Your search resulted in 49 documents. Displaying 25 entries per page.
Comparative studies of natural durability of Japanese cedar (Cryptomeria japonica D. Don) among the geographic cultivates
2006 - IRG/WP 06-10592
Variation of natural durability of Japanese cedar (Cryptomeria japonica D. Don) (also known as Sugi) was investigated by accelerated tests for decay (Fomitopsis palustris (Berk. et Curt.) Murr.) and termite (Reticulitermes speratus Kolbe) attacks on 13 clones of Sugi trees from Kyushu-Okinawa Region (Fukuka, Ooita, Saga, Miyazaki, Kagoshima). For this purpose, 57 twenty-five years old Sugi trees o...
I Usta, K Takata, S Doi
Efficacies of an insecticide and a fungicide for preventing blue-stain of Japanese red pine logs
2006 - IRG/WP 06-20329
We examined blue-stain fungi on Japanese red pine at 3 forests and 2 saw mills in Iwate Prefecture, Japan. The isolated ophiostomatoid fungi were Leptographium sp and Ophiostoma sp. There were 3 routes of the blue-stain; fungal growth from the spore or hypha stuck on the cross cut surfaces, fungal spread through the inner bark by bark beetles and fungal invasion around whorled knot. The larger ext...
H Taniuchi, T Koiwa, H Masuya, S Doi
Tree crown architecture: a tool for decay resistance evaluation
2013 - IRG/WP 13-10793
The variability of natural durability contributes to the bad perception of some wood end-users. In our search, we need to adjust our methods and strategies to estimate natural durability and extract higher value from wood resources. Architectural analysis is essentially a detailed, multilevel, comprehensive and dynamic approach to plant development. Numerous biological process which impact some wo...
N Amusant, J-B Anouhé Say, A Amissa, J Beauchène, F Niamké, E Nicolinni
Efficacies of physical barriers for preventing blue-stain of Japanese red pine logs
2007 - IRG/WP 07-20359
This paper deals with field trials on physical barriers to prevent blue stain on Japanese red pine logs using a fly screen, bark and leaves of Japanese cedar as covering materials. These barriers arrested blue stain and bark beetle attacks to low levels than control for 1 month except covering with a small amount of bark. Covering with the fly screen and a large amount of bark permissibly suppress...
H Taniuchi, T Koiwa, H Masuya, S Doi
Development of boron/linseed oil combined treatment as a low-toxic wood protection. Evaluation of boron fixation and resistance to termites according to Japanese and European standards
2007 - IRG/WP 07-30448
Combinations of boric acid as a first step of treatment and linseed oil as a second step have been performed in order to enhance boron retention to leaching and wood resistance to termites. Classic leaching and termites resistance standards are inappropriate to evaluate this combination which can be considered as both a wood core preservation treatment and a coating.
Japanese Industrial Standard...
F Lyon, M-F Thevenon, Y Imamura, J Gril, A Pizzi
Needs for wood durability research on planted tree species in the tropics
2008 - IRG/WP 08-10651
The area of forest plantation has been expanding especially in tropical Asia since 1990’s. Most of them are developed for pulp and paper industries and planted with fast growing trees. It is expected that wood from those fast growing trees are also used for value added products such as sawn timber. In order to promote the utilization of fast wood as the resource of value added products, natural...
K Yamamoto, T Toma, Ngo Duc Hiep, Nguyen Trong Nhan
Improvement of the Fungal Resistance of Japanese Cedar by the ThermoWood Process
2008 - IRG/WP 08-40422
The effect of the ThermoWood Process on sapwood of the Japanese cedar, Cryptomeria japonica, was investigated. Seven matched specimens were cut from a sapwood board of Japanese cedar and subjected to thermal treatments according to the ThermoWood Process.
The decay resistance and chemical and physical properties of the treated specimens and untreated specimen were investigated. The decay test wa...
I Momohara, T Morita, S Shouho, A Yamaguchi
The effect of different foundation systems against fungal flora in the crawl space of a new wooden Japanese house
2009 - IRG/WP 09-10700
In order to establish novel preventive measures against damage of wooden houses by decay fungi with less-use or no-use of chemicals, we periodically monitored the fungal flora in the crawl space of a new wooden Japanese house build with recyclable and low-environmental load materials at the Research Institute for Sustainable Humanosphere, Kyoto University. We employed either a layer of concrete or...
A Toyoumi, S Horisawa, T Yoshimura, S Doi,Y Imamura
A review of Sitka spruce (Picea sitchensis (Bong.) Carr.) as its Importance and Breeding
2010 - IRG/WP 10-10717
Foresters tend to concentrate on those species which are the easiest to handle silviculturally, and which will produce the greatest volume of generally useful wood in the shortest time. Sitka spruce (Picea sitchensis (Bong.) Carr.), which is a softwood species from the western seaboard of North America with a range extending from southern Alaska to northern California, is one of the pioneer specie...
I Usta, R Despot
Durability of wooden shop-name signage coated with Urushi lacquer and gold leaf attached to the facade of building in Japan
2012 - IRG/WP 12-20493
Wooden shop-name signage plated with gold leaf is one of the characteristics of newly developed westernized commercial buildings appeared after the Great Kanto earthquake of 1923 in Japan. The signage still remains mainly in old districts. The signage with independent letters (Chinese character) shows off the name of the shop with golden colour on the façade of building. The number of these shops...
K Yamamoto, M Kiguchi
Wood Aging. Characteristics of aged Hinoki wood from Japanese historical buildings
2012 - IRG/WP 12-40610
Wood has always played a major role in Japanese traditional culture. More than 90% of buildings listed as a National property or a nationally important cultural property of Japan are constructed with wood. In the ancient capitals Kyoto and Nara, many traditional wooden buildings were inscribed as World Cultural Heritage of the UNESCO. The most famous and the world’s oldest wooden construction st...
M Yokohama, S Kawai
A case study of investigating fungi that affect traditional Japanese shake roof with/without copper plates
2013 - IRG/WP 13-10810
A Japanese traditional shake roof is made from split logs. To keep the roof long, copper (Cu) plates are often inserted between the shakes. It has been thought that Cu elements from copper plates would flow out when a shake roof is exposed to rain and inhibit growth of wood rotting fungi. Actually there are some examples where the Cu plates seem to be effective in preventing fungal damage, but on ...
T Wada, Y Fujiwara, Y Fujii, R Kigawa
The effects of impregnation with secondary metabolite extracted from Ipe on durability of Japanese cedar and beech wood
2013 - IRG/WP 13-30618
Ipe wood is known for its high durability; it has been widely used in exterior structures that are exposed to the weather. In this paper, to increase the durability of less durable wood, Japanese cedar and beech specimens were impregnated with a secondary metabolite from Ipe. In a previous study, secondary metabolites extracted by a Soxhlet extraction method showed antifungal properties. Therefore...
T Iida, R Konuma, K Kawarada
Comparison of moisture loss and its increment during the rehearsal process based on natural drying and water soaking application with or without sealing the trial discs of Common black poplar (Populus nigra L.)
2013 - IRG/WP 13-40639
This study was subjected to be set up to prove the pattern of moisture loss and moisture increment within the same wood samples prepared as the discs (30x23±3 cm diameter) with or without the bark intact during drying and in the duration of the water soaking application. In this concept, wood was exemplified by Common black poplar (Populus nigra L.) of the five 12 year old trees that are grown in...
I Usta
The First Description of Soft-rot Cavity in Waterlogged Archaeological Woods by a Japanese Wood Anatomist Prof. F. Onaka in 1935
2017 - IRG/WP 17-10885
The term soft rot, which was caused by Ascomycetes and Deuteromycetes, was first used by J G Savory in 1954. Soft rot decay can be characterized by cavities within secondary cell walls align along the cellulose microfibrils. Our recent literature search revealed, however, that Prof. F. Onaka in Kyoto University described the soft rot cavities in the waterlogged archaeological woods in detail from ...
Yoon Soo Kim, K Yamamoto
Natural durability of Sextonia rubra, an Amazonian tree species: description and origin
2017 - IRG/WP 17-10887
Sextonia rubra is a tropical tree species belonging to Lauraceae family. In French Guiana, its long lasting heartwood is largely exploited for different purposes including house construction, and furniture making. Decay tests have confirmed S. rubra natural durability, and led us to discover some variability. Rubrynolide and rubrenolide, which are two majors metabolites isolated from the heartwood...
E Houël, A Rodrigues, E Nicolini, O Ngwete, C Duplais, D Stien, N Amusant
The Protective Effect of Different Tree Bark Extractives against Decay Fungi
2017 - IRG/WP 17-30707
There are various modification methods which increase the resistance of wooden materials. Due to recent environmental regulations, there is a need for new and environmentally-friendly wood preservatives. In this study, six different tree bark extractives were evaluated for their wood resistance against fungal degradation. For this purpose, the white rot fungi (Tramates versicolour) and brown rot f...
Ö Özgenç, S Durmaz
Bacterial adhesion to selected wood finishes
2017 - IRG/WP 17-40793
A new generation of furniture, including antibacterial surfaces, should adjust to the changing needs of an ageing population. Respectively, determination of bacterial adhesion on wooden surfaces, finished with various wood finishes or coating is an important topic. The main aims of our work were of a preliminary character. We wanted to state if the existing methods for testing of bacterial adhesio...
M Petrič, D Kekec, J Žigon, K Godič Torkar, K Bohinc
Penetration pathway of oilborne preservative in heartwood of Japanese larch (Larix kaempferi)
2019 - IRG/WP 19-40886
The liquid permeability of Japanese larch (Larix kaempferi) wood is extremely low, especially in the heartwood. It is difficult to achieve the penetration of wood preservatives, which is specified by standards, with pressure treatment of waterborne preservatives. Recently, the protection treatment with an oilborne preservative called “deeper penetration treatment” is commercially available, wh...
H Shibui, T Miyauchi, T Shigeyama, M Ikeda, Y Sugai
Impregnation of wood with antifungal compounds from low-quality tree biomass
2022 - IRG/WP 22-30763
In this paper we have reviewed recent research on the development of bio-based preservative formulations for wood done at the Department of wood science and technology, Ljubljana. Preservative formulations used in this investigation were prepared using plant polyphenols as biocidal agents. These nonstructural components of wood were stilbenes and flavonoids, and were extracted from wood of broken ...
V Vek, I Poljanšek, A Balzano, M Humar, P Oven
The influence of climate changes on Central European forests with an emphasis on Slovenia
2022 - IRG/WP 22-50368
When forests are managed sustainably, they play an essential role in protecting climate and biodiversity. They protect soils and water resources, provide livelihoods, and contribute to the well-being of rural and urban communities. European forests are multifunctional and provide a range of ecosystem services. These include the production of renewable materials that can replace materials with a la...
J Gričar, L Krajnc, M Westergren, S Rus, H Kraigher
Japanese traditional wooden building construction project in Bangkok - Part 2 Verification of termite control method
2023 - IRG/WP 23-11022
We have confirmed the effectiveness in Thailand of chemicals and stainless steel mesh that have been proven effective in Japan.
Stake and container tests were conducted and the following results were obtained:
1. There is no damage on specimens covered with stainless steel mesh, CuAz-treated specimens both stake test and container test.
2. Natural pyrethrin-treated specimens without stainless ...
H Ishiyama, S Murakami
Tree bark as a renewable source of wood protection materials for building applications (BarkBuild)
2023 - IRG/WP 23-30792
The BarkBuild project aims to address climate change mitigation by developing new, sustainable, and long-lasting wood building materials with low environmental impact. The project focuses on developing bark-based wood protection and building formulations that demonstrate technical performance, safety, and sustainability in both outdoor and indoor applications. The research objectives of the projec...
A Treu, M Sipponen
Japanese traditional wooden building construction project in Bangkok - Part 1 Project outline, building implementation and effects
2023 - IRG/WP 23-40992
The purpose of this project is to build new ways to utilize wooden resources in Japan. Japan's forestry industry is in decline despite its abundant forest resources due to a lack of successors and other reasons. Meanwhile, in Southeast Asian countries, reinforced concrete houses, which are not suited to the climate, are on the rise due to a lack of wood and technology. To solve these problems in b...
S Murakami, K Kawaguchi, H Ishiyama