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Vpliv variabilne zgradbe macesnovine na njene dimenzijske in oblikovne spremembe : diplomski projekt
ID Žagar, Primož (Author), ID Gorišek, Željko (Mentor) More about this mentor... This link opens in a new window, ID Čufar, Katarina (Reviewer)

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MD5: 3CF7E95497A32CCAE6B996B9C2B9FF62
PID: 20.500.12556/rul/17cbf4a8-7630-4451-92d0-0b714adc9218

Abstract
Dimenzijske spremembe in vpliv variabilne zgradbe lesa smo proučevali na jedrovini, mladostnem lesu in beljavi evropskega macesna (Larix decidua Mill.) ter na jedrovini sibirskega macesna (Larix sibirica (Münch) Ledeb.). Dimenzijsko stabilnost smo ugotavljali s spremljanjem krčenja (ß) in nabrekanja (alfa) ter z določanjem kazalnikov dimenzijske stabilnosti: diferencialnega nabreka (q), koeficienta nabrekanja (h) v radialni in tangencialni smeri ter sorpcijskega kvocienta (s). Prirastne značilnosti smo ocenili iz širin ranega in kasnega lesa, kjer smo določili tudi gostoto smolnih kanalov. Ugotovili smo, da med evropskim in sibirskim macesnom ni statistično značilnih razlik v dimenzijski stabilnosti lesa. Med seboj sta si najbolj podobna jedrovina in mladostni les evropskega macesna. Pri vseh meritvah je imel les sibirskega macesna najmanjšo variabilnost.

Language:Slovenian
Keywords:gostota lesa, krčenje, nabrekanje, dimenzijska stabilnost, Larix decidua Mill., evropski macesen, Larix sibirica (Münch) Lebed., sibirski macesen
Work type:Diploma project paper
Typology:2.11 - Undergraduate Thesis
Organization:BF - Biotechnical Faculty
Place of publishing:Ljubljana
Publisher:[P. Žagar]
Year:2011
Number of pages:VIII, 26 f.
PID:20.500.12556/RUL-608 This link opens in a new window
UDC:630*812
COBISS.SI-ID:1957513 This link opens in a new window
Publication date in RUL:11.07.2014
Views:1925
Downloads:363
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Secondary language

Language:English
Title:The influence of variable structure of larch wood on dimensional and shape stabillity : B. Sc. thesis
Abstract:
The swelling and shrinking of juvenile wood, sapwood and heartwood of European larch (Larix decidua Mill.) were compared to Siberian larch (Larix Sibirica (Münch) Ledeb.) heartwood. The dimensional stability was examined by observation of shrinking (ß) and swelling, and by determining the indicators of dimensional stability: differential swelling (q), swelling coefficient (h) in radial and tangential direction, and by sorption quotient (s). The growth characteristics were assessed from width of earlywood and latewood, where the resin duct density was also determined. There were no statistically distinctive differences between European and Siberian larch in wood dimensional stability. The heartwood and juvenile wood of European larch were very similar. In all measurements the wood of Siberian larch had the lowest variability.

Keywords:wood density, growth increment, shrinking, swelling, dimensional stability, European larch, Siberian larch

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