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Vpliv prirastnih značilnosti na mehanske lastnosti smrekovine subalpskega področja : diplomsko delo (univerzitetni študij) = Influence of growth characteristics on mechanical properties of spruce wood from sub-alpine area : graduation thesis (university studies)Koprivnikar, RokPreverili smo medsebojne vplive prirastnih značilnosti, gostote in mehanskih lastnosti za juvenilno in adultno smrekovino subalpskega področja. Teste smo izvedli na naključno izbranih vzorcih s ... preverjenim poreklom. Določili smo gostoto lesa, s sistemom Lintab pa smo izmerili širine branik, ranega in kasnega lesa ter iz podatkov določili delež kasnega lesa. Med mehanskimi lastnostmi smo na univerzalnem testirnem stroju Zwick Z100 izmerili upogibno in tlačno trdnost smrekovine ter iz upogibnega eksperimenta določili modul elastičnosti. Ugotovili smo, da so branike v mladostnem obdobju za tretjino širše; delež kasnega lesa je za približno 3,54 % manjši, gostota pa za 12 % manjša kot v zrelem lesu. Mehanske lastnosti mladostnega lesa so v povprečju za 7 % slabše kot v zrelem. Preučevane lastnosti mladostnega lesa so v povprečju za 7 % slabše kot v zrelem. Preučevane lastnosti zrele smrekovine so primerljive s splošno znanimi podatki iz literature, z izjemo tlačne trdnosti, ki je nekoliko slabša.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [R. Koprivnikar], 2002Language - slovenianCOBISS.SI-ID - 933257
Author
Koprivnikar, Rok
Other authors
Gorišek, Željko |
Čufar, Katarina
Topics
smreka |
prirastne značilnosti |
mehanske lastnosti |
juvenilen les |
adulten les |
subalpsko področje |
Norway spruce |
growth characteristics |
mechanical properties |
juvenile wood |
adult wood |
Sub-Alpine area
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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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Gorišek, Željko | 05732 |
Čufar, Katarina | 02937 |
Source: Personal bibliographies
and: SICRIS
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