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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...
Effects of Delignifying Treatments on Mechano-sorptive Creep of Wood II
bending creep sodium chlorite method superposition principle creep-set memory
2009/3/6
As an additional step to explain the mechanism of mechano-sorptive (MS) creep, radial specimens of hinoki (Chamaecyparis obtuse Endl.) were subjected to different levels of delignification, and the ef...
Effects of Delignifying Treatments on Mechano-sorptive Creep of Wood I.
bending creep moisture cycling superposition principle MS creep coefficient
2009/3/6
Mechano-sorptive(MS)creep of wood occurs by the interaction of mechanical stress and moisture sorption. While there are different hypotheses on mechanism of this complicated phenomenon, knowledge on t...
The Effect of Irradiation Wavelength on the Discoloration of Wood
discoloration photo-bleaching photo-darkening wavelength wood
2009/3/6
Six wood species were exposed to UV and visible light (278 nm to 496 nm) with narrow band gaps (20 nm), and the effects of wavelength on their discoloration patterns were investigated. Light-colored ...
The Chemical Analysis of Wood Using ToF-SIMS
ToF-SIMS lignin extractives surface analysis cell wall
2009/3/6
Time-of-flight secondary ion mass spectrometry (ToF-SIMS) is a powerful technique that provides chemical information about the surface of a solid sample and does not need any pretreatments. The signi...
Effects of Fire Retardant Chemicals and Retention on Heat Release Rate of Wood
heat release phosphorus compound boron compound cone calorimeter fire retardant
2009/3/6
Heat release of interior materials is an important fire property which influences propagation and enlargement of room fires. In this study, nine kinds of fire retardant chemicals were impregnated int...
Effect of a Wood Preservative Used as a Surface Treatment on Slightly-Decayed Wood Caused by Serpula lacrymans
Serpula lacrymans surface treatment oil-borne wood preservative subsequent treatment
2009/3/6
To establish methods of on-site preservative treatment of decayed wood, we investigated the effects of a wood preservative used as a surface treatment on slightly-decayed wood caused by Serpula lacry...
The Mechanism of Liquid Movement in a Wood Cell Cavity by Continuous Visual Observation I.
liquid penetration visual continuous observation degree of suction tracheid
2009/3/6
In this research, samples of heartwood from three softwood species (hinoki, Douglas-fir and sugi) were treated by 1)hot water extraction ; 2)compression perpendicular to grain ; and 3)a method combini...
Mechanical Properties of Wood in an Unstable State due to Temperature Changes, and Analysis of the Relevant Mechanism V.
quenching thermal expansion thermal decomposition destabilization
2009/3/6
In order to define the effects of thermal expansion and thermal decomposition on the destabilization of quenched wood, we measured the stress relaxation of steam-treated wood and oven-dried wood under...
Evaluation of Optimized Conditions of Modified Kraft-Anthraquinone Cooking Processes Using Laboratory Wood-Cooking Equipment
kraft pulp continuous cooking anthraquinone hardwood laboratory equipment
2009/3/6
Various kinds of modified cooking methods have been used in many kraft pulp mills to improve properties of pulp from wood. Furthermore, anthraquinone compounds have been used as cooking additives to i...
Roughness Evaluation of Machined Surfaces of Wood
roughness evaluation machined surface anatomical roughness
2009/3/6
Roughness of machined surfaces of wood has been studied for a long time, since it is an important measure for evaluating the machining process employed and the quality of machined products. It is, ho...
Ergonomic Design of Wood-Based Raised Bed for Horticultural Therapy
horticultural therapy raised bed elder standing posture
2009/3/6
The purpose of this study was to obtain the basic data required to design a raised bed for plants suitable for the horticultural therapy in which able-bodied or frail elderly persons can perform garde...
Preparation and Physical Properties of Wood-Lignophenol Composites
phase-separation system lignophenol wood-lignophenol composite water absorption
2009/3/6
Lignophenols were prepared through a phase-separation system composed of p-cresol and sulfuric acid. Composites of wood meals and lignophenols (Wood-Lignophenol composites) were molded by hot-pressing...
Binder-less Wood Chip Insulation Panel for Building Use Made from Wood Processing Residues and Wastes V.
insulation panel sugi bark thermal conductivity drop impact
2009/3/6
In this series of studies, a manufacturing technology was developed which uses wood flakes or shavings for binder-less insulation panels used in buildings. This paper describes the use of sugi (Crypt...
Fine Structure Changes of Wood during Moisture Adsorption and Desorption Process Analyzed by X-ray Diffraction Measurement
X-ray diffraction moisture condition differential scanning calorimeter thermogravimetric measurement
2009/3/6
To investigate the fine structure of wood in the non-equilibrium moisture condition, X-ray diffraction (XRD) analysis was conducted during moisture content changes in Japanese red pine specimens. The...