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Zveza med vsebnostjo ekstraktivov in sorpcijskimi lastnostmi rdečega bora (Pinus sylvestris) : magistrska naloga = Relation between extractives content and sorption properties of Scots pine (Pinus sylvestris) : M. Sc. thesisŠtolcer, VanjaPri rdečem boru (Pinus sylvestris L.) smo proučevali anatomske razlike med beljavo in jedrovino, določili smo vsebnost ekstraktivov v beljavi in jedrovini, preučevali higroskopnost beljave in ... jedrovine ter poiskali zvezo med vsebnostjo ekstraktivov in sorpcijskimi lastnostmi. Preiskave so bile opravljene na 6 testnih drevesih. Anatomske preiskave so bile opravljene s klasično svetlo-poljsko mikroskopijo. Preiskovanje vzorcev za določanje dimenzijske stabilnosti in sorpcijskih lastnosti je potekalo po uravnovešanju v steklenih klima komorah. Vzorce za kemijsko analizo smo ekstrahirali s cikloheksanom ter zmesjo acetona in vode, deleţ celokupnih fenolov pa določili z UV/VIS spektrofotometrijo. Razlike med beljavo in jedrovino so bile v smolnih kanalih, v lumnih aksialnih traheid ob trakovih ter v trakovnih parenhimskih celicah in obokanih piknjah. Deleţ ekstraktivnih snovi v jedrovini je bil večji kot v beljavi in nakazuje na pojav spojin s fenolnim karakterjem, bodisi lignina ali ostalih fenolnih spojin. Preiskave beljave in jedrovine niso pokazale statistično značilnih razlik v gostoti v absolutno suhem stanju, pri točki nasičenja celičnih sten, v prostorninskih skrčkih in nabrekih in ne pri koeficientu nabrekanja v tangencialni smeri. Ojedritveni procesi povzročajo statistično značilne razlike med beljavo in jedrovino v prečni krčitveni anizotropiji, diferecialnem nabreku v radialni in tangencialni smeri, v koeficientu nabrekanja v radialni smeri ter pri sorpcijskem kvocientu. Vlaţnost beljave je bila 90 %, vlaţnost jedrovine pa 24 %. Raziskava, opravljena na primeru rdečega bora, je pokazala, da spremembe, ki se v lesu zgodijo v procesu ojedritve, vplivajo na anatomsko in kemijsko zgradbo lesa, kar nadalje vpliva tudi na določene sorpcijske lastnosti lesa.Type of material - master's thesis ; adult, seriousPublication and manufacture - Ljubljana : [V. Turičnik], 2014Language - slovenianCOBISS.SI-ID - 2313097
Author
Štolcer, Vanja
Other authors
Merela, Maks |
Oven, Primož |
Gorišek, Željko
Topics
rdeči bor |
sorpcijske lastnosti |
ekstraktivi |
beljava |
jedrovina |
jedrovina |
red pine |
sorption properties |
extractives |
sapwood |
heartwood |
heartwood
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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Štolcer, Vanja | |
Merela, Maks | 24676 |
Oven, Primož | 11223 |
Gorišek, Željko | 05732 |
Source: Personal bibliographies
and: SICRIS
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