{"id":892,"date":"2019-12-24T07:00:50","date_gmt":"2019-12-24T00:00:50","guid":{"rendered":"http:\/\/www.truyenthong.edu.vn\/?p=892"},"modified":"2019-12-24T07:00:50","modified_gmt":"2019-12-24T00:00:50","slug":"khi-ca-chua-va-cay-thuoc-la-bi-cat-se-phat-ra-tieng-khoc","status":"publish","type":"post","link":"https:\/\/truyenthong.edu.vn\/sanpham\/2019\/12\/24\/khi-ca-chua-va-cay-thuoc-la-bi-cat-se-phat-ra-tieng-khoc\/","title":{"rendered":"Khi c\u00e0 chua v\u00e0 c\u00e2y thu\u1ed1c l\u00e1 b\u1ecb c\u1eaft s\u1ebd ph\u00e1t ra ti\u1ebfng kh\u00f3c"},"content":{"rendered":"\n<p><strong>Trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y, c\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 ph\u00e1t hi\u1ec7n ra r\u1eb1ng th\u1ef1c v\u1eadt c\u00f3 kh\u1ea3 n\u0103ng nghe, nh\u00ecn v\u00e0 ng\u1eedi. Th\u1eadm ch\u00ed khi th\u1ef1c v\u1eadt b\u1ecb m\u1ea5t n\u01b0\u1edbc ho\u1eb7c th\u00e2n r\u1ec5 b\u1ecb c\u1eaft \u0111\u1ee9t, ch\u00fang kh\u00f4ng ch\u1ec9 t\u1ecf ra c\u0103ng th\u1eb3ng m\u00e0 c\u00f2n ph\u00e1t \u00e2m thanh r\u00ean r\u1ec9 trong kh\u00f4ng kh\u00ed.<\/strong><\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.dkn.tv\/wp-content\/uploads\/2019\/12\/dainu.jpg\" alt=\"\" width=\"358\" height=\"187\"\/><figcaption>\u1ea2nh minh ho\u1ea1 (ngu\u1ed3n: New Scientist).<\/figcaption><\/figure><\/div>\n\n\n<!--more-->\n\n\n<p>Theo&nbsp;<em>New Scientist<\/em>&nbsp;\u0111\u01b0a tin, nh\u00f3m nghi\u00ean c\u1ee9u c\u1ee7a \u0110\u1ea1i h\u1ecdc Tel Aviv (Tel Aviv University) \u1edf Israel, g\u1ea7n \u0111\u00e2y \u0111\u00e3 s\u1eed d\u1ee5ng c\u00e1c d\u1ee5ng c\u1ee5 \u0111\u1ec3 l\u00e0m th\u00ed nghi\u1ec7m v\u1edbi c\u00e0 chua v\u00e0 c\u00e2y thu\u1ed1c l\u00e1. Hai lo\u1ea1i th\u1ef1c v\u1eadt n\u00e0y \u0111\u01b0\u1ee3c l\u00e0m th\u00ed nghi\u1ec7m m\u1ed9t c\u00e1ch \u0111\u1ed9c l\u1eadp trong t\u00ecnh tr\u1ea1ng kh\u00f4ng c\u00f3 n\u01b0\u1edbc v\u00e0 b\u1ecb c\u1eaft r\u1ec5. \u0110\u1ed1i v\u1edbi c\u00e1c s\u00f3ng \u00e2m thanh ph\u00e1t ra, ng\u01b0\u1eddi th\u1eed nghi\u1ec7m \u0111\u1eb7t micr\u00f4 c\u00e1ch th\u1ef1c v\u1eadt 10cm v\u00e0 cu\u1ed1i c\u00f9ng ghi l\u1ea1i c\u00e1c s\u00f3ng \u00e2m thanh t\u1eeb 20 \u0111\u1ebfn 100 kilohertz (kHz).<\/p>\n\n\n<p>C\u00e1c nghi\u00ean c\u1ee9u \u0111\u00e3 ch\u1ec9 ra r\u1eb1ng, khi kh\u00f4ng c\u00f3 n\u01b0\u1edbc, c\u00e2y c\u00e0 chua ph\u00e1t ra t\u1ed5ng c\u1ed9ng 35 s\u00f3ng \u00e2m thanh m\u1ed7i gi\u1edd, trong khi c\u00e2y thu\u1ed1c l\u00e1 ph\u00e1t ra 11 \u00e2m thanh m\u1ed7i gi\u1edd. \u0110\u1ed1i v\u1edbi vi\u1ec7c th\u00e2n r\u1ec5 b\u1ecb c\u1eaft, c\u00e0 chua ph\u00e1t ra trung b\u00ecnh 25 ti\u1ebfng b\u00edp th\u1ea5p trong gi\u1edd ti\u1ebfp theo, trong khi c\u00e2y thu\u1ed1c l\u00e1 l\u00e0 15 l\u1ea7n. Ngo\u00e0i ra khi kh\u00f4ng c\u00f3 b\u1ea5t c\u1ee9 \u00e1p l\u1ef1c n\u00e0o, c\u00e1c lo\u00e0i th\u1ef1c v\u1eadt trung b\u00ecnh ph\u00e1t ra \u00e2m thanh th\u1ea5p \u00edt nh\u1ea5t 1 l\u1ea7n 1 gi\u1edd.<\/p>\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.dkn.tv\/wp-content\/uploads\/2019\/12\/na6.jpg\" alt=\"\" width=\"318\" height=\"215\"\/><figcaption>\u1ea2nh minh ho\u1ea1 (ngu\u1ed3n:&nbsp;<em>Ti\u1ec1n Phong<\/em>).<\/figcaption><\/figure><\/div>\n\n\n<p>Nh\u1eefng c\u00e2y n\u00e0y kh\u00f4ng ch\u1ec9 t\u1ef1 ph\u00e1t ra s\u00f3ng \u00e2m m\u00e0 th\u1eadm ch\u00ed c\u00f2n c\u00f3 th\u1ec3 nghe th\u1ea5y s\u00f3ng \u00e2m c\u1ee7a c\u00e1c c\u00e2y kh\u00e1c v\u00e0 ph\u1ea3n h\u1ed3i l\u1ea1i. Nh\u00f3m nghi\u00ean c\u1ee9u ch\u1ec9 ra r\u1eb1ng: \u201cCon ng\u01b0\u1eddi th\u01b0\u1eddng ngh\u0129 r\u1eb1ng th\u1ef1c v\u1eadt g\u1ea7n nh\u01b0 kh\u00f4ng c\u00f3 ti\u1ebfng n\u00f3i, nh\u01b0ng gi\u1edd \u0111\u00e2y nh\u1eefng ph\u00e1t hi\u1ec7n c\u1ee7a nghi\u00ean c\u1ee9u n\u00e0y \u0111\u00e3 thay \u0111\u1ed5i \u1ea5n t\u01b0\u1ee3ng c\u1ee7a ch\u00fang ta v\u1ec1 th\u1ef1c v\u1eadt\u201d.<\/p>\n\n\n<p>\u0110\u01b0\u1ee3c bi\u1ebft, ch\u1ec9 c\u00f3 \u0111\u1ed9ng v\u1eadt c\u00f3 v\u00fa v\u00e0 c\u00f4n tr\u00f9ng m\u1edbi c\u00f3 th\u1ec3 nghe th\u1ea5y s\u00f3ng \u00e2m thanh ph\u00e1t ra t\u1eeb th\u1ef1c v\u1eadt c\u00e1ch xa 5 m\u00e9t v\u00e0 h\u1ed3i \u0111\u00e1p l\u1ea1i. Con ng\u01b0\u1eddi kh\u00f4ng th\u1ec3 nghe \u0111\u01b0\u1ee3c s\u00f3ng \u00e2m c\u1ee7a th\u1ef1c v\u1eadt n\u1ebfu kh\u00f4ng c\u00f3 thi\u1ebft b\u1ecb h\u1ed7 tr\u1ee3.<\/p>\n\n\n<p>Tuy nhi\u00ean, nh\u00f3m nghi\u00ean c\u1ee9u c\u0169ng ti\u1ebft l\u1ed9 r\u1eb1ng, k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng v\u00e0o l\u0129nh v\u1ef1c n\u00f4ng nghi\u1ec7p trong t\u01b0\u01a1ng lai \u0111\u1ec3 gi\u00fap n\u00f4ng d\u00e2n hi\u1ec3u \u0111\u01b0\u1ee3c t\u00ecnh tr\u1ea1ng c\u1ee7a th\u1ef1c v\u1eadt th\u00f4ng qua s\u00f3ng \u00e2m.<\/p>\n\n\n<p>Link g\u1ed1c: <a href=\"https:\/\/www.dkn.tv\/doi-song\/nghien-cuu-phat-hien-khi-ca-chua-va-cay-thuoc-la-bi-cat-se-phat-ra-tieng-khoc.html\">https:\/\/www.dkn.tv\/doi-song\/nghien-cuu-phat-hien-khi-ca-chua-va-cay-thuoc-la-bi-cat-se-phat-ra-tieng-khoc.html<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y, c\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 ph\u00e1t hi\u1ec7n ra r\u1eb1ng th\u1ef1c v\u1eadt c\u00f3 kh\u1ea3 n\u0103ng nghe, nh\u00ecn v\u00e0 ng\u1eedi. Th\u1eadm ch\u00ed khi th\u1ef1c v\u1eadt b\u1ecb m\u1ea5t n\u01b0\u1edbc ho\u1eb7c th\u00e2n r\u1ec5 b\u1ecb c\u1eaft \u0111\u1ee9t, ch\u00fang kh\u00f4ng ch\u1ec9 t\u1ecf ra c\u0103ng th\u1eb3ng m\u00e0 c\u00f2n ph\u00e1t \u00e2m thanh r\u00ean r\u1ec9 trong kh\u00f4ng kh\u00ed.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[187,151],"class_list":["post-892","post","type-post","status-publish","format-standard","hentry","category-sinh-menh","tag-sinh-menh-4","tag-thuc-vat"],"_links":{"self":[{"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/posts\/892","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/comments?post=892"}],"version-history":[{"count":0,"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/posts\/892\/revisions"}],"wp:attachment":[{"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/media?parent=892"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/categories?post=892"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/tags?post=892"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}