N\u0103m 1983, nhi\u1ec1u n\u01a1i tr\u00ean th\u1ebf gi\u1edbi ng\u01b0\u1eddi ta b\u1ed7ng ph\u00e1t hi\u1ec7n th\u1ea5y r\u00f9a bi\u1ec3n ch\u1ebft h\u00e0ng lo\u1ea1t. C\u00f3 ph\u1ea3i v\u00ec ch\u00fang thi\u1ebfu th\u1ee9c \u0103n n\u00ean b\u1ecb ch\u1ebft \u0111\u00f3i kh\u00f4ng?<\/p>\n\n\n\n
Hi\u1ec7n t\u01b0\u1ee3ng r\u00f9a bi\u1ec3n ch\u1ebft h\u00e0ng lo\u1ea1t k\u00ec l\u1ea1 n\u00e0y \u0111\u00e3 g\u00e2y s\u1ef1 ch\u00fa \u00fd cho c\u00e1c nh\u00e0 khoa h\u1ecdc. Qua \u0111i\u1ec1u tra nghi\u00ean c\u1ee9u cu\u1ed1i c\u00f9ng h\u1ecd \u0111\u00e3 t\u00ecm th\u1ea5y \u201chung th\u1ee7\u201d g\u00e2y ra r\u00f9a bi\u1ec3n ch\u1ebft h\u00e0ng lo\u1ea1t l\u00e0 c\u00e1c t\u00fai nilon. Gi\u1ea3i ph\u1eabu x\u00e1c r\u00f9a, ng\u01b0\u1eddi ta ph\u00e1t hi\u1ec7n trong d\u1ea1 d\u00e0y ch\u00fang c\u00f3 r\u1ea5t nhi\u1ec1u t\u00fai nilon, con ch\u1ee9a nhi\u1ec1u nh\u1ea5t l\u00e0 15 t\u00fai. R\u00f9a bi\u1ec3n r\u1ea5t th\u00edch \u0103n con s\u1ee9a. Ch\u00fang nh\u1ea7m nh\u1eefng t\u00fai nilon v\u1ee9t xu\u1ed1ng bi\u1ec3n l\u00e0 s\u1ee9a n\u00ean nu\u1ed1t v\u00e0o b\u1ee5ng, v\u00ec v\u1eady ch\u00fang m\u1edbi g\u1eb7p tai h\u1ecda n\u00e0y.<\/p>\n\n\n\n
V\u1eady trong n\u01b0\u1edbc bi\u1ec3n v\u00ec sao l\u1ea1i c\u00f3 nhi\u1ec1u t\u00fai nilon \u0111\u1ebfn th\u1ebf? T\u1eeb l\u00e2u, ng\u01b0\u1eddi ta xem bi\u1ec3n r\u1ed9ng m\u00eanh m\u00f4ng l\u00e0 th\u00f9ng r\u00e1c kh\u00f4ng \u0111\u00e1y, v\u00ec v\u1eady h\u1ecd t\u00f9y ti\u1ec7n v\u1ee9t \u0111\u1ee7 ph\u1ebf th\u1ea3i xu\u1ed1ng bi\u1ec3n. Trong r\u00e1c th\u1ea3i \u0111\u00f3 c\u00f3 c\u1ea3 nh\u1eefng ch\u1ebf ph\u1ea9m nilon s\u1eed d\u1ee5ng th\u01b0\u1eddng ng\u00e0y. Ch\u1ebf ph\u1ea9m nilon m\u1ed9t khi b\u1ecb ng\u01b0\u1eddi ta bi\u1ebfn th\u00e0nh r\u00e1c th\u1ea3i th\u00ec r\u1ea5t kh\u00f3 x\u1eed l\u00ed. C\u00e1c ch\u1ebf ph\u1ea9m b\u1eb1ng nh\u1ef1a n\u1ebfu ch\u00f4n xu\u1ed1ng \u0111\u1ea5t, ph\u1ea3i tr\u1ea3i qua 150 n\u0103m m\u1edbi b\u1ecb ph\u00e2n h\u1ee7y. Trong th\u1eddi gian \u0111\u00f3, c\u00e1c ch\u1ea5t c\u00f3 h\u1ea1i s\u1ebd t\u1eeb trong b\u00e3i r\u00e1c g\u00e2y ra \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng. N\u1ebfu v\u1ee9t t\u00fai nilon xu\u1ed1ng bi\u1ec3n th\u00ec ph\u1ea3i c\u1ea7n \u0111\u1ebfn 200 n\u0103m m\u1edbi \u0111\u01b0\u1ee3c ph\u00e2n h\u1ee7y.<\/p>\n\n\n\n
Ng\u01b0\u1eddi ta g\u1ecdi s\u1ef1 \u00f4 nhi\u1ec5m t\u00fai nilon l\u00e0 \u201c\u00f4 nhi\u1ec5m m\u00e0u tr\u1eafng\u201d. S\u1ef1 ki\u1ec7n r\u00f9a bi\u1ec3n ch\u1ebft h\u00e0ng lo\u1ea1t ch\u1ee9ng t\u1ecf \u00f4 nhi\u1ec5m m\u00e0u tr\u1eafng \u0111\u00e3 \u1ea3nh h\u01b0\u1edfng nghi\u00eam tr\u1ecdng \u0111\u1ebfn m\u00f4i tr\u01b0\u1eddng bi\u1ec3n v\u00e0 g\u00e2y n\u00ean h\u1eadu qu\u1ea3 nghi\u00eam tr\u1ecdng. Mu\u1ed1n ng\u0103n ng\u1eeba th\u1ea3m k\u1ecbch n\u00e0y t\u00e1i di\u1ec5n, tr\u01b0\u1edbc h\u1ebft ph\u1ea3i b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng bi\u1ec3n, kh\u00f4ng t\u00f9y ti\u1ec7n v\u1ee9t r\u00e1c xu\u1ed1ng bi\u1ec3n. Sau n\u1eefa l\u00e0 ph\u1ea3i h\u1ea1n ch\u1ebf d\u00f9ng \u0111\u1ed3 nh\u1ef1a v\u00e0 t\u00fai nilon, ho\u1eb7c nghi\u00ean c\u1ee9u, khai th\u00e1c v\u00e0 ch\u1ebf t\u1ea1o nh\u1eefng ch\u1ebf ph\u1ea9m nilon trong m\u1ed9t th\u1eddi gian ng\u1eafn s\u1ebd t\u1ef1 ph\u00e2n h\u1ee7y.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: Bi\u1ec3n; \u00d4 nhi\u1ec5m m\u00e0u tr\u1eafng; R\u00f9a bi\u1ec3n.<\/p>\n","protected":false},"excerpt":{"rendered":"
N\u0103m 1983, nhi\u1ec1u n\u01a1i tr\u00ean th\u1ebf gi\u1edbi ng\u01b0\u1eddi ta b\u1ed7ng ph\u00e1t hi\u1ec7n th\u1ea5y r\u00f9a bi\u1ec3n ch\u1ebft h\u00e0ng lo\u1ea1t. C\u00f3 ph\u1ea3i v\u00ec ch\u00fang thi\u1ebfu th\u1ee9c \u0103n n\u00ean b\u1ecb ch\u1ebft \u0111\u00f3i kh\u00f4ng? Hi\u1ec7n t\u01b0\u1ee3ng r\u00f9a bi\u1ec3n ch\u1ebft h\u00e0ng lo\u1ea1t k\u00ec l\u1ea1 n\u00e0y \u0111\u00e3 g\u00e2y s\u1ef1 ch\u00fa \u00fd cho c\u00e1c nh\u00e0 khoa h\u1ecdc. Qua \u0111i\u1ec1u tra nghi\u00ean c\u1ee9u […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,17],"tags":[],"class_list":["post-9508","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-moi-truong"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9508","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=9508"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9508\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=9508"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=9508"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=9508"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}