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Znanstveno-stručno i staleško glasilo
Hrvatskoga šumarskoga društva
Journal of Forestry Society of Croatia
      Prvi puta izašao 1877. godine i neprekidno izlazi do današnjeg dana
   ISSN No.: 0373-1332              UDC 630* https://doi.org/10.31298/sl
upute autorima
WEB EDITION
ARHIVA ČASOPISA


HRČAK


 
EDITORIAL
     
Uredništvo
Will a change in the ministry bring about a changein the attitude towards the forestry profession?     pdf     HR     EN 389
 
ORIGINAL SCIENTIFIC PAPERS
     
Damir Ugarković, Željko Španjol, Ivica Tikvić, Dražen Kapučija, Ivana Plišo Vusić UDK 630* 111 (001)
https://doi.org/10.31298/sl.143.9-10.1
Microclimate differences in the degradation stages of holm oak (Quercus ilex L.) forests     pdf     HR     EN 391
Ivan Lukić, Nikola Lacković, Milan Pernek, Christa Schafellner UDK 630* 453 (001)
https://doi.org/10.31298/sl.143.9-10.2
Redefinition of critical numbers of gypsy moth (Lymantria dispar L.) egg masses for pedunculate oak (Quercus robur L.) and first calculation for common beech (Fagus sylvatica L.) in Republic of Croatia     pdf     HR     EN 403
Muammer Şenyurt, Ilker Ercanli UDK 630* 524 (001)
https://doi.org/10.31298/sl.143.9-10.3
A comparison of artificial neural network models and regression models to predict tree volumes for crimean black pine trees in Cankiri forests     pdf     HR     EN 413
Tomislav Sedlar, Tomislav Sinković, Ivana Perić, Andrej Jarc, Srđan Stojnić, Bogoslav Šefc UDK 630* 812 (001)
https://doi.org/10.31298/sl.143.9-10.4
Hardness of thermally modified beech wood and hornbeam wood     pdf     HR     EN 425
Summary
There is increasing number of products made of termally modified wood (mainly floor coverings) in wood market. Thermal modification at temperatures above 160 °C in oxygen free environment is known to alter the physical and mechanical properties of wood, among others. In this work, change in Brinell hardness of beech wood and hornbeam wood subjected to 200 °C in oxygen free environment for 48 hours was investigated in relation with unmodified wood of the same species. Beech and hornbeam were selected because of the impacts of climate change as well as future predictions on the distribution of beech and hornbeam in South East Europe. Wood hardness was investigated on cross, radial and tangential sections. The dependence of wood hardness on wood density was also shown. All measurements were performed at 12% EMC (equilibrium moisture content) of wood. The average values of Brinell hardness of termally modified beech wood and hornbeam wood were significantly different and smaller than the average values of unmodified beech wood and hornbeam wood. As expected, thermal modification caused weight reduction and consequently, decrease in the density of beech wood and hornbeam wood. Applied thermal modification reduced Brinell hardness of beech wood cross section for 3%, radial section for 15%, and tangential section for 25%. Applied thermal modification reduced Brinell hardness of hornbeam wood cross section for 6%, radial section for 18%, and tangential section for 13%.
Applied thermal modification negatively influenced Brinell hardness on all three sections of investigated beech wood and hornbeam wood. The recorded decrease in hardness still does not hinder the use of such modified wood in non-load-bearing wood structures and wood flooring.

Key words: Brinell hardness; thermally modified wood; beech wood; hornbeam wood
 
PRELIMINARY COMMUNICATION
     
Anamarija Jazbec, Mislav Vedriš, Ksenija Šegotić UDK 630*945
https://doi.org/10.31298/sl.143.9-10.5
Analysing the duration of studyng on undergraduate studies et the Faculty of forestry, University of Zagreb     pdf     HR     EN 435
Jelena Nedeljković, Mirjana Stanišić, Dragan Nonić, Mersudin Avdibegović, Marta Curman, Špela Pezdevšek Malovrh UDK 630* 111
https://doi.org/10.31298/sl.143.9-10.6
Climate change governance in forestry and nature conservation: institutional framework in selected see countries     pdf     HR     EN 445
 
PROFESSIONAL PAPERS
     
Ivana Plišo Vusić, Irena Šapić, Joso Vukelić UDK 630* 181.6 + 187
https://doi.org/10.31298/sl.143.9-10.7
Identification and mapping of Natura 2000 forest habitat types in Croatia (II) – 91F0, riparian mixed forests of Quercus robur, Ulmus laevis, Ulmus minor and Fraxinus angustifolia; 91L0, Oak-hornbeam forests of the illyrian area     pdf     HR     EN 461
Damir Drvodelić, Igor Poljak, Ivan Perković, Mario Šango, Katarina Tumpa, Ivana Zegnal, Marilena Idžojtić UDK 630* 232.3
https://doi.org/10.31298/sl.143.9-10.8
Laboratory germination testing of the sweet chestnut (Castanea sativa Mill.) according to ISTA rules     pdf     HR     EN 469

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