The potential of improving wood preservative penetration into glued wood products bonded with one-component polyurethane by discontinuous adhesive bondline design

2021 ◽  
Author(s):  
Edgars Kuka ◽  
Ingeborga Andersone ◽  
Nina Kurnosova ◽  
Dace Cirule ◽  
Bruno Andersons ◽  
...  
Keyword(s):  
Wood Preservative ◽  
Wood Products

scholarly journals The Possibility of Propolis Extract Application in Wood Protection

Forests ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 465 ◽  
Author(s):  
Magdalena Woźniak ◽  
Patrycja Kwaśniewska-Sip ◽  
Agnieszka Waśkiewicz ◽  
Grzegorz Cofta ◽  
Izabela Ratajczak
Keyword(s):  
Gravimetric Method ◽  
Untreated Wood ◽  
Brown Rot ◽  
Wood Preservative ◽  
Wood Products ◽  
Wood Structure ◽  
Propolis Extract ◽  
Wood Protection ◽  
Natural Substances ◽  
Wood Impregnation

Nowadays, there is a growing interest in extending the service life of wood and wood products by applying natural substances that are harmless to humans and the environment. In this paper, propolis was used as an eco-friendly wood preservative. The aim of this study was to determine the resistance of Scots pine wood treated with the propolis extract against brown-rot fungus Coniophora puteana. The wood biodegradation was assessed by gravimetric method, as well as by the analysis of ergosterol concentration in decayed wood and by the determination of changes in the wood structure by means of Fourier transform infrared spectroscopy. The results indicated that the impregnation of wood with propolis extract above 12% concentration limited fungal decay. The mass loss of wood treated with 18.9% propolis extract was 2.3% and was over 21 times lower than that for untreated wood. The analysis of ergosterol content and the changes in wood structure also confirmed that the propolis extract above 12% concentration protected wood against decay caused by C. puteana. Moreover, the propolis extract used in wood impregnation was rich in phenolic compounds, mainly chrysin, pinocembrin and galangin, which possess antimicrobial activity. The obtained results indicate that the extract of Polish propolis can be a promising natural wood preservative, safe for humans and the natural environment.

Residential tornado safe room from commodity wood products – impact and wind pressure testing

2018 ◽  
Author(s):  
Robert H. Falk ◽  
James J. Bridwell ◽  
C. Adam Senalik ◽  
Marshall Begel
Keyword(s):  
Wood Products ◽  
Wind Pressure ◽  
Pressure Testing

Der Spielraum bei der Vermarktung von Waldleistungen ist eingeschränkt (Essay) | The scope for the commercialization of forest services is limited (essay)

2009 ◽  
Vol 160 (8) ◽  
pp. 228-231
Author(s):  
Hansruedi Walther
Keyword(s):  
Private Property ◽  
Legal Framework ◽  
Third Parties ◽  
Wood Products ◽  
Forest Owner ◽  
Free Access ◽  
School Class ◽  
Market Niche ◽  
The Right ◽  
Exclusive Right

A forest owner can only commercialize non-wood products and services within a tightly restricted market niche. On account of free access being permitted to the forest it is impossible to deny to third parties the consumption of many non-wood products and services: everybody has the right to be in the forest for recreation. As a result many non-wood services cannot be commercialized by the forest owner, or not exclusively. What would seem unthinkable elsewhere on private property seems to be taken for granted in the forest: third parties may take products from the forest and even sell them without being the forest owners. For certain nonwood services or products, such as the installation of rope parks or for burial in the forest, the organizer must conclude an agreement with the forest owner or draw up a contract for servitude or benefit. In addition, for these activities a permit from the Forestry Department is necessary. On the other hand, for an itinerant school class or for the production of forest honey neither a binding regulation with the forest owner nor a permit from the Forestry service is necessary, provided that no constructions are erected in the forest. The only exclusive right which remains to the forest owner, besides the sale of his property, is the exploitation of his trees within the legal framework.

Senkenanrechnung gemäss Kyoto-Protokoll: Perspektiven für die Waldwirtschaft | Taking carbon sinks into account according to the Kyoto Protocol: a prospect for the forest sector

2008 ◽  
Vol 159 (9) ◽  
pp. 296-302
Author(s):  
Richard Volz
Keyword(s):  
Kyoto Protocol ◽  
Emissions Trading ◽  
Wood Products ◽  
Forest Sector ◽  
Carbon Sinks ◽  
Forest Owners ◽  
Trading Market ◽  
Reduce Emissions ◽  
Emission Reduction Target ◽  
Actual Target

The Kyoto Protocol makes provisions for carbon sinks from forest management to be taken into account as a contribution towards fulfilling a country's emission reduction target. Additional emission allowances are allocated for these forest carbon sinks. If Switzerland uses this extra contingent of allowances to the full it would then only have to reduce emissions by 4.5% instead of the actual target of 8%. Emission allowances from carbon sinks can be traded on the emissions trading market and be claimed by forest owners. An assessment of the income that could be anticipated was carried out in four forestry companies: with the CO2 price set at 10 CHF per ton it was seen that a potential revenue of between 6 and 71 CHF per hectare and year could be realised. However, the legal basis for allocating emission allowances from carbon sinks to forest owners has yet to be created. In view of the fact that the two chambers of Parliament refused the introduction of the Forests Act Revision Bill, it is not clear if and in what form this will be done. For the period after 2012, the rules will be renegotiated at the international level and it is expected that the carbon stored in harvested wood products will be taken into account. Accordingly, wood removed from the forest would no longer be automatically counted as a CO2 source in the emission balance.

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