\u201eLo\u010f sv\u00e4t\u00e9ho Petra\u201c (taliansky: Barca di San Pietro) je st\u00e1ro\u010dia star\u00fd, fascinuj\u00faci vidiecky zvyk. Praktizuj\u00fa sa predov\u0161etk\u00fdm v severnom Taliansku (napr. v Ben\u00e1tsku, Lombardii a Piemonte), ale s\u00fa zn\u00e1me aj v niektor\u00fdch alpsk\u00fdch oblastiach.<\/p>\n\n\n\n
Tento ritu\u00e1l sa tradi\u010dne kon\u00e1 v noci z 28. na 29. j\u00fana \u2013 v predve\u010der sviatku sv\u00e4t\u00fdch Petra a Pavla. Pomocou vaj\u00ed\u010dka sa vo vode magicky vytvor\u00ed \u201eplachetnica\u201c.<\/p>\n\n\n\n
Legenda a \u00fa\u010del
Ke\u010f\u017ee sv\u00e4t\u00fd Peter bol pred svoj\u00edm povolan\u00edm za apo\u0161tola ryb\u00e1rom, v\u0161eobecne sa ver\u00ed, \u017ee v t\u00fato noc zostupuje na Zem. F\u00faka do n\u00e1dob veriacich, aby im uk\u00e1zal svoju pr\u00edtomnos\u0165 a aby z bielka vytvoril lo\u010f.<\/p>\n\n\n\n
Pre farm\u00e1rov t\u00e1to \u201elo\u010f\u201c sl\u00fa\u017eila ako ve\u0161tky\u0148a \u00farody a po\u010dasia:<\/p>\n\n\n\n
Otvoren\u00e9, pln\u00e9 plachty: Tieto znamenali dobr\u00e9 po\u010dasie, dostatok slne\u010dn\u00e9ho svitu a \u00faspe\u0161n\u00fa \u00farodu.<\/p>\n\n\n\n
Zatvoren\u00e9 alebo sotva vytvoren\u00e9 plachty: Tieto sa interpretovali ako znamenia siln\u00fdch da\u017e\u010fov, b\u00farok alebo slab\u00e9ho po\u013enohospod\u00e1rskeho roka.<\/p>\n\n\n\n
Ako pripravi\u0165 lo\u010f
Pr\u00edprava je neuverite\u013ene jednoduch\u00e1 a je to z\u00e1bavn\u00fd experiment, ktor\u00fd si deti dodnes u\u017e\u00edvaj\u00fa.<\/p>\n\n\n\n
Vezmite si ve\u013ek\u00fa, prieh\u013eadn\u00fa karafu, ve\u013ek\u00fd poh\u00e1r alebo prieh\u013eadn\u00fa sklenen\u00fa zav\u00e1raciu n\u00e1dobu. Napl\u0148te ju asi do troch \u0161tvrt\u00edn \u010distou vodou izbovej teploty.<\/p>\n\n\n\n
Rozbite \u010derstv\u00e9 vajce a opatrne odde\u013ete bielok od \u017e\u013atka. Jemne a pomaly nechajte do vody vk\u013aznu\u0165 iba prieh\u013eadn\u00fd bielok. Nemie\u0161ajte! Bielok klesne na dno n\u00e1doby.<\/p>\n\n\n\n
Poh\u00e1r nechajte cez noc vonku \u2013 na tr\u00e1vniku v z\u00e1hrade, na balk\u00f3ne alebo aspo\u0148 na vonkaj\u0161ej strane r\u00e1mu okna. Trad\u00edcia k\u00e1\u017ee, \u017ee sklo mus\u00ed absorbova\u0165 no\u010dn\u00fa rosu.<\/p>\n\n\n\n
Nasleduj\u00face r\u00e1no sa pozrite do poh\u00e1ra skoro r\u00e1no. Bielok vyst\u00fapi na hladinu vody a vytvor\u00ed jemn\u00e9, biele \u0161trukt\u00fary, ktor\u00e9 vyzeraj\u00fa n\u00e1padne podobne ako s\u0165a\u017ene, lan\u00e1 a plachty starej plachetnice.<\/p>\n\n\n\n
Fyzik\u00e1lne vysvetlenie: Za t\u00fdmto zdanliv\u00fdm z\u00e1zrakom sa skr\u00fdva \u010dist\u00e1 fyzika: Zem, na ktorej poh\u00e1r stoj\u00ed, si zachovala denn\u00e9 teplo, zatia\u013e \u010do vzduch sa v noci v\u00fdrazne ochladzuje. Voda v poh\u00e1ri sa ochladzuje zhora nadol, ale dole zost\u00e1va teplej\u0161ia. Tieto tepeln\u00e9 rozdiely vytv\u00e1raj\u00fa minim\u00e1lne konvek\u010dn\u00e9 pr\u00fady (pohyb vody smerom nahor).<\/p>\n\n\n\n
Preto\u017ee bielkoviny maj\u00fa o nie\u010do vy\u0161\u0161iu hustotu ako voda, ale v d\u00f4sledku rann\u00e9ho otep\u013eovania op\u00e4\u0165 menia svoju hustotu, s\u00fa \u0165ahan\u00e9 nahor mal\u00fdmi vodn\u00fdmi pr\u00fadmi ako m\u00e4kk\u00e9 nite. V\u00fdsledkom je dokonal\u00fd optick\u00fd profil plachetnice.<\/p>\n","protected":false},"excerpt":{"rendered":"
\u201eLo\u010f sv\u00e4t\u00e9ho Petra\u201c (taliansky: Barca di San Pietro) je st\u00e1ro\u010dia star\u00fd, fascinuj\u00faci vidiecky zvyk. Praktizuj\u00fa sa predov\u0161etk\u00fdm v severnom Taliansku (napr. v Ben\u00e1tsku, Lombardii a Piemonte), ale s\u00fa zn\u00e1me aj […]<\/p>\n","protected":false},"author":2,"featured_media":3676,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-3675","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-zivotne-triky"],"_links":{"self":[{"href":"https:\/\/www.sk-babickinerady.top\/index.php?rest_route=\/wp\/v2\/posts\/3675"}],"collection":[{"href":"https:\/\/www.sk-babickinerady.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sk-babickinerady.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sk-babickinerady.top\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sk-babickinerady.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3675"}],"version-history":[{"count":1,"href":"https:\/\/www.sk-babickinerady.top\/index.php?rest_route=\/wp\/v2\/posts\/3675\/revisions"}],"predecessor-version":[{"id":3677,"href":"https:\/\/www.sk-babickinerady.top\/index.php?rest_route=\/wp\/v2\/posts\/3675\/revisions\/3677"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sk-babickinerady.top\/index.php?rest_route=\/wp\/v2\/media\/3676"}],"wp:attachment":[{"href":"https:\/\/www.sk-babickinerady.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3675"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sk-babickinerady.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3675"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sk-babickinerady.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3675"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}