{"id":502,"date":"2017-12-27T11:10:27","date_gmt":"2017-12-27T04:10:27","guid":{"rendered":"https:\/\/tapchidouong.com.vn\/?p=502"},"modified":"2017-12-27T11:10:27","modified_gmt":"2017-12-27T04:10:27","slug":"bao-ve-rang-mieng-bang-malitol","status":"publish","type":"post","link":"https:\/\/douongvietnam.net\/?p=502","title":{"rendered":"B\u1ea3o v\u1ec7 r\u0103ng mi\u1ec7ng b\u1eb1ng malitol"},"content":{"rendered":"

Ch\u00fang ta \u0111\u00e3 qu\u00e1 quen thu\u1ed9c v\u1edbi nh\u1eefng lo\u1ea1i b\u00e1nh, m\u1ee9t, k\u1eb9o cao su nh\u01b0 m\u1ed9t ph\u1ea7n c\u1ee7a \u0111\u1eddi s\u1ed1ng \u1ea9m th\u1ef1c. Tuy nhi\u00ean, h\u1ea7u h\u1ebft ch\u00fang \u0111\u1ec1u \u0111\u01b0\u1ee3c l\u00e0m ng\u1ecdt b\u1eb1ng \u0111\u01b0\u1eddng n\u00ean d\u00f9ng nhi\u1ec1u s\u1ebd kh\u00f4ng t\u1ed1t cho r\u0103ng mi\u1ec7ng. \u00dd th\u1ee9c \u0111\u01b0\u1ee3c \u0111i\u1ec1u \u0111\u00f3, c\u00e1c nh\u00e0 khoa h\u1ecdc \u0111ang kh\u1ea9n tr\u01b0\u01a1ng t\u00ecm ra c\u00e1c ch\u1ea5t t\u1ea1o ng\u1ecdt thay th\u1ebf \u0111\u01b0\u1eddng m\u00e0 kh\u00f4ng g\u00e2y t\u00e1c d\u1ee5ng ph\u1ee5. Ch\u1ea5t t\u1ea1o ng\u1ecdt malitol l\u00e0 m\u1ed9t trong s\u1ed1 \u0111\u00f3.<\/em><\/strong><\/p>\n

\"\"<\/p>\n

MALITOL L\u00c0 G\u00cc?<\/strong><\/p>\n

Malitol l\u00e0 m\u1ed9t ho\u1ea1t ch\u1ea5t thu\u1ed9c nh\u00f3m polyol g\u1ed3m c\u00e1c ch\u1ea5t nh\u01b0: Malitol, sorbitol, maliotl, mannitol v\u00e0 xylitol (\u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c s\u1ea3n ph\u1ea9m k\u1eb9o cao su). Nh\u00f3m ch\u1ea5t polytol l\u00e0 nh\u1eefng cacbon hydrat \u0111\u00e3 \u0111\u01b0\u1ee3c hidro h\u00f3a, ch\u00fang t\u1ed3n t\u1ea1i r\u1ea5t nhi\u1ec1u trong rau xanh v\u00e0 hoa qu\u1ea3. S\u1edf d\u0129 malitol \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ch\u1ea5t ng\u1ecdt, v\u00ec n\u00f3 c\u00f3 c\u00e1c t\u00ednh ch\u1ea5t t\u01b0\u01a1ng t\u1ef1 nh\u01b0 \u0111\u01b0\u1eddng c\u00e1t nh\u01b0ng c\u00f3 m\u00e0u n\u00e2u v\u00e0 \u0111\u1ed9 ng\u1ecdt b\u1eb1ng 90% \u0111\u01b0\u1eddng c\u00e1t. N\u00f3 ch\u1ee9a \u00edt calo h\u01a1n \u0111\u01b0\u1eddng (2,4kcal\/g so v\u1edbi 4,0kcal\/g c\u1ee7a \u0111\u01b0\u1eddng) n\u00ean kh\u00f4ng g\u00e2y s\u00e2u r\u0103ng v\u00e0 \u00edt \u1ea3nh h\u01b0\u1edfng t\u1edbi glucose m\u00e1u. Tuy nhi\u00ean, qu\u00e1 nhi\u1ec1u malitol l\u1ea1i l\u00e0m \u0111au d\u1ea1 d\u00e0y. V\u00ec nh\u1eefng \u01b0u \u0111i\u1ec3m n\u00e0y n\u00ean malitol \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m, d\u01b0\u1ee3c ph\u1ea9m c\u0169ng nh\u01b0 c\u00e1c s\u1ea3n ph\u1ea9m ch\u0103m s\u00f3c r\u0103ng mi\u1ec7ng kh\u00e1c.<\/p>\n

C\u00c1C B\u1ec6NH R\u0102NG MI\u1ec6NG<\/strong><\/p>\n

\u0110\u00e2y l\u00e0 kh\u00e1i ni\u1ec7m chung, \u00e1m ch\u1ec9 nh\u1eefng th\u01b0\u01a1ng t\u1ed5n g\u00e2y ra s\u1ef1 m\u1ea5t kho\u00e1ng c\u1ee7a m\u00f4 c\u1ee9ng tr\u00ean r\u0103ng, m\u00e0 s\u1ef1 m\u1ea5t kho\u00e1ng n\u00e0y l\u1ea1i b\u1eaft ngu\u1ed3n t\u1eeb nh\u1eefng axit do c\u00e1c m\u1ea3ng vi khu\u1ea9n b\u00e1m tr\u00ean r\u0103ng l\u00ean men cacbon hydrat t\u1ea1o th\u00e0nh. Khi l\u01b0\u1ee3ng axit s\u1ea3n sinh ra qu\u00e1 nhi\u1ec1u th\u00ec \u0111\u1ed9 pH b\u1ecb gi\u1ea3m xu\u1ed1ng (d\u01b0\u1edbi 5,7) l\u00e0m m\u00f2n l\u1edbp men r\u0103ng. N\u1ebfu qu\u00e1 tr\u00ecnh axit h\u00f3a n\u00e0y k\u00e9o d\u00e0i, l\u1edbp men b\u1ecb m\u1ea5t kh\u00f4ng k\u1ecbp t\u00e1i t\u1ea1o th\u00ec s\u1ebd \u0111\u1ec3 l\u1ea1i nh\u1eefng l\u1ed7 h\u1ed5ng tr\u00ean r\u0103ng, c\u00f2n g\u1ecdi l\u00e0 s\u00e2u r\u0103ng. T\u1eeb \u0111\u00f3 nhi\u1ec1u c\u0103n b\u1ec7nh r\u0103ng mi\u1ec7ng kh\u00e1c xu\u1ea5t hi\u1ec7n.<\/p>\n

VAI TR\u00d2 C\u1ee6A MALITOL \u0110\u1ed0I V\u1edaI VI\u1ec6C B\u1ea2O V\u1ec6 R\u0102NG<\/strong><\/p>\n

\u0110a ph\u1ea7n h\u1ec7 vi sinh v\u1eadt khoang mi\u1ec7ng \u0111\u1ec1u l\u00e0 lo\u1ea1i c\u00f3 l\u1ee3i, song v\u1eabn c\u00f3 m\u1ed9t v\u00e0i lo\u1ea1i ch\u1ee9a m\u1ea7m b\u1ec7nh. C\u1ea3 hai d\u00f2ng vi khu\u1ea9n n\u00e0y \u0111\u1ec1u t\u01b0\u01a1ng t\u00e1c m\u1ed9t c\u00e1ch c\u00e2n b\u1eb1ng v\u1edbi nhau trong \u0111i\u1ec1u ki\u1ec7n b\u00ecnh th\u01b0\u1eddng. D\u00f2ng vi khu\u1ea9n mang m\u1ea7m b\u1ec7nh ch\u1ee7 y\u1ebfu l\u00e0 \u0111\u1ed9t bi\u1ebfn c\u1ee7a streptococci v\u00e0 lactobaccili v\u00e0 \u0111\u1ec1u g\u00e2y m\u1ea5t kho\u00e1ng, t\u1ee9c l\u00e0 b\u00e0o m\u00f2n men r\u0103ng. Nh\u1eefng vi khu\u1ea9n n\u00e0y t\u1ed3n t\u1ea1i t\u1ef1 nhi\u00ean tr\u00ean r\u0103ng, nh\u01b0ng kh\u00f4ng sinh ra nhi\u1ec1u axit n\u1ebfu ch\u00fang ta tu\u00e2n th\u1ee7 ch\u1ebf \u0111\u1ed9 \u0103n h\u1ee3p l\u00fd. Nh\u1edd \u0111\u00f3, m\u1ed1i t\u01b0\u01a1ng t\u00e1c m\u1ea5t kho\u00e1ng \u2013 b\u00f9 kho\u00e1ng \u1edf m\u1ee9c c\u00e2n b\u1eb1ng. Nh\u01b0ng khi s\u1ed1 l\u01b0\u1ee3ng vi khu\u1ea9n g\u00e2y b\u1ec7nh l\u1ea5n \u00e1t th\u00ec l\u01b0\u1ee3ng axit sinh ra qu\u00e1 nhi\u1ec1u s\u1ebd g\u00e2y s\u00e2u r\u0103ng, l\u00e0m gi\u1ea3m \u0111\u1ed9 pH c\u1ee7a n\u01b0\u1edbc b\u1ecdt…<\/p>\n

\u0110\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n v\u1ea5n \u0111\u1ec1 n\u00e0y, c\u00e1c nh\u00e0 khoa h\u1ecdc thu\u1ed9c Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc Amsterdam (H\u00e0 Lan) \u0111\u00e3 ti\u1ebfn h\u00e0nh th\u1ef1c nghi\u1ec7m tr\u00ean hai nh\u00f3m t\u00ecnh nguy\u1ec7n vi\u00ean. C\u1ea3 hai nh\u00f3m \u0111\u1ec1u \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u nhai k\u1eb9o cao su n\u0103m l\u1ea7n\/ng\u00e0y. M\u1ed9t nh\u00f3m d\u00f9ng k\u1eb9o cao su th\u00f4ng th\u01b0\u1eddng (c\u00f3 \u0111\u01b0\u1eddng), nh\u00f3m c\u00f2n l\u1ea1i d\u00f9ng k\u1eb9o ch\u1ee9a malitol. Sau b\u1ed1n tu\u1ea7n, k\u00ednh hi\u1ec3n vi \u0111\u00e3 cho th\u1ea5y k\u1ebft qu\u1ea3 ki\u1ec3m tra m\u1eabu r\u0103ng c\u1ee7a hai nh\u00f3m tr\u00ean. R\u0103ng c\u1ee7a nh\u1eefng ng\u01b0\u1eddi nhai k\u1eb9o malitol c\u00f3 \u00edt l\u1ed7 h\u1ed5ng h\u01a1n, v\u00ec ch\u00fang kh\u00f4ng l\u00e0m s\u1ea3n sinh ra axit, v\u00e0 do \u0111\u00f3 \u0111\u1ed9 pH kh\u00f4ng qu\u00e1 th\u1ea5p. Malitol c\u0169ng l\u00e0m gi\u1ea3m ho\u1ea1t \u0111\u1ed9ng c\u1ee7a enzym ph\u00e2n h\u00f3a cacbon hydrat (glucan sucrase) v\u00e0 n\u1ed3ng \u0111\u1ed9 protein li\u00ean k\u1ebft. \u0110i\u1ec1u \u0111\u00f3 ch\u1ee9ng t\u1ecf s\u1ef1 \u0111i\u1ec1u ti\u1ebft c\u1ee7a vi khu\u1ea9n khoang mi\u1ec7ng theo h\u01b0\u1edbng gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng vi khu\u1ea9n g\u00e2y axit h\u00f3a. M\u1eb7c d\u00f9 v\u1eady, k\u1ebft qu\u1ea3 n\u00e0y v\u1eabn c\u1ea7n \u0111\u01b0\u1ee3c ki\u1ec3m nghi\u1ec7m th\u00eam.<\/p>\n

Ngo\u00e0i ra, vai tr\u00f2 c\u1ee7a n\u01b0\u1edbc b\u1ecdt c\u0169ng r\u1ea5t quan tr\u1ecdng nh\u1edd c\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng sinh h\u1ecdc nh\u01b0 l\u00e0 m\u1ed9t enzym l\u00ean men \u0111\u1ec3 chuy\u1ec3n h\u00f3a cacbon hydrat th\u00e0nh axit c\u00f9ng c\u00e1c ho\u1ea1t \u0111\u1ed9ng b\u1ed5 tr\u1ee3.<\/p>\n

NH\u1eeeNG T\u00c1C D\u1ee4NG KH\u00c1C C\u1ee6A MALITOL<\/strong><\/p>\n

N\u01b0\u1edbu l\u00e0 th\u00e0nh ph\u1ea7n r\u1ea5t quan tr\u1ecdng c\u1ee7a r\u0103ng v\u00e0 r\u1ea5t nh\u1ea1y c\u1ea3m v\u1edbi c\u00e1c m\u1ea7m b\u1ec7nh c\u00f3 th\u1ec3 l\u00e0m m\u1ea5t ch\u1ea5t g\u00f4m (c\u1ee7a n\u01b0\u1edbu), th\u1eadm ch\u00ed l\u00e0 m\u1ea5t r\u0103ng. Quay tr\u1edf l\u1ea1i th\u00ed nghi\u1ec7m tr\u00ean, ng\u01b0\u1eddi ta ti\u1ebfn h\u00e0nh giai \u0111o\u1ea1n hai b\u1eb1ng c\u00e1ch, y\u00eau c\u1ea7u t\u00ecnh nguy\u1ec7n vi\u00ean ch\u1ec9 \u0111\u00e1nh r\u0103ng \u1edf h\u00e0m tr\u00ean. Sau \u0111\u00f3, m\u1ed7i t\u00ecnh nguy\u1ec7n vi\u00ean nhai k\u1eb9o cao su kh\u00f4ng \u0111\u01b0\u1eddng 5 l\u1ea7n\/ng\u00e0y trong v\u00f2ng 21 ng\u00e0y. K\u1ebft qu\u1ea3 kh\u00e1m nghi\u1ec7m sau t\u00e1m tu\u1ea7n cho th\u1ea5y, t\u1ec9 l\u1ec7 ch\u1ea3y m\u00e1u c\u1ee7a n\u01b0\u1edbu gi\u1ea3m \u0111\u00e1ng k\u1ec3 \u1edf nh\u1eefng ng\u01b0\u1eddi nhai k\u1eb9o cao su ch\u1ee9a malitol (thay cho \u0111\u01b0\u1eddng) so v\u1edbi nh\u00f3m d\u00f9ng k\u1eb9o cao su th\u00f4ng th\u01b0\u1eddng. V\u00ec th\u1ebf, c\u00e1c nh\u00e0 khoa h\u1ecdc k\u1ebft lu\u1eadn r\u1eb1ng, k\u1eb9o cao su malitol ng\u0103n ng\u1eeba s\u1ef1 vi\u00eam l\u1ee3i trong th\u1eddi gian d\u00e0i.<\/p>\n

\"\"<\/p>\n

So s\u00e1nh b\u1ec1 m\u1eb7t men r\u0103ng: T\u1ed1c \u0111\u1ed9 b\u00f9 kho\u00e1ng \u1edf ng\u01b0\u1eddi d\u00f9ng k\u1eb9o cao su th\u01b0\u1eddng (\u1ea3nh b\u00ean tr\u00e1i) ch\u1eadm h\u01a1n so v\u1edbi ng\u01b0\u1eddi d\u00f9ng k\u1eb9o cao su malitol (\u1ea3nh b\u00ean ph\u1ea3i), n\u00ean men r\u0103ng b\u1ecb th\u01b0\u01a1ng h\u1ed5n nhi\u1ec1u h\u01a1n.<\/em><\/p>\n

NGUY\u1ec4N NGUY\u1ec4N (theo apfoodonline.com)<\/em><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Ch\u00fang ta \u0111\u00e3 qu\u00e1 quen thu\u1ed9c v\u1edbi nh\u1eefng lo\u1ea1i b\u00e1nh, m\u1ee9t, k\u1eb9o cao su nh\u01b0 m\u1ed9t ph\u1ea7n c\u1ee7a \u0111\u1eddi s\u1ed1ng \u1ea9m th\u1ef1c. Tuy nhi\u00ean, h\u1ea7u h\u1ebft ch\u00fang \u0111\u1ec1u \u0111\u01b0\u1ee3c l\u00e0m ng\u1ecdt b\u1eb1ng \u0111\u01b0\u1eddng n\u00ean d\u00f9ng nhi\u1ec1u s\u1ebd kh\u00f4ng t\u1ed1t cho r\u0103ng mi\u1ec7ng. \u00dd th\u1ee9c \u0111\u01b0\u1ee3c \u0111i\u1ec1u \u0111\u00f3, c\u00e1c nh\u00e0 khoa h\u1ecdc \u0111ang kh\u1ea9n tr\u01b0\u01a1ng t\u00ecm […]<\/p>\n","protected":false},"author":5,"featured_media":503,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jnews-multi-image_gallery":[],"jnews_single_post":[],"jnews_primary_category":[],"jnews_override_counter":[],"footnotes":""},"categories":[8],"tags":[68,67],"class_list":["post-502","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-song","tag-bao-ve-rang-mieng","tag-cac-benh-rang-mieng"],"_links":{"self":[{"href":"https:\/\/douongvietnam.net\/index.php?rest_route=\/wp\/v2\/posts\/502","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/douongvietnam.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/douongvietnam.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/douongvietnam.net\/index.php?rest_route=\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/douongvietnam.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=502"}],"version-history":[{"count":1,"href":"https:\/\/douongvietnam.net\/index.php?rest_route=\/wp\/v2\/posts\/502\/revisions"}],"predecessor-version":[{"id":505,"href":"https:\/\/douongvietnam.net\/index.php?rest_route=\/wp\/v2\/posts\/502\/revisions\/505"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/douongvietnam.net\/index.php?rest_route=\/wp\/v2\/media\/503"}],"wp:attachment":[{"href":"https:\/\/douongvietnam.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=502"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/douongvietnam.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=502"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/douongvietnam.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=502"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}