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Protimikrobni učinek hmeljnega ekstrakta pridobljenega s superkritičnim CO2 [Elektronski vir]Botić, Tanja ...V Laboratoriju za separacijske procese in produktno tehniko Fakultete za kemijo in kemijsko tehnologijo, smo raziskali protimikrobni učinek hmeljnega ekstrakta pridobljenega s superkritičnim CO2. ... Prednosti ekstrakcije s superkritičnim CO2 so predvsem v dobljenem končnem produktu, ki je zelo koncentriran, ne vsebuje primesi in kar je najpomembnejše ne vsebuje naravno prisotne bakterijske flore. S pomočjo HPLC analize smo v dobljenem hmeljnem ekstraktu določili vsebnost kislin (alfakislin in beta-kislin). Ekstrakt je vseboval 48,6% alfa-kislin in 22,2% beta-kislin, med alfakislinami so 30,3% delež predstavljali kohumuloni in med beta-kislinami so 55,8% delež predstavljali kolupuloni. Protimikrobno učinkovitost hmeljnega ekstrakta smo z različnimi metodami preverili na treh patogenih bakterijah: E. coli, B. cereus in P. fluorescens. Največjo protimikrobno učinkovitost dodanega hmeljnega ekstrakta smo zaznali v vzorcih odvzetih v prvih 6h in 24h rasti bakterij B. cereus in P. fluorescens, medtem, ko na rast E. coli dodan ekstrakt prvih 6h ni vplival. Po daljši inkubaciji z nižjimi koncentracijami hmeljnega ekstrakta smo zaznali, da je inhibicija rasti bakterije B. cereus prehodne narave saj se ta v rastnem mediju po 24h začne ponovno razmnoževati. Pri bakterji P. fluorescens do tega pojava ne pride in je na dodatek hmeljnegaekstrakta v primerjavi z ostalimi bakterijami najbolj občutljiva. PriE. coli se po daljši inkubaciji s hmeljnim ekstraktom v rastnem mediju sicer zmanjšuje število bakterij medtem, ko do popolne inhibicije rasti ne pride.Source: Slovenski kemijski dnevi 2008, Maribor, 25. in 26. september 2008 [Elektronski vir] : [zbornik referatov] (8 str.)Type of material - conference contribution ; adult, seriousPublish date - 2008Language - slovenianCOBISS.SI-ID - 12622102
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Year | Impact factor | Edition | Category | Classification | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Botić, Tanja | 27839 |
Košir, Iztok Jože, 1970- | 17916 |
Škerget, Mojca | 11865 |
Knez, Željko | 02619 |
Source: Personal bibliographies
and: SICRIS
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