National and University Library, Ljubljana (NUK)
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Koncentriranje diterpenskih fenolov s postopkom superkritične ekstrakcije : doktorska disertacijaRižnar, KlavdijaRaziskovalno delo v okviru doktorske disertacije na področju načrtovanja visokotlačnega postopka za koncentriranje diterpenskih fenolov iz rastlinskih materialov je zajemalo eksperimentalno določitev ... ravnotežnih topnosti karnozolne kisline in karnozola z različnimi zgoščenimi plini (ogljikov dioksid in propan). Namen je bil določiti vpliv dejavnikov na potek topnostnihizoterm. Ravnotežne topnosti smo korelirali z empiričnim modelom za oceno topnosti v odvisnosti od gostote topila (Chrastil model). Nadalje smo izvedli superkritično ekstrakcijo rožmarinovega ekstrakta s superkritičnimi fluidi v laboratorijskem merilu, kjer smo raziskali vpliv procesnih parametrovna dobit ekstrakcije, vsebnost karnozolne kisline in karnozola v ekstraktu in ekstrakcijskem preostanku. Na osnovi kinetike ekstrakcije smo z matematičnim modelom, ki izhaja iz drugega Fickovega zakona, določili snovne transportne koeficiente. Antioksidativno in antimikrobno učinkovitost rožmarinovega ekstrakta v dveh različnih formulacijah (glede na vsebnost karnozolne kisline) in sintetičnega konzervansa smo določali na vakuumsko pakiranih piščančjih hrenovkah. Z Rancimat metodo smo konduktometrično merili nastale produkte oksidacije nenasičenih maščobnih kislin in kvantitativno določili antimikrobni učinek s skupnim številom mikroorganizmov.Type of material - dissertation ; adult, seriousPublication and manufacture - Maribor : [K. Rižnar], 2008Language - slovenianCOBISS.SI-ID - 241942016
Author
Rižnar, Klavdija
Other authors
Škerget, Mojca |
Knez, Željko
Topics
Diterpenski fenoli |
Koncentriranje |
Disertacije |
Superkritična ekstrakcija |
Disertacije |
superkritični fluidi |
ekstrakcija |
ravnotežna topnost |
ekstrakt rožmarina |
karnozolna kislina |
karnozol
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Database name | Field | Year |
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Rižnar, Klavdija | 20089 |
Škerget, Mojca | 11865 |
Knez, Željko | 02619 |
Source: Personal bibliographies
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