BF, Dept. of Wood Technology, Lj. (BFLES)
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Določitev vsebnosti celokupnih fenolov v beljavi in rdečem srcu bukve z UV/VIS spektrofotometrijo : diplomsko delo - visokošolski strokovni študij = Determination of contents of total phenols in sapwood and red heart of beach by UV/VIS spectrophotometry : graduation thesis - higher professional studiesTomažič, Jure, 1980-Preiskovali smo 2 bukvi (Fagus sylvatica L.), požagani v urbanem gozdu na pobočju Rožnika, Ljubljana. Namen naše preiskave je bil ugotoviti vsebnost celokupnih fenolov in delež ekstraktibilnih snovi ... v beljavi, rdečem srcu in reakcijskih conah na različnih višinah vzdolž drevesa. Drevesa smo razžagali, odvzeli vzorčne kolute, jih skrbno pregledali, označili vzorce, jih izžagali, zmleli in posušili. Lesni prah smo nato ekstrahirali v hladni vodni raztopini 80 % metanola s pomočjo magnetnega mešala. Delež celokupnih fenolov smo določili spektrofotometrično po Folin-Ciocalteau metodi. Ugotovili smo, da je vsebnost celokupnih fenolov v drevesu št. 1 večja v beljavi in reakcijski coni, rdeče srce pa ima nižjo povprečno vsebnost celokupnih fenolov kot rdeče srce v drevesu 2. Najvišja povprečna vsebnost celokupnih fenolov je v lesu reakcijske cone (drevo št. 1). Drevo 2 ima največjo povprečno vsebnost celokupnih fenolov v lesu beljave, sledi ji reakcijska cona; najmanjši povprečni delež celokupnih fenolov pa je v lesu rdečega srca. Rdeče srce bukve je tkivo, ki vsebuje najmanj ekstraktibilnih snovi in najmanj fenolnih. Porazdelitev fenolnih snovi v drevesu odraža fiziološko funkcijo, ki jo imajo ta tkiva v drevesu.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [J. Tomažič], 2013Language - slovenianCOBISS.SI-ID - 2119049
Author
Tomažič, Jure, 1980-
Other authors
Oven, Primož |
Poljanšek, Ida |
Petrič, Marko, 1962-
Topics
les |
bukev |
beljava |
rdeče srce |
fenoli |
spektrofotometrija |
wood |
beech |
sapwood |
red heart |
phenols |
spectrophotometry
Call number – location, accession no. ... |
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Knjižnica BF za lesarstvo vsn 0000000368 IN: 020130050 Knjižnica BF za lesarstvo vsn 368 IN: 020130050 |
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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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Tomažič, Jure, 1980- | |
Oven, Primož | 11223 |
Poljanšek, Ida | 12041 |
Petrič, Marko, 1962- | 00395 |
Source: Personal bibliographies
and: SICRIS
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