{"id":35165,"date":"2017-11-01T08:02:42","date_gmt":"2017-11-01T05:02:42","guid":{"rendered":"http:\/\/btv.md\/?p=35165"},"modified":"2017-11-02T13:07:43","modified_gmt":"2017-11-02T10:07:43","slug":"bacteriile-au-simt-tactil","status":"publish","type":"post","link":"https:\/\/www.btv.md\/ro\/bacteriile-au-simt-tactil\/","title":{"rendered":"Bacteriile au ,,sim\u0163 tactil\u201d"},"content":{"rendered":"<p><strong>De\u015fi bacteriile nu au un sistem senzorial acestea pot sim\u0163i mediul \u00een care se afl\u0103. Un grup de cercet\u0103tori din cadrul Universit\u0103\u0163ii din Basel au descoperit nu doar c\u0103 bacteriile pot r\u0103spunde la semnale chimice, dar posed\u0103 \u015fi sim\u0163ul tactil. Astfel c\u0103 cercet\u0103torii au demonstrat modul \u00een care bacteria poate recunoa\u015fte suprafa\u0163a pe care se afl\u0103 \u00een doar c\u00e2teva secunde. Acela\u015fi mecanism este utilizat \u015fi de patogeni pentru colonizarea \u015fi atacarea celulelor gazd\u0103, scrie descoper\u0103.ro<\/strong><\/p>\n<p>\u00cenveli\u015ful intestinal, mucoasa sau suprafa\u0163a corpului reprezint\u0103 c\u0103i de acces pentru germenii patogeni. Conform\u00a0<a href=\"http:\/\/www.sciencedaily.com\/releases\/2017\/10\/171026142320.htm\">Science Daily<\/a>, dup\u0103 doar c\u00e2teva secunde de la atingerea locului,\u00a0<a href=\"http:\/\/www.descopera.ro\/stiinta\/16388628-o-bacterie-necunoscuta-pe-terra-descoperita-la-bordul-statiei-spatiale-internationale\">bacteriile\u00a0<\/a>\u00eencep s\u0103 infecteze \u0163esuturile. Unii patogeni utilizeaz\u0103 stimularea mecanic\u0103 ca un declan\u015fator, pentru a ob\u0163ine capacitatea de distrugere a \u0163esutului gazdei.\u00a0<\/p>\n<p>\u00cen prezent, prof. Urs Jenal, din cadrul Universit\u0103\u0163ii din Basel, a descoperit \u015fi modul \u00een care bacteriile simt c\u00e2nd se afl\u0103 pe o anumit\u0103 suprafa\u0163\u0103 \u015fi ce se \u00eent\u00e2mpl\u0103 \u00een doar c\u00e2teva secunde. \u00cen ultimii 10 ani, cercet\u0103torii au realizat un proges uria\u015f privind modul \u00een care bacteriile percep \u015fi proceseaz\u0103 semnalele chimice. &#8221;\u00cens\u0103 \u015ftim foarte pu\u0163ine detalii despre modul \u00een care bacteriile r\u0103spund la stimulii mecanici, precum \u015fi privind modul \u00een care ace\u015ftia schimb\u0103 comportamentul bacteriilor. Prin utilizarea\u00a0Caulobacter crescentus, ca model, echipa a reu\u015fit s\u0103 dovedeasc\u0103 pentru prima oar\u0103 c\u0103 bacteria are &lt;&lt;sim\u0163\u00a0<a href=\"http:\/\/www.descopera.ro\/dnews\/8348205-protezele-ce-permit-pacientilor-sa-simta-atingerile-devin-realitate\">tactil<\/a>&gt;&gt;. Acest mecanism le ajut\u0103 s\u0103 recunoasc\u0103 anumite suprafe\u0163e \u015fi s\u0103 induc\u0103 producerea propriilor celule,&#8221; a declarat Jenal.\u00a0<\/p>\n<p>Bacteria Caulobacter are un rotor care se rote\u015fte \u00een interiorul celulei cu o protuberan\u0163\u0103 alungit\u0103, numit\u0103 flagel. Astfel rotarea flagelului ajut\u0103 bacteria s\u0103 se mi\u015fte \u00een lichid. \u00cens\u0103 rotorul are un dublu rol, cel de organ mecanic stimulator. Rota\u0163ia motorie este alimentat\u0103 de fluxul de protoni dn celul\u0103. C\u00e2nd aceste celule ating suprafa\u0163a, fluxul de protoni este \u00eentrerupt.\u00a0<\/p>\n<p>Cercet\u0103torii consider\u0103 c\u0103 acesta este semnalul care ajut\u0103 bacteria s\u0103 determine pe ce suprafa\u0163\u0103 se afl\u0103. &#8221;De\u015fi bacteria\u00a0Caulobacter este inofensiv\u0103, descoperirea ne poate ajuta s\u0103 \u00een\u0163elegem mecanismul bolilor infec\u0163ioase,&#8221; a declarat Jenal.\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>De\u015fi bacteriile nu au un sistem senzorial acestea pot sim\u0163i mediul \u00een care se afl\u0103. Un grup de cercet\u0103tori din cadrul Universit\u0103\u0163ii din Basel au descoperit nu doar c\u0103 bacteriile pot r\u0103spunde la semnale chimice, dar posed\u0103 \u015fi sim\u0163ul tactil. Astfel c\u0103 cercet\u0103torii au demonstrat modul \u00een care bacteria poate recunoa\u015fte suprafa\u0163a pe care se [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":35171,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6354],"tags":[],"class_list":["post-35165","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-externe-ro"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Bacteriile au ,,sim\u0163 tactil\u201d<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.btv.md\/ro\/bacteriile-au-simt-tactil\/\" \/>\n<meta property=\"og:locale\" content=\"ro_RO\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bacteriile au ,,sim\u0163 tactil\u201d\" \/>\n<meta property=\"og:description\" content=\"De\u015fi bacteriile nu au un sistem senzorial acestea pot sim\u0163i mediul \u00een care se afl\u0103. Un grup de cercet\u0103tori din cadrul Universit\u0103\u0163ii din Basel au descoperit nu doar c\u0103 bacteriile pot r\u0103spunde la semnale chimice, dar posed\u0103 \u015fi sim\u0163ul tactil. 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