izpis_h1_title_alt

Spremembe mehanskih lastnosti lesa zaradi delovanja gliv modrivk : diplomsko delo
Vek, Viljem (Author), Humar, Miha (Mentor) More about this mentor... This link opens in a new window, Bučar, Bojan (Reviewer)

URLURL - Presentation file, Visit http://www.digitalna-knjiznica.bf.uni-lj.si/dn_vek_viljem.pdf New window

Abstract
Glive modrivke les načeloma samo estetsko razvrednotijo in naj ne bi vplivale na mehanske lastnosti lesa. Da bi to hipotezo potrdili oziroma ovrgli, smo vzorce rdečega bora (0,5 x 1,0 x 20,0 cm) za 2, 4, 6 ali 8 tednov izpostavili delovanju testnih gliv modrivk Aureobasidium pullulans in Sclerophoma pithyophila. Z uporabo nedestruktivnih metod smo vzorcem pred in po izpostavitvi določili maso, modul elastičnosti, kemijske lastnosti (FTIR), barvo površine ter delež ogljika in dušika. Rezultati testa so pokazali, da sprememba mase in kemijske sestave lesa nista bistveni, medtem ko pa se modul elastičnosti rahlo poveča. Po pričakovanju smo določili tudi močno spremembo barve vzorcev, saj so le-ti zelo potemneli. Nazadnje smo z elementno analizo CNS ugotovili padec dušika v okuženih vzorcih. Na osnovi opisanih rezultatov sklepamo, da bi lahko pomodrel les v večjem obsegu uporabljali za konstrukcijski les oziroma za nosilne elemente.

Language:Slovenian
Keywords:glive modrivke, rdeči bor, nedestruktivne metode, mehanske lastnosti, melamin, razkroj
Work type:Undergraduate thesis (m5)
Tipology:2.11 - Undergraduate Thesis
Organization:BF - Biotechnical Faculty
Year:2007
Publisher:[V. Vek]
Number of pages:XI, 58 f.
Place:Ljubljana
UDC:630*844.1
COBISS.SI-ID:1563785 Link is opened in a new window
Views:721
Downloads:143
Metadata:XML RDF-CHPDL DC-XML DC-RDF
 
Average score:(0 votes)
Your score:Voting is allowed only to logged in users.
:
Share: Bookmark and Share

Secondary language

Language:English
Abstract:
Blue stain fungi change visual appearance of wood and supposedly do not influence mechanical properties of attacked wood. To prove or reject this hypothesis, specimens of pine wood (0.5 x 1.0 x 20.0 cm) were exposed to 2 blue stain fungi: Aureobasidium pullulans and Sclerophoma pithyophila for 2, 4, 6 or 8 weeks. Using non-destructive techniques, the following parameters were determined: mass, chemical properties (FTIR), colour of specimens, so as carbon and nitrogen content. Results showed that there are almost no chemical and mass changes: however slightly increased modulus of elasticity was determined. As expected, the colour of the specimens changed to dark tones. Furthermore, CNS analysis showed decrease of nitrogen content in colonized specimens. On the basis of these results, it can be concluded that such wood could be more extensively used for construction purposes.

Keywords:blue stain fungi, Scotch pine, non-destructive methods, mechanical properties, melamin, decay

Similar documents

Similar works from RUL:
Similar works from other Slovenian collections:

Comments

Leave comment

You have to log in to leave a comment.

Comments (0)
0 - 0 / 0
 
There are no comments!

Back