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Vsebnost ekstraktivov destiliranih vejic iglavcev v žganju : diplomsko delo = Content of extractives from distilled conifer twigs in spirit : B. Sc. thesisŠinkar, KrištofRaziskali smo vsebnost ekstraktivov vejic navadne smreke (Picea abies (L.) Karst.), navadne jelke (Abies alba Mill.) in rdečega bora (Pinus sylvestris L.) v destilatih (žganju) in v Soxhlet ... ekstraktih vejic. Vsebnost ekstraktivov smo določali pri vejicah, ki smo jih odvzeli spomladi in jeseni. Za destilacijo smo uporabili surovo žganje iz jabolk, za Soxhletovo ekstrakcijo pa metanol, različno koncentriran etanol in surovo žganje. Surove ekstrakte smo očistili z dietil etrom, da smo ločili nepolarno frakcijo od polarne. Gravimetrično smo v vzorcih izmerili količino celokupnih ekstraktivov. Z UV-Vis spektrofotometrično analizo smo kolorimetrično izmerili vsebnost celokupnih fenolov, s tekočinsko kromatografijo visoke ločljivosti (HPLC) pa vsebnost vitaminov, torej retinola, askorbinske kisline in tokoferola. Rezultati so pokazali, da vejice vseh proučevanih drevesnih vrst vsebujejo več celokupnih ekstraktivov in fenolov jeseni kot spomladi. Vejice smreke so vsebovale največ ekstraktivov, jelove pa najmanj. V destilatih so bile količine ekstraktivov bistveno nižje kot v ekstraktih. HPLC analiza je pokazala, da so vitamini v vejicah iglavcev v večji meri prisotni spomladi. Največ askorbinske kisline so vsebovali smrekovi in borovi vzorci. Retinola je bilo jeseni največ v jelovih, spomladi pa v borovih vzorcih. Tokoferola nismo zaznali v nobenem vzorcu. Dokazali smo, da se z uporabo vejic iglavcev pri žganjekuhi del ekstraktivov drevesnih tkiv predestilira v pitno žganje.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [K. Šinkar], 2020Language - slovenianCOBISS.SI-ID - 21773827
Author
Šinkar, Krištof
Other authors
Vek, Viljem |
Oven, Primož |
Poljanšek, Ida
Topics
iglavci |
žganje |
ekstraktivi |
gravimetrija |
spektrofotometrija |
kromatografija |
conifers |
spirit |
extractives |
gravimetry |
spectrophotometry |
chromatography
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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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Year | Impact factor | Edition | Category | Classification | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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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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Šinkar, Krištof | ![]() |
Vek, Viljem | 30758 |
Oven, Primož | 11223 |
Poljanšek, Ida | 12041 |
Source: Personal bibliographies
and: SICRIS
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