Japanese Wood-Block Prints

1951 ◽  
Vol 71 (1) ◽  
pp. 93
Author(s):  
John E. McCall ◽  
Shizuya Fujikake
Keyword(s):  
Wood Block ◽  
Wood Block Prints

Conserving Japanese Wood-block Prints with a Brief Study of the Materials Used in their Conservation

de arte ◽  
1993 ◽  
Vol 28 (48) ◽  
pp. 44-49
Author(s):  
Jane Colbourne
Keyword(s):  
Wood Block ◽  
Materials Used ◽  
Wood Block Prints

Wen-shu and P'u-hsien. Chinese Wood-Block Prints of the Wan-li Era

Artibus Asiae ◽  
1961 ◽  
Vol 24 (2) ◽  
pp. 87
Author(s):  
Robert Treat Paine
Keyword(s):  
Wood Block ◽  
Chinese Wood ◽  
Wood Block Prints

scholarly journals Increasing the Strength of the Glue Line in the Production of Thermally Modified Wood Paneling

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 253
Author(s):  
Ruslan Rushanovich Safin ◽  
Aigul Ravilevna Shaikhutdinova ◽  
Ruslan Khasanshin ◽  
Shamil Mukhametzyanov ◽  
Albina Safina
Keyword(s):  
Wood Products ◽  
Ultraviolet Rays ◽  
Surface Activation ◽  
Wood Block ◽  
Two Stage ◽  
Adhesion Properties ◽  
Wood Processing ◽  
Ultraviolet Treatment ◽  
Thermally Modified Wood ◽  
Modified Wood

This work is devoted to the study of the effect of ultraviolet rays for the surface activation of pine wood thermally modified at temperatures of 180−240 °C in order to increase the surface roughness, enhance the wettability of thermal wood and the adhesive strength of the glue in the production of wood block furniture panels. Studies were carried out to measure the contact angle of wettability of thermally modified wood samples of pine, as a result of which it was determined that the ultraviolet treatment process contributes to an increase in the adhesion properties of the surface layer of thermally modified wood by more than 13% due to the reactivity of ultraviolet rays to oxidize and degrade ligno-containing wood products. At the same time, the most active process of surface activation takes place during 60 min of ultraviolet irradiation of wood with a total irradiation of at least 125 W/cm2. It was revealed that the combined effect of two-stage wood processing, including preliminary volumetric thermal modification followed by surface ultraviolet treatment, causes an increase in the moisture resistance of glued wood products by 24%. So, if the strength of the glue seam when gluing natural wood samples after boiling decreased by 46%, then the samples that underwent two-stage processing showed a decrease only by 22%. In connection with the results obtained, an improved technology for the production of furniture boards for the manufacture of moisture-resistant wood products is proposed.

Complex environments alter competitive dynamics in fungi

2021 ◽  
Author(s):  
Justin Chan ◽  
Stephen Bonser ◽  
Michael M. Kasumovic ◽  
Jeff Powell ◽  
William Kirkham Cornwell
Keyword(s):  
Interspecific Interactions ◽  
Fungal Species ◽  
Wood Block ◽  
Complex Environments ◽  
Biotic Factor ◽  
Pairwise Interactions ◽  
Agar Media ◽  
Contextual Environment ◽  
Natural Settings ◽  
Natural Communities

Competition is a key biotic factor that often structures natural communities. Many attempts to disentangle how competition shapes natural communities have relied on experiments on simplified systems or through simple mathematical models. But these simplified approaches are limited in their ability to represent the complexity seen in more natural settings. Here, we considered the competitive pairwise dynamics between four saprotrophic fungal species. We tested whether the contextual environment changed these dynamics, repeating competitive experiments in a simple agar media and a more ecologically realistic wood block setting. We found that the competitive outcomes on agar media differed from those within the wood blocks. While superior competitors were identified across all pairwise interactions on agar, within the wood blocks, two of six interactions resulted in deadlock, where neither competitor could breach territory of the other, and one interaction resulted in a reversed competitive outcome. These results suggest that the complexity within natural substrates can alter the strength of interspecific interactions and may contribute to coexistence and the resulting high diversity of fungi often observed within wood.

scholarly journals The relationship between SPAD chlorophyll and disease severity index in Ganoderma-infected oil palm seedlings

2019 ◽  
Vol 17 (3) ◽  
pp. 355-358 ◽  
Author(s):  
M.R.M. Rakib ◽  
A.H. Borhan ◽  
A.N. Jawahir
Keyword(s):  
Chlorophyll Content ◽  
Disease Severity ◽  
Oil Palm ◽  
Single Photon ◽  
Linear Trend ◽  
Severity Index ◽  
Quadratic Model ◽  
Wood Block ◽  
Disease Severity Index ◽  
The Relationship

Establishment of disease in oil palm seedlings through artificial inoculation of Ganoderma are widely used for studies of various aspects of plant pathology, including epidemiology, etiology, disease resistance, host-parasite interaction and disease control. The estimation of chlorophyll content in the infected seedlings possibly could provide a good indicator for degree of disease or infection, and changes during pathogenesis. Thus, the objective of this study was to evaluate the relationship between disease severity index (DSI) and chlorophyll content in Ganoderma infected oil palm seedlings. Three-month-old oil palm seedlings were infected with Ganoderma inoculum on rubber wood block (RWB), where 44 isolates of Ganoderma were tested. Disease severity index (DSI) and chlorophyll content using a single-photon avalanche diode (SPAD) meter were recorded at 4 weeks interval for a period of 24 weeks after inoculation (WAI). Pearson's correlation analysis and regression analysis were performed to evaluate the relationship between the variables. It was found that the relationship between DSI and SPAD chlorophyll value was inversely proportional (R = -0.92) in a linear trend (R2 = 0.85). Furthermore, the increasing trend of the DSI across the weeks were fitted in a quadratic model (R2 = 0.99). In contrast, the SPAD chlorophyll value declined in a linear trend (R2 = 0.98). The SPAD chlorophyll value could be considered as a better alternative over the DSI as the SPAD chlorophyll value was strongly related to DSI, as well as able to detect physiological changes in the infected oil palm seedlings at the early stages of pathogenesis. J Bangladesh Agril Univ 17(3): 355–358, 2019

scholarly journals Identification of white rot fungus CP9 and its potential application in biopulping

2018 ◽  
Vol 14 (4) ◽  
pp. 721-726
Author(s):  
Nguyen Thi Hong Lien ◽  
Nguyen Van Hieu ◽  
Luong Thi Hong ◽  
Hy Tuan Anh ◽  
Phan Thi Hong Thao
Keyword(s):  
Rice Straw ◽  
Lignin Peroxidase ◽  
Paper Industry ◽  
Morphological Characteristics ◽  
White Rot Fungi ◽  
White Rot ◽  
White Rot Fungus ◽  
Wood Block ◽  
New Production ◽  
Cellulosic Fibers

Wood-rotting fungi represent an important component of forest ecosystems. Among them, white-rot fungi are the most efficient lignin degraders. Biopulping using white-rot fungi in pretreatment of the materials, is one of the solutions to overcome disadvantages of traditional production methods. Today, the isolation and screening of lignin degrading fungi capable for application in biopulping are of keen interest in Vietnam. The use of non–wood, plant fibres in pulp and paper industry, special, agricultural residuces such as rice and wheat straw, sugarcane baggase, cornstalks etc is the new production toward, potential, serving sustainable development. The fungus CP9, which possessed high ligninolytic activity, was identified and studied in pretreatment of rice straw for biopulping. The fruiting bodies of strain CP9 were effuse on trunk. The hymenium was porous and brown white with short tubes, the white mycelia penetrated wood block. The colony was off-white, blossom, irregularly circular. The mycelia were thick and closely bound together. Beside lignin, this fungus could degrade other substrates such as casein, carboxymethyl cellulose and starch. Biological and morphological characteristics of the fungus CP9 suggested its placement in subdivision Basidiomycota. Combined with the results of phylogenetic analysis, which showed 99% similarity of the fungus with species Leiotrametes lactinea, our strain was named as Leiotrametes lactinea CP9. This fungus could grow well on rice straw under solid state fermentation. Pretreatment of rice straw using L. lactinea CP9 was based on the activity of fungal lignin peroxidase and laccase. After 20 days, the residual enzyme activity was of 21.6 and 18.4 nkat/g material for lignin peroxidase and laccase, respectively. Pretreatment significantly improved the quality of straw, as lignin loss of 38% while cellulosic fibers were comparatively well preserved.

Development of “Colorless Wood Block” and Its Natural Hierarchical Structure

2020 ◽  
Vol 74 (11) ◽  
pp. 1071-1075
Author(s):  
Yoshiki Horikawa
Keyword(s):  
Hierarchical Structure ◽  
Wood Block

scholarly journals Wood Block Printing in the Kamakura Period

1965 ◽  
Vol 14 (1) ◽  
pp. 291-294
Author(s):  
Joten Nodomi
Keyword(s):  
Wood Block ◽  
Kamakura Period

Study on the Mechanical Properties and Seismic Performance of Beam-Column Joints of Wooden Structure Building

2013 ◽  
Vol 483 ◽  
pp. 305-308
Author(s):  
Li Wen Luan ◽  
Zhong Tao
Keyword(s):  
Mechanical Properties ◽  
Uniform Design ◽  
Final Analysis ◽  
Test Material ◽  
Geometrical Parameters ◽  
Wood Block ◽  
Element Analysis ◽  
Seismic Safety ◽  
Software Analysis ◽  
Wooden Structure

This paper mainly depends on experiment. Take theory and software analysis as supplement. Using pine and fir as test material, the quantitative analysis, using uniform design method to qualitative pine, fir wood block the relationship between mechanical properties and geometrical parameters in the case of triangle, failure characteristics through experimental phenomenon of different materials and different sizes of wood in the triangle block pressure, finally using finite element analysis software ANSYS/LS-DYNA to simulate and analyze test. By comparing the analysis result of test and software, find out the problems and corresponding correction. The final analysis laid the foundation for the whole static wood structure analysis and dynamic. To provide scientific and technical support for rural residential "seismic safety engineering", thus forming the new wooden structure node and reinforcement for clause.

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