{"id":16465,"date":"2021-03-24T14:29:03","date_gmt":"2021-03-24T14:29:03","guid":{"rendered":"https:\/\/www.upjs.sk\/prirodovedecka-fakulta\/actual-news\/24489\/"},"modified":"2022-09-28T12:16:52","modified_gmt":"2022-09-28T12:16:52","slug":"24489","status":"publish","type":"cpt_aktualne_spravy","link":"https:\/\/www.upjs.sk\/prirodovedecka-fakulta\/actual-news\/24489\/","title":{"rendered":"Strieborn\u00e9 nano\u010dastice za vyu\u017eitia li\u0161ajn\u00edkov"},"content":{"rendered":"

Vedci z \u00dastavu geotechniky Slovenskej akad\u00e9mie vied a\u00a0Katedry botaniky \u00dastavu biologick\u00fdch a\u00a0ekologick\u00fdch vied Pr\u00edrodovedeckej fakulty Univerzity P.J. \u0160af\u00e1rika v Ko\u0161iciach<\/strong> dok\u00e1zali s vyu\u017eit\u00edm mechanoch\u00e9mie syntetizova\u0165 za pou\u017eitia li\u0161ajn\u00edkov<\/strong> strieborn\u00e9 nano\u010dastice kde v\u00fdrazne zv\u00fd\u0161ili \u00a0antibakteri\u00e1lnu aktivitu. Okrem toho prekonali probl\u00e9m s\u00a0nerozpustnos\u0165ou sekund\u00e1rnych metabolitov li\u0161ajn\u00edkov vo vode, \u010do br\u00e1nilo ich pou\u017eitiu na klasick\u00fa synt\u00e9zu. Ich inovat\u00edvny postup ocenili aj editori prest\u00ed\u017eneho vedeck\u00e9ho \u010dasopisu.<\/p>\n

Mechanoch\u00e9mia<\/strong> je druh chemickej synt\u00e9zy, ktor\u00e1 je environment\u00e1lne prijate\u013enej\u0161ou alternat\u00edvou ku klasickej roztokovej ch\u00e9mii. Jej princ\u00edp spo\u010d\u00edva v\u00a0mlet\u00ed pr\u00e1\u0161kov\u00fdch reaktantov v\u00a0\u0161peci\u00e1lnych mlynoch. Bez vyu\u017eitia rozp\u00fa\u0161\u0165adiel alebo zvy\u0161ovania teploty a\u00a0tlaku tak vedci m\u00f4\u017eu z\u00edska\u0165 \u010dasto lep\u0161\u00ed\u00a0v\u00fdsledok ako v\u00a0tradi\u010dnej ch\u00e9mii. Pomocou tejto met\u00f3dy mo\u017eno pripravi\u0165\u00a0nanomateri\u00e1ly vyu\u017eite\u013en\u00e9 v\u00a0energetike, v biologick\u00fdch aplik\u00e1ci\u00e1ch alebo dokonca recyklova\u0165\u00a0odpad.<\/strong><\/p>\n

Tentoraz slovensk\u00ed vedci h\u013eadali ekologick\u00e9 sp\u00f4soby, ako by mohli strieborn\u00e9 nano\u010dastice so stabilnou antibakteri\u00e1lnou aktivitou syntetizova\u0165 za vyu\u017eitia li\u0161ajn\u00edkov ako reduk\u010dn\u00fdch \u010dinidiel. \u201eLi\u0161ajn\u00edky s\u00fa zn\u00e1me produkciou sekund\u00e1rnych metabolitov, pri ktor\u00fdch bola preuk\u00e1zan\u00e1 ich schopnos\u0165 redukcie kovov\u00fdch i\u00f3nov, ako aj ich biologick\u00fd potenci\u00e1l vyu\u017eite\u013en\u00fd vo farmakol\u00f3gii \u010di mikrobiol\u00f3gii. Probl\u00e9mom v\u0161ak je, \u017ee tieto l\u00e1tky s\u00fa takmer nerozpustn\u00e9 vo vode,<\/em><\/strong>\u201c\u00a0<\/em>povedal Michal Goga z\u00a0Katedry botaniky Pr\u00edrodovedeckej fakulty UPJ\u0160 v Ko\u0161iciach.<\/p>\n

\"\"<\/p>\n

\u201eV s\u00fa\u010dasnosti je trendom pripravova\u0165 strieborn\u00e9 nano\u010dastice takzvanou zelenou synt\u00e9zou, ke\u010f sa zdroj striebra, naj\u010dastej\u0161ie je to dusi\u010dnan strieborn\u00fd (AgNO<\/strong><\/em>3<\/sub><\/strong>), rozpust\u00ed a\u00a0zmie\u0161a s\u00a0vodn\u00fdm extraktom nejakej rastliny. Tak\u00fdto pr\u00edstup nie je mo\u017en\u00e9 vyu\u017ei\u0165 pre v\u0161etky organizmy a\u00a0stabilita\u00a0 takto z\u00edskan\u00fdch produktov \u2013 nanosuspenzi\u00ed je ni\u017e\u0161ia, ako by to bolo v\u00a0pr\u00edpade pr\u00e1\u0161ku<\/em><\/strong>,\u201d\u00a0<\/em>vysvetlil Matej Bal\u00e1\u017e z\u00a0Oddelenia mechanoch\u00e9mie na \u00dastave geotechniky SAV v Ko\u0161iciach, ktor\u00fd so svojimi kolegami tento probl\u00e9m vyrie\u0161il pomocou mechanoch\u00e9mie.<\/p>\n

\"\"<\/p>\n

Tento inovat\u00edvny pr\u00edstup publikovali Bal\u00e1\u017ee et al. (2020) v prest\u00ed\u017enom \u010dasopise ACS Sustainable Chemistry & Engineering, na\u010do n\u00e1s upozornila tla\u010dov\u00e1 spr\u00e1va na str\u00e1nke Slovenskej akad\u00e9mie vied. Vedci v \u0161t\u00fadii okrem toho porovn\u00e1vali aj reduk\u010dn\u00fa schopnos\u0165 \u0161tyroch li\u0161ajn\u00edkov, kde tri poch\u00e1dzali z exped\u00edcie prof. Martina Ba\u010dkora na Antarkt\u00edde z roku\u00a0 2017. \u010cl\u00e1nok Goga et al. (2021) vysvet\u013euje v\u00fdznam, v\u00fdhody a nev\u00fdhody zelenej synt\u00e9zy strieborn\u00fdch nano\u010dast\u00edc pomocou li\u0161ajn\u00edkov z biologick\u00e9ho h\u013eadiska.<\/p>\n

Viac sa m\u00f4\u017eete do\u010d\u00edta\u0165 na str\u00e1nke SAV:
\nhttps:\/\/www.sav.sk\/?lang=sk&doc=services-news&source_no=73&news_no=9444<\/a><\/p>\n

Bal\u00e1\u017e, M., Goga, M., Heged\u00fcs, M., Daneu, N., Kov\u00e1\u010dov\u00e1, M., Tk\u00e1\u010dikov\u00e1. \u013d., Bal\u00e1\u017eov\u00e1, \u013d., Ba\u010dkor, M. 2020. Biomechanochemical Solid-State Synthesis of Silver Nanoparticles with Antibacterial Activity Using Lichens. ACS Sustainable Chemistry & Engineering 8 (37), 13945-13955.
\nDOI: 10.1021\/acssuschemeng.0c03211<\/p>\n

Goga, M., Bal\u00e1\u017e, M., Daneu, N., Ele\u010dko, J., Tk\u00e1\u010dikov\u00e1, \u013d., Marcin\u010dinov\u00e1, M., Ba\u010dkor, M.\u00a0 2021. Biological activity of selected lichens and lichen-based Ag nanoparticles prepared by a green solid-state mechanochemical approach. Materials Science and Engineering: C, 119 , 111640. https:\/\/doi.org\/10.1016\/j.msec.2020.111640<\/p>\n

\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"

Vedci z \u00dastavu geotechniky Slovenskej akad\u00e9mie vied a Katedry botaniky \u00dastavu biologick\u00fdch a ekologick\u00fdch vied Pr\u00edrodovedeckej fakulty Univerzity P.J. \u0160af\u00e1rika v Ko\u0161iciach<\/span> dok\u00e1zali s vyu\u017eit\u00edm mechanoch\u00e9mie syntetizova\u0165 za pou\u017eitia li\u0161ajn\u00edkov<\/span> strieborn\u00e9 nano\u010dastice kde v\u00fdrazne zv\u00fd\u0161ili\u00a0 antibakteri\u00e1lnu aktivitu.<\/p>\n","protected":false},"author":1,"featured_media":16467,"menu_order":0,"template":"","meta":{"_editorskit_title_hidden":false,"_editorskit_reading_time":0,"_editorskit_is_block_options_detached":false,"_editorskit_block_options_position":"{}"},"categories":[],"tags":[],"tax_aktuality":[],"acf":{"acf_link_na_externy_obsah":""},"yoast_head":"\nStrieborn\u00e9 nano\u010dastice za vyu\u017eitia li\u0161ajn\u00edkov - Pr\u00edrodovedeck\u00e1 fakulta | UPJ\u0160<\/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.upjs.sk\/prirodovedecka-fakulta\/actual-news\/24489\/\" \/>\n<meta property=\"og:locale\" content=\"sk_SK\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Strieborn\u00e9 nano\u010dastice za vyu\u017eitia li\u0161ajn\u00edkov - 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