Wood Science and Technology最新文献_第8页

Swelling of oak wood in alcoholic solutions: synergy and memory effects between water and ethanol 酒精溶液中橡木的膨胀：水和乙醇的协同效应和记忆效应

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2024-05-15 DOI: 10.1007/s00226-024-01556-z

Cédric Dussaut, Julien Colin, Joel Casalinho, Rémi Teissier Du Cros, François Litoux-Desrues, Charlotte Abadie, Patrick Perré

引用次数: 0

Toward the modelling of laminated veneer lumber stiffness and the influence of the number of plies 层压单板木材刚度建模及层数的影响

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2024-05-15 DOI: 10.1007/s00226-024-01558-x

A. Peignon, J. Serra, A. Cantarel, F. Eyma, B. Castanié

引用次数: 0

Theoretical study on the reaction mechanism of Dakin oxidation: influence of methoxy groups 达金氧化反应机理的理论研究：甲氧基的影响

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2024-05-10 DOI: 10.1007/s00226-024-01555-0

Shuqi Dong, Zhehui Zhang, Hui Zhang, Xia Du, Zhuohua Sun, Yan Shang, Tingyu Yao

{"title":"Theoretical study on the reaction mechanism of Dakin oxidation: influence of methoxy groups","authors":"Shuqi Dong, Zhehui Zhang, Hui Zhang, Xia Du, Zhuohua Sun, Yan Shang, Tingyu Yao","doi":"10.1007/s00226-024-01555-0","DOIUrl":"10.1007/s00226-024-01555-0","url":null,"abstract":"<div><p>The reaction mechanism of the Dakin reaction for three lignin model compounds was thoroughly investigated using density functional theory (DFT). A more comprehensive atomic and molecular level oxidation mechanism for the Dakin reaction was proposed, complementing the previously reported reaction process. The potential energy surface information for twelve possible channels was obtained at B3LYP/6–311 + G(<i>d,p</i>) level based on the geometry optimization together with the frequency calculation of the stationary points. The influence of substituent effects on the reaction energy barrier of Dakin reaction in lignin model compounds was estimated. The calculated results revealed that the rearrangement reaction of quinone structure primarily involves ring-forming and ring-opening of epoxy group, the ring-forming on O and C of benzene ring and ring-opening on C and C of benzene ring. The energy barriers of Dakin reaction decrease with an increase in the number of methoxy groups in lignin model compounds. Further elucidation of the Dakin reaction mechanism will provide a theoretical foundation for the development of more effective catalytic systems to enhance the valuable utilization of lignin in future applications.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"58 3","pages":"1141 - 1152"},"PeriodicalIF":3.1,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140932154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The relationship between branch scar attributes and knot features in birch (Betula pendula and B. pubescens) 桦树（Betula pendula 和 B. pubescens）枝痕属性与树结特征之间的关系

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2024-05-09 DOI: 10.1007/s00226-024-01554-1

Christian Kuehne, Katrin Zimmer, Aaron Smith

{"title":"The relationship between branch scar attributes and knot features in birch (Betula pendula and B. pubescens)","authors":"Christian Kuehne, Katrin Zimmer, Aaron Smith","doi":"10.1007/s00226-024-01554-1","DOIUrl":"10.1007/s00226-024-01554-1","url":null,"abstract":"<div><p>There is currently no quality sorting of harvested hardwood timber in Norway on a national scale. Medium- and high-quality logs including those from birch (<i>Betula pubescens</i> Ehrh., <i>B. pendula</i> Roth) are thus not utilized according to their potential monetary value. Increased domestic utilization of quality birch timber requires that the quality of harvested logs be properly assessed for potential end uses. A preferred sorting procedure would use visually detectable external log defects to grade roundwood timber. Knots are an important feature of inner log quality. Thus, the aim of this study was to evaluate whether correlations between branch scar size and knot features could be found in Norwegian birch. Using 168 knots from seven unpruned birch trees, external bark attributes often showed strong correlations with internal wood quality. Both length of the mustache and length of the seal performed well as predictors of stem radius at the time of knot occlusion. The presence of a broken off branch stub as part of an occluded knot significantly increased the knot-effected stem radius, proving that the practice of removing branches and branch stubs along the lower trunk is a crucial measure if quality timber production is the primary management goal.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"58 3","pages":"907 - 921"},"PeriodicalIF":3.1,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00226-024-01554-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140932017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Protein content and antioxidant enzymes activity in reaction wood of poplar and their response to different levels of sustained bending stress 杨树反应木中的蛋白质含量和抗氧化酶活性及其对不同程度持续弯曲应力的响应

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2024-05-07 DOI: 10.1007/s00226-024-01553-2

Abasali Masoumi, Jason Grabosky, Frank W. Telewski

{"title":"Protein content and antioxidant enzymes activity in reaction wood of poplar and their response to different levels of sustained bending stress","authors":"Abasali Masoumi, Jason Grabosky, Frank W. Telewski","doi":"10.1007/s00226-024-01553-2","DOIUrl":"10.1007/s00226-024-01553-2","url":null,"abstract":"<div><p>The histogenesis of reaction wood in woody plants is a promising area of exploration for emerging wood technology products and for a generalized understanding of stress physiology. The activity of total protein and antioxidant enzymes were measured during the development of normal and reaction wood (opposite wood and tension wood) in the bole of poplar trees (<i>Populous alba</i> L.) induced by two levels of sustained bending stress to produce moderate and severe reaction wood. Four-year-old poplars were induced to produce reaction wood by sustained bending to 0, 35 and 80° from the vertical position. The activity of antioxidant enzymes was studied with repeated sampling during one growing season. Severe reaction wood showed higher levels of H<sub>2</sub>O<sub>2</sub> and enzymes than moderate reaction wood. Tension wood showed a higher accumulation of total protein than opposite wood at the beginning and end of the bending treatment and opposite wood showed higher enzymatic activity. H<sub>2</sub>O<sub>2</sub> and antioxidant enzymes were also sensitive to mechanical bending stress; compared to normal wood, tension wood and opposite wood which showed higher enzymatic activity coupled with higher amounts of total H<sub>2</sub>O<sub>2</sub>. Ascorbate peroxidase was more active than glutathione peroxidase in both tension and opposite wood at some periods of sampling.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"58 3","pages":"1077 - 1093"},"PeriodicalIF":3.1,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140881375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multilevel analysis of six species of Phyllostachys bamboo and Arundo donax: preliminary survey on Italian grown stands 六种竹子和 Arundo donax 的多层次分析：对意大利种植林的初步调查

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2024-04-24 DOI: 10.1007/s00226-024-01547-0

Silvia Greco, Luisa Molari, Giovanni Valdrè, Jose Jaime Garcia

{"title":"Multilevel analysis of six species of Phyllostachys bamboo and Arundo donax: preliminary survey on Italian grown stands","authors":"Silvia Greco, Luisa Molari, Giovanni Valdrè, Jose Jaime Garcia","doi":"10.1007/s00226-024-01547-0","DOIUrl":"10.1007/s00226-024-01547-0","url":null,"abstract":"<div><p>The paper focuses on a multilevel analysis considering six species of bamboo of the <i>Phyllostachys</i> family (<i>P. bambusoides</i>, <i>edulis</i>, <i>iridescens</i>, <i>viridiglaucescens</i>, <i>violacescens</i>, and <i>vivax</i>) and <i>Arundo donax</i> grown in temperate climates, most of them not already studied in the literature. The analysis is divided into three levels. The analysis at the first level (the microscopic scale) includes an anatomical study to assess the shapes and dimensions of the vascular bundles and the sclerenchymatic and parenchymatic tissues. At the second mesoscale level, the percentage and distribution of the fibres, voids and parenchyma are calculated. At the third level, the macroscopic one, a discussion of the influence of the microscopical properties on mechanical properties is carried out. Despite the limited number of specimens analysed at the microscale level, differences between species emerged from the analysis and influenced the macroscopic characteristic values. In particular, the morphology of the components differs, especially in the case of <i>Arundo donax</i>, which presents a unique distribution of its components along the culm wall. Different contents of each component are observed for the species analysed. Moreover, an innovative analysis that focuses on the presence and distribution of voids is presented, which have a fundamental role in the mechanical behaviour of this material. The analysis did not account for the influence of the environment on composition or anatomical and physical characteristics.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"58 3","pages":"1025 - 1049"},"PeriodicalIF":3.1,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00226-024-01547-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140662009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Plant cell wall reconstruction towards enhancing moisture stability and toughness by assembling delignified wood with alkali lignin 通过用碱木质素组装脱木质素木材，重建植物细胞壁以提高水分稳定性和韧性

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2024-04-21 DOI: 10.1007/s00226-024-01552-3

Feng Gu, Xiuxue Niu, Daquan Zhang, Zhaosheng Cai, Wangxia Wang, Junlong Song, Yongcan Jin, Huining Xiao

{"title":"Plant cell wall reconstruction towards enhancing moisture stability and toughness by assembling delignified wood with alkali lignin","authors":"Feng Gu, Xiuxue Niu, Daquan Zhang, Zhaosheng Cai, Wangxia Wang, Junlong Song, Yongcan Jin, Huining Xiao","doi":"10.1007/s00226-024-01552-3","DOIUrl":"10.1007/s00226-024-01552-3","url":null,"abstract":"<div><p>Developing a moisture-stable structural material with high toughness is essential for improving the stability of packaging and building materials. Wood is a pervasive structural material with naturally good mechanical properties. However, insufficient moisture stability and toughness compromises its safety and structural requirements. Herein, we constructed a moisture-stable wood veneer with high toughness by assembling the choline chloride-ethanolamine delignified wood with alkali lignin, followed by hot-pressing to densify the material. Lignin can be assembled into the microchannel of the delignified wood as a filler and binder for reducing molecular transportation and increasing internal bonding. The enhanced tensile strength (582.0 MPa) and strain (3.6%) are accompanied by a significant increase in the toughness to 11.1 MJ/m<sup>3</sup>, which is 37 times higher than that of natural wood. The excellent mechanical property can be preserved to a large extent after retaining in tropic moisture conditions (38 °C, 90% RH) with retention of 66.2% and 60.8% for tensile strength and toughness, respectively. A stable water contact angle on the surface and limited water adsorption of reconstructed wood indicate a lowered water infiltration velocity, suggesting highly improved moisture stability as needed for structural materials.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"58 3","pages":"923 - 939"},"PeriodicalIF":3.1,"publicationDate":"2024-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140678576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterisation of hygroelastic properties of compression and opposite wood found in branches of Norway spruce 挪威云杉树枝中压缩木和对生木的湿弹性特性分析

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2024-04-16 DOI: 10.1007/s00226-024-01548-z

Marie Hartwig-Nair, Sara Florisson, Malin Wohlert, E. Kristofer Gamstedt

{"title":"Characterisation of hygroelastic properties of compression and opposite wood found in branches of Norway spruce","authors":"Marie Hartwig-Nair, Sara Florisson, Malin Wohlert, E. Kristofer Gamstedt","doi":"10.1007/s00226-024-01548-z","DOIUrl":"10.1007/s00226-024-01548-z","url":null,"abstract":"<div><p>The differential swelling seen between softwood opposite wood (OW) and its neighbouring compression wood (CW) developed in branches prompts several engineering issues such as dimensional instability and cracking. For a more efficient use of resources, the inevitable CW and OW should not be discarded or used as fuel, but incorporated into engineered wood products. Swelling is a hygroelastic phenomenon, where both the swelling and elastic properties of CW and OW are needed in order to make proper structural predictions. In this paper, swelling coefficients and moisture dependent elastic moduli for both CW and OW in the three principal material directions are provided along with measurements of moisture content, density, and microfibril angle. The small deformations necessitate the use of precise X-ray micro-computed tomography for measurements. The results indicate that CW and OW from Norway spruce branches differ in swelling, especially in longitudinal direction at low moisture content. It is noted that CW is a wood type with less pronounced anisotropic behaviour than both OW and normal wood from the stem, with the elastic moduli less sensitive to moisture changes in both longitudinal and transverse directions.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"58 3","pages":"887 - 906"},"PeriodicalIF":3.1,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00226-024-01548-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140616177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Aqueous modification of waterlogged archaeological wood by phenylboronic acid to reduce hygroscopicity and improve the dimensional stability 用苯基硼酸对水渍考古木材进行水性改性，以降低吸湿性并提高尺寸稳定性

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2024-04-11 DOI: 10.1007/s00226-024-01551-4

Yihang Zhou, Yue Zhang, Liyan Kan, Yue Wang, Kai Wang, Dongbo Hu

{"title":"Aqueous modification of waterlogged archaeological wood by phenylboronic acid to reduce hygroscopicity and improve the dimensional stability","authors":"Yihang Zhou, Yue Zhang, Liyan Kan, Yue Wang, Kai Wang, Dongbo Hu","doi":"10.1007/s00226-024-01551-4","DOIUrl":"10.1007/s00226-024-01551-4","url":null,"abstract":"<div><p>During the dehydration of waterlogged archaeological wood (WAW), shrinkage inevitably occurs due to capillary force and hydrogen bond recombination as WAW loses free and adsorbed water. Existing drying techniques, including solvent displacement, freeze-drying, and supercritical fluid drying, only take effect by reducing or eliminating the surface tension of liquid. Nonetheless, the contribution of hydrogen bond recombination in shrinkage has long been neglected and a countermeasure concerning this problem is needed. In this study, we propose a simple aqueous phenylboronic acid (PBA) treatment that can help improve dimensional stability and reduce hygroscopicity of WAW. Analysis by Fourier transform infrared spectroscopy, density functional theory calculation and dynamic vapour sorption reveal that PBA can incorporate with hydroxyl groups (–OH) on cellulose through coordination and hydrogen bonds, occupy the water-cellulose binding sites, and possibly inhibit the formation of hydrogen bonds between adjacent cellulose chains.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"58 3","pages":"941 - 957"},"PeriodicalIF":3.1,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140586850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transient hygro- and hydro-expansion of freely and restrained dried paper: the fiber-network coupling 自由和受约束干燥纸张的瞬态湿膨胀和水膨胀：纤维-网络耦合

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2024-04-09 DOI: 10.1007/s00226-024-01540-7

Niels H. Vonk, Eline P. C. van Spreuwel, Thomas Anijs, Ron H. J. Peerlings, Marc G. D. Geers, Johan P. M. Hoefnagels

{"title":"Transient hygro- and hydro-expansion of freely and restrained dried paper: the fiber-network coupling","authors":"Niels H. Vonk, Eline P. C. van Spreuwel, Thomas Anijs, Ron H. J. Peerlings, Marc G. D. Geers, Johan P. M. Hoefnagels","doi":"10.1007/s00226-024-01540-7","DOIUrl":"10.1007/s00226-024-01540-7","url":null,"abstract":"<div><p>The transient dimensional changes during <i>hygro</i>-expansion and <i>hydro</i>-expansion of freely and restrained dried, softwood and hardwood sheets and fibers is monitored, to unravel the governing micro-mechanisms occurring during gradual water saturation. The response of individual fibers is measured using a full-field global digital height correlation method, which has been extended to monitor the transient <i>hydro</i>-expansion of fibers from dry to fully saturated. The <i>hygro</i>- and <i>hydro</i>-expansion is larger for freely versus restrained dried and softwood versus hardwood handsheets. The transient sheet-scale <i>hydro</i>-expansion reveals a sudden strain and moisture content step. It is postulated that the driving mechanism is the moisture-induced softening of the so-called ”dislocated regions” in the fiber’s cellulose micro-fibrils, unlocking further fiber swelling. The strain step is negligible for restrained dried handsheets, which is attributed to the ”dislocated cellulose regions” being locked in their stretched configuration during restrained drying, which is supported by the single fiber <i>hydro</i>-expansion measurements. Finally, an inter-fiber bond model is exploited and adapted to predict the sheet-scale <i>hygro</i>-expansion from the fiber level characteristics. The model correctly predicts the qualitative differences between freely versus restrained dried and softwood versus hardwood handsheets, yet, its simplified geometry does not allow for more quantitative predictions of the sheet-scale <i>hydro</i>-expansion.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"58 3","pages":"993 - 1024"},"PeriodicalIF":3.1,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00226-024-01540-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140586969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0