{"id":237510,"date":"2026-07-27T07:21:08","date_gmt":"2026-07-27T07:21:08","guid":{"rendered":"https:\/\/www.europesays.com\/ee\/237510\/"},"modified":"2026-07-27T07:21:08","modified_gmt":"2026-07-27T07:21:08","slug":"korvitsakoortest-toidukile-hoidis-tomatid-varskena-tehnika","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/ee\/237510\/","title":{"rendered":"K\u00f5rvitsakoortest toidukile hoidis tomatid v\u00e4rskena | Tehnika"},"content":{"rendered":"

Jaapani ja Sri Lanka teadlastel \u00f5nnestus<\/a> valmistada k\u00f5rvitsakoortest uut t\u00fc\u00fcpi toidukilet. See aitas toidust eemal hoida nii UV-kiirgust kui ka baktereid.<\/p>\n

Mida teete teie tavaliselt k\u00f5rvitsakoortega p\u00e4rast seda, kui olete sisust supi v\u00f5i salati teinud? T\u00f5en\u00e4oliselt r\u00e4ndavad need komposti v\u00f5i pr\u00fcgikasti. Nagu aga n\u00fc\u00fcd selgub, peidavad need endas materjali, mis suudab asendada loodust reostavat plastkilet ja hoida toidu kauem v\u00e4rskena.<\/p>\n

Uus teadust\u00f6\u00f6 n\u00e4itab, et k\u00f5rvitsakoortest saab toota imepisikesi osakesi. Neid kasutades on v\u00f5imalik luua biolagunev pakkematerjal, mis t\u00f5rjub kahjulikku kiirgust ja baktereid ning pikendab m\u00e4rgatavalt viljade s\u00e4ilivusaega.<\/p>\n

Sellise nutika lahenduseni j\u00f5udsid Jaapani ja Sri Lanka teadlased, kes otsisid alternatiive naftap\u00f5histele plastpakenditele. Nad muutsid kuivatatud k\u00f5rvitsakoored kuumutamise abil mikroskoopilisteks s\u00fcsinikuosakesteks ehk kvantpunktideks. Osakesed segasid nad omakorda tselluloosist ja \u017eelatiinist koosnevasse looduslikku kilesse.<\/p>\n

Andmetest n\u00e4htus, et mida rohkem k\u00f5rvitsast saadud osakesi kilele lisati, seda tugevamaks ja t\u00f5husamaks see muutus. Uus materjal venis k\u00fcll tavalise biokilega v\u00f5rreldes veidi v\u00e4hem, kuid selle rebenemiskindlus kasvas lausa 147 protsenti.<\/p>\n

K\u00f5ige olulisemana selgus, et kolmeprotsendise osakeste sisaldusega kile suutis tagasi t\u00f5rjuda \u00fcle 94 protsendi UV-B kiirgusest. Samuti v\u00e4hendas see oluliselt bakterite kasvu.<\/p>\n

Niisuguse toime taga on osakeste eriline ehitus. Nimelt sisaldavad k\u00f5rvitsakoortest saadud s\u00fcsinikupunktid rohkelt pol\u00fcfenoole ja muid \u00fchendeid, mis suudavad neelata valgust ning v\u00e4hendada haigustekitajate eluj\u00f5udu. Lisaks seovad need osakesed end tugevalt tselluloosi ja \u017eelatiini molekulidega. See muudab kile vett t\u00f5rjuvamaks, nii et liigne niiskus ei p\u00e4\u00e4se toidule ligi.<\/p>\n

Soovides oma leiutist proovile panna, m\u00e4hkisid teadlased kilesse kirsstomatid ja j\u00e4tsid need kahek\u00fcmneks p\u00e4evaks seisma. Uues pakendis tomatid ei muutunud kohe pehmeks ja neis p\u00fcsis ka rohkem looduslikke suhkruid. Samal ajal kui tavalises kiles ja lahtiselt hoitud tomatitel hakkasid vohama mikroobid, hoidis k\u00f5rvitsakoortega rikastatud pakend need eemal. \u00dchtlasi kinnitasid inimrakkudel tehtud katsed, et v\u00e4iksema osakeste sisalduse korral on uus materjal ohutu.<\/p>\n

Kirsstomatid k\u00f5rvitsakoortest pakendis. Autor\/allikas: Kyushu University<\/p>\n

Tulemused ilmusid ajakirjas Food Research International<\/a>.<\/p>\n

Teadusuudised on Vikerraadios eetris esmasp\u00e4evast reedeni ca kell 8.35 ja laup\u00e4eval ca kell 8.25.<\/p>\n","protected":false},"excerpt":{"rendered":"Jaapani ja Sri Lanka teadlastel \u00f5nnestus valmistada k\u00f5rvitsakoortest uut t\u00fc\u00fcpi toidukilet. See aitas toidust eemal hoida nii UV-kiirgust…\n","protected":false},"author":2,"featured_media":237511,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_share_on_mastodon":"0"},"categories":[80],"tags":[26,27,37,33,35,34,36,31,32,21,52791,16727,14966,94554,28,29,95,19,9020,25,5596,94555,34723,36042,23,24,22,20,52790,30,92,93,94],"class_list":["post-237510","post","type-post","status-publish","format-standard","has-post-thumbnail","category-maailm","tag-breaking-news","tag-breakingnews","tag-ee","tag-eesti","tag-eesti-keel","tag-estonia","tag-estonian","tag-featured-news","tag-featurednews","tag-headlines","tag-jaagid","tag-korvits","tag-korvitsad","tag-korvitsakoor","tag-latest-news","tag-latestnews","tag-maailm","tag-news","tag-pakend","tag-populaarseimad-lood","tag-ringmajandus","tag-toidukile","tag-toiduraiskamine","tag-toit-sook","tag-top-stories","tag-topstories","tag-uldised-uudised","tag-uudised","tag-vaarindamine","tag-viimased-uudised","tag-world","tag-world-news","tag-worldnews"],"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@ee\/116990737571491976","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/posts\/237510","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/comments?post=237510"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/posts\/237510\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/media\/237511"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/media?parent=237510"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/categories?post=237510"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/tags?post=237510"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}