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master's thesis
Brzina širenja ultrazvuka kroz drvo razoreno gljivom smeđe truleži
Zagreb: University of Zagreb, Faculty of Forestry and Wood Technology, 2022. urn:nbn:hr:108:064243
Kesak, Igor
University of Zagreb
Faculty of Forestry and Wood Technology
Institute for Wood Science

Institutional repository: University of Zagreb Faculty of Forestry and Wood Technology

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Kesak, I. (2022). Brzina širenja ultrazvuka kroz drvo razoreno gljivom smeđe truleži (Master's thesis). Zagreb: University of Zagreb, Faculty of Forestry and Wood Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:108:064243

Kesak, Igor. "Brzina širenja ultrazvuka kroz drvo razoreno gljivom smeđe truleži." Master's thesis, University of Zagreb, Faculty of Forestry and Wood Technology, 2022. https://urn.nsk.hr/urn:nbn:hr:108:064243

Kesak, Igor. "Brzina širenja ultrazvuka kroz drvo razoreno gljivom smeđe truleži." Master's thesis, University of Zagreb, Faculty of Forestry and Wood Technology, 2022. https://urn.nsk.hr/urn:nbn:hr:108:064243

Kesak, I. (2022). 'Brzina širenja ultrazvuka kroz drvo razoreno gljivom smeđe truleži', Master's thesis, University of Zagreb, Faculty of Forestry and Wood Technology, accessed 30 June 2024, https://urn.nsk.hr/urn:nbn:hr:108:064243

Kesak I. Brzina širenja ultrazvuka kroz drvo razoreno gljivom smeđe truleži [Master's thesis]. Zagreb: University of Zagreb, Faculty of Forestry and Wood Technology; 2022 [cited 2024 June 30] Available at: https://urn.nsk.hr/urn:nbn:hr:108:064243

I. Kesak, "Brzina širenja ultrazvuka kroz drvo razoreno gljivom smeđe truleži", Master's thesis, University of Zagreb, Faculty of Forestry and Wood Technology, Zagreb, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:108:064243

Metadata
TitleBrzina širenja ultrazvuka kroz drvo razoreno gljivom smeđe truleži
Title (english)Speed of Ultrasound Propagation through Wood Decayed by Brown Rot Fungi
AuthorIgor Kesak
MentorMarin Hasan (mentor)
MentorVinko Paulić (komentor)
Committee memberMarin Hasan (predsjednik povjerenstva)
Committee memberVinko Paulić (član povjerenstva)
Committee memberTomislav Sedlar (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Forestry and Wood Technology
(Institute for Wood Science)
Zagreb
Defense date and country2022-09-28, Croatia
Scientific / art field,
discipline and subdiscipline		BIOTECHNICAL SCIENCES
Wood Technology
Abstract
Ultrazvučna ispitivanja danas se vrlo često koriste u dijagnostičke svrhe određivanja zdravosti drva kao nerazorna metoda. Vrlo je malo provedenih ispitivanja utjecaja stupnja biološke razgradnje na brzinu širenja ultrazvuka kroz drvo. Uzorci borovine i bukovine bili su izloženi gljivi smeđe truleži Gloeophyllum trabeum te je određeno nekoliko različitih stupnja razgradnje. Nakon kondicioniranja razorenih uzoraka, izmjerena je brzina širenja ultrazvuka kroz njih u radijalnom i tangentnom smjeru. Povećanjem gubitka mase djelovanjem gljive proporcionalno se smanjuje brzina prolaska ultrazvuka kroz drvo i u radijalnom i u tangentnom smjeru. Bez obzira na vrstu drva i gustoću i najmanji gubitak mase djelovanjem micelija gljive rezultirao je smanjenjem brzine prolaska ultrazvuka kroz drvo u odnosu na zdravo drvo. Porastom gubitka mase djelovanjem micelija gljive brzina prolaska ultrazvuka kroz drvo značajno brže opada u radijalnom nego u tangentnom smjeru.
Abstract (english)
Nowadays, ultrasonic tests are very often used for diagnostic purposes to determine the health of wood as a non-destructive method. Very few studies have been conducted on the influence of the degree of biodegradation on the speed of ultrasound through wood. Pine and beech specimens were exposed to the brown rot fungus Gloeophyllum trabeum and several different levels of degradation were determined. After conditioning the decayed specimens, the speed of ultrasound propagation through them was measured in the radial and tangential directions. By increasing the mass loss due to the action of the fungus, the speed of ultrasound through the wood is proportionally reduced in both the radial and tangential directions. Regardless of the wood species and its density, even the smallest mass loss resulted in a decrease in the speed of ultrasound through the wood compared to healthy wood. With the increase in mass loss, the speed of ultrasound through decayed wood decreases significantly faster in the radial direction than in the tangential direction.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:108:064243
Study programmeTitle: Wood Technology Processes
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka drvne tehnologije (magistar/magistra inženjer/inženjerka drvne tehnologije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2022-12-06 14:44:10