i alkyl v\u1edbi 12 carbon \u0111\u00e3 \u0111\u01b0\u1ee3c g\u1eafn v\u00e0o c\u00e1c nh\u00f3m amino trong c\u1ea5u tr\u00fac c\u1ee7a chitosan. C\u00e1c \u0111u\u00f4i k\u1ecb n\u01b0\u1edbc c\u00f3 vai tr\u00f2 nh\u01b0 nh\u1eefng thanh g\u01b0\u01a1m ch\u00e8n v\u00e0o c\u1ea5u tr\u00fac m\u00e0ng t\u1ebf b\u00e0o v\u00e0 neo gi\u1eef vi khu\u1ea9n, sau \u0111\u00f3 ph\u00e1 h\u1ee7y m\u00e0ng t\u1ebf b\u00e0o v\u00e0 di\u1ec7t khu\u1ea9n th\u00f4ng qua c\u00e1c t\u01b0\u01a1ng t\u00e1c tr\u1ef1c ti\u1ebfp. Ngo\u00e0i ra, khi h\u00f2a tan HMCS trong m\u00f4i tr\u01b0\u1eddng acid, c\u00e1c chu\u1ed7i alkyl t\u01b0\u01a1ng t\u00e1c k\u1ecb n\u01b0\u1edbc m\u1ea1nh d\u1eabn \u0111\u1ebfn s\u1ef1 t\u0103ng \u0111\u1ed9 nh\u1edbt \u0111\u00e1ng k\u1ec3 so v\u1edbi dung d\u1ecbch chitosan. Sau qu\u00e1 tr\u00ecnh khu\u1ea5y tr\u1ed9n m\u1ea1nh, kh\u00f4ng kh\u00ed \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1n \u0111\u1ec1u trong dung d\u1ecbch HMCS t\u1ea1o th\u00e0nh h\u1ec7 b\u1ecdt b\u1ec1n (foam). Th\u00f4ng qua qu\u00e1 tr\u00ecnh s\u1ea5y l\u1ea1nh, b\u1ecdt HMCS chuy\u1ec3n th\u00e0nh c\u1ea5u tr\u00fac b\u1ecdt bi\u1ec3n (sponge) v\u1edbi \u0111\u1ed9 x\u1ed1p cao.<\/p>\n\n\n

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H\u00ecnh 1. <\/strong>\u0110i\u1ec1u ch\u1ebf HMCS th\u00f4ng qua ph\u1ea3n \u1ee9ng Shiff base.<\/figcaption><\/figure>\n<\/div>\n\n\n

1. Hydrophobically Modified Chitosan Grafted Magnetic Nanoparticles for Bacteria Removal:<\/strong> Industrial & Engineering Chemistry Research<\/em>, 2015, 54<\/em>(38), 9270-9277.<\/em><\/a><\/p>\n\n\n\n

Trong nghi\u00ean c\u1ee9u \u0111\u1ea7u ti\u00ean, ch\u00fang t\u00f4i \u0111\u00e3 g\u1eafn HMCS l\u00ean b\u1ec1 m\u1eb7t c\u00e1c h\u1ea1t nano s\u1eaft t\u1eeb v\u00e0 \u1ee9ng d\u1ee5ng t\u00e1ch khu\u1ea9n trong n\u01b0\u1edbc. C\u00e1c \u0111u\u00f4i k\u1ecb n\u01b0\u1edbc ch\u00e8n v\u00e0o m\u00e0ng t\u1ebf v\u00e0o v\u00e0 neo gi\u1eef vi khu\u1ea9n. Sau \u0111\u00f3, ch\u00fang t\u00f4i d\u00f9ng nam ch\u00e2m \u0111\u1ec3 thu h\u1ed3i c\u00e1c h\u1ea1t nano s\u1eaft v\u00e0 t\u1ebf b\u00e0o vi khu\u1ea9n c\u0169ng b\u1ecb t\u00e1ch ra kh\u1ecfi n\u01b0\u1edbc.<\/p>\n\n\n

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H\u00ecnh 2. <\/strong>T\u01b0\u01a1ng t\u00e1c c\u1ee7a HMCS tr\u00ean b\u1ec1 m\u1eb7t c\u00e1c h\u1ea1t nano s\u1eaft t\u1eeb v\u00e0 t\u1ebf b\u00e0o vi khu\u1ea9n.<\/figcaption><\/figure>\n<\/div>\n\n\n

2.<\/strong> Cells capture and antimicrobial effect of hydrophobically modified chitosan coating on Escherichia coli<\/em><\/strong>: Carbohydrate polymers<\/em>, 2017, 164, 109-117<\/a><\/p>\n\n\n\n

Sau \u0111\u00f3, ch\u00fang t\u00f4i \u0111\u00e3 d\u00f9ng dung d\u1ecbch HMCS ph\u1ee7 l\u00ean b\u1ec1 m\u1eb7t k\u00ednh v\u00e0 nghi\u00ean c\u1ee9u kh\u1ea3 n\u0103ng b\u1eaft khu\u1ea9n, kh\u00e1ng khu\u1ea9n. C\u00e1c b\u1ec1 m\u1eb7t \u0111\u01b0\u1ee3c ph\u1ee7 v\u1edbi HMCS th\u1ec3 hi\u1ec7n r\u00f5 r\u1ec7t kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c, neo gi\u1eef v\u00e0 di\u1ec7t c\u00e1c t\u1ebf b\u00e0o vi khu\u1ea9n do t\u00e1c d\u1ee5ng t\u01b0\u01a1ng t\u00e1c c\u1ee7a c\u00e1c \u0111u\u00f4i k\u1ecb n\u01b0\u1edbc tr\u00ean b\u1ec1 m\u1eb7t.<\/p>\n\n\n

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H\u00ecnh 3. <\/strong>Vi khu\u1ea9n \u0111\u01b0\u1ee3c neo gi\u1eef v\u00e0 b\u1ecb di\u1ec7t tr\u00ean b\u1ec1 m\u1eb7t k\u00ednh c\u00f3 ph\u1ee7 HMCS.<\/figcaption><\/figure>\n<\/div>\n\n\n

3a.<\/strong> Antimicrobial sponge prepared by hydrophobically modified chitosan for bacteria removal:<\/strong> Carbohydrate polymers<\/em>, 2018, 187<\/em>, 1-7<\/a>
3b.<\/strong> Hydrophobically modified chitosan sponge preparation and its application for anionic dye removal:<\/strong> Journal of environmental chemical engineering<\/em>, 2017, 5<\/em>(6), 5688-5694.<\/a><\/p>\n\n\n\n

Ngo\u00e0i ra, c\u00e1c b\u1ecdt bi\u1ec3n HMCS \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 nghi\u00ean c\u1ee9u kh\u1ea3 n\u0103ng t\u00e1ch khu\u1ea9n v\u00e0 thu\u1ed1c nhu\u1ed9m anion trong n\u01b0\u1edbc.<\/p>\n\n\n

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H\u00ecnh 4. <\/strong>B\u1ecdt bi\u1ec3n HMCS \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u00e1ch khu\u1ea9n trong n\u01b0\u1edbc<\/figcaption><\/figure>\n<\/div>\n\n
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H\u00ecnh 5. <\/strong>B\u1ecdt bi\u1ec3n HMCS \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 thu\u1ed1c nhu\u1ed9m metyl da cam trong n\u01b0\u1edbc.<\/figcaption><\/figure>\n<\/div>\n\n\n

Trong m\u1ed9t h\u01b0\u1edbng nghi\u00ean c\u1ee9u kh\u00e1c, CMCS \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf th\u00f4ng qua vi\u1ec7c bi\u1ebfn \u0111\u1ed5i c\u00e1c nh\u00f3m hydroxyl (-OH) th\u00e0nh c\u00e1c nh\u00f3m carboxyl (\u2013 COOH). Do t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c nh\u00f3m carboxyl v\u00e0 amino, CMCS c\u00f3 th\u1ec3 tan d\u1ec5 d\u00e0ng trong n\u01b0\u1edbc v\u1edbi m\u1ed9t kho\u1ea3ng pH r\u1ed9ng, c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng \u1ee9ng d\u1ee5ng v\u00e0 t\u0103ng c\u01b0\u1eddng kh\u1ea3 n\u0103ng kh\u00e1ng khu\u1ea9n. C\u00e1c t\u01b0\u01a1ng t\u00e1c l\u00e0m xu\u1ea5t hi\u1ec7n c\u00e1c \u0111i\u1ec7n t\u00edch d\u01b0\u01a1ng c\u1ee7a \u2013NH3<\/sub>+<\/sup> v\u00e0 \u00e2m c\u1ee7a \u2013COO–<\/sup>. Trong nghi\u00ean c\u1ee9u n\u00e0y, ch\u00fang t\u00f4i \u0111\u00e3 g\u1eafn c\u00e1c chu\u1ed7i CMCS l\u00ean b\u1ec1 m\u1eb7t c\u00e1c h\u1ea1t nano s\u1eaft t\u1eeb (MNPs@CMCS). C\u00e1c ion b\u1ea1c d\u01b0\u1edbi d\u1ea1ng ph\u1ee9c ch\u1ea5t, [Ag(NH3<\/sub>)2<\/sub>]+<\/sup>, \u0111\u00e3 \u0111\u01b0\u1ee3c th\u00eam v\u00e0o dung d\u1ecbch c\u00f3 c\u00e1c h\u1ea1t MNPs@CMCS. D\u1ef1a tr\u00ean t\u01b0\u01a1ng t\u00e1c t\u0129nh \u0111i\u1ec7n, c\u00e1c ion b\u1ea1c \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1n v\u00e0 neo gi\u1eef trong m\u1ea1ng l\u01b0\u1edbi c\u1ee7a CMCS. Sau \u0111\u00f3, c\u00e1c ion b\u1ea1c \u0111\u00e3 \u0111\u01b0\u1ee3c kh\u1eed \u0111\u1ec3 t\u1ea1o ra c\u00e1c h\u1ea1t nano b\u1ea1c ph\u00e2n t\u00e1n tr\u00ean b\u1ec1 m\u1eb7t c\u00e1c h\u1ea1t nano s\u1eaft t\u1eeb c\u00f3 g\u1eafn CMCS. Kh\u1ea3 n\u0103ng kh\u00e1ng khu\u1ea9n \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 d\u1ef1a tr\u00ean s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a CMCS v\u00e0 c\u00e1c h\u1ea1t nano b\u1ea1c. H\u01a1n th\u1ebf n\u1eefa, c\u00e1c h\u1ea1t s\u1eaft t\u1eeb c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u01b0a \u0111\u1ebfn nh\u1eefng n\u01a1i c\u1ea7n kh\u00e1ng khu\u1ea9n nh\u01b0 biofilm b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng nam ch\u00e2m ho\u1eb7c thu h\u1ed3i v\u00e0 t\u00e1i s\u1eed d\u1ee5ng sau khi b\u1ed5 sung nano b\u1ea1c.<\/p>\n\n\n\n

4.<\/strong> Silver deposited carboxymethyl chitosan-grafted magnetic nanoparticles as dual action deliverable antimicrobial materials:<\/strong> Materials Science and Engineering: C<\/em>, 2017, 73<\/em>, 544-551<\/a>.<\/p>\n\n\n\n

Trong c\u00e1c nghi\u00ean c\u1ee9u tr\u00ean, ch\u00fang t\u00f4i \u0111\u00e3 \u0111i\u1ec1u ch\u1ebf c\u00e1c d\u1eabn xu\u1ea5t c\u1ee7a chitosan v\u00e0 nghi\u00ean c\u1ee9u c\u00e1c t\u00ednh ch\u1ea5t c\u0169ng nh\u01b0 \u1ee9ng d\u1ee5ng \u0111\u1ec3 m\u1edf ra th\u00eam c\u00e1c ti\u1ec1m n\u0103ng s\u1eed d\u1ee5ng cho polymer sinh h\u1ecdc n\u00e0y. C\u00e1c nghi\u00ean c\u1ee9u v\u1ec1 chitosan v\u00e0 c\u00e1c d\u1eabn xu\u1ea5t c\u1ee7a chitosan v\u1eabn \u0111ang l\u00e0 m\u1ed9t ch\u1ee7 \u0111\u1ec1 \u0111\u01b0\u01a1c quan t\u00e2m kh\u00e1 nhi\u1ec1u t\u1eeb c\u00e1c nh\u00e0 khoa h\u1ecdc. Ch\u00fang t\u00f4i c\u0169ng hy v\u1ecdng c\u00e1c nghi\u00ean c\u1ee9u n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o s\u1eed d\u1ee5ng trong t\u01b0\u01a1ng lai g\u1ea7n.<\/p>\n\n\n

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H\u00ecnh 6. <\/strong>Nano b\u1ea1c \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p tr\u00ean b\u1ec1 m\u1eb7t c\u00e1c h\u1ea1t nano s\u1eaft t\u1eeb c\u00f3 g\u1eafn CMCS d\u00f9ng trong kh\u00e1ng khu\u1ea9n.<\/figcaption><\/figure>\n<\/div>\n\n\n

Th\u00f4ng tin th\u00eam v\u1ec1 t\u00e1c gi\u1ea3:<\/strong>
Ts. V\u00f5 \u0110\u1ee9c Th\u1eafng<\/a><\/p>\n\n\n\n

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Dr. Vo Duc Thang, College of Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan<\/p>","protected":false},"author":1,"featured_media":1984,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[19,6],"tags":[26,30,49,73,87,100],"class_list":["post-1980","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hoa-hoc-sinh-hoc-vat-lieu","category-nghien-cuu-khoa-hoc","tag-bien-doi-cau-truc","tag-chitosan","tag-khang-khuan","tag-tach-khuan","tag-ts-vo-duc-thang","tag-xu-ly-moi-truong","two-columns"],"yoast_head":"\nBI\u1ebeN \u0110\u1ed4I C\u1ea4U TR\u00daC CHITOSAN V\u00c0 \u1ee8NG D\u1ee4NG TRONG B\u1eaeT KHU\u1ea8N, T\u00c1CH KHU\u1ea8N, KH\u00c1NG KHU\u1ea8N, X\u1eec L\u00dd M\u00d4I TR\u01af\u1edcNG -<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/trithuctretw.com\/en\/bien-doi-cau-truc-chitosan-va-ung-dung-trong-bat-khuan-tach-khuan-khang-khuan-xu-ly-moi-truong\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"BI\u1ebeN \u0110\u1ed4I C\u1ea4U TR\u00daC CHITOSAN V\u00c0 \u1ee8NG D\u1ee4NG TRONG B\u1eaeT KHU\u1ea8N, T\u00c1CH KHU\u1ea8N, KH\u00c1NG KHU\u1ea8N, X\u1eec L\u00dd M\u00d4I TR\u01af\u1edcNG -\" \/>\n<meta property=\"og:description\" content=\"Ts. 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