C\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u t\u1ea1i UCLA \u0111\u01b0a ra c\u1ea3nh b\u00e1o v\u1ec1 nguy c\u01a1 k\u1eb9o cao su th\u1ea3i ra m\u1ed9t l\u01b0\u1ee3ng l\u1edbn vi nh\u1ef1a v\u00e0o mi\u1ec7ng, c\u00f3 kh\u1ea3 n\u0103ng b\u1ecb nu\u1ed1t v\u00e0o.<\/p>\n
Nghi\u00ean c\u1ee9u c\u1ee7a h\u1ecd \u0111i\u1ec1u tra vi\u1ec7c gi\u1ea3i ph\u00f3ng vi nh\u1ef1a, nh\u1ecf h\u01a1n 5mm, t\u1eeb k\u1eb9o cao su t\u1ef1 nhi\u00ean v\u00e0 t\u1ed5ng h\u1ee3p. Nh\u1eefng h\u1ea1t nh\u1ef1a nh\u1ecf n\u00e0y tr\u1edf n\u00ean ph\u1ed5 bi\u1ebfn trong m\u00f4i tr\u01b0\u1eddng v\u00e0 \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong nhi\u1ec1u c\u01a1 quan n\u1ed9i t\u1ea1ng c\u1ee7a con ng\u01b0\u1eddi, g\u00e2y n\u00ean m\u1ed1i lo ng\u1ea1i v\u1ec1 t\u00e1c \u0111\u1ed9ng ti\u1ec1m \u1ea9n \u0111\u1ed1i v\u1edbi s\u1ee9c kh\u1ecfe.<\/p>\n
C\u00e1c nh\u00e0 khoa h\u1ecdc, do Gi\u00e1o S\u01b0 Sanjay Mohanty \u0111\u1ee9ng \u0111\u1ea7u, n\u00f3i nghi\u00ean c\u1ee9u c\u1ee7a h\u1ecd nh\u1eb1m m\u1ee5c \u0111\u00edch ki\u1ec3m tra m\u1ee9c \u0111\u1ed9 ti\u1ebfp x\u00fac h\u00e0ng ng\u00e0y v\u1edbi cao su, kh\u00f4ng ph\u1ea3i \u0111\u1ec3 g\u00e2y b\u00e1o \u0111\u1ed9ng. M\u1eb7c d\u00f9 v\u1eabn ch\u01b0a bi\u1ebft r\u00f5 v\u1ec1 t\u00e1c \u0111\u1ed9ng l\u00e2u d\u00e0i c\u1ee7a vi nh\u1ef1a \u0111\u1ed1i v\u1edbi s\u1ee9c kh\u1ecfe, nh\u01b0ng c\u00e1c nghi\u00ean c\u1ee9u tr\u00ean \u0111\u1ed9ng v\u1eadt v\u00e0 t\u1ebf b\u00e0o ng\u01b0\u1eddi cho th\u1ea5y t\u00e1c h\u1ea1i ti\u1ec1m \u1ea9n.<\/p>\n
Nh\u00f3m nghi\u00ean c\u1ee9u ti\u1ebfn h\u00e0nh c\u00e1c th\u00ed nghi\u1ec7m s\u1eed d\u1ee5ng m\u01b0\u1eddi nh\u00e3n hi\u1ec7u k\u1eb9o cao su th\u01b0\u01a1ng m\u1ea1i, n\u0103m nh\u00e3n hi\u1ec7u t\u1ef1 nhi\u00ean v\u00e0 n\u0103m lo\u1ea1i t\u1ed5ng h\u1ee3p. K\u1eb9o cao su t\u1ef1 nhi\u00ean s\u1eed d\u1ee5ng polyme c\u00f3 ngu\u1ed3n g\u1ed1c th\u1ef1c v\u1eadt, trong khi k\u1eb9o cao su t\u1ed5ng h\u1ee3p s\u1eed d\u1ee5ng polyme c\u00f3 ngu\u1ed3n g\u1ed1c t\u1eeb d\u1ea7u m\u1ecf.<\/p>\n
Trong c\u00e1c th\u00ed nghi\u1ec7m, nh\u1eefng ng\u01b0\u1eddi tham gia nhai t\u1eebng lo\u1ea1i k\u1eb9o cao su trong b\u1ed1n ph\u00fat, v\u1edbi c\u00e1c m\u1eabu n\u01b0\u1edbc b\u1ecdt \u0111\u01b0\u1ee3c thu th\u1eadp theo t\u1eebng kho\u1ea3ng th\u1eddi gian. M\u1ed9t th\u00ed nghi\u1ec7m th\u1ee9 hai ph\u00e2n t\u00edch c\u00e1c m\u1eabu n\u01b0\u1edbc b\u1ecdt trong h\u01a1n 20 ph\u00fat \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh t\u1ed1c \u0111\u1ed9 th\u1ea3i ra c\u1ee7a vi nh\u1ef1a. C\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u nhu\u1ed9m c\u00e1c h\u1ea1t m\u00e0u \u0111\u1ecf v\u00e0 \u0111\u1ebfm nh\u1eefng h\u1ea1t \u0111\u00f3 d\u01b0\u1edbi k\u00ednh hi\u1ec3n vi, \u0111\u1ed3ng th\u1eddi ph\u00e2n t\u00edch th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a c\u00e1c h\u1ea1t. H\u1ecd th\u1eeba nh\u1eadn ph\u01b0\u01a1ng ph\u00e1p n\u00e0y ch\u1ec9 ph\u00e1t hi\u1ec7n ra c\u00e1c h\u1ea1t l\u1edbn h\u01a1n 20 micromet, c\u00f3 kh\u1ea3 n\u0103ng \u0111\u00e1nh gi\u00e1 th\u1ea5p t\u1ed5ng s\u1ed1 h\u1ea1t vi nh\u1ef1a.<\/p>\n
Nghi\u00ean c\u1ee9u cho th\u1ea5y m\u1ed9t gam k\u1eb9o cao su ti\u1ebft ra trung b\u00ecnh 100 h\u1ea1t vi nh\u1ef1a, m\u1ed9t s\u1ed1 m\u1ea3nh ph\u00f3ng th\u00edch t\u1edbi 600 h\u1ea1t tr\u00ean m\u1ed9t gram. V\u1edbi m\u1ed9t s\u1ed1 m\u1ea3nh k\u1eb9o cao su n\u1eb7ng t\u1edbi s\u00e1u gram, m\u1ed9t m\u1ea3nh c\u00f3 nguy c\u01a1 th\u1ea3i t\u1edbi 3,000 h\u1ea1t nh\u1ef1a. C\u00f3 m\u1ed9t \u0111i\u1ec1u \u0111\u00e1ng ng\u1ea1c nhi\u00ean, c\u1ea3 k\u1eb9o cao su t\u1ef1 nhi\u00ean v\u00e0 t\u1ed5ng h\u1ee3p \u0111\u1ec1u ti\u1ebft ra m\u1ed9t l\u01b0\u1ee3ng vi nh\u1ef1a t\u01b0\u01a1ng t\u1ef1, ch\u1ee7 y\u1ebfu l\u00e0 polyolefin, nh\u01b0 polyethylene v\u00e0 polypropylene.<\/p>\n
Ph\u1ea7n l\u1edbn vi nh\u1ef1a b\u1ecb th\u1ea3i ra trong v\u00f2ng hai ph\u00fat \u0111\u1ea7u ti\u00ean sau khi nhai, v\u1edbi 94% \u0111\u01b0\u1ee3c ti\u1ebft ra trong v\u00f2ng t\u00e1m ph\u00fat, do t\u00e1c \u0111\u1ed9ng c\u01a1 h\u1ecdc ch\u1ee9 kh\u00f4ng ph\u1ea3i do \u0111\u1eb7c t\u00ednh enzyme c\u1ee7a n\u01b0\u1edbc b\u1ecdt. D\u1ef1a tr\u00ean nh\u1eefng ph\u00e1t hi\u1ec7n n\u00e0y, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u cho bi\u1ebft vi\u1ec7c nhai l\u00e2u m\u1ed9t mi\u1ebfng k\u1eb9o cao su c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m ti\u1ebfp x\u00fac v\u1edbi vi nh\u1ef1a so v\u1edbi vi\u1ec7c nhai nhi\u1ec1u mi\u1ebfng.<\/p>\n
Nghi\u00ean c\u1ee9u c\u0169ng nh\u1ea5n m\u1ea1nh \u0111\u1ebfn t\u00e1c \u0111\u1ed9ng m\u00f4i tr\u01b0\u1eddng c\u1ee7a k\u1eb9o cao su b\u1ecb v\u1ee9t b\u1ecf, khi nh\u1ef1a \u0111\u01b0\u1ee3c ti\u1ebft v\u00e0o n\u01b0\u1edbc b\u1ecdt ch\u1ec9 l\u00e0 m\u1ed9t ph\u1ea7n nh\u1ecf trong t\u1ed5ng h\u00e0m l\u01b0\u1ee3ng nh\u1ef1a c\u1ee7a k\u1eb9o cao su. H\u1ecd k\u00eau g\u1ecdi x\u1eed l\u00fd c\u00f3 tr\u00e1ch nhi\u1ec7m \u0111\u1ec3 gi\u1ea3m thi\u1ec3u \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng.<\/p>\n
Trong khi nghi\u00ean c\u1ee9u ph\u00e1t hi\u1ec7n ra m\u1ed9t l\u01b0\u1ee3ng l\u1edbn vi nh\u1ef1a \u0111\u01b0\u1ee3c th\u1ea3i ra, gi\u00e1o s\u01b0 Oliver Jones t\u1eeb RMIT University l\u01b0u \u00fd l\u01b0\u1ee3ng n\u00e0y t\u01b0\u01a1ng \u0111\u1ed1i nh\u1ecf v\u00e0 ni\u00eam m\u1ea1c ru\u1ed9t c\u00f3 kh\u1ea3 n\u0103ng ng\u0103n ch\u1eb7n s\u1ef1 h\u1ea5p th\u1ee5 \u0111\u00e1ng k\u1ec3. Nh\u1eefng ph\u00e1t hi\u1ec7n n\u00e0y \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y t\u1ea1i cu\u1ed9c h\u1ecdp m\u00f9a xu\u00e2n c\u1ee7a Hi\u1ec7p H\u1ed9i H\u00f3a H\u1ecdc Hoa K\u1ef3 (American Chemical Society).<\/p>\n
Theo c\u00e1c chuy\u00ean gia, m\u1ed1i lo ng\u1ea1i v\u1ec1 vi nh\u1ef1a trong k\u1eb9o cao su kh\u00f4ng \u1edf m\u1ee9c ph\u1ea3i b\u00e1o \u0111\u1ed9ng. M\u1ed9t nghi\u00ean c\u1ee9u th\u00ed \u0111i\u1ec3m g\u1ea7n \u0111\u00e2y, m\u1eb7c d\u00f9 nh\u1ea5n m\u1ea1nh \u0111\u1ebfn s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a c\u00e1c h\u1ea1t n\u00e0y, nh\u01b0ng kh\u00f4ng nh\u1ea5t thi\u1ebft ph\u1ea3i b\u1ecf vi\u1ec7c ti\u00eau th\u1ee5 k\u1eb9o cao su.<\/p>\n
Hi\u1ec7p H\u1ed9i\u00a0B\u00e1nh K\u1eb9o Qu\u1ed1c Gia (The National Confectioners Association-NCA) nh\u1ea5n m\u1ea1nh t\u00ednh an to\u00e0n l\u00e2u \u0111\u1eddi c\u1ee7a k\u1eb9o cao su, kh\u1eb3ng \u0111\u1ecbnh r\u1eb1ng k\u1eb9o cao su \u0111\u01b0\u1ee3c d\u00f9ng trong h\u01a1n m\u1ed9t th\u1ebf k\u1ef7 m\u00e0 kh\u00f4ng g\u00e2y ra r\u1ee7i ro \u0111\u00e1ng k\u1ec3 cho s\u1ee9c kh\u1ecfe. H\u1ecd tr\u1ea5n an ng\u01b0\u1eddi ti\u00eau d\u00f9ng v\u1ec1 vi\u1ec7c c\u00e1c c\u00f4ng ty b\u00e1nh k\u1eb9o c\u1ee7a Hoa K\u1ef3 lu\u00f4n \u01b0u ti\u00ean v\u1ea5n \u0111\u1ec1 an to\u00e0n th\u1ef1c ph\u1ea9m, tu\u00e2n th\u1ee7 c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u01b0\u1ee3c C\u1ee5c Qu\u1ea3n L\u00fd Th\u1ef1c Ph\u1ea9m v\u00e0 D\u01b0\u1ee3c Ph\u1ea9m\u00a0cho ph\u00e9p.<\/p>\n
\u201cT\u00f3m l\u1ea1i, trong khi vi nh\u1ef1a l\u00e0 th\u1ee9 ch\u00fang ta ch\u1eafc ch\u1eafn n\u00ean \u0111\u1ec3 m\u1eaft \u0111\u1ebfn, t\u00f4i ngh\u0129 b\u1ea1n ph\u1ea3i b\u1ecf nhai k\u1eb9o cao su li\u1ec1n,\u201d Gi\u00e1o S\u01b0 Mohanty k\u1ebft lu\u1eadn.<\/p>\n
The post K\u1eb9o cao su th\u1ea3i ra m\u1ed9t l\u01b0\u1ee3ng vi nh\u1ef1a \u0111\u1ed9c h\u1ea1i<\/a> appeared first on Saigon Nh\u1ecf<\/a>.<\/p>\n \u00a0<\/p>","protected":false},"excerpt":{"rendered":" C\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u t\u1ea1i UCLA \u0111\u01b0a ra c\u1ea3nh b\u00e1o v\u1ec1 nguy c\u01a1 k\u1eb9o cao su th\u1ea3i ra m\u1ed9t l\u01b0\u1ee3ng l\u1edbn vi nh\u1ef1a v\u00e0o mi\u1ec7ng, c\u00f3 kh\u1ea3 n\u0103ng b\u1ecb nu\u1ed1t v\u00e0o. Nghi\u00ean c\u1ee9u c\u1ee7a h\u1ecd \u0111i\u1ec1u tra vi\u1ec7c gi\u1ea3i ph\u00f3ng vi nh\u1ef1a, nh\u1ecf h\u01a1n 5mm, t\u1eeb k\u1eb9o cao su t\u1ef1 nhi\u00ean v\u00e0 t\u1ed5ng h\u1ee3p. Nh\u1eefng …<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[43],"tags":[],"class_list":["post-55903","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-health"],"_links":{"self":[{"href":"https:\/\/vietvalley.com\/en\/wp-json\/wp\/v2\/posts\/55903","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vietvalley.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vietvalley.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vietvalley.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/vietvalley.com\/en\/wp-json\/wp\/v2\/comments?post=55903"}],"version-history":[{"count":0,"href":"https:\/\/vietvalley.com\/en\/wp-json\/wp\/v2\/posts\/55903\/revisions"}],"wp:attachment":[{"href":"https:\/\/vietvalley.com\/en\/wp-json\/wp\/v2\/media?parent=55903"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vietvalley.com\/en\/wp-json\/wp\/v2\/categories?post=55903"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vietvalley.com\/en\/wp-json\/wp\/v2\/tags?post=55903"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}