{"id":9923,"date":"2026-06-17T19:36:37","date_gmt":"2026-06-17T17:36:37","guid":{"rendered":"https:\/\/lyocorner.com\/liofilizirana-zivila-in-vec-kot-700-let-naravnega-shranjevanja\/"},"modified":"2026-06-24T14:13:38","modified_gmt":"2026-06-24T12:13:38","slug":"liofilizirana-zivila-in-vec-kot-700-let-naravnega-shranjevanja","status":"publish","type":"post","link":"https:\/\/lyocorner.com\/sl\/liofilizirana-zivila-in-vec-kot-700-let-naravnega-shranjevanja\/","title":{"rendered":"Liofilizirana \u017eivila in ve\u010d kot 700 let naravnega shranjevanja"},"content":{"rendered":"\t\t
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Liofilizirana \u017eivila in ve\u010d kot 700 let naravnega shranjevanja<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Liofilizacija odstranjuje vodo, hkrati pa ohranja ve\u010dino prvotnega okusa, videza in hranilne vrednosti hrane.<\/span><\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Liofilizirana hrana je cenjena zaradi dolgega roka trajanja, nizke te\u017ee ter zmo\u017enosti ohranjanja okusa in hranilne vrednosti. Postopek liofilizacije, ki stoji za njo, obstaja \u017ee ve\u010d kot 700 let. <\/span><\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Kako so Inki re\u0161evali problem dolgotrajnega shranjevanja hrane<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"Freeze-Drying\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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V ozadju liofilizacije je preprost princip: voda v obliki ledu iz zamrznjenega \u017eivila neposredno sublimira. Ni\u010d novega \u2013 to so izkori\u0161\u010dali \u017ee Inki. Perujski Inki so krompir in druge pridelke ohranjali tako, da so jih odlagali na visoka obmo\u010dja Andov, na primer v okolici Machu Picchuja. <\/p>

To okolje z nizkim zra\u010dnim tlakom in nizkimi temperaturami lahko \u0161tejemo za prvi \"liofilizator\". Hrana je tako ostala dlje \u010dasa obstojna. Brez soli. Brez konzervansov. Brez dodatkov oz. aditivov. <\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Kaj pravzaprav je liofilizacija?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Liofilizacija je kontroliran proces su\u0161enja, ki poteka v ve\u010d fazah:<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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\n\t\t\t\t\t\t\t\t\"Freeze-drying\t\t\t\t\t<\/div>\n\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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zamrzovanje:<\/strong> \u017eivilo se hitro zamrzne na \u201320 do \u201380 \u00b0C (odvisno od vrste \u017eivila in tehnologije),<\/p>

primarno su\u0161enje (sublimacija):<\/strong> pri zni\u017eanem tlaku led v \u017eivilu neposredno prehaja iz trdnega v plinasto stanje, brez vmesne teko\u010de faze,<\/p>

sekundarno su\u0161enje (desorpcija):<\/strong> odstrani se preostala vezana voda v \u017eivilu.<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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The process may take several hours or several days. Because the food is not exposed to high temperatures, much of its nutritional value, aroma, colour and structure can be preserved. Final moisture content is typically very low, usually around 1\u20135%, which contributes to a long shelf life when products are packaged in materials that protect against oxygen, moisture and light. <\/p>

Postopek traja ve\u010d ur do nekaj dni. Ker \u017eivilo ni izpostavljeno visokim temperaturam, se v veliki meri ohranijo hranilne snovi, aroma, barva in oblika. Kon\u010dna vsebnost vlage v \u017eivilu je obi\u010dajno nizka (pribli\u017eno 1-5%), kar vpliva na dalj\u0161o obstojnost izdelka \u2013 ki se ga pakira v embala\u017eo, neprepustno za kisik, vlago in svetlobo. <\/p>

Pri takem na\u010dinu su\u0161enja \u017eivila ohranijo skoraj vse lastnosti sve\u017eega \u017eivila \u2013 hranilne snovi, okus in videz \u2013 \u010desar z drugimi tehnikami su\u0161enja ne moremo dose\u010di. Liofilizirano \u017eivilo je izredno lahko in ima ob pravilnem shranjevanju brez dostopa kisika, vlage in svetlobe izjemno dolg rok trajanja.Liofiliziran izdelek je lahek, porozen in krhek ter ga je mogo\u010de enostavno rehidrirati z dodajanjem vode.<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Freeze-dried ni isto kot dehidrirano ali posu\u0161eno<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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V angle\u0161\u010dini za liofilizacijo uporabljamo izraz freeze-dried \u2013 zamrznjeno su\u0161eno. Liofilizirana \u017eivila se bistveno razlikujejo od dehidriranih oziroma klasi\u010dno su\u0161enih \u017eivil, pri katerih se voda odstranjuje s pomo\u010djo povi\u0161ane temperature. <\/p>

Pri dehidraciji oziroma su\u0161enju lahko zaradi delovanja toplote pride do ve\u010djih sprememb v sestavi \u017eivila, zlasti di delne razgradnje toplotno ob\u010dutljivih hranil (predvsem vitaminov), sprememb v aromi, barvi in zunanjem izgledu. <\/p>

Nasprotno pa liofilizacija poteka pri nizkih temperaturah in zni\u017eanem tlaku, zato v ve\u010dji meri ohranja hranilne snovi ter senzori\u010dne lastnosti \u017eivila. Vendar je tak postopek tehnolo\u0161ko zahtevnej\u0161i, \u010dasovno dalj\u0161i in praviloma dra\u017eji. <\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Liofilizacija (freeze-dried)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Postopek<\/strong>zamrzovanje + sublimacija<\/p>

Hranila<\/strong>ve\u010dinoma ohranjena<\/p>

Aroma in barva<\/strong>ve\u010dinoma ohranjeni<\/p>

\u010cas in stro\u0161ki<\/strong>dalj\u0161i, vi\u0161ji<\/p>

Rok trajanja<\/strong>dalj\u0161i (ob ustreznem shranjevanju)<\/p>

Rezultat<\/strong>spremenjena porozna struktura, videz in lastnosti bli\u017eje izvorni surovini<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Dehidracija (dried)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Postopek<\/strong>su\u0161enje s toploto<\/p>

Hranila<\/strong>delno razgrajena<\/p>

Aroma in barva<\/strong>pogosto spremenjena<\/p>

\u010cas in stro\u0161ki<\/strong>kraj\u0161i, ni\u017eji<\/p>

Rok trajanja<\/strong>praviloma kraj\u0161i<\/p>

Rezultat<\/strong>spremenjena struktura, zmanj\u0161ana rehidracijska sposobnost in spremenjene senzori\u010dne lastnosti<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Zgodovina liofilizacije in razvoj prvih naprav
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Prvi pomembnej\u0161i znanstveni premik je v 80. letih 19. stoletja dosegel Richard Altmann, ki je razvil liofilizacijo tkiv za histolo\u0161ke raziskave.<\/p>

Leta 1906 sta Jacques-Ars\u00e8ne d'Arsonval in Fr\u00e9d\u00e9ric Bordas izdelala prvi sodobni laboratorijski liofilizator, leta 1909 pa je Leon Shackell postopek izbolj\u0161al z elektri\u010dno vakuumsko \u010drpalko \u2013 pred tem so zni\u017ean tlak dosegli z izparevanjem dietil etra oz. etoksi etana, kar je omogo\u010dalo le omejeno in manj natan\u010dno uravnavanje procesnih pogojev. <\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Liofilizacija v medicini in re\u0161evanju \u017eivljenj
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\n\t\t\t\n\t\t\tThe major breakthrough for freeze-drying occurred during World War II.\n\nScientists Howard Walter Florey and Ernst Boris Chain used freeze-drying to stabilise penicillin and blood plasma. This made it possible to transport critical medical supplies to distant battlefields without the need for continuous refrigeration. \n\nPravi preboj liofilizacije se je zgodil med drugo svetovno vojno, ko sta zdravnika Howard Walter Florey in Ernst Boris Chain postopek uporabila za stabilizacijo penicilina in krvne plazme, kar je omogo\u010dilo transport dragocenih medicinskih pripravkov do oddaljenih boji\u0161\u010d brez hladne verige.\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Od astronavtov do vsakdanje uporabe<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Po drugi svetovni vojni je liofilizacija dobila \u0161ir\u0161o uporabo.<\/p>

Zaradi nizke mase izdelkov, dolge obstojnosti brez hladne verige ter enostavne in hitre priprave je postala standard za hrano za astronavte.<\/p>

V komercialni \u017eivilski industriji se je za\u010dela uporabljati v 60. letih \u2013 najprej pri instant kavi, nato pri sadju, zelenjavi in prigrizkih.<\/p>

Danes so na voljo okusni liofilizirani obroki \u2013 od zajtrkov in juh do glavnih jedi in sladic.<\/p>

Ko na embala\u017ei preberete freeze-dried, to ni marketin\u0161ko sporo\u010dilo, temve\u010d opis postopka, ki ima za seboj ve\u010d kot 700 let zgodovine. <\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Kdo se odlo\u010da za liofilizirano hrano?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Liofilizirani obroki predstavljajo prakti\u010dno re\u0161itev za vse, ne le za posameznike z aktivnim \u017eivljenjskim slogom.<\/p>

Kot so alpinisti, vzdr\u017eljivostni \u0161portniki, pohodniki in kampisti. Njihova prednost je nizka masa ter dolga obstojnost, brez potrebe po vzdr\u017eevanju hladne verige.<\/p>

Priprava je enostavna in hitra, saj obi\u010dajno zahteva le dodatek vro\u010de vode - ki se obi\u010dajno doda kar v embala\u017eo. Po kratkem \u010dasu rehidracije je obrok pripravljen za u\u017eivanje, pri \u010demer se v veliki meri ohranijo njegove senzori\u010dne in hranilne lastnosti. <\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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O avtorju<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\n\t\t\tEva Grohar Gros<\/strong> je predavateljica in koordinatorka prakti\u010dnega izobra\u017eevanja na BIC Ljubljana, eni vodilnih izobra\u017eevalnih ustanov v Sloveniji na podro\u010dju \u017eivilstva, gostinstva in turizma. Njen strokovni rad je osredoto\u010den na \u017eivilsko tehnologijo, metode predelave hrane in tehnike konzerviranja \u017eivil. \n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Pogosto zastavljena vpra\u0161anja<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\tKaj je liofilizirana hrana?\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t
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Liofilizirana hrana je hrana, konzervirana s pomo\u010djo liofilizacije \u2013 postopka, pri katerem se voda odstrani s sublimacijo pod pogoji nizkega tlaka in nizke temperature.<\/p>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\n\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\tAli je liofilizirana hrana zdrava?\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t
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Liofilizacija na splo\u0161no ohrani ve\u010dino prvotne hranilne vrednosti, okusa, barve in strukture hrane.<\/p>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\n\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\tKak\u0161na je razlika med liofilizirano in dehidrirano hrano?\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t
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Liofilizacija odstranjuje vodo s sublimacijo, medtem ko dehidracija odstranjuje vodo s pomo\u010djo toplote. Liofilizirana hrana obi\u010dajno ohrani ve\u010d svojih prvotnih lastnosti. <\/p>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\n\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\tKako dolgo zdr\u017ei liofilizirana hrana?\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t
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Pri pravilnem pakiranju in shranjevanju stran od kisika, vlage in svetlobe lahko liofilizirana hrana ostane uporabna ve\u010d let.<\/p>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\n\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\tZakaj je liofilizirana hrana dra\u017eja?\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\n\t\t\t\t\t
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Liofilizacija zahteva specializirano opremo, okolje z nizkim tlakom, nizke temperature in bistveno dalj\u0161i \u010das predelave v primerjavi s klasi\u010dnimi metodami su\u0161enja.<\/p>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Liofilizacija odstranjuje vodo, hkrati pa ohranja ve\u010dino prvotnega okusa, videza in hranilne vrednosti hrane. 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