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Katedra za management in ekonomiko lesnih podjetij (Oddelek za lesarstvo Biotehniške fakultete) je prejela prestižno priznanje mednarodne asociacije WoodEMA
Les Pub Date : 2022-07-26 DOI: 10.26614/les-wood.2022.v71n01a09
Leon Oblak
{"title":"Katedra za management in ekonomiko lesnih podjetij (Oddelek za lesarstvo Biotehniške fakultete) je prejela prestižno priznanje mednarodne asociacije WoodEMA","authors":"Leon Oblak","doi":"10.26614/les-wood.2022.v71n01a09","DOIUrl":"https://doi.org/10.26614/les-wood.2022.v71n01a09","url":null,"abstract":"","PeriodicalId":52851,"journal":{"name":"Les","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42444984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Klub alumnov lesarstva v letu 2022 校友木材俱乐部2022
Les Pub Date : 2022-07-26 DOI: 10.26614/les-wood.2022.v71n01a11
Katarina Čufar, Boštjan Lesar
{"title":"Klub alumnov lesarstva v letu 2022","authors":"Katarina Čufar, Boštjan Lesar","doi":"10.26614/les-wood.2022.v71n01a11","DOIUrl":"https://doi.org/10.26614/les-wood.2022.v71n01a11","url":null,"abstract":"","PeriodicalId":52851,"journal":{"name":"Les","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48460876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The synergistic effect of microwave drying and plasma surface treatments on the wettability of green wood 微波干燥与等离子体表面处理对绿色木材润湿性的协同作用
Les Pub Date : 2022-06-30 DOI: 10.26614/les-wood.2022.v71n01a01
Sauradipta Ganguly, J. Žigon, K. Srinivasa, M. Petrić, S. Dahle
{"title":"The synergistic effect of microwave drying and plasma surface treatments on the wettability of green wood","authors":"Sauradipta Ganguly, J. Žigon, K. Srinivasa, M. Petrić, S. Dahle","doi":"10.26614/les-wood.2022.v71n01a01","DOIUrl":"https://doi.org/10.26614/les-wood.2022.v71n01a01","url":null,"abstract":"In spite of being both a one-step solution to several problems associated with woodworking and also energy efficient, the application of microwave (MW) modification in wood research has remained very limited and this promising method has practically no use in wood industries across the globe. Research done so far in this field primarily sheds light on its potential in enhancing wood permeability, treatability and uniform wood drying. While MW treatments are mostly used on wet or green wood, another modification technique, plasma, has potential benefits to synergistically enhance the effects of MW treatment, but so far has not been applied on wet or green wood specimens. This study takes a first step to investigate the effects of plasma treatments (PT) on green wood specimens, as well as combinations of MW and plasma treatments. As a preliminary study, the methodology focuses on water contact angle measurements, since these are most commonly used as indicators for surface modifications in industrial applications. An exponential time dependence was found for the contact angle on the investigated samples of Norway spruce (Picea abies Karst.). Initial contact angles after droplet deposition increased due to drying and migration of organic molecules during treatments. In comparison with the literature, the effect of plasma was significantly less pronounced on wet wood specimens. The initial contact angles showed the lowest statistical variations after MW treatment, whereas plasma increased inhomogeneities. The final contact angles on treated specimens was lowest for PT-only specimens as well as specimens treated with plasma after MW. In contrast to the initial contact angles, the final contact angles showed the lowest variations after PT. Wetting rates were insignificantly improved by plasma, with reduced statistical variations after all treatments.","PeriodicalId":52851,"journal":{"name":"Les","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48887348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dr. Jure Žigon je prejel Jesenkovo nagrado Biotehniške fakultete UL za najboljšega diplomanta doktorskega študija 3. stopnje 2021 Jurežigon博士获得了卢布尔雅那大学生物技术学院颁发的Jesenk奖，以表彰其博士研究的最佳毕业生3。2021级
Les Pub Date : 2022-06-30 DOI: 10.26614/les-wood.2022.v71n01a07
Sebastian Dahle, Marko M. Petrić
{"title":"Dr. Jure Žigon je prejel Jesenkovo nagrado Biotehniške fakultete UL za najboljšega diplomanta doktorskega študija 3. stopnje 2021","authors":"Sebastian Dahle, Marko M. Petrić","doi":"10.26614/les-wood.2022.v71n01a07","DOIUrl":"https://doi.org/10.26614/les-wood.2022.v71n01a07","url":null,"abstract":"Jesenkove nagrade Biotehniške fakultete UL so najvišja priznanja za pedagoške, raziskovalne in strokovne dosežke ter za gospodarski in splošni družbeni napredek na področju biotehniških ved v Sloveniji. Biotehniška fakulteta jih podeljuje že vse od leta 1973, med njimi tudi Jesenkovo nagrado za najboljšega diplomanta doktorskega študija. Za leto 2021 je to nagrado na slovesnosti v marcu 2022 prejel asist. dr. Jure Žigon, ki je na Oddelku za lesarstvo BF zaposlen kot samostojni strokovni delavec.","PeriodicalId":52851,"journal":{"name":"Les","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43530550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Physical and chemical properties of three wild almond wood species grown in Zagros forests 扎格罗斯森林三种野生杏仁木的理化性质
Les Pub Date : 2022-06-30 DOI: 10.26614/les-wood.2022.v71n01a03
L. Fathi, R. Hasanagić, Yaghoob Iranmanesh, Mohammad Dahmardeh Ghalehno, M. Humar, M. Bahmani
{"title":"Physical and chemical properties of three wild almond wood species grown in Zagros forests","authors":"L. Fathi, R. Hasanagić, Yaghoob Iranmanesh, Mohammad Dahmardeh Ghalehno, M. Humar, M. Bahmani","doi":"10.26614/les-wood.2022.v71n01a03","DOIUrl":"https://doi.org/10.26614/les-wood.2022.v71n01a03","url":null,"abstract":"In this study, the physical properties (oven-dry density, basic density, volumetric shrinkage, and swelling) and structural components (cellulose, lignin, and extractives content) of three wild almond wood species from southwestern Iran, namely Amygdalus arabica, Amygdalus eburna, and Amygdalus scoparia, were investigated. Wild almond is a valuable wood species in the Zagros forests of Iran, but there is a lack of data on their wood properties. Three adult trees of each species were chosen, and samples were prepared from the breast height diameter to measure the focal properties. Results of analysis of variance (ANOVA) showed that the wood species had a significant effect on the wood density and volumetric shrinkage. Maximum oven-dry density and volumetric shrinkage of wood were identified in Amygdalus scoparia. The highest and lowest content of structural components were found in Amygdalus scoparia and Amygdalus arabica wood species, respectively. A deep understanding of the almond wood characteristics will provide a fresh insight into the relationship between the properties and conservation of these special, as well as applications of their wood.","PeriodicalId":52851,"journal":{"name":"Les","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42995628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dendrokronologija in absolutno datiranje kolišč na Ljubljanskem barju 卢布尔雅那沼泽的树木年表和桩的绝对年代测定
Les Pub Date : 2022-06-30 DOI: 10.26614/les-wood.2022.v71n01a06
Katarina Čufar, Maks Merela, Luka Krže, A. Velušček
{"title":"Dendrokronologija in absolutno datiranje kolišč na Ljubljanskem barju","authors":"Katarina Čufar, Maks Merela, Luka Krže, A. Velušček","doi":"10.26614/les-wood.2022.v71n01a06","DOIUrl":"https://doi.org/10.26614/les-wood.2022.v71n01a06","url":null,"abstract":"Na 16 koliščih na Ljubljanskem barju v Sloveniji je bilo med leti 1995 in 2021 z arheološkimi izkopavanji zbranih več kot 8.800 vzorcev z vodo napojenega arheološkega lesa. Večina vzorcev je bilo odvzetih iz pilotov, zabitih v zemljo, na katerih so bila zgrajena bivališča. Približno 20 % vzorcev je bilo iz lesa hrasta (Quercus sp.) in jesena (Fraxinus sp.), z več kot 45 branikami, ki jih je bilo mogoče vključiti v dendrokronološke analize in sestaviti kronologije širin branik za večino najdišč. Datiranje z uporabo dendrokronologije, radiokarbonskega datiranja in metode wiggle matching ter telekonekcije z nemško-švicarsko referenčno kronologijo so omogočili na leto natančno absolutno datiranje hrasta v časovnem okviru 3771–3330 pr. Kr. (kronologija BAR-3330), medtem ko so bili natančni radiokarbonski datumi pridobljeni za kronologije, ki pokrivajo obdobji 3285–3109 ± 14 kal. pr. Kr. (SG-VO) in 2659–2417 ± 18 kal. pr. Kr. (ZA-QUSP1). Potencial kronologij jesena, zlasti tistih iz 3. tisočletja pr. Kr., kjer ta vrsta prevladuje, še ni bil v celoti izkoriščen.","PeriodicalId":52851,"journal":{"name":"Les","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46433254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Sorption properties of wood impregnated with the fire retardant Burnblock 用阻燃剂Burnblock浸渍木材的吸附性能
Les Pub Date : 2022-06-30 DOI: 10.26614/les-wood.2022.v71n01a02
M. Humar, B. Lesar, Davor Kržišnik
{"title":"Sorption properties of wood impregnated with the fire retardant Burnblock","authors":"M. Humar, B. Lesar, Davor Kržišnik","doi":"10.26614/les-wood.2022.v71n01a02","DOIUrl":"https://doi.org/10.26614/les-wood.2022.v71n01a02","url":null,"abstract":"The sorption properties of wood have a characteristic influence on some of its properties, such as the mechanical properties and susceptibility to fungal decay. Moist wood is more susceptible to fungal decay, and wood is often impregnated in order to protect it from fungal decomposition, photodegradation or fire. In particular, inorganic salts affect the sorption properties of wood. For this purpose, the sorption properties of Norway spruce wood impregnated with Burnblock refractory (uptake 38 kg/m³) were investigated. The microscopic analysis confirmed the presence of crystals of this in the cell lumina of wood tissue. Sorption properties were determined using an instrument capable of dynamic vapour sorption (DVS) assessment. DVS analysis confirmed that the sorption properties of impregnated spruce wood are comparable to those of non-impregnated spruce wood. However, the higher hysteresis at higher relative humidity is probably due to the presence of crystals in the cell lumina.","PeriodicalId":52851,"journal":{"name":"Les","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45664400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Critical steps and troubleshooting in sample preparation for wood and phloem formation: from sampling to microscopic observation 关键步骤和故障排除在木材和韧皮部形成的样品制备:从采样到微观观察
Les Pub Date : 2022-06-30 DOI: 10.26614/les-wood.2022.v71n01a05
A. Balzano, K. Čufar, Luka Krže, M. Merela
{"title":"Critical steps and troubleshooting in sample preparation for wood and phloem formation: from sampling to microscopic observation","authors":"A. Balzano, K. Čufar, Luka Krže, M. Merela","doi":"10.26614/les-wood.2022.v71n01a05","DOIUrl":"https://doi.org/10.26614/les-wood.2022.v71n01a05","url":null,"abstract":"We present a technical note that supplements published procedures on optimal sample preparation for performing wood and phloem formation analyses. Before beginning sampling, it is important to learn about the characteristics of the tree or shrub species to be investigated. Some tips are given how to use the Trephor tool in the best way, how to remove the outer hard bark (periderm), how microcores should be handled after removal from the tree, and how they should be oriented for embedding in paraffin, and cutting thin sections for microscopy. Possible defects that may result from improper handling are illustrated and discussed. We also present optimal images to accurately identify different cell development stages in phloem and xylem, which is particularly challenging in hardwoods and Mediterranean tree and shrub species.","PeriodicalId":52851,"journal":{"name":"Les","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43408490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Tree-ring chronologies of Picea abies, Larix decidua and Fagus sylvatica along altitudinal gradients 云杉、落叶落叶松和森林Fagus的年轮年代学
Les Pub Date : 2022-06-30 DOI: 10.26614/les-wood.2022.v71n01a04
Klemen Novak, M. de Luis, Nina Škrk, A. Straže, K. Čufar
{"title":"Tree-ring chronologies of Picea abies, Larix decidua and Fagus sylvatica along altitudinal gradients","authors":"Klemen Novak, M. de Luis, Nina Škrk, A. Straže, K. Čufar","doi":"10.26614/les-wood.2022.v71n01a04","DOIUrl":"https://doi.org/10.26614/les-wood.2022.v71n01a04","url":null,"abstract":"The dendrochronological climate signal of Norway spruce (Picea abies), European larch (Larix decidua), and European beech (Fagus sylvatica), among other species, depends on altitude, therefore we have to collect dendrochronological data systematically for each species along altitude gradients. To this end, we established local tree-ring chronologies for the three species along two elevation gradients: (1) Kokra – Jezersko with sites at 750, 780, 950, 1200, 1250, 1380, 1600 m a.s.l., and (2) Bled – Radovna – Krma with sites at 518, 550, 580, 700, 750, 900, 950, 1000, 1200, 1400, 1600, 1760, 1900, 2040 m a.s.l. We present the main characteristics of the chronologies and the results of the dendroclimatological analyses, which show how the climatic factors influence the variation of the tree rings in dependence of altitude and species. We also present the agreement of the different chronologies in terms of standard dendrochronological parameters such as the t-value and discuss the potential use of the presented database.","PeriodicalId":52851,"journal":{"name":"Les","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47419648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Prof. Dr. Leon Oblak received the WoodEMA International Association Annual Award Leon Oblak博士教授获得WoodEMA国际协会年度奖
Les Pub Date : 2021-12-23 DOI: 10.26614/les-wood.2021.v70n02a09
D. Jelačić
{"title":"Prof. Dr. Leon Oblak received the WoodEMA International Association Annual Award","authors":"D. Jelačić","doi":"10.26614/les-wood.2021.v70n02a09","DOIUrl":"https://doi.org/10.26614/les-wood.2021.v70n02a09","url":null,"abstract":"","PeriodicalId":52851,"journal":{"name":"Les","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42848586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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