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Study on damage and fracture characteristics of wood based on acoustic emission b-value and seismic magnitude difference entropy J. Wood Sci. (IF 2.9) Pub Date : 2024-03-07 Ming Li, Yue Zhao, Feilong Mao, Saiyin Fang, Gezhou Qin, Ning Xu, Daigen Zhu
To assess the damage and fracture behavior of wood under load, a wood damage assessment method was proposed based on acoustic emission (AE) b-values and seismic magnitude difference entropy. First, AE signals from Pinus sylvestris var. mongolica (softwood) and Zelkova schneideriana (hardwood) specimens were collected separately at a sampling frequency of 500 kHz in a three-point bending test. Then
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Research on wind pressure characteristics of traditional timber buildings: a case study of the main hall of Shisi Temple J. Wood Sci. (IF 2.9) Pub Date : 2024-02-10 Xiaoyue Gao, Qing Chun, Yidan Han
Traditional timber buildings are sensitive to wind action. Studying the wind pressure characteristics is the premise for the preventive conservation of traditional timber buildings. To investigate the computational fluid dynamics (CFD) numerical simulation method for wind pressure on traditional timber buildings, a typical traditional timber building, the main hall of Shisi Temple, is chosen as a case
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Correction: Shear strength properties of hybrid (hinoki cypress and Japanese cedar) cross-laminated timber J. Wood Sci. (IF 2.9) Pub Date : 2024-02-07 Seiichiro Ukyo, Atsushi Miyatake, Kenta Shindo, Yasushi Hiramatsu
Correction: J Wood Sci (2021) 67:23 https://doi.org/10.1186/s10086-021-01954-y In the calculation of normal and shear stress in each layer using Eqs. 7a–8b, there was an error in inputting the modulus of elasticity for Hinoki and Sugi. Erroneously, values of 12.5 GPa and 8.6 GPa were used, respectively, instead of the correct elastic moduli listed in Table 1. It should be noted that these erroneously
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Evaluation method for embedment stiffness of metal washers in bolted timber joints using torque gradient and nut factor J. Wood Sci. (IF 2.9) Pub Date : 2024-01-29 Doppo Matsubara, Masaki Teranishi, Takuro Mori
Assessing the residual performance of timber joints affected by decay is important for seismic diagnosis and reinforcement of timber structures. This study introduces a method to evaluate the embedment stiffness of metal washers in bolted timber joints using a torque wrench. Formulas for the embedment stiffness of metal washers using the torque gradient (the gradient of the tightening torque against
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Three-dimensional modeling of moisture transport in wood using near-infrared hyperspectral imaging and X-ray computed tomography in conjunction with finite element analysis J. Wood Sci. (IF 2.9) Pub Date : 2024-01-26 Wenpeng Zeng, Takaaki Fujimoto, Tetsuya Inagaki, Satoru Tsuchikawa, Te Ma
In past studies, finite element analysis (FEA) methods have been used to simulate the thermal and moisture coupling of wood. However, challenges remain in achieving high-quality three-dimensional (3D) simulations, mainly because of the heterogeneous and complex structure of wood and its difficult-to-detect internal structure, which makes modeling challenging, in addition to the lack of robust experimental
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A rolling shear analysis-based method for determining the apparent stiffness and bending capacity of CLT panel under out-of-plane load J. Wood Sci. (IF 2.9) Pub Date : 2024-01-24 Zirui Huang, Yuling Bian, Chun Ni
Most of the currently employed methods, such as Gamma method and shear analogy method, to estimate the bending stiffness and bending capacity of cross-laminated timber (CLT) beams, are computationally extensive. In our previous study, a rolling shear analysis (RSA)-based method, which simplifies the calculation, was developed to determine the shearing capacity of CLT beams. In the present study, the
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Effect of stacking position on drying rate during radio-frequency vacuum combined with mechanical press drying of Douglas-fir and Radiata pine J. Wood Sci. (IF 2.9) Pub Date : 2024-01-23 Changjin Lee
In this study, the effect of stacking position in the dryer on the drying rate during radio-frequency vacuum combined with mechanical press (RF/VP) drying was investigated for Douglas-fir and Radiata pine. Drying test was performed at a temperature of 40 °C using RF/VP dryer with approximately 3 m3. The results showed that the stacking position has a significant effect on the drying rate, with a more
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Liquid-phase water permeation pathways on outer-bark surfaces of teak (Tectona grandis): a tropical deciduous hardwood J. Wood Sci. (IF 2.9) Pub Date : 2024-01-16 Hiroyuki Matsunaga, Naoko Matsuo, Takahisa Nakai, Hisashi Abe
It has recently been suggested that processes related to water uptake from the tree-stem surface, such as water vapor exchange and rainwater permeation, have implications for forest hydrology. However, few studies have investigated stem surface water uptake itself, and the water permeation pathway has not been elucidated in detail. Based on previous findings that trees with outer bark composed mainly
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Determination of nuclear magnetic resonance surface relaxivity for the macropore system from wood cell lumen J. Wood Sci. (IF 2.9) Pub Date : 2024-01-11 Zhi Jin, Yuejin Fu, Qian Chen, Zhen Zeng
To determine the surface relaxivity of pores plays a vital role in the application of time-domain nuclear magnetic resonance (TD-NMR) technology to porous structure characterization for wood. Currently, the surface relaxivity of pores is calibrated using a standard sample with a pore size of the same order as the wood pore system. However, the uniformly distributed pore size of standard sample is unfit
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Environmental impacts of structural lumber production in Japan J. Wood Sci. (IF 2.9) Pub Date : 2024-01-05 Katsuyuki Nakano, Masahiro Koide, Yuta Yamada, Takuya Ogawa, Nobuaki Hattori
Low-rise buildings in Japan are predominantly made of wood. Furthermore, the government promotes the use of wood in mid- and high-rise buildings to tackle climate change. Therefore, the environmental impact of structural lumber should be assessed. In this study, we evaluated greenhouse gas (GHG) emissions and resource consumption associated with structural lumber production using life cycle assessment
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Regression algorithms-driven mechanical properties prediction of angle bracket connection on cross-laminated timber structures J. Wood Sci. (IF 2.9) Pub Date : 2024-01-05 Zhe Wu, Lin Chen, Haibei Xiong
The construction of structures using cross-laminated timber (CLT) has grown in popularity as a result of its environmentally friendly and high-strength characteristics. The primary function of angle bracket connections is to resist the force of CLT structures under horizontal forces, which is essential to ensure the seismic resilience and ductility of CLT structures. A regression algorithms-driven
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Modeling of radial growth curves and radial variation of basic density in Chamaecyparis obtusa planted in two progeny test sites J. Wood Sci. (IF 2.9) Pub Date : 2024-01-03 Yusuke Takahashi, Futoshi Ishiguri, Michinari Matsushita, Ikumi Nezu, Jyunichi Ohshima, Shinso Yokota, Akira Tamura, Miyoko Tsubomura, Makoto Takahashi
The objectives of the present study are to clarify the effect of macro- and micro-environment on the radial growth patterns and radial variation patterns of basic density in hinoki cypress (Chamaecyparis obtusa (Sieb. et Zucc.) Endl.). We evaluated the radial variation patterns of cumulative annual ring width (as radial growth pattern) and basic density by modeling methods using hinoki cypress 36 families
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Mechanical properties of laminated bamboo lumber N-finity according to ISO 23478-2022 J. Wood Sci. (IF 2.9) Pub Date : 2024-01-02 Layth S. Al-Rukaibawi, Mansour Kachichian, György Károlyi
This research used the new ISO 23478-2022 standard as a reference for the calculation of mechanical properties of N-finity, and to understand the failure modes in compression. Previous studies have investigated the mechanical properties of laminated bamboo lumber (LBL), however no study has evaluated the mechanical properties of LBL according to the recently published ISO 23478-2022. The compression
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Characterization of microbial communities during Grifola frondosa (maitake) wood log cultivation J. Wood Sci. (IF 2.9) Pub Date : 2023-12-09 Fu-Chia Chen, Taichi Motoda, Ichiro Kamei, Yoshio Kijidani
The method used to cultivate the popular Japanese mushroom Grifola frondosa (maitake), called 'wood log cultivation', comprised two steps: (1) the mycelium is grown around a wood log in a plastic bag, and (2) the mycelium that has spread on the wood log is transferred into casing substrates in a forest. This method is still popular in Japan due to its low cost and high-quality crop production. The
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Evaluation of increase in loss tangent from longitudinal vibration of wood log by considering apparent density difference between sapwood and heartwood caused by moisture content J. Wood Sci. (IF 2.9) Pub Date : 2023-12-08 Toshiyuki Fukui, Yoshiyuki Yanase, Yoshihisa Fujii
This study confirmed that the loss tangent (or tangent loss, tan δ) obtained from the longitudinal vibration of a wood log increases with the apparent density difference between sapwood and heartwood, owing to moisture content difference. The reason for this was estimated to be the shear stress occurring when the longitudinal vibration is excited from the calculation of the longitudinal vibration equation
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Transition in viscoelastic properties within successive annual rings of radiata pine (Pinus radiata) J. Wood Sci. (IF 2.9) Pub Date : 2023-12-03 Hiroaki Horiyama, Keisuke Kojiro, Yuzo Furuta
Dynamic mechanical analysis (DMA) measurements of water-saturated radiata pine wood in the temperature range from 0 ℃ to 100 ℃ were focused to clarify the transition in viscoelastic properties within successive annual rings. Four radially consecutive specimens were taken per annual ring and DMA measurements in the tangential direction were performed using these specimens. The following results were
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Investigation of mechanical properties and elucidation of factors affecting wood-based structural panels under embedment stress with a circular dowel II: detailed observation for plywood and OSB using DIC and CT scanning J. Wood Sci. (IF 2.9) Pub Date : 2023-11-27 Ryutaro Sudo, Kenji Aoki
Although embedment properties are vital to timber engineering, the behavior and strain distributions in wood-based panels have not been clarified in detail. Our early studies suggested four possible causes of failure behavior and strain distribution: (i) two types of failure behavior (in-plane and out-of-plane failure); (ii) enlargement of the stress-spreading range with increasing load step; (iii)
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Developing structural sandwich panels for energy-efficient wall applications using laminated oil palm wood and rubberwood-based plywood/oriented strand board J. Wood Sci. (IF 2.9) Pub Date : 2023-11-10 Sataporn Jantawee, Hyungsuk Lim, Minghao Li, Jung-Kwon Oh, Zoltan Pasztory, Heejin Cho, Suthon Srivaro
In this work, a new type of structural sandwich panels made with laminated oil palm wood core and rubberwood-based oriented strand board (OSB)/plywood faces were introduced for energy-efficient wall applications in Thailand. Effect of the manufacturing process and material parameters including adhesive content (250 g/m2 and 500 g/m2), core configuration (cross or parallel laminated oil palm lumber)
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Biological durability and wood–water interactions of sorbitol and citric acid (SorCA) modified wood J. Wood Sci. (IF 2.9) Pub Date : 2023-10-17 Katarzyna Kurkowiak, Lukas Emmerich, Holger Militz
This study aimed to investigate the relationship between moisture dynamics of sorbitol and citric acid (SorCA) modified wood and its biological durability. Specifically, the research aimed to determine the chemical loading needed for effective protection against wood-destroying basidiomycetes, while also improving the understanding of the moisture behavior of SorCA-modified wood. The SorCA modification
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Out-of-plane shear strength of cross-laminated timber made of Japanese Larch (Larix kaempferi) with various layups and spans J. Wood Sci. (IF 2.9) Pub Date : 2023-09-19 Yasuhiro Kawaai, Ryuya Takanashi, Wataru Ishihara, Yoshinori Ohashi, Kei Sawata, Takanobu Sasaki
Cross-laminated timber (CLT) is a promising construction material. When CLT is used for horizontal applications, shear stress occurs in the out-of-plane direction and can fracture the transverse layers owing to the rolling shear. The out-of-plane shear strength of the CLT can be evaluated by an out-of-plane loading test and is affected by the CLT layups and/or span conditions. In this study, we conducted
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Moisture content estimation of green softwood logs of three species based on measurements of flexural vibration J. Wood Sci. (IF 2.9) Pub Date : 2023-09-14 Toshiyuki Fukui, Yoshiyuki Yanase, Yoshihisa Fujii
The moisture contents of sugi (Cryptomeria japonica), todomatsu (Abies sachalinensis) and hinoki (Chamaecyparis obtusa) logs were estimated using a method of moisture content estimation proposed in our previous study. In the course of estimation, it was revealed that the regression line of the correlation between specific dynamic Young’s modulus (E/ρ) and tangent loss (tan δ) of green wood was different
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An experimental and numerical study on the coupling effect of CLT wall-to-floor angle bracket connections J. Wood Sci. (IF 2.9) Pub Date : 2023-09-11 Xiaofeng Sun, Minjuan He, Zheng Li
Cross-laminated timber (CLT) wall panels are commonly connected to the floor or foundation using metal connections, which play a critical role in determining the seismic performance and energy dissipation of the CLT shear walls. In this study, to comprehend the tension–shear coupling effect of the CLT wall-to-floor angle bracket connections under seismic loads, both monotonic and cyclic shear tests
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Thermal softening properties of various wood species within an annual ring J. Wood Sci. (IF 2.9) Pub Date : 2023-09-09 Hiroaki Horiyama, Yuka Miyoshi, Keisuke Kojiro, Yuzo Furuta
Dynamic mechanical analysis (DMA) measurements of water-saturated earlywood (EW) and latewood (LW) of various wood species in the temperature range from 0 to 100 °C were focused to clarify the differences in thermal softening properties within an annual ring. The following results were obtained. The peak of tanδ caused by micro-Brownian motion of lignin was observed in both EW and LW all species. For
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Bending responses of self-shaping wood bilayers: comparison between adsorption and desorption processes J. Wood Sci. (IF 2.9) Pub Date : 2023-09-07 Hui Peng, Zhiting Liu, Jianyi Zhu, Jiali Jiang, Jianxiong Lyu, Tianyi Zhan
Inspired by biological materials, the self-shaping wood composites induced by relative humidity (RH) have been investigated over the last decade. In this study, a wood bilayer was fabricated by assembling two layers with perpendicular fiber orientation in a series of thickness ratios and initial moisture contents (iMC). The self-shaping response of the wood bilayer was explored as a function of its
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Improving the lightfastness and thermal stability of black urushi (oriental lacquer) by kraft lignin oleate J. Wood Sci. (IF 2.9) Pub Date : 2023-08-30 Takao Tsuchiya, Chieko Narita, Kazushi Yamada, Adrian Moreno, Mika H. Sipponen, Hitomi Tsuda, Yoko Okahisa
Urushi, an oriental lacquer, is sensitive to light and easily deteriorates upon light exposure, leading to the fading and loss of gloss of its coatings. In this study, we attempted to improve the lightfastness of black urushi by utilizing the UV-absorbing properties of kraft lignin. Oleic acid-esterified kraft lignin was prepared and added to the black urushi to improve the compatibility. No aggregation
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The “chi-chi” of Ginkgo biloba L. grows downward with horizontally curving tracheids having compression-wood-like features J. Wood Sci. (IF 2.9) Pub Date : 2023-08-30 Seiichi Higuchi, Dan Aoki, Yasuyuki Matsushita, Masato Yoshida, Sachie Yagami, Kazuhiko Fukushima
The old Ginkgo biloba L. trees often develop cylindrical woody structures that grow downward from the underside of the large branches near the trunks. This structure is traditionally called “chi-chi” (a breast) in Japan. The structure of chi-chi has not been investigated in detail because of the rarity of such old trees of G. biloba. This study examined the chi-chi from wood anatomy and chemistry viewpoints
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High pressure facilitates delignification of Japanese cedar in supercritical methanol J. Wood Sci. (IF 2.9) Pub Date : 2023-08-13 Yao Yilin, Eiji Minami, Haruo Kawamoto
Supercritical methanol is a tool for decomposing woody biomass and dissolving the products under relatively mild conditions. Thus, the use of supercritical methanol—in combination with catalytic hydrogenolysis—in industrial production of biochemicals has been widely studied. However, the contribution of specific methanol properties to wood decomposition remains unclear. In this study, the effect of
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Effect of thermal modification on the stress relaxation behavior and microstructure of the cell wall J. Wood Sci. (IF 2.9) Pub Date : 2023-08-10 Koji Murata, Mayumi Utsumi, Tomoya Hirata, Masashi Nakamura
The stress relaxation behavior and cell wall microstructure of sugi were evaluated after thermal modification. Stress relaxation is observed and has a broad relaxation spectrum, implying various relaxation mechanisms. The relaxation was analyzed using a stretched exponential function, namely, the Kohlrausch–Williams–Watts (KWW) function, which contains two parameters. Moreover, the structure of the
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Heterologous production and secretion of active-form plant peroxidase in Brevibacillus choshinensis and their monolignol polymerization abilities analysis J. Wood Sci. (IF 2.9) Pub Date : 2023-07-14 Hinako Ishikura, Yuka Konishi, Jun Miura, Moeka Dohi, Shinya Kawai
Plant peroxidases are important for several processes, such as defense against pathogens, and auxin metabolism. In this study, we report the active production and secretion of plant peroxidase and mutated enzymes in the bacterium Brevibacillus choshinensis for the first time in the world. We introduced mutations into prxA3a, an anionic peroxidase gene of hybrid aspen, Populus × kitakamiensis, to substitute
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Characterization of plywood made from heat-treated rubberwood veneers bonded with melamine urea formaldehyde resin J. Wood Sci. (IF 2.9) Pub Date : 2023-06-26 Aujchariya Chotikhun, Jitralada Kittijaruwattana, Seng Hua Lee, Emilia-Adela Salca, Wa Ode Muliastuty Arsyad, Yusuf Sudo Hadi, Trairat Neimsuwan, Salim Hiziroglu
The objective of the study is to evaluate the properties of the plywood made from rubberwood veneers thermally treated at various temperatures. Rotary-peeled rubberwood veneers were thermally treated at 160, 170, 180, and 190 °C under 1 bar pressure. 5-ply plywood panels were produced using melamine urea formaldehyde (MUF) resin as binder. Dimensional stability, i.e., water absorption (WA) and thickness
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Potential of machine learning approaches for predicting mechanical properties of spruce wood in the transverse direction J. Wood Sci. (IF 2.9) Pub Date : 2023-06-25 Shuoye Chen, Rei Shiina, Kazushi Nakai, Tatsuya Awano, Arata Yoshinaga, Junji Sugiyama
To predict the mechanical properties of wood in the transverse direction, this study used machine learning to extract the anatomical features of wood from cross-sectional stereograms. Specimens with different orientations of the ray parenchyma cell were prepared, and their modulus of elasticity (MOE) and modulus of rupture (MOR) were measured by a three-point bending test. The orientation of the ray
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Geographical origin classification of Phoebe zhennan and Phoebe bournei by solid phase micro-extraction and gas chromatography-mass spectrometry J. Wood Sci. (IF 2.9) Pub Date : 2023-06-20 Zhenan Chen, Xiaoming Xue, Ruoyi Cheng, Haoqi Wu, Handng Gao, Zexun Gao
Phoebe zhennan and Phoebe bournei are favored for their fine-grain, insect resistance, special fragrance, not easily cracked and deformed, which had been widely used in furniture and construction. Wood authenticity regarding different varieties and geographical origins is increasingly becoming a concern for consumers. Due to the difference in wood quality characteristics and economic value of genus
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Influence of hemicellulose and lignin on intermolecular interaction between quinacridone and lignocellulosic fibers revealed by gel-state NMR and color measurements J. Wood Sci. (IF 2.9) Pub Date : 2023-05-18 Yasuko Saito, Keita Sakakibara, Yuki Tanaka, Naoya Hontama, Takashi Endo
Quinacridone, a π-conjugated planar molecule, and common red pigment in industrial and painting applications, easily aggregates to form large clusters of pigment particles, resulting in a reduction in color strength. Cotton-derived cellulose nanofiber (NF), which almost consists of cellulose without hemicellulose and lignin, has been found to adsorb quinacridone on the surface, which inhibits pigment
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Modelling charring of timber exposed to natural fire J. Wood Sci. (IF 2.9) Pub Date : 2023-04-17 Robert Pečenko, Tomaž Hozjan, Sabina Huč
Charring of timber structural elements in fire is one of the most fundamental phenomena that affect the fire resistance of these elements. For an accurate and safe design of structural fire resistance, it is important to consider charring of timber in natural fire exposures, since determining charring for standard fire exposure, which is a common practice, is outdated and in some cases unsafe, due
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Investigation of mechanical properties and elucidation of factors affecting wood-based structural panels under embedment stress with a circular dowel i: analysis of the influence of various conditions on the embedment properties J. Wood Sci. (IF 2.9) Pub Date : 2023-04-10 Ryutaro Sudo, Kenji Aoki, Masahiro Inayama
Embedment properties are vital to timber structural designs, and many types of wood-based structural panels have been developed for diverse uses. Comprehensive and systematic studies regarding the embedment properties of wood-based structural panels are limited. In this study, a jig that allows the observation of fracture processes is developed, and a monotonic tensile embedment test is conducted on
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Study on preparation of high-performance binderless board from Broussonetia papyrifera J. Wood Sci. (IF 2.9) Pub Date : 2023-03-30 Muyang Chen, Siqi Zheng, Jiabiao Wu, Jianying Xu
Binderless particleboards were prepared without any resin adhesives from Broussonetia papyrifera trunk by hot pressing. The effects of particle size, pressing time, pressing temperature and board density on the physical and mechanical properties of binderless boards were investigated. The effects of chemical changes in Broussonetia papyrifera binderless particleboards on the board properties were investigated
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Unique characteristics of residual stress distribution of large-diameter keyaki (Zelkova serrata) logs and examination of their measurement method J. Wood Sci. (IF 2.9) Pub Date : 2023-03-30 Naohisa Kameyama, Miyuki Matsuo-Ueda, Shuoye Chen, Zhuoting Jiang, Tatsuya Ichiyanagi, Masato Yoshida, Hiroyuki Yamamoto
Large-diameter keyaki (Zelkova serrata Makino) logs have long been used in Japan as high-quality material especially for traditional construction and furniture. However, unlike other major wood species in Japan, keyaki has been practically considered as a wood species of high difficulty when processing. Keyaki frequently shows processing defects due to sawing, such as warping, cracking, and so forth
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Effects of volatile sesquiterpenes from Japanese cedarwood on visual processing in the human brain: an event-related potential study J. Wood Sci. (IF 2.9) Pub Date : 2023-03-30 Taisuke Nakashima, Minkai Sun, Akiyoshi Honden, Yuri Yoshimura, Toshinori Nakagawa, Hiroya Ishikawa, Jun Nagano, Yuki Yamada, Tsuyoshi Okamoto, Yuichiro Watanabe, Shinji Yasunari, Koichiro Ohnuki, Noboru Fujimoto, Kuniyoshi Shimizu
Odor environments in living spaces can influence human physiological and psychological states. To elucidate the effect of volatile organic compounds (VOCs) of wood in living spaces on the modulations of cognitive processing, we built two experimental huts to simulate wooden construction living spaces. One hut was made of cedarwood (Cryptomeria japonica), and the other was made of resin. We used cedarwood
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The appropriacy of the analytical models for calculating the shear capacity of cross-laminated timber (CLT) under out-of-plane bending J. Wood Sci. (IF 2.9) Pub Date : 2023-03-16 Zirui Huang, Lingyun Jiang, Chun Ni, Zhongfan Chen
Rolling shear, an inherent property of cross-laminated timber (CLT) due to the weak shear strength of cross layers, is always the determinant of load-bearing capacity for short-span CLT members subjected to out-of-plane bending. Many analytical models were developed to calculate the shear capacity of CLT members. Because of the difficulty to precisely model the complicated shear failure mechanisms
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Bamboo slivers with high strength and toughness prepared by alkali treatment at a proper temperature J. Wood Sci. (IF 2.9) Pub Date : 2023-03-01 Jieyu Wu, Zong Yixiu, Tuhua Zhong, Wenfu Zhang, Hong Chen
Despite bamboo slivers having long been used to manufacture bamboo weaving products, the flexibility is still well below satisfactory, especially for those split from inner layer of bamboo culm. Here, a facile approach was reported to obtain strong and flexible bamboo slivers, in which the slivers from the outer and inner layer of bamboo culm were processed with 5 wt% alkali treatment at various temperatures
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The Populus alba cationic cell-wall-bound peroxidase (CWPO-C) regulates plant growth, lignin content and composition in poplar J. Wood Sci. (IF 2.9) Pub Date : 2023-02-28 Diego Alonso Yoshikay-Benitez, Kaori Ohira, Kasturi Banerjee, Koki Fujita, Jun Shigeto, Yuji Tsutsumi
Cationic cell-wall-bound peroxidase (CWPO-C) from Populus alba is the only Class III peroxidase that has been shown to be able to oxidize high molecular weight lignin polymers from sinapyl alcohol and previously, has been believed to be a lignin polymerization-specific peroxidase. However, using an Arabidopsis heterologous expression system, we showed recently that CWPO-C contributes to differentiation
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Intra-ring radial cracks in Sakhalin spruce (Picea glehnii) from artificial forest J. Wood Sci. (IF 2.9) Pub Date : 2023-02-28 Satoru Murakami, Hisashi Ohsaki, Mayumi Sato, Yuzou Sano
The occurrence of radial cracks in Sakhalin spruce (Picea glehnii), differences in the degree of cracking among five habitats, and the relationship between cracks and wood density were investigated in a total of 79 logs collected from five sites in Hokkaido, Japan. The cracks were divided into two types: intra-ring radial cracks that were restricted to cracks within an annual ring and larger radial
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The effect of delignification ratio on the PMMA occupation in poplar wood cell wall by the macro and micro comparative study J. Wood Sci. (IF 2.9) Pub Date : 2023-02-22 Haiyang Zhang, Fucheng Xu, Linlin Xu, Chaowei Zheng
The polymer/wood functional products may not be true nanocomposites due to the poor permeability of non-polar monomers into the hydrophilic wood cell wall. In this paper, methyl methacrylate (MMA) chosen as the representative non-polar monomer was used to impregnate wood with different lignin removal and then polymerized in situ in delignified wood to obtain polymethyl methacrylate/delignified wood
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An application of mixed-effects model to evaluate the role of age and size on radial variation in wood specific gravity in teak (Tectona grandis) J. Wood Sci. (IF 2.9) Pub Date : 2023-02-20 Jerry Oppong Adutwum, Hiroki Sakagami, Shinya Koga, Junji Matsumura
To test whether radial variation of wood specific gravity (WSG) is controlled by tree age or tree size in teak (Tectona grandis L.f) plantation trees, opposing different-length pith-to-bark strips which represents the differential lateral growth rate was compared using mixed-effects model which considers the heterogeneity of variances and dependency in the data to gain insight into the stochastic processes
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An investigation into carbon structures in iron-loaded charcoal based on the Raman shift and line-shape of the G´-band J. Wood Sci. (IF 2.9) Pub Date : 2023-02-02 Takayuki Yamagishi, Sakae Shibutani, Shigeru Yamauchi
Charcoal samples prepared from wood impregnated with Fe3+ were characterized using Raman spectroscopy to investigate ordered structures consisting of sp2-carbon atoms. The iron-loaded charcoal samples were synthesized at relatively low temperatures (600–850 °C). Most of the Raman peak-tops of G´-bands observed in the charcoal were positioned in the narrow range of 2700–2690 cm−1; however, the G´-band
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Iron acetate solution prepared from steel wool and vinegar for ebonizing wood J. Wood Sci. (IF 2.9) Pub Date : 2023-01-30 Robert Q. Thompson
Woodworkers darken wood by reacting iron in solution with tannins in the wood to form blue–black phenolate complexes, a process called ebonizing. According to the literature, the darkness and color are controlled by the tannin concentration (higher, darker) and the counterion of iron (acetate, darker). Iron acetate is not readily available, so woodworkers prepare it in the woodshop by reacting steel
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Spatio-temporal evolution characteristics and mitigation path of carbon dioxide emission from China’s wood and bamboo processing industry J. Wood Sci. (IF 2.9) Pub Date : 2023-01-23 Wan-Li Lao, Liang Chang, Xin-Fang Duan
Quantifying carbon dioxide (CO2) emissions from China’s wood and bamboo processing industry is associated with China’s emissions reduction targets, as well as mitigating global climate change. This study employed the Intergovernmental Panel on Climate Change Tier-2 methodology to investigate spatio-temporal evolution characteristics of carbon dioxide emission from the wood and bamboo processing industry
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Experimental study on the compression behavior of long timber column strengthened with the novel hybrid fiber sheets J. Wood Sci. (IF 2.9) Pub Date : 2023-01-17 Wang, Haoyu, Chun, Qing, Zhang, Chengwen, Ma, Shiyu, Cao, Guang, Dong, Qingchong
Long timber columns are widely used in traditional timber structures worldwide; however, many of them possess bearing capacity issues and have to be strengthened. The current study aims to develop the novel Hybrid fiber reinforced polymers (HFRP) sheets suitable for long timber columns. In the first stage, six HFRP sheets were designed, and the evaluation of these sheets was carried out by the tensile
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Investigation of sound absorption capability of pine (Pinus densiflora) cone particles J. Wood Sci. (IF 2.9) Pub Date : 2023-01-13 Jang, Eun-Suk, Kang, Chun-Won
In this study, the sound absorption capability of pine (Pinus densiflora) cone particles was investigated as an alternative and eco-friendly, sound-absorbing material. The sound absorption coefficient of pine cone particles was examined after filling impedance tubes with 4, 6, 8, and 10 cm of particles. The sound absorption capability of 4 cm and 6 cm thickness was categorized as 0.5 M class, and that
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Detecting the changes of wood properties with respect to elapsed years since wood formation by the eigenvalue distribution of near infrared spectral matrices J. Wood Sci. (IF 2.9) Pub Date : 2023-01-12 Fujimoto, Takaaki
The effects of aging on wood properties are usually evaluated based on cambial age, with the assumption that the properties do not change once the wood has formed. This study examined changes in wood properties with the number of years elapsed since wood formation. Near-infrared (NIR) spectra were acquired from various positions of 20 sample trees, and changes in the spectra were examined with respect
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Effects of dietary variation on lignocellulose degradation and physiological properties of Nicobium hirtum larvae J. Wood Sci. (IF 2.9) Pub Date : 2023-01-06 Krishanti, Ni Putu Ratna Ayu, Tobimatsu, Yuki, Afifi, Osama Ahmed, Tarmadi, Didi, Himmi, Setiawan Khoirul, Umezawa, Toshiaki, Ohmura, Wakako, Yoshimura, Tsuyoshi
We investigated the feeding behavior of larvae of the wood-destroying beetle Nicobium hirtum (Coleoptera: Anobiidae), an important wood pest in Japan, to determine the effects of dietary variation on lignocellulose degradation and larval growth and survival. Cultured colonies of N. hirtum larvae were fed artificial diets containing various amounts of starch (20, 50, and 80 wt%) mixed with hardwood
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Feature importance measures from random forest regressor using near-infrared spectra for predicting carbonization characteristics of kraft lignin-derived hydrochar J. Wood Sci. (IF 2.9) Pub Date : 2023-01-05 Hwang, Sung-Wook, Chung, Hyunwoo, Lee, Taekyeong, Kim, Jungkyu, Kim, YunJin, Kim, Jong-Chan, Kwak, Hyo Won, Choi, In-Gyu, Yeo, Hwanmyeong
This study investigated the feature importance of near-infrared spectra from random forest regression models constructed to predict the carbonization characteristics of hydrochars produced by hydrothermal carbonization of kraft lignin. The model achieved high coefficients of determination of 0.989, 0.988, and 0.985 with root mean square errors of 0.254, 0.003, and 0.008 when predicting the carbon content
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Identification of the wood species in the wooden sheath of Indonesian kris by synchrotron X-ray microtomography J. Wood Sci. (IF 2.9) Pub Date : 2022-12-15 Cipta, Hairi, Nugroho, Widyanto Dwi, Tazuru, Suyako, Sugiyama, Junji
A kris is a traditional dagger that originated in Indonesia. A kris is distinguished by its asymmetrical blade, which has layers of different metals bonded on its surface. Wood is the main material used to make the kris sheath. To preserve the knowledge about wood selection of the sheath, wood identification is a crucial first step. In the present study, we identified the wood species used to make
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Control of system parameters by estimating screw withdrawal strength values of particleboards using artificial neural network-based statistical control charts J. Wood Sci. (IF 2.9) Pub Date : 2022-12-08 Kurt, Rıfat
In this study, with data obtained from a particleboard factory, screw withdrawal strength (SWS) values of particleboards were estimated using artificial neural networks (ANNs). Predictive control charts were also created. A total of seven independent variables were used for the ANN model: modulus of elasticity (MoE), surface soundness (SS), internal bond strength (IBS), density, press time, press temperature
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Lipopolysaccharide from Yoshino cedar trees (Cryptomeria japonica) induces high levels of human macrophage polarization J. Wood Sci. (IF 2.9) Pub Date : 2022-12-08 Ouji-Sageshima, Noriko, Kitabatake, Masahiro, Fushimi, Satoki, Suzuki, Satoshi, Fukui, Yuzu, Furukawa, Ryutaro, Ito, Toshihiro
Japanese cedar, Cryptomeria japonica, is an evergreen conifer native to Japan and is often used as a building material. The humidity control properties of wood are known, but there have been few detailed analyses of its effects on living organisms. Therefore, we investigated the effects of cedar water-soluble components on human macrophages, which are essential for maintaining biological homeostasis
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Influence of boundary conditions on acoustic emission propagation characteristics of Zelkova schneideriana J. Wood Sci. (IF 2.9) Pub Date : 2022-12-06 Zhao, Yue, Li, Ming, Fang, Saiyin, Zhang, Shaochun, Huang, Changlin, Deng, Tingting, Mao, Feilong, Qin, Gezhou, Zhu, Daigen
To study the propagation characteristics of acoustic emission signals in Zelkova schneideriana under different boundary conditions, three types of boundary conditions were generated by applying aluminum plates and sound-absorbing cotton on the surface of Zelkova schneideriana specimens. Firstly, the sudden and continuous acoustic emission (AE) sources were simulated by PLB (pencil–lead break) tests
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Multi-objective optimization of particle gluing operating parameters in particleboard production based on improved machine learning algorithms J. Wood Sci. (IF 2.9) Pub Date : 2022-11-28 Zhang, Beilong, Hua, Jun, Cai, Liping, Gao, Yunbo, Li, Yilin
Particle gluing operating parameters in particleboard (PB) production have an important influence on the mechanical properties of PBs. This study developed a multi-objective optimization model based on support vector regression (SVR) optimized by the non-dominated sorted genetic algorithm-II (NSGA2) to realize the multi-objective accurate prediction of PB mechanical properties (modulus of elasticity
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Revisiting the condensation reaction of lignin in alkaline pulping with quantitativity part III: predominant formation of α-β-type over α-5-type condensation product in soda cooking treatments of apocynol and creosol J. Wood Sci. (IF 2.9) Pub Date : 2022-11-28 Komatsu, Toshihiro, Yokoyama, Tomoya
Progress in the condensation of lignin is believed to interfere with delignification in alkaline pulping processes without any clear evidence, which motivated us to revisit it quantitatively. This study is the 3rd in the series which evaluates the condensation reactions of lignin in model systems of soda cooking processes using 4-(1-hydroxyethyl)-2-methoxyphenol (apocynol, Ap) and 2-methoxy-4-methylphenol
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Fuel and material utilization of a waste shiitake (Lentinula edodes) mushroom bed derived from hardwood chips II thermal conductivity of compression-dried waste mushroom beds J. Wood Sci. (IF 2.9) Pub Date : 2022-11-21 Jiang, Zhuoqiu, Sekino, Noboru
This study investigated using waste mushroom beds as insulation material and applied compression-drying to eliminate the coarse voids that are unfavorable for insulation. The relationship between air-dry density and thermal conductivity was investigated. The mean air-dry density of the uncompacted waste mushroom beds was approximately 200 kg/m3, which increased to approximately 550 kg/m3 after four
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The variability of terpenoids and flavonoids in native Lindera umbellata from the same region J. Wood Sci. (IF 2.9) Pub Date : 2022-11-21 Kusumoto, Norihisa, Morikawa, Takuya, Hashida, Koh, Matsui, Naoyuki, Ohira, Tatsuro
The leaves and twigs of Lindera spp. have long been used as a herbal medicine and toothpicks in Japan. However, little is known about individual variations in the extractives of these species, because many previous studies have not distinguished extractives between individuals. In this study, we investigated the extractives of L. umbellata at the individual level. The detailed identification of the