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Kapalina, která ztuhne při zahřátí

"voda má nejnižší hustotu při 4 °C nad nulou"

opravte si na

"voda má nejvyssi hustotu při 4 °C nad nulou"

Děkuji za upozornění.

α-cyklodextrin a 4-metylpyridin, může to normální smrtelník někde sehnat?

to Vojta: ty chemikalie asi tezko jen tak sezenes. Leda, ze bys mel znameho, kdo pracuje v oboru.

Už jsem zjistil, že by se sehnat daly, ale jsou drahé. 4-metylpyridin (4-picoline, C6H7N) ještě jde - 250 ml za cca 11 euro. Ale a-cyklodextrin (Cyclohexaamylose, C36H60O30) 25 gramu za cca 280 euro.

Vyuziti? Snadne treba pri modelovani otisknout rekneme kost nebo neco takoveho do kapaliny ktera ma 40 stupnu je bez problemu... a jde to pouzivat vickrat... to je idelani podle otisku se pak udela odlitek. Tod jedna z moznosti... vyuziti se urcite najde mnohem vic... treba pri haseni.. by to jiste slo nejak pouzit kdyz stoupne telota muze se tak znepristupnit nejake misto..atd.

nazdar opravdu ne zarazilo ze o tohle tema se muze obycejny smrtelny cer zajimat ...:)...opravdu zajimave a dekuji za informace...:)

a co se s tou kapalinou děje při teplotách nad 75°C? Ne že by to bylo důležité :-), ale napadlo mně to, sublimje nebo zase zkapalní jako slušně vychovaná pevná látka?

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