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REASONS FOR COLOUR CHANGES DURING THERMAL AND HYDROTHERMAL TREATMENT OF WOOD
wood hydrothermal treatment colour chemical changes reasons
2009/11/27
The chemical composition of wood in relation to its thermal and hydrothermal treatment is discussed. The degradation and modification processes, which take place during hydrothermal treatment, are pre...
Does the lichen flora already reflect changes in air quality in the Šalek valley after the construction of cleaning devices in the Šoštanj thermal power plant?
bioindication epiphytic lichens Hypogymnia physodes mapping Pb Cd Zn As
2009/11/27
Lichens are often used as bioindicators of air pollution due to their biology. Their thallus is without any true tissues and organs, the cuticle and roots are not developed. They get all needed substa...
LAND-USE CHANGES AND THE RESULTING SOCIO-ECONOMIC POPULATION STRUCTURE IN THE UPPER GORENJSKA REGION
land-use population socio-economic structure changes
2009/11/26
The paper analyses land-use changes in the Upper Gorenjska region (Slovenia) in the years 1827, 1896, 1979 and 2002. In 1827, 49 % of the land was covered with woods, whereas by 2002 this figure incre...
Changes of ashwood pH-value during CONVENTIONAL drying
ash-wood pH-value drying drying conditions
2009/11/26
Changes of pH of sawn wood during conventional drying were studied. Green ashwood boards (Fraxinus excelsior L.), 25.4 mm in thickness, were exposed to 1 month air drying and to kiln drying using 7 sc...
Influence of selective thinningS on spatial arrangement and social RANK changes of trees in young black alder stands
Alnus glutinosa Gaertn. spatial arrangement self-thinning selective thinning
2009/11/26
Spatial arrangement, self-thinning and social rank changes of trees were analysed in pure even-aged stands of Alnus glutinosa (in north east Slovenia), in the period from the small to larger pole stag...
Changes of soil conditions and floristic composition in black pine forest (Fraxino orni-Pinetum nigrae) and in the forest of beech and Hairy Alpenrose (Rhododendro hirsuti-Fagetum) after the wildfire
intrazonal forest on dolomite consequences of forest fire soil damage and degradation
2009/11/26
We studied soil conditions and floristic comsposition in the forest of beech and Hairy Alpenrose (Rhododendro hirsuti-Fagetum) and in the south-Alpine Austrian black pine forest (Fraxino orni-Pinetum ...
SLOVENIAN FOREST CONDITION SURVEY ON THE 16 X 16 KM GRID IN 1998,CHANGES IN THE PERIOD FROM 1987-1998 AND FOREST CONDITION IN OTHER EUROPEAN COUNTRIES
forest decline tree defoliation survey monitoring of changes Slovenia
2009/11/25
The article presents the results of the 1998 forest condition survey which was carried out on the 16 x 16 km grid. The survey comprised 1008 trees on 43 plots. The average defoliation was 23.5% and 29...
Changes in value-added wood product manufacturer perceptions about certification in the United States from 2002 to 2008
certification United States wood products value-added manufacturers
2009/7/21
Certification is a voluntary mechanism which involves assessing either forest management practices or chain-of-custody tracking through supply chains against a set of standards. Certification is bec...
Changes of Mechanical Properties of Wood under an Unstable State by Heating or Cooling
stress relaxation unstable state temperature history amount of fluidity
2009/3/6
In this paper stress relaxation of water-swollen wood was discussed with two conditions of temperature change, i.e. 1) specimens at 20°C were heated rapidly to 30-80°C, and 2) specimens at 30-80°C wer...
The effects of treatment with NaOH aqueous solution on the shape of Yezo spruce (Picea jezoensis Carr.) and its mechanism were examined by comparison with results for ramie fibers. Wood samples contra...
Effect of Changes in the Moisture Content due to Surrounding Relative Humidity on the Contact Stress in Traditional Mortise and Tenon Joints III
compressed sugi komisen hozo-komisen mortise and tenon change of humidity
2009/3/6
This research is focused on evaluating the efficiency and failure mechanism of joints using a komisen (Japanese traditional square key) of compressed sugi (Japanese ceder ;Cryptomeria japonica D. Don)...
Mechanical Properties of Wood in an Unstable State due to Temperature Changes, and an Analysis of the Relevant Mechanism II
wood block uniform elimination lignin hemicellulose
2009/3/6
In order to prepare wood specimens for subsequent measurements of mechanical properties, we examined the selective and uniform elimination of wood constituents from a 4 mm thick cross section of hino...
Effect of Changes in the Moisture Content due to Surrounding Relative Humidity on the Contact Stress in Traditional Mortise and Tenon Joints II.
komisen compressed wood contact stress mortise and tenon joint
2009/3/6
This research is a continuation of part 11), and focuses on studying the effect of cyclic humidity changes. It also evaluates the anti-relaxation effect by deformation recovery of the komisen(wooden ...
Mechanical Properties of Wood in an Unstable State due to Temperature Changes, and an Analysis of the Relevant Mechanism I.
quenching swollen wood variations of temperature stress relaxation fluidity
2009/3/6
To study mechanical properties of wood exposed to variations of temperature, in this study the swollen wood (water-swollen wood & ethylene glycol-swollen wood) was preheated at 30-180°C and quenched t...
Effect of Changes in the Moisture Content due to Surrounding Relative Humidity on the Contact Stress in Traditional Mortise and Tenon Joints I.
komisen mortise and tenon contact stress compressed sugi
2009/3/6
To understand the stress transmission mechanism in the traditional timber joint, focus was aimed on the contact stress which occurs at the contact surface of mortise and tenon joints. More precisely, ...