Journal of Wood Science

https://link.springer.com/journal/10086

List of Papers (Total 104)

Effect of dormancy on the development of phloem fiber clusters

The development of phloem fibers was investigated in poplars grown under artificially fixed conditions and under an artificially shortened annual cycle system that includes a dormancy phase. The phloem tissues in these trees formed two- or three-layer fiber clusters; however, clusters in trees that underwent periodic dormancy were larger than those in trees that did not...

Evaluating dimensional stability in solid wood: a review of current practice

The degree with which wood shrinks and swells with changing moisture content is an important property which determines its suitability for different applications. This property, known as dimensional stability, is often a target property for improvement in wood modification research. Its importance makes it a commonly quantified wood property. Despite this, methods for measuring...

Surface growth stress and wood properties of 8-year-old planted Big-leaf mahogany (Swietenia macrophylla King) from different landrace provenances and trial sites in the Philippines

The scarcity of timber to supply the wood-based industries is one of the prevailing problems worldwide. Tree plantations are the remaining solutions to subdue the shortage of raw materials, at the same time sequester atmospheric CO2 in its biomass to reduce global warming. Planting Big-leaf mahogany (Swietenia macrophylla King) contributes valuable economic inputs to small tree...

Preparation and properties of a coniferin enantiomer

l-Coniferin (1L), which is an enantiomer of natural coniferin (d-coniferin (1D)), was prepared from l-glucose according to the conventional method for compound 1D. The reactivity of l-glucose and its derivatives was found to be almost same as that of the corresponding d-glucose and its derivatives during the preparation for compound 1L. Compound 1L showed resistance toward...

Microcrack propagation in transverse surface from heartwood to sapwood during drying

Microcracks, which are difficult to be observed with naked eyes, occur on the transverse surface during the first stage of wood drying. The precise investigation of their appearance is critical for understanding the mechanism of crack occurrence and propagation, which influence the properties of wood. In this study, the location and time difference of microcrack occurrence on the...

Evaluation of rolling shear modulus and strength of Japanese cedar cross-laminated timber (CLT) laminae

Cross-laminated timber (CLT) panels are fabricated with their layers stacked crosswise. Owing to the low shear modulus and strength in the rolling shear direction, the shear properties of cross-layers influence the overall deflection and shear capacities of CLT panels. The aim of the present study is to determine the rolling shear properties of Japanese cedar and investigate how...

Development of bamboo scrimber: a literature review

Bamboo fiber-based composite made from crushed bamboo fiber, termed bamboo scrimber, has gained particular interest of researchers and manufacturers on account of its excellent mechanical characteristics and design. This paper reviewed the available literature on the state of the art of bamboo scrimber including the developing history and current production technology of high...

Mechanical and physical properties of Cross-Laminated Timber made from Acacia mangium wood as function of adhesive types

In this study, three-layered Cross-Laminated Timber (CLT) manufactured from Acacia mangium wood panels were developed by using two different types of adhesives, namely, phenol resorcinol formaldehyde (PRF) and one-component polyurethane (PUR). The aim of this work is to investigate and compare the physical and mechanical properties of CLT manufactured using PRF and PUR adhesives...

Isolation of diterpenoids from sugi wood-drying byproducts and their bioactivities

Diterpenoids are the main components of the byproducts discharged from sugi wood-drying process (BWP), making BWP a source of these useful compounds. Since there is no method for purifying these compounds from BWP, we sought to develop one. In this study, seven diterpenoids compounds were isolated: abietatriene (I), phyllocladenes (II-i and II-ii; a complex of isophyllocladene...

Industrial utilizations of water-soluble sulfuric acid lignin prepared by hydrothermal treatment as flocculant and dispersant

Sulfuric acid lignin (SAL) is a byproduct of the acid saccharification of lignocellulosic materials for bio-fuel generation. The recalcitrant and highly complex structure of SAL significantly limits its industrial use, making it a useless industrial waste. In a previous study, we proposed a hydrothermal reaction for SAL that can convert it into water-soluble compounds (HSALs...

Selective fluorescence labeling: time-lapse enzyme visualization during sugarcane hydrolysis

Enzymatic biomass saccharification is an important process for bioethanol production. Hitherto, numerous cellulase cocktails (crude enzyme) have been developed to improve enzymatic activity. For this purpose, the synergy of incorporating hydrolase functionality within a cellulase cocktail is a key function. However, such synergistic action, by potentially numerous different...

The effects of wetting and scratching pretreatment of veneers on shear strength of binderless plywood made from sugi (Japanese cedar, Cryptomeria japonica)

To produce practicable binderless laminated veneer lumber (LVL) and plywood, their water resistance needs to be improved. The objective of this study was to manufacture highly water-resistant binderless plywood from sugi (Japanese cedar, Cryptomeria japonica), basing on a self-bonding mechanism, without any resins or powders. To achieve this, a pretreatment of wetting and...

Partial compression strength of sugi (Japanese cedar, Cryptomeria japonica) wood near the pith perpendicular to the grain

It was reported that sugi (Japanese cedar, Cryptomeria japonica) boards with pith had a greater partial compression strength perpendicular to the grain (σe) than sugi boards without pith. However, the reason for the superior strength of sugi boards with pith remains unclear. In this study, as the first step to elucidate the reason, we report the effects of loading direction...

A finite element model of semi-rigid mortise-and-tenon joint considering glue line and friction coefficient

The aim of this study is to build a new numerical model of a mortise-and-tenon joint based on the finite element method (FEM) considering glue line and friction coefficient to analyze the semi-rigid wood joint. Firstly, the friction coefficient, glue distributions and strengths of the mortise-and-tenon joint were determined by experimental methods. Secondly, these parameters were...

Performance study about a new kind wood fiber filter element utilized in capturing diesel particulate material

A new kind diesel particulate filter (DPF) with gear-shaped wood fiber filter element is researched and it has very low cost and less requirement for fuel quality. In this paper, the mathematical models of the filtration resistance and the structural parameters of the wood fiber filter element were established first. Then by SEM, the advantages of this material can be proved...

Effects of preheating temperature, preheating time and their interaction on the sandwich structure formation and density profile of sandwich compressed wood

Effects of preheating times (4, 8, and 12 min), preheating temperatures (75–210 °C, with 15 °C interval), and their interactions on structures and density profiles of sandwich compressed poplar wood (Populus × euramericana cv. ‘Neva’) were studied to achieve better control of the position(s) of compressed layer(s), with the aim of better utilization of the low-density wood...

Totally chlorine-free bleaching of prehydrolysis soda pulp from plantation hardwoods consisting of various lignin structures

The process of prehydrolysis followed by soda-anthraquinone (AQ) cooking and totally chlorine-free (TCF) bleaching with peroxymonosulfuric acid (Psa) was investigated to develop a biorefinery process. Eucalyptus globulus, showing a high syringaldehyde (Sa) to vanillin (Va) molar ratio after nitrobenzene oxidation, was utilized. Xylooligosaccharide yield in the prehydrolysate (PHL...

Bayesian modeling of volatile organic compound emissions from three softwoods in Hokkaido, Japan

We used a small chamber method to examine volatile organic compound (VOC) emissions such as α-pinene, β-pinene, and limonene, from three softwood species in Hokkaido, northern Japan. Tests were conducted for 4 weeks to investigate how the rate of VOC emission changed over time. All VOC emission rates rapidly decreased and could be explained by the sum of two exponential functions...

Development of bark-based adhesives for plywood: utilization of flavonoid compounds from bark and wood. II

Although many conventional adhesives for plywood are formulated with tannins (polyflavanoid compounds) extracted from bark or wood, adhesives using tannin directly without extraction from the bark have also been made. In 2003, the first bark particle (< 63 μm) adhesive was developed from radiata pine bark. In this present study, the quality of the bark adhesive has been improved...

Improvement of surface photostability of bamboo scrimber by application of organic UV absorber coatings

Improving the durability of biological materials is essential for expanding their application areas. In this study, an organic ultraviolet (UV) shielding layer (coating) composed of a UV-curable paint, ethyl acetate, anhydrous alcohol, and an organic UV absorber is constructed on the surface of outdoor bamboo scrimber (OBS). The behaviour of OBS with or without this coating was...

Comparative evaluations of lignocellulose reactivity and usability in transgenic rice plants with altered lignin composition

The aromatic composition of lignins is considered an important trait that affects the physico-chemical properties of lignocellulosic biomass. However, our knowledge of the relationship between lignin structure and biomass utilization properties remains limited, especially in monocotyledonous grass species, despite their potential as biomass feedstocks. In this study, we used...

Mechanical properties of wood/plastic composites formed using wood flour produced by wet ball-milling under various milling times and drying methods

The objective of this study was to investigate the mechanical properties of wood/plastic composites (WPCs) produced using wood flour (WF) prepared by wet ball-milling under various milling times (0–120 min) and drying methods (freeze- or heat drying). The drying method did not affect the particle size distribution, shape, or specific surface area of WF at milling times shorter...

Thermal expansion of wood at different equilibrium moisture contents

The measurement of wood thermal expansion at fixed values of moisture content (MC) between the dry state and the cell wall saturation point is a very difficult task, as MC varies with temperature. Being hygroscopic deformations much larger than thermal ones, in order to evaluate the latter, when changing temperature also relative humidity should be adapted. To achieve this goal a...

Isolation, structure determination and structure–activity relationship of anti-toxoplasma triterpenoids from Quercus crispula Blume outer bark

Toxoplasma gondii is an intracellular protozoan parasite of which infection can result in serious symptoms for fetuses or people who have weakened immune system. In our effort to discover novel anti-toxoplasma substances from tree barks, only outer bark extract from Quercus crispula Blume (mizunara) was revealed to show potent anti-toxoplasma activity. Isolation of the active...