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Les rdečega bora kot vir pinosilvinov : magistrska naloga = Wood of Scots pine as a source of pinosylvins : M. Sc. thesisPlešnik, MaticNa podlagi preliminarnih poskusov smo zasnovali laboratorijsko postavitev petfazne protitočne ekstrakcije, da bi iz lesa ekstrahirali pinosilvine, ki bi lahko bili primerni za uporabo v prehrani. Kot ... vir iskanih komponent smo uporabili les rdečega bora, iz več dreves na dveh različnih slovenskih rastiščih. Industrijske vzorce grč in jedrovine smo laboratorijsko pripravili kot homogeni granulat. Za topilo smo uporabili destilirano vodo, vodni raztopini etanol/H2O (50/50, 60/40 (v/v)) ter vodno raztopino aceton/H2O (95/5 (v/v)). Ekstrakcija je potekala 15 min pri temperaturi vrelišča posameznega topila. Ekstraktom smo z UV-VIS absorpcijsko spektroskopijo določili vsebnost celokupnih fenolov in s HPLC analizo vsebnost pinosilvina (PS) ter pinosilvin monometilnega etra (PSMME). Vsebnost obravnavanih komponent je bila najnižja pri vodnih ekstraktih (grče <13 mg/g, jedrovina <5 mg/g). Najvišjo vsebnost pa smo dosegli z acetonsko ekstrakcijo (grče <35 mg/g, jedrovina <10 mg/g). Medtem ko so etanolni ekstrakti vsebovali: grče <33 mg/g, jedrovina <10 mg/g. Razmerje med ekstrahiranim pinosilvinom in pinosilvin monometilnim etrom je pri vodnih ekstraktih okoli 1:1,5 pri etanolnih in acetonskih ekstraktih pa 1:3. Protitočna ekstrakcija je primerna metoda za pridobivanje pinosilvinov iz lesa borov.Type of material - master's thesis ; adult, seriousPublication and manufacture - Ljubljana : [M. Plešnik], 2014Language - slovenianCOBISS.SI-ID - 2342537
Author
Plešnik, Matic
Other authors
Poljanšek, Ida |
Oven, Primož |
Petrič, Marko, 1962-
Topics
les |
rdeči bor |
grče |
protitočna ekstrakcija |
ekstrakti |
pinosilvin |
HPLC |
HPLC |
wood |
Scots pine |
knots |
extraction |
extracts |
pinosylvin |
HPLC |
HPLC
Library/institution |
City | Acronym | For loan | Other holdings |
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BF, Department of Wood Science and Technology, Lj. | Ljubljana | BFLES |
reading room 1 cop.
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DRS, in which the journal is indexed
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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Plešnik, Matic | |
Poljanšek, Ida | 12041 |
Oven, Primož | 11223 |
Petrič, Marko, 1962- | 00395 |
Source: Personal bibliographies
and: SICRIS
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