Wood Science and Technology最新文献_第3页

Variation of quantitative anatomical features due to carbonization and their impact on size classes for charcoal identification 炭化引起的定量解剖特征的变化及其对木炭鉴定大小类别的影响

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2025-03-14 DOI: 10.1007/s00226-025-01641-x

Valentina Theresia Zemke, Gerald Koch, Volker Haag

{"title":"Variation of quantitative anatomical features due to carbonization and their impact on size classes for charcoal identification","authors":"Valentina Theresia Zemke, Gerald Koch, Volker Haag","doi":"10.1007/s00226-025-01641-x","DOIUrl":"10.1007/s00226-025-01641-x","url":null,"abstract":"<div><p>Species identification of carbonized wood holds significance for various scientific disciplines, including botany, palaeontology, and archaeology. Identification also contributes to the preservation of endangered wood species and forests, and supports climate research. With regard to the identification of wood and wood products, all international research institutions adhere to the IAWA list of microscopic features for hardwood and softwood identification, established by the IAWA Committee in 1989.</p><p> Our comparative anatomical studies of 30 different species reveal significant dimensional losses of quantitative features during the charring process. Specifically, the findings indicate a shift in size classes, with varying percentages of loss in anatomical features from solid wood to charcoal for most of the taxa analyzed. Consequently, the size classes defined in databases for solid wood differentiation cannot be directly applied to charcoal identification. Furthermore, the present study employs statistical evaluations to illustrate the application of conventional size classes for the parameters: tangential diameter of vessel elements, intervessel pit diameter, ray height, and width. The implications of these findings for charcoal research are discussed in detail.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"59 3","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00226-025-01641-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143622228","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

Effect of attached weight on the measurement of the Young’s modulus and loss tangent of solid wood via the free and forced flexural vibration methods 附加重量对实木自由和受迫弯曲振动法测量杨氏模量和损失切线的影响

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2025-03-12 DOI: 10.1007/s00226-025-01646-6

Hiroshi Yoshihara, Masahiro Yoshinobu, Makoto Maruta

{"title":"Effect of attached weight on the measurement of the Young’s modulus and loss tangent of solid wood via the free and forced flexural vibration methods","authors":"Hiroshi Yoshihara, Masahiro Yoshinobu, Makoto Maruta","doi":"10.1007/s00226-025-01646-6","DOIUrl":"10.1007/s00226-025-01646-6","url":null,"abstract":"<div><p>The Young’s modulus and loss tangent of a Sitka spruce wood sample in the longitudinal direction were determined using free flexural vibration (FRFV) and forced flexural vibration (FOFV) tests. During the tests, the attached weight and sample length were varied, and their effects on the Young’s modulus and loss tangent of the sample were examined. The Young’s modulus could be accurately and easily obtained from both the FRFV and FOFV tests using a modified Euler-Bernoulli’s equation, with the effect of the attached weight mitigated. No significant difference was observed between the two values of the Young’s modulus obtained from the two tests. The loss tangent slightly increased as the attached weight increased when the ratio of attached weight/sample weight was below 10%; however, it significantly increased with the increase in the attached weight when the ratio of the attached weight/sample weight exceeded 10%. The values of the loss tangent obtained from the FOFV tests for different samples were often higher than the corresponding values obtained from the FRFV tests, whereas the loss tangent values of different samples obtained from the FOFV tests were lower than the corresponding values obtained from the FRFV tests.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"59 3","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00226-025-01646-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143594815","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

Flame retardancy of chemically surface-modified hardwoods by electron-beam-initiated polymerisation of impregnated acrylate monomers 浸渍丙烯酸酯单体电子束引发聚合化学表面改性硬木的阻燃性

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2025-03-12 DOI: 10.1007/s00226-025-01644-8

Solène Pellerin, Fabienne Samyn, Jérémy Winninger, Sophie Duquesne, Véronic Landry

{"title":"Flame retardancy of chemically surface-modified hardwoods by electron-beam-initiated polymerisation of impregnated acrylate monomers","authors":"Solène Pellerin, Fabienne Samyn, Jérémy Winninger, Sophie Duquesne, Véronic Landry","doi":"10.1007/s00226-025-01644-8","DOIUrl":"10.1007/s00226-025-01644-8","url":null,"abstract":"<div><p>Monomer impregnation is a great strategy to modify various wood properties. By choosing the right impregnant, it may lead to a higher flame retardancy of treated wood, contributing to its use in specific sectors such as building interior finishes. Yellow birch (<i>Betula alleghaniensis</i> Britt.) and sugar maple (<i>Acer saccharum</i> Marsh.) were surface-impregnated with an acrylate and a phosphorus acrylate monomer under vacuum and exposed to an electron beam for polymerisation. A surface chemical retention of 100 g.m<sup>− 2</sup> was obtained for sugar maple, while the impregnation of yellow birch samples reached one around 200 g.m<sup>− 2</sup>. X-ray densitometry confirmed an asymmetric density profile due to the monomer penetration concentrated in the first millimetres of the samples. Microtomography and Raman spectroscopy highlighted the penetration path of the monomers in the wood, mainly through the vessels. The lumens of the cells close to the surface were also filled with polymers. The phosphorus monomer surface impregnation positively impacted the thermal and fire properties of the modified wood. A 25% decrease in the peak of heat release rate was observed, and the residual mass was multiplied by two compared to the reference. The phosphorus monomer contributed to the char formation.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"59 3","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143594636","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

Wood pyrolysis modeling based on the pyrolysis characteristics of wood extracted and pseudo components 基于木材热解特征提取和伪组分的木材热解建模

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2025-02-25 DOI: 10.1007/s00226-025-01630-0

Ziling Shen, Jing Zhang, Chusheng Qi, Jun Mu

{"title":"Wood pyrolysis modeling based on the pyrolysis characteristics of wood extracted and pseudo components","authors":"Ziling Shen, Jing Zhang, Chusheng Qi, Jun Mu","doi":"10.1007/s00226-025-01630-0","DOIUrl":"10.1007/s00226-025-01630-0","url":null,"abstract":"<div><p>Wood pyrolysis is a complex process, and understanding its mechanism is challenging due to the interaction of multiple components. In this study, the pyrolysis kinetic properties of experimentally extracted wood components and wood pseudo components simulated via Fraser–Suzuki function deconvolution methods were analyzed. Additionally, the differences between the independent parallel reaction model (IPRM) and the deconvolution method were compared to investigate the pyrolysis characteristics of wood. The activation energy (<i>E</i>) and pre-exponential factor (<i>A</i>) were calculated using the Flynn-Wall-Ozawa (FWO) method. The results indicated that the average <i>E</i> for chemically extracted cellulose from Chinese fir was 165.4 kJ/mol and 157.1 kJ/mol for birch cellulose. The corresponding values for their pseudo-cellulose were 109.9 kJ/mol and 153.8 kJ/mol, respectively. Within the range of conversion rates less than 0.8, the pseudo components required a higher temperature to achieve the same conversion rate as the experimentally extracted components. The IPRM method accurately predicted the pyrolysis properties by combining holocellulose and lignin. However, its accuracy was low when combining cellulose, hemicellulose, and lignin, which was attributed to the interaction between in-situ components influencing wood pyrolysis.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"59 2","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481208","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

Unsupervised wood species identification based on multiobjective optimal clustering and feature fusion 基于多目标最优聚类和特征融合的无监督树种识别

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2025-02-25 DOI: 10.1007/s00226-025-01636-8

Yuan Wang, Wen-Jin Ma, Meng Yang, Ren-He Qu, Stavros Avramidis

{"title":"Unsupervised wood species identification based on multiobjective optimal clustering and feature fusion","authors":"Yuan Wang, Wen-Jin Ma, Meng Yang, Ren-He Qu, Stavros Avramidis","doi":"10.1007/s00226-025-01636-8","DOIUrl":"10.1007/s00226-025-01636-8","url":null,"abstract":"<div><p>This paper proposes an unsupervised wood species identification approach utilizing multiobjective optimization clustering and feature fusion. To address the inherent limitations of single-band spectra in capturing comprehensively wood characteristics, this approach integrates preprocessed low-dimensional terahertz (THz) and hyperspectral data. Additionally, to address the challenge of selecting the optimal k-value in clustering, an unsupervised wood clustering algorithm was developed, employing multiobjective optimization and evolutionary algorithms. This proposed algorithm incorporated a prototype coding method for initialization, density peak clustering for pattern identification, and an improved firefly optimization algorithm to introduce cross-variation and maintain population diversity. To further refine the clustering process, a selection operator based on grid division and fast non-dominated sorting was designed, optimizing the clustering performance. The model was evaluated on a dataset containing hyperspectral and THz spectra from 400 samples, representing ten wood species—five coniferous and five broadleaf species. Experimental results indicated that fusing the spectral data resulted in a 3.5% increase in clustering purity compared to individual datasets. Moreover, the proposed algorithm outperformed established clustering methods such as DBSCAN, OPTICS, and density peak clustering, achieving a maximum clustering purity of 91.25% across both internal and external clustering metrics. These findings demonstrate the effectiveness of the multi-spectral fusion approach and the proposed algorithm in enhancing wood species identification accuracy, offering a promising avenue for improving non-destructive evaluation methods in forestry and material sciences.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"59 2","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481137","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

Variation in anatomical characteristics and chemical compositions during the sapwood to heartwood transformation of cultivated teak and their relationships to color formation 人工柚木边材向心材转化过程中解剖特征和化学成分的变化及其与颜色形成的关系

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2025-02-25 DOI: 10.1007/s00226-025-01642-w

Qiming Feng, Lirong Yan, Guihua Huang, Suhong Ren, Jörn Appelt, Silke Radtke, Gerald Koch, Jinzhen Cao, Rongjun Zhao

{"title":"Variation in anatomical characteristics and chemical compositions during the sapwood to heartwood transformation of cultivated teak and their relationships to color formation","authors":"Qiming Feng, Lirong Yan, Guihua Huang, Suhong Ren, Jörn Appelt, Silke Radtke, Gerald Koch, Jinzhen Cao, Rongjun Zhao","doi":"10.1007/s00226-025-01642-w","DOIUrl":"10.1007/s00226-025-01642-w","url":null,"abstract":"<div><p>The interplay between the anatomical structure, chemical compositions, and color of teak wood is not yet fully understood. An analysis of the anatomical structure and chemical compositions from sapwood to heartwood of cultivated teak (<i>Tectona grandis</i> L.f.) was conducted to elucidate the radial variation in wood color. Extractives were generated within the ray parenchyma cells located in the transition (T) zone, and subsequently infiltrated vessel lumina through the pits in the heartwood, accompanied by the disintegration of the nucleus and the disappearance of starch grains. As heartwood developed, the conjugated carbonyl groups in lignin increased, while the S/G ratio experienced a marked rise within the inner heartwood. The extractive content reached a maximum value in the outer heartwood. Signal intensities for squalene and 2-methyl-9,10-anthracenedione in heartwood were approximately 2.8 and 1.4 times greater than those found in sapwood, respectively. Lapachol only appeared in heartwood. A decrease in the <i>L</i><sup><i>*</i></sup> value of heartwood was noted in contrast to sapwood, and the color shifted towards red and yellow from sapwood to heartwood. The color difference quantified between sapwood and heartwood was 12.90. The anatomical structure provides the formation and storage spaces, and transportation channels for the extractives. The changes in lignin structure and extractive components are directly linked to the development of wood coloration. Overall, the study contributes to a deep understanding of the relationships between the microstructure, chemical compositions and color formation of teak wood, and will provide insights for the high-value utilization of cultivated precious wood.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"59 2","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481244","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

Swelling and shrinking behaviour of bamboo and its application on a hygro-mechanical model 竹的胀缩特性及其在水力学模型上的应用

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2025-02-21 DOI: 10.1007/s00226-025-01631-z

Leo Maia do Amaral, Luisa Molari, Holmer Savastano Jr.

{"title":"Swelling and shrinking behaviour of bamboo and its application on a hygro-mechanical model","authors":"Leo Maia do Amaral, Luisa Molari, Holmer Savastano Jr.","doi":"10.1007/s00226-025-01631-z","DOIUrl":"10.1007/s00226-025-01631-z","url":null,"abstract":"<div><p>Bamboo exposed to variations in humidity is prone to cracking, which can reduce its usability. As a natural material, bamboo’s hygroscopicity causes dimensional changes, influenced by the gradient distribution of fibres throughout the wall thickness. This study evaluated the dimensional changes resulting from variations in moisture content. Hygroscopic coefficients were extracted and applied in a finite element model to assess the circumferential stresses generated during sorption and desorption processes. Conditioning tests showed that open ring samples tend to close during sorption and open during desorption, due to the predominant swelling and shrinking behaviour of the fibre cells. The developed finite element model successfully replicated the aperture behaviour and dimensional changes in the thickness of open ring bamboo samples. The optimized parameters were subsequently used to predict the stresses under varying humidity conditions in closed-ring samples The circumferential stresses ranged from 9.8 MPa to -12.5 MPa from the inner to the outer layer in the saturated condition, and from − 7.1 MPa to 11.4 MPa in the dried condition. The values achieved reflect stresses that can lead to cracks and the failure of bamboo, thereby demonstrating the model’s ability to predict the hygroscopic behaviour of the material.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"59 2","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143466022","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

A multiple spectral important feature fusion method for wood species identification 树种识别的多光谱重要特征融合方法

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2025-02-19 DOI: 10.1007/s00226-025-01639-5

Yihao He, Yuan Wang, Wenjin Ma

{"title":"A multiple spectral important feature fusion method for wood species identification","authors":"Yihao He, Yuan Wang, Wenjin Ma","doi":"10.1007/s00226-025-01639-5","DOIUrl":"10.1007/s00226-025-01639-5","url":null,"abstract":"<div><p>This study proposes a novel method for wood species identification, that employs importance-based feature selection integrated with a multiple spectral fusion technique. Specifically, the fusion integrates near-infrared spectroscopy (NIR), hyperspectral imaging spectral information, and terahertz (THz) spectroscopy. The experimental samples comprised four conifers and one broadleaf wood. Preprocessing of the spectral data was conducted using a combination of Savitzky-Golay smoothing (SG), Standard Normal Variate (SNV) correction, and normalization techniques. A hybrid feature selection method, combining random forest (RF) and gradient boosting decision tree (GBDT) algorithms, was then employed to extract the most important spectral features. To enhance clustering stability and mitigate the risk of overfitting, data augmentation was performed using a variational auto-encoder (VAE) augmented with self-attention (SA) mechanisms. Subsequently, the fused multiple spectral data, containing the most significant features from both individual and combined spectra, were subjected to K-means clustering. The clustering performance was assessed using metrics such as accuracy (ACC), normalized mutual information (NMI), and adjusted rand index (ARI). The results revealed that the fusion of NIR features with the top 50 features with the highest importance of the top 60 THz features yielded the most optimal results. The clustering evaluation metrics demonstrated an ACC of 0.945, an NMI of 0.957, and an ARI of 0.959. The hybrid feature selection approach facilitates a deeper understanding of the critical features influencing the performance of wood species identification models, thereby enabling more effective feature selection during the development of machine learning models.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"59 2","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00226-025-01639-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143446371","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

Visualization of the spatial distribution of the heartwood constituents of Dalbergia odorifera 降香黄檀心材成分空间分布的可视化研究

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2025-02-19 DOI: 10.1007/s00226-025-01638-6

Xiaodie Lu, Yunlin Fu, Penglian Wei, Mengji Qiao

{"title":"Visualization of the spatial distribution of the heartwood constituents of Dalbergia odorifera","authors":"Xiaodie Lu, Yunlin Fu, Penglian Wei, Mengji Qiao","doi":"10.1007/s00226-025-01638-6","DOIUrl":"10.1007/s00226-025-01638-6","url":null,"abstract":"<div><p>The heartwood of <i>Dalbergia odorifera T. Chen (D. odorifera)</i> is esteemed for its high flavonoid content. This study aimed to explore the spatial distribution of heartwood components in the xylem, analyze their accumulation patterns, and further discuss the synthesis and migration pathways of these components. To achieve this, DESI-MSI technology was employed, leveraging the specific interaction between flavonoids and the naturally derived compound Naturstoff A (diphenylboronic acid 2-aminoethyl ester), alongside Raman microscopy techniques to elucidate the in situ distribution of heartwood extracts in the xylem. Additionally, combined with microscopic observations of the pits, the study investigated the accumulation and migration pathways of heartwood components in <i>D. odorifera</i>. The findings indicated that the total flavonoid content increased from sapwood to heartwood and subsequently decreased, with the difference in fluorescence intensity before and after extraction displaying a similar trend. The distribution pattern of various flavonoids in the xylem was as follows: heartwood > transition zone > sapwood, and this distribution was uneven among different tissues within the same region. Notably, within the same region, the flavonoid accumulation in axial parenchyma cells was greater than that in ray parenchyma cells. Moreover, the cell corners were identified as the main sites of deposition for heartwood extracts. This research underscores the distribution patterns of heartwood constituents within the xylem, providing a scientific foundation for the conservation, enhancement, and utilization of <i>D. odorifera</i> heartwood resources.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"59 2","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00226-025-01638-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143446372","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

Unlocking the potential of undervalued forest residues: a comprehensive characterization of eucalypt stump in the biorefinery context 解锁被低估的森林残留物的潜力：桉树树桩在生物炼制背景下的综合表征

IF 3.1 2区农林科学

Wood Science and Technology Pub Date : 2025-02-17 DOI: 10.1007/s00226-025-01640-y

Jorge Gominho, Anouck Habrant, Ricardo A. Costa, Brigitte Chabbert, Ana Lourenço

{"title":"Unlocking the potential of undervalued forest residues: a comprehensive characterization of eucalypt stump in the biorefinery context","authors":"Jorge Gominho, Anouck Habrant, Ricardo A. Costa, Brigitte Chabbert, Ana Lourenço","doi":"10.1007/s00226-025-01640-y","DOIUrl":"10.1007/s00226-025-01640-y","url":null,"abstract":"<div><p><i>Eucalyptus globulus</i> stumps are a by-product from the coppice pulp plantation after three generations. In this study a stump was fractionated in three discs (60 cm between them), and their constituent tissues—heartwood, sapwood and bark—were subjected to further chemical characterization by summative analysis, evaluation of the phytochemical profile and antioxidants activities, plus GC/MS and analytical pyrolysis aiming at their valorization. Wood density was similar between tissues and disc level: values ranging from 0.652 to 0.705 g/cm<sup>3</sup> (Disc 1) and 0.605 g/cm<sup>3</sup> (Disc 5). Bark had high ash (3.5%), extractives (7.5%) and holocellulose (68.4%) but lower lignin contents (22.0%). Original heartwood contained 0.7% ash, 7.0% extractives, 27.1% lignin, and 67.3% holocellulose. Heartwood showed high extractives (12.1–15.8%), less lignin (23.9–24.5%), and high holocellulose (61.7–64.7%) compared to sapwood which contained 3.9–5.4% extractives, 26.9–27.3% lignin and 68.6–71.5% holocellulose. Water extracts had poor antioxidant activity in contrast to ethanol extracts with high activities in heartwood. All tissues presented GS lignin type with S/G ratios varying from 3.0 to 3.4 (heartwood), 3.2–3.4 (sapwood), bark (3.5) and 3.8 (original heartwood). In wood, fibers and vessels were highly lignified with SG and G-lignin respectively; while rays had low lignin with G-type. Light and fluorescence macroscopic observation of the tissues in Disc 1 revealed a lower proportion and larger vessels in sapwood and high emission fluorescence at 488nm. Overall, these results show that stumps are valuable raw material to be used under the biorefinery context.</p></div>","PeriodicalId":810,"journal":{"name":"Wood Science and Technology","volume":"59 2","pages":""},"PeriodicalIF":3.1,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00226-025-01640-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423207","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