Broa\u0219tele sunt creaturi fascinante, cu adapt\u0103ri unice care le permit s\u0103 prospere at\u00e2t \u00een medii acvatice, c\u00e2t \u0219i terestre. Una dintre cele mai remarcabile tr\u0103s\u0103turi ale lor este limba lor lipicioas\u0103, pe care o folosesc pentru a captura insecte cu o precizie \u0219i o eficien\u021b\u0103 incredibile.<\/p>\n\n
Secretul din spatele lipiciunii limbii broa\u0219tei st\u0103 \u00een saliva sa, care are propriet\u0103\u021bi fizice neobi\u0219nuite. Spre deosebire de fluidele newtoniene obi\u0219nuite, care se comport\u0103 constant \u00een condi\u021bii diferite, saliva broa\u0219tei este un fluid nenewtonian. Aceasta \u00eenseamn\u0103 c\u0103 v\u00e2scozitatea sa, sau rezisten\u021ba la curgere, se schimb\u0103 \u00een func\u021bie de for\u021bele care ac\u021bioneaz\u0103 asupra ei.<\/p>\n\n
C\u00e2nd limba broa\u0219tei love\u0219te o insect\u0103, impactul face ca saliva s\u0103 se sub\u021bieze, permi\u021b\u00e2ndu-i s\u0103 se r\u0103sp\u00e2ndeasc\u0103 \u00een jurul pr\u0103zii ca un lichid. Aceast\u0103 saliv\u0103 sub\u021bire ajut\u0103 limba s\u0103 intre \u00een contact cu o suprafa\u021b\u0103 mai mare, cresc\u00e2nd for\u021ba adeziv\u0103.<\/p>\n\n
Pe m\u0103sur\u0103 ce limba se retrage, saliva se \u00eengroa\u0219\u0103 din nou \u00eentr-o substan\u021b\u0103 asem\u0103n\u0103toare cu lipiciul, ata\u0219\u00e2nd ferm insecta de limb\u0103. Aceast\u0103 proprietate reversibil\u0103 a salivei \u00eei permite broa\u0219tei s\u0103 captureze \u0219i s\u0103 consume cu u\u0219urin\u021b\u0103 prada.<\/p>\n\n
Pe l\u00e2ng\u0103 saliva sa nenewtonian\u0103, \u00eens\u0103\u0219i limba broa\u0219tei joac\u0103 un rol crucial \u00een capturarea insectelor. Limbile broa\u0219telor sunt excep\u021bional de moi \u0219i elastice, ceea ce le permite s\u0103 se deformeze \u0219i s\u0103 se conformeze formei insectei pe care o \u021bintesc. Aceast\u0103 suprafa\u021b\u0103 de contact crescut\u0103 spore\u0219te \u0219i mai mult for\u021ba adeziv\u0103 a salivei.<\/p>\n\n
Combina\u021bia dintre limba moale \u0219i saliva nenewtonian\u0103 creeaz\u0103 un mecanism foarte eficient pentru capturarea insectelor. Saliva sub\u021bire permite limbii s\u0103 stabileasc\u0103 un prim contact, \u00een timp ce saliva care se \u00eengroa\u0219\u0103 asigur\u0103 o prindere sigur\u0103 a pr\u0103zii.<\/p>\n\n
Propriet\u0103\u021bile unice ale salivei de broasc\u0103 au determinat cercet\u0103torii s\u0103 exploreze aplica\u021bii poten\u021biale \u00een dezvoltarea de noi adezivi. Ace\u0219ti adezivi ar putea avea o gam\u0103 larg\u0103 de utiliz\u0103ri, de la plicuri resigilabile la dispozitive medicale care necesit\u0103 o aderen\u021b\u0103 puternic\u0103 \u0219i reversibil\u0103.<\/p>\n\n
\u00cen\u021beleg\u00e2nd mecanismele care stau la baza aderen\u021bei limbii broa\u0219tei, oamenii de \u0219tiin\u021b\u0103 sper\u0103 s\u0103 creeze adezivi sintetici care s\u0103 imite propriet\u0103\u021bile remarcabile ale salivei broa\u0219tei. Ace\u0219ti adezivi ar putea avea implica\u021bii semnificative pentru industrii precum ambalarea, produc\u021bia \u0219i asisten\u021ba medical\u0103.<\/p>\n\n
Broa\u0219tele sunt doar un exemplu dintre numeroasele adapt\u0103ri uimitoare g\u0103site \u00een lumea amfibienilor. Amfibienii au evoluat o gam\u0103 divers\u0103 de tr\u0103s\u0103turi fizice \u0219i comportamentale care le permit s\u0103 supravie\u021buiasc\u0103 \u00eentr-o gam\u0103 larg\u0103 de habitate, de la p\u0103duri tropicale umede p\u00e2n\u0103 la de\u0219erturi aride.<\/p>\n\n
Studiul limbilor broa\u0219telor \u0219i al altor adapt\u0103ri ale amfibienilor nu numai c\u0103 ofer\u0103 informa\u021bii despre lumea natural\u0103, ci \u0219i inspir\u0103 noi tehnologii \u0219i progrese \u00een domenii precum \u0219tiin\u021ba materialelor \u0219i inginerie.<\/p>","protected":false},"excerpt":{"rendered":"
Limba broa\u0219tei: Arma secret\u0103 pentru capturarea insectelor Broa\u0219tele sunt creaturi fascinante, cu adapt\u0103ri unice care le permit s\u0103 prospere at\u00e2t \u00een medii acvatice, c\u00e2t \u0219i terestre. Una dintre cele mai…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[280],"tags":[332,333,329,330,334,331,328],"class_list":["post-116","post","type-post","status-publish","format-standard","hentry","category-zoology","tag-adhesion","tag-amphibians","tag-insect-capture","tag-non-newtonian-fluids","tag-nature-innovation","tag-soft-tongues","tag-frog-tongues"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts\/116","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/comments?post=116"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts\/116\/revisions"}],"predecessor-version":[{"id":117,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/posts\/116\/revisions\/117"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/media?parent=116"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/categories?post=116"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/ro\/wp-json\/wp\/v2\/tags?post=116"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}