{"id":7836,"date":"2017-11-16T01:13:11","date_gmt":"2017-11-15T18:13:11","guid":{"rendered":"http:\/\/ttud.com.vn\/?p=7836"},"modified":"2017-12-04T01:14:13","modified_gmt":"2017-12-03T18:14:13","slug":"cam-bien-moi-xac-dinh-thoi-diem-cay-o-trong-dieu-kien-kho-han","status":"publish","type":"post","link":"https:\/\/casta.ttud.com.vn\/index.php\/cam-bien-moi-xac-dinh-thoi-diem-cay-o-trong-dieu-kien-kho-han\/","title":{"rendered":"C\u1ea3m bi\u1ebfn m\u1edbi x\u00e1c \u0111\u1ecbnh th\u1eddi \u0111i\u1ec3m c\u00e2y \u1edf trong \u0111i\u1ec1u ki\u1ec7n kh\u00f4 h\u1ea1n"},"content":{"rendered":"

\"alt\"<\/p>\n

C\u00e1c k\u1ef9 s\u01b0 t\u1ea1i Vi\u1ec7n C\u00f4ng ngh\u1ec7 Massachusetts (MIT) \u0111\u00e3 ch\u1ebf t\u1ea1o \u0111\u01b0\u1ee3c lo\u1ea1i c\u1ea3m bi\u1ebfn c\u00f3 th\u1ec3 in tr\u00ean l\u00e1 c\u00e2y v\u00e0 ti\u1ebft l\u1ed9 th\u1eddi \u0111i\u1ec3m c\u00e2y b\u1ecb thi\u1ebfu n\u01b0\u1edbc. C\u00f4ng ngh\u1ec7 n\u00e0y kh\u00f4ng ch\u1ec9 gi\u00fap c\u1ee9u s\u1ed1ng c\u00e2y tr\u1ed3ng b\u1ecb b\u1ecf qu\u00ean m\u00e0 quan tr\u1ecdng h\u01a1n l\u00e0 c\u1ea3nh b\u00e1o s\u1edbm cho n\u00f4ng d\u00e2n khi n\u00e0o c\u00e2y tr\u1ed3ng b\u1ecb nguy hi\u1ec3m.<\/p>\n

Michael Strano, Gi\u00e1o s\u01b0 v\u1ec1 K\u1ef9 thu\u1eadt h\u00f3a h\u1ecdc v\u00e0 l\u00e0 \u0111\u1ed3ng t\u00e1c gi\u1ea3 nghi\u00ean c\u1ee9u \u0111\u00e3 ph\u1ed1i h\u1ee3p v\u1edbi m\u1ed9t c\u00f4ng ty n\u00f4ng nghi\u1ec7p \u0111\u1ec3 ch\u1ebf t\u1ea1o c\u1ea3m bi\u1ebfn s\u1eed d\u1ee5ng cho c\u00e2y tr\u1ed3ng v\u00e0 tin r\u1eb1ng c\u00f4ng ngh\u1ec7 n\u00e0y c\u0169ng s\u1ebd h\u1eefu \u00edch cho ng\u01b0\u1eddi l\u00e0m v\u01b0\u1eddn v\u00e0 \u201cng\u01b0\u1eddi d\u00e2n n\u00f4ng d\u00e2n\u201d \u0111\u00f4 th\u1ecb. C\u00f4ng ngh\u1ec7 c\u0169ng c\u00f3 th\u1ec3 gi\u00fap c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u ph\u00e1t tri\u1ec3n nh\u1eefng ph\u01b0\u01a1ng th\u1ee9c m\u1edbi \u0111\u1ec3 t\u1ea1o ra c\u00e1c gi\u1ed1ng c\u00e2y tr\u1ed3ng ch\u1ecbu h\u1ea1n.<\/p>\n

C\u1ea3m bi\u1ebfn in<\/em><\/strong><\/p>\n

Khi \u0111\u1ea5t kh\u00f4, c\u00e2y tr\u1ed3ng s\u1ebd ph\u00e1t tri\u1ec3n ch\u1eadm, ho\u1ea1t \u0111\u1ed9ng quang h\u1ee3p c\u1ee7a c\u00e2y gi\u1ea3m v\u00e0 khi\u1ebfn cho m\u00f4 b\u1ecb t\u1ed5n th\u01b0\u01a1ng. M\u1ed9t s\u1ed1 c\u00e2y tr\u1ed3ng b\u1eaft \u0111\u1ea7u h\u00e9o, nh\u01b0ng m\u1ed9t s\u1ed1 kh\u00e1c l\u1ea1i kh\u00f4ng c\u00f3 d\u1ea5u hi\u1ec7u g\u1eb7p r\u1eafc r\u1ed1i cho \u0111\u1ebfn khi ch\u00fang b\u1ecb t\u1ed5n th\u01b0\u01a1ng n\u1eb7ng.<\/p>\n

C\u1ea3m bi\u1ebfn m\u1edbi t\u1eadn d\u1ee5ng c\u00e1c kh\u00ed h\u1ed5ng c\u1ee7a c\u00e2y – c\u00e1c l\u1ed7 nh\u1ecf tr\u00ean m\u1eb7t l\u00e1 cho ph\u00e9p n\u01b0\u1edbc b\u1ed1c h\u01a1i. Khi n\u01b0\u1edbc b\u1ed1c h\u01a1i t\u1eeb l\u00e1, \u00e1p l\u1ef1c n\u01b0\u1edbc trong c\u00e2y gi\u1ea3m, cho ph\u00e9p c\u00e2y h\u00fat n\u01b0\u1edbc t\u1eeb \u0111\u1ea5t th\u00f4ng qua qu\u00e1 tr\u00ecnh g\u1ecdi l\u00e0 tho\u00e1t h\u01a1i n\u01b0\u1edbc. C\u00e1c nh\u00e0 sinh v\u1eadt h\u1ecdc th\u1ef1c v\u1eadt \u0111\u1ec1u bi\u1ebft r\u1eb1ng kh\u00ed kh\u1ed5ng m\u1edf ra khi ti\u1ebfp x\u00fac v\u1edbi \u00e1nh s\u00e1ng v\u00e0 kh\u00e9p l\u1ea1i trong \u0111i\u1ec1u ki\u1ec7n b\u00f3ng t\u1ed1i, nh\u01b0ng \u0111\u1eb7c tr\u01b0ng n\u00e0y \u00edt \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u v\u00ec ch\u01b0a c\u00f3 ph\u01b0\u01a1ng th\u1ee9c n\u00e0o hi\u1ec7u qu\u1ea3 \u0111\u1ec3 tr\u1ef1c ti\u1ebfp \u0111o \u0111\u1ea1c trong th\u1eddi gian th\u1ef1c.<\/p>\n

\u0110\u1ec3 ch\u1ebf t\u1ea1o c\u1ea3m bi\u1ebfn, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u \u0111\u00e3 s\u1eed d\u1ee5ng m\u1ef1c in \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb \u1ed1ng nano cacbon – \u1ed1ng cacbon nh\u1ecf r\u1ed7ng d\u1eabn \u0111i\u1ec7n – h\u00f2a tan trong h\u1ee3p ch\u1ea5t h\u1eefu c\u01a1 sodium dodecyl sulfate, kh\u00f4ng g\u00e2y t\u1ed5n h\u1ea1i cho kh\u00ed kh\u1ed5ng. M\u1ef1c c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c in tr\u00ean m\u1ed9t l\u1ed7 r\u1ed7ng \u0111\u1ec3 t\u1ea1o ra m\u1ea1ch \u0111i\u1ec7n t\u1eed. Khi l\u1ed7 r\u1ed7ng kh\u00e9p l\u1ea1i, m\u1ea1ch v\u1eabn kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng v\u00e0 c\u00f3 th\u1ec3 \u0111o d\u00f2ng \u0111i\u1ec7n b\u1eb1ng c\u00e1ch k\u1ebft n\u1ed1i m\u1ea1ch v\u1edbi \u0111a n\u0103ng k\u1ebf. Khi l\u1ed7 r\u1ed7ng m\u1edf ra, m\u1ea1ch h\u1ecfng v\u00e0 d\u00f2ng \u0111i\u1ec7n b\u1ecb ng\u1eaft, cho ph\u00e9p c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u x\u00e1c \u0111\u1ecbnh r\u1ea5t ch\u00ednh x\u00e1c th\u1eddi \u0111i\u1ec3m l\u1ed7 r\u1ed7ng m\u1edf ra ho\u1eb7c kh\u00e9p l\u1ea1i.<\/p>\n

Th\u00f4ng qua x\u00e1c \u0111\u1ecbnh chu k\u1ef3 m\u1edf v\u00e0 kh\u00e9p c\u1ee7a l\u1ed7 r\u1ed7ng trong v\u00e0i ng\u00e0y \u1edf \u0111i\u1ec1u ki\u1ec7n b\u00ecnh th\u01b0\u1eddng v\u00e0 kh\u00f4, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n ra th\u1eddi \u0111i\u1ec3m c\u00e2y tr\u1ea3i qua t\u00ecnh tr\u1ea1ng thi\u1ebfu n\u01b0\u1edbc di\u1ec5n ra trong hai ng\u00e0y. M\u1ea5t \u0111\u1ebfn 7 ph\u00fat \u0111\u1ec3 kh\u00ed kh\u1ed5ng m\u1edf ra sau khi ti\u1ebfp x\u00fac v\u1edbi \u00e1nh s\u00e1ng v\u00e0 c\u1ea7n c\u00f3 53 ph\u00fat \u0111\u1ec3 kh\u00ed kh\u1ed5ng kh\u00e9p l\u1ea1i khi c\u00f3 t\u00e1c \u0111\u1ed9ng c\u1ee7a b\u00f3ng t\u1ed1i, nh\u01b0ng nh\u1eefng ph\u1ea3n \u1ee9ng n\u00e0y thay \u0111\u1ed5i trong \u0111i\u1ec1u ki\u1ec7n kh\u00f4 h\u1ea1n. Khi c\u00e2y tr\u1ed3ng b\u1ecb thi\u1ebfu n\u01b0\u1edbc, kh\u00ed kh\u1ed5ng m\u1ea5t trung b\u00ecnh 25 ph\u00fat \u0111\u1ec3 m\u1edf ra, trong khi th\u1eddi gian kh\u00e9p l\u1ea1i gi\u1ea3m c\u00f2n 45 ph\u00fat.<\/p>\n

Michael McAlpine, Ph\u00f3 gi\u00e1o s\u01b0 k\u1ef9 thu\u1eadt c\u01a1 kh\u00ed t\u1ea1i tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc Minnesota cho r\u1eb1ng: \u0110\u00e2y l\u00e0 nghi\u00ean c\u1ee9u th\u00fa v\u1ecb v\u00ec m\u1edf ra kh\u1ea3 n\u0103ng in tr\u1ef1c ti\u1ebfp c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed l\u00ean th\u1ef1c v\u1eadt \u0111\u1ec3 theo d\u00f5i l\u00e2u d\u00e0i c\u00e1c ph\u1ea3n \u1ee9ng sinh l\u00fd th\u1ef1c v\u1eadt \u0111\u1ed1i v\u1edbi c\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng nh\u01b0 h\u1ea1n h\u00e1n.<\/p>\n

C\u1ea3nh b\u00e1o kh\u00f4 h\u1ea1n<\/em><\/strong><\/p>\n

Nh\u00f3m nghi\u00ean c\u1ee9u \u0111\u00e3 th\u1eed nghi\u1ec7m c\u00e1c c\u1ea3m bi\u1ebfn tr\u00ean c\u00e2y hoa loa k\u00e8n v\u00ec lo\u00e0i hoa n\u00e0y c\u00f3 kh\u00ed kh\u1ed5ng l\u1edbn. \u0110\u1ec3 in m\u1ef1c v\u00e0o l\u00e1 c\u00e2y, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u \u0111\u00e3 t\u1ea1o ra m\u1ed9t khu\u00f4n in c\u00f3 r\u00e3nh vi l\u01b0u. Khi khu\u00f4n \u0111\u01b0\u1ee3c \u0111\u1eb7t tr\u00ean l\u00e1, m\u1ef1c ch\u1ea3y qua r\u00e3nh \u0111\u01b0\u1ee3c l\u1eafng \u0111\u1ecdng tr\u00ean b\u1ec1 m\u1eb7t l\u00e1.<\/p>\n

C\u00e1c nh\u00e0 khoa h\u1ecdc hi\u1ec7n \u0111ang nghi\u00ean c\u1ee9u m\u1ed9t ph\u01b0\u01a1ng th\u1ee9c m\u1edbi \u0111\u1ec3 t\u1ea1o ra c\u00e1c m\u1ea1ch \u0111i\u1ec7n t\u1eed ch\u1ec9 b\u1eb1ng c\u00e1ch g\u1eafn nh\u00e3n d\u00e1n tr\u00ean b\u1ec1 m\u1eb7t l\u00e1. Ngo\u00e0i c\u00e1c c\u00f4ng ty n\u00f4ng nghi\u1ec7p quy m\u00f4 l\u1edbn, ng\u01b0\u1eddi l\u00e0m v\u01b0\u1eddn v\u00e0 ng\u01b0\u1eddi n\u00f4ng d\u00e2n \u0111\u00f4 th\u1ecb c\u00f3 th\u1ec3 s\u1ebd quan t\u00e2m \u0111\u1ebfn thi\u1ebft b\u1ecb n\u00e0y. B\u00ean c\u1ea1nh \u0111\u00f3, nh\u00f3m nghi\u00ean c\u1ee9u \u0111ang kh\u00e1m ph\u00e1 ra ph\u01b0\u01a1ng th\u1ee9c ch\u1ebf t\u1ea1o lo\u1ea1i c\u1ea3m bi\u1ebfn n\u00e0y \u0111\u1ec3 ph\u00e1t hi\u1ec7n \u00e1nh s\u00e1ng v\u00e0 ch\u1ee5p \u1ea3nh, gi\u1ed1ng nh\u01b0 m\u00e1y \u1ea3nh.<\/p>\n

(Vista)<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00e1c k\u1ef9 s\u01b0 t\u1ea1i Vi\u1ec7n C\u00f4ng ngh\u1ec7 Massachusetts (MIT) \u0111\u00e3 ch\u1ebf t\u1ea1o \u0111\u01b0\u1ee3c lo\u1ea1i c\u1ea3m bi\u1ebfn c\u00f3 th\u1ec3 in tr\u00ean l\u00e1 c\u00e2y v\u00e0 ti\u1ebft l\u1ed9 th\u1eddi \u0111i\u1ec3m c\u00e2y b\u1ecb thi\u1ebfu n\u01b0\u1edbc. C\u00f4ng ngh\u1ec7 n\u00e0y kh\u00f4ng ch\u1ec9 gi\u00fap c\u1ee9u s\u1ed1ng c\u00e2y tr\u1ed3ng b\u1ecb b\u1ecf qu\u00ean m\u00e0 quan tr\u1ecdng h\u01a1n l\u00e0 c\u1ea3nh b\u00e1o s\u1edbm cho n\u00f4ng d\u00e2n […]<\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[],"class_list":["post-7836","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\/7836","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\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/comments?post=7836"}],"version-history":[{"count":1,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/7836\/revisions"}],"predecessor-version":[{"id":7837,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/7836\/revisions\/7837"}],"wp:attachment":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/media?parent=7836"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/categories?post=7836"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/tags?post=7836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}