BF, Dept. of Wood Technology, Lj. (BFLES)
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Vpliv zgradbe branike na gostoto in dimenzijsko stabilnost lesa rdečega bora : diplomsko delo = Growth ring structure impact on density and dimensional stability of Scotch Pine : B. Sc. thesisŠkrinjar, ŽanBori v gozdovih Slovenije predstavljajo približno 6 % lesne zaloge. Predhodne raziskave so pokazale, da med rastišči obstajajo razlike, tako v pojavnosti obsega in intenzivnosti jedrovine, kot tudi v ... širini branik. V literaturi ni mogoče najti natančnih podatkov o zvezi med deleži ranega in kasnega lesa ter dimenzijsko stabilnostjo. Dimenzijska stabilnost je pomembna z vidika uporabe lesa in ni odvisna le od ojedritvenih procesov ter od deleža ekstraktivnih snovi v lesu. S pomočjo finega brušenja in visoko-ločljivostnega skeniranja smo izdelali kvalitetne fotografije površin lesa na prečnih prerezih rdečega bora. S programsko opremo NIS-Elements ter ImageJ smo dobili razmerje med ranim in kasnim lesom ter izmerili širine branik. Pridobljene parametre posameznega vzorca smo nato uporabili za preučevanje korelacij med širinami branik ter deleži ranega in kasnega lesa, gostoto in dimenzijsko stabilnostjo. Rezultati so pokazali, da so drevesa iz ugodnejših rastišč imela les s širšimi branikami, ki je imel večji delež ranega lesa. Les z večjim deležem ranega lesa je imel manjše skrčke in nižjo gostoto. Vzorci lesa z ožjimi branikami so imeli večji delež kasnega lesa, večji volumski srček in večjo prečno krčitveno anizotropijo. Istočasno pa ima les z ožjimi branikami višjo gostoto in z njo povezane boljše mehanske lastnosti.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [Ž. Škrinjar], 2018Language - slovenianCOBISS.SI-ID - 2944137
Author
Škrinjar, Žan
Other authors
Merela, Maks |
Straže, Aleš
Topics
anatomija lesa |
rdeči bor |
gostota lesa |
dimenzijska stabilnost |
anatomy of wood |
Scotch pine |
density of wood |
dimensional stability
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Knjižnica BF za lesarstvo dv1 0000000103 IN: 020180146 Knjižnica BF za lesarstvo dv1 103 IN: 020180146 |
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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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Škrinjar, Žan | ![]() |
Merela, Maks | 24676 |
Straže, Aleš | 18149 |
Source: Personal bibliographies
and: SICRIS
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