Jeong-Wook Seo, En-Bi Choi, Jun-Hui Park, Yo-Seob Lee, Hyun-Mi Lee, Eun-Sook Kim
The tracheid length (TL) in conifer species is a primary factor to determine quality of paper and wood products. However, TL in Pinus densiflora Siebold & Zucc., a dominant conifer species in Korea, has not been monitored systematically across the country yet. To this end, the TL of early- and latewoods of Korean red pine from 16 provinces of the Republic of Korea was measured and compared to verify the differences (1) between the monitoring years (2014–2018), (2) between early- and latewoods of the trees from the same provinces, and (3) between the early- and latewoods from different provinces. Analysis of 31,500 tracheids revealed that the variation of TL of early- and latewood from two and six out of 16 sites, respectively, were not statistically meaningful and the TL of latewood displayed a lower annual variation than that of the earlywood during the monitoring years. The TL of the latewood was longer than that of the earlywood; however, four out of 16 sites showed shorter TL for the latewood. So, it was verified that the relationship between the TL of the early- and latewood can change. Moreover, the TL was longer for the trees located in the southeast regions.
{"title":"Comparisons of tracheid lengths in Pinus densiflora Siebold & Zucc.: earlywood versus latewood and province versus province","authors":"Jeong-Wook Seo, En-Bi Choi, Jun-Hui Park, Yo-Seob Lee, Hyun-Mi Lee, Eun-Sook Kim","doi":"10.1515/hf-2023-0107","DOIUrl":"https://doi.org/10.1515/hf-2023-0107","url":null,"abstract":"The tracheid length (TL) in conifer species is a primary factor to determine quality of paper and wood products. However, TL in <jats:italic>Pinus densiflora</jats:italic> Siebold & Zucc., a dominant conifer species in Korea, has not been monitored systematically across the country yet. To this end, the TL of early- and latewoods of Korean red pine from 16 provinces of the Republic of Korea was measured and compared to verify the differences (1) between the monitoring years (2014–2018), (2) between early- and latewoods of the trees from the same provinces, and (3) between the early- and latewoods from different provinces. Analysis of 31,500 tracheids revealed that the variation of TL of early- and latewood from two and six out of 16 sites, respectively, were not statistically meaningful and the TL of latewood displayed a lower annual variation than that of the earlywood during the monitoring years. The TL of the latewood was longer than that of the earlywood; however, four out of 16 sites showed shorter TL for the latewood. So, it was verified that the relationship between the TL of the early- and latewood can change. Moreover, the TL was longer for the trees located in the southeast regions.","PeriodicalId":13083,"journal":{"name":"Holzforschung","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141513003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Wood is a heterogeneous material with significant variation among species. This inherent complexity poses a challenge to the continuous expansion of our understanding of the kraft process; yet previous pulping research has mainly been limited to a few species. This study investigates variations among some less studied species and their cell wall level delignification behaviour during kraft pulping. Ground wood of birch, beech, aspen, and alder were pulped at near-constant composition and temperature conditions. Minor, yet significant, differences in the rates of their delignification were observed: aspen had a pronounced fast rate during the initial stage, whereas alder delignified more slowly relative to its high initial lignin content. The dissolution of xylan was substantially faster for birch. In contrast, no substantial differences were detected between the species in the molecular weight and structure of the dissolved wood components, suggesting that the different delignification behaviours stem from variations in the residual phase. The molecular weight distribution of dissolved lignin was uniform during the initial stage of pulping, which is indicative of rapid and extensive fragmentation. Subsequently, the weight increased continuously for the remainder of the process, suggesting that the mass transfer within the cell wall influenced the overall delignification kinetics.
{"title":"A comparative study of the cell wall level delignification behaviour of four Nordic hardwoods during kraft pulping","authors":"Linus Kron, Merima Hasani, Hans Theliander","doi":"10.1515/hf-2024-0011","DOIUrl":"https://doi.org/10.1515/hf-2024-0011","url":null,"abstract":"Wood is a heterogeneous material with significant variation among species. This inherent complexity poses a challenge to the continuous expansion of our understanding of the kraft process; yet previous pulping research has mainly been limited to a few species. This study investigates variations among some less studied species and their cell wall level delignification behaviour during kraft pulping. Ground wood of birch, beech, aspen, and alder were pulped at near-constant composition and temperature conditions. Minor, yet significant, differences in the rates of their delignification were observed: aspen had a pronounced fast rate during the initial stage, whereas alder delignified more slowly relative to its high initial lignin content. The dissolution of xylan was substantially faster for birch. In contrast, no substantial differences were detected between the species in the molecular weight and structure of the dissolved wood components, suggesting that the different delignification behaviours stem from variations in the residual phase. The molecular weight distribution of dissolved lignin was uniform during the initial stage of pulping, which is indicative of rapid and extensive fragmentation. Subsequently, the weight increased continuously for the remainder of the process, suggesting that the mass transfer within the cell wall influenced the overall delignification kinetics.","PeriodicalId":13083,"journal":{"name":"Holzforschung","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141529512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mohammad Ghorbanian Far, Mohammad Najafian Ashrafi, Hooman Shaabani Asrami, Yaser Amiri Moghadam, Ehsan Bari, Peter Niemz, Reza Hosseinpourpia, Javier Ribera
Abstract Beech wood, renowned for its diverse applications spanning construction, flooring, furniture, veneer, and plywood, holds a paramount position among industrial wood species. Nevertheless, the myriad of beech species worldwide, coupled with the dynamic impact of climate change, have produced structural variations within beech trees. Extensive research has scrutinized the physical and mechanical attributes of beech wood species across the globe. Findings reveal distinguishable mechanical strength, yet increased density leads to notable rates of shrinkage and swelling, somewhat constraining its utility in select domains. Identifying research gaps can create new efforts aimed at exploiting the potential of these wood resources. This paper outperforms a mere exploration of beech wood properties over the past two decades; it delves into the ramifications of climatic fluctuations, temperature shifts, wind dynamics, and soil composition. Given the lack of a comprehensive compendium documenting the full range of physical, mechanical, and microscopic attributes of the Fagus genus, this paper aims to compile information that integrates this multifaceted information.
{"title":"Physical and mechanical properties of different beech wood species grown at various climate conditions: a review","authors":"Mohammad Ghorbanian Far, Mohammad Najafian Ashrafi, Hooman Shaabani Asrami, Yaser Amiri Moghadam, Ehsan Bari, Peter Niemz, Reza Hosseinpourpia, Javier Ribera","doi":"10.1515/hf-2023-0117","DOIUrl":"https://doi.org/10.1515/hf-2023-0117","url":null,"abstract":"Abstract Beech wood, renowned for its diverse applications spanning construction, flooring, furniture, veneer, and plywood, holds a paramount position among industrial wood species. Nevertheless, the myriad of beech species worldwide, coupled with the dynamic impact of climate change, have produced structural variations within beech trees. Extensive research has scrutinized the physical and mechanical attributes of beech wood species across the globe. Findings reveal distinguishable mechanical strength, yet increased density leads to notable rates of shrinkage and swelling, somewhat constraining its utility in select domains. Identifying research gaps can create new efforts aimed at exploiting the potential of these wood resources. This paper outperforms a mere exploration of beech wood properties over the past two decades; it delves into the ramifications of climatic fluctuations, temperature shifts, wind dynamics, and soil composition. Given the lack of a comprehensive compendium documenting the full range of physical, mechanical, and microscopic attributes of the Fagus genus, this paper aims to compile information that integrates this multifaceted information.","PeriodicalId":13083,"journal":{"name":"Holzforschung","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141334831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Saadabadi, Ekaterina Korotkova, Patrik C Eklund
Abstract Scots pine knotwood contains valuable amount of stilbenoids such as pinosylvin (Ps) and pinosylvin monomethyl ether (PsMME). The stilbenoids have numerous biological activities. Traditional methods of extracting stilbenoids often yield low quantities and involve complex processes. In the present study, a simple and high-yield method was proposed for the extraction of stilbenoids from fresh Scots pine knotwood using ethanol taking a total of three days. In addition, the impact of drying process, extraction time, extraction solvents (acetone and ethanol) and storage time were evaluated on the yield of the stilbenoids. The increased yield and improved extraction efficiency make this method a promising advancement for promoting the utilization of stilbenoids for their valuable bioactive properties.
{"title":"Isolation of stilbenoids from fresh knotwood of Scots pine using a high yield method","authors":"A. Saadabadi, Ekaterina Korotkova, Patrik C Eklund","doi":"10.1515/hf-2024-0001","DOIUrl":"https://doi.org/10.1515/hf-2024-0001","url":null,"abstract":"Abstract Scots pine knotwood contains valuable amount of stilbenoids such as pinosylvin (Ps) and pinosylvin monomethyl ether (PsMME). The stilbenoids have numerous biological activities. Traditional methods of extracting stilbenoids often yield low quantities and involve complex processes. In the present study, a simple and high-yield method was proposed for the extraction of stilbenoids from fresh Scots pine knotwood using ethanol taking a total of three days. In addition, the impact of drying process, extraction time, extraction solvents (acetone and ethanol) and storage time were evaluated on the yield of the stilbenoids. The increased yield and improved extraction efficiency make this method a promising advancement for promoting the utilization of stilbenoids for their valuable bioactive properties.","PeriodicalId":13083,"journal":{"name":"Holzforschung","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141350059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The increasing recognition of the need for economically viable carbon materials in supercapacitors has resulted in a notable emphasis on utilizing recycled biomass waste as a precursor for activated carbon (AC). This study investigates the production of highly porous AC through vertically aligned graphene nanosheet arrays (VAGNAs) derived from bamboo parenchyma cells, a type of biomass waste. The focus lies in manipulating the ratio of alkali to carbon during the activation process. Elevating the alkali-carbon ratio augments the specific surface area of the AC while concurrently reducing the presence of VAGNAs. Surprisingly, AC generated with an alkali-carbon ratio of four exhibits a remarkable specific capacitance of 215 F g−1 when subjected to a current density of 0.2 A g−1. When integrated into a supercapacitor apparatus, this AC material demonstrates a notable energy density of 11.2 W-hours per kilogram (Wh kg−1) at a power density of 50 W per kilogram (W kg−1). Moreover, it displays exceptional cycling stability, maintaining 89.4 % of its capacitance after undergoing 10,000 cycles in a 6 M potassium hydroxide electrolyte. The findings of this investigation underscore the potential of utilizing waste bamboo parenchyma cells for sustainable energy storage applications.
摘要 由于人们日益认识到超级电容器需要经济可行的碳材料，因此利用回收的生物质废物作为活性炭（AC）的前体受到了广泛重视。本研究探讨了通过垂直排列的石墨烯纳米片阵列（VAGNAs）生产高多孔活性炭的方法，该阵列来自竹子实质细胞（一种生物质废物）。研究重点在于活化过程中碱与碳的比例。提高碱碳比可增加 AC 的比表面积，同时减少 VAGNA 的存在。令人惊讶的是，当电流密度为 0.2 A g-1 时，碱碳比为 4 的交流电产生的比电容高达 215 F g-1。当这种交流电材料集成到超级电容器装置中时，在功率密度为每千克 50 瓦（W kg-1）时，其能量密度可达每千克 11.2 瓦时（Wh kg-1）。此外，它还显示出卓越的循环稳定性，在 6 M 氢氧化钾电解液中循环 10,000 次后仍能保持 89.4% 的电容。这项研究成果强调了利用废弃竹子实质细胞进行可持续能源储存应用的潜力。
{"title":"Preparation of biomass activated carbon with aligned graphene nanosheet arrays from bamboo parenchymal cells for supercapacitors","authors":"Yao Xia, Zhigao Liu, Yuxiang Huang","doi":"10.1515/hf-2024-0005","DOIUrl":"https://doi.org/10.1515/hf-2024-0005","url":null,"abstract":"Abstract The increasing recognition of the need for economically viable carbon materials in supercapacitors has resulted in a notable emphasis on utilizing recycled biomass waste as a precursor for activated carbon (AC). This study investigates the production of highly porous AC through vertically aligned graphene nanosheet arrays (VAGNAs) derived from bamboo parenchyma cells, a type of biomass waste. The focus lies in manipulating the ratio of alkali to carbon during the activation process. Elevating the alkali-carbon ratio augments the specific surface area of the AC while concurrently reducing the presence of VAGNAs. Surprisingly, AC generated with an alkali-carbon ratio of four exhibits a remarkable specific capacitance of 215 F g−1 when subjected to a current density of 0.2 A g−1. When integrated into a supercapacitor apparatus, this AC material demonstrates a notable energy density of 11.2 W-hours per kilogram (Wh kg−1) at a power density of 50 W per kilogram (W kg−1). Moreover, it displays exceptional cycling stability, maintaining 89.4 % of its capacitance after undergoing 10,000 cycles in a 6 M potassium hydroxide electrolyte. The findings of this investigation underscore the potential of utilizing waste bamboo parenchyma cells for sustainable energy storage applications.","PeriodicalId":13083,"journal":{"name":"Holzforschung","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141370970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study aimed to investigate the elastic deformation of rotational wood-dowel welding joints by using the variational method, as there was no efficient tool to access the deformation behavior of welding joints perpendicular to axis orientation so far. Based on the variational method, the displacement control equation of axially-loaded dowel-welded wood joints was derived. By incorporating the boundary conditions and using an iterative approach, the parameters required in the control equation were determined. The analytical expression ϕ(r) for the deformation function of the wood substrate under elastic conditions was proposed, thereby determining the displacement and axial force of the single wood-dowel. The elasticity modulus was the primary influence parameter on the function ϕ(r). However, the welding depth had a more critical impact, and reasonable combination of parameters could lead to a better interaction between the wood dowel and substrate. The comparison between calculated results and test trials collected from the previous studies indicated that the elastic solution method could accurately estimate the pull-out ultimate bearing capacity and deformation characteristics of the welding joints. This work can provide unique perspective to understand the technology of rotational wood-dowel welding joints, and a good reference suggestion for the manufacture of multi-dowel welding joints.
{"title":"Elastic deformation analysis of rotational wood-dowel welding joint system based on the variational method","authors":"Yun Xu, Xuejiao Wang","doi":"10.1515/hf-2024-0003","DOIUrl":"https://doi.org/10.1515/hf-2024-0003","url":null,"abstract":"\u0000 This study aimed to investigate the elastic deformation of rotational wood-dowel welding joints by using the variational method, as there was no efficient tool to access the deformation behavior of welding joints perpendicular to axis orientation so far. Based on the variational method, the displacement control equation of axially-loaded dowel-welded wood joints was derived. By incorporating the boundary conditions and using an iterative approach, the parameters required in the control equation were determined. The analytical expression ϕ(r) for the deformation function of the wood substrate under elastic conditions was proposed, thereby determining the displacement and axial force of the single wood-dowel. The elasticity modulus was the primary influence parameter on the function ϕ(r). However, the welding depth had a more critical impact, and reasonable combination of parameters could lead to a better interaction between the wood dowel and substrate. The comparison between calculated results and test trials collected from the previous studies indicated that the elastic solution method could accurately estimate the pull-out ultimate bearing capacity and deformation characteristics of the welding joints. This work can provide unique perspective to understand the technology of rotational wood-dowel welding joints, and a good reference suggestion for the manufacture of multi-dowel welding joints.","PeriodicalId":13083,"journal":{"name":"Holzforschung","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141098243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Meihong Liu, Liangliang Zhang, Jiang Chen, Shuang Chen, Yafang Lei, Zhangjing Chen, Li Yan
The magnitudes of the color changes in heat-treated wood are closely related to the chemical composition of the wood, and changes in the chemical composition are the essential reasons for changes in the mechanical properties of heat-treated wood. The response relationships among the color parameters of heat-treated wood and the chemical composition were constructed to provide a scientific basis for regulating the mechanical properties with the color. The effects and linear correlations of the lightness indicators (L*) for poplar (Populus tomentosa Carr.) and spruce (Picea asperata Mast.) after heat treatment were related to the chemical compositions of the heat-treated woods by constructing relationships between the L* values. The relative content of cellulose in the heat-treated poplar downward trend and was significantly positively correlated with the L* value; however, the correlation with the L* value for the heat-treated spruce was insignificant. The L* value of the heat-treated wood was significantly positively correlated with the relative contents of hemicellulose, and was significantly negatively correlated with lignin. The L* value of the heat-treated wood had a superior response relationship with the crystallite sizes. Therefore, the constructed response relationship provides a theoretical basis for accurate and nondestructive testing of the mechanical properties of heat-treated wood by using the color parameters as rapid detection indicators.
{"title":"Response relationships between the color parameters and chemical compositions of heat-treated wood","authors":"Meihong Liu, Liangliang Zhang, Jiang Chen, Shuang Chen, Yafang Lei, Zhangjing Chen, Li Yan","doi":"10.1515/hf-2023-0086","DOIUrl":"https://doi.org/10.1515/hf-2023-0086","url":null,"abstract":"\u0000 The magnitudes of the color changes in heat-treated wood are closely related to the chemical composition of the wood, and changes in the chemical composition are the essential reasons for changes in the mechanical properties of heat-treated wood. The response relationships among the color parameters of heat-treated wood and the chemical composition were constructed to provide a scientific basis for regulating the mechanical properties with the color. The effects and linear correlations of the lightness indicators (L*) for poplar (Populus tomentosa Carr.) and spruce (Picea asperata Mast.) after heat treatment were related to the chemical compositions of the heat-treated woods by constructing relationships between the L* values. The relative content of cellulose in the heat-treated poplar downward trend and was significantly positively correlated with the L* value; however, the correlation with the L* value for the heat-treated spruce was insignificant. The L* value of the heat-treated wood was significantly positively correlated with the relative contents of hemicellulose, and was significantly negatively correlated with lignin. The L* value of the heat-treated wood had a superior response relationship with the crystallite sizes. Therefore, the constructed response relationship provides a theoretical basis for accurate and nondestructive testing of the mechanical properties of heat-treated wood by using the color parameters as rapid detection indicators.","PeriodicalId":13083,"journal":{"name":"Holzforschung","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140961860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Using pyrolysis–gas chromatography–mass spectrometry, the lignin composition was analysed in normal and reaction wood samples grown at three stem inclination angles in Gardenia jasminoides, which forms compression wood-like reaction wood. Lignin content among the samples was not significantly different. However, the reaction wood samples with larger stem inclination angles showed a lower syringyl/guaiacyl ratio. In conclusion, the degree of inclination affected the lignin composition in G. jasminoides reaction wood, and qualitative changes in lignin might be necessary to mechanically support the stems in this species.
{"title":"Determination of lignin composition in compression wood-like reaction wood of angiosperm Gardenia jasminoides by pyrolysis–gas chromatography–mass spectrometry","authors":"Haruna Aiso, Tatsuya Ashitani, Futoshi Ishiguri","doi":"10.1515/hf-2023-0123","DOIUrl":"https://doi.org/10.1515/hf-2023-0123","url":null,"abstract":"Using pyrolysis–gas chromatography–mass spectrometry, the lignin composition was analysed in normal and reaction wood samples grown at three stem inclination angles in <jats:italic>Gardenia jasminoides</jats:italic>, which forms compression wood-like reaction wood. Lignin content among the samples was not significantly different. However, the reaction wood samples with larger stem inclination angles showed a lower syringyl/guaiacyl ratio. In conclusion, the degree of inclination affected the lignin composition in <jats:italic>G. jasminoides</jats:italic> reaction wood, and qualitative changes in lignin might be necessary to mechanically support the stems in this species.","PeriodicalId":13083,"journal":{"name":"Holzforschung","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140936368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jieying Yuan, Yibo Li, Shulei Li, Zheyun Liu, Yunjing Lu, Shuoyu Dang, Fan Ding, Ruijin Yu, Jie Chu
Pretreatment serves as an important step in maximizing the efficient utilization of woody biomass feedstock. This study focused on enhancing the component and structural properties of apple wood to optimize the utilization of apple wood resources effectively. This study presents the optimization of, the apple wood pretreatment system, combining bioenzyme and hydrothermal treatments. This study aimed to investigate the effect of different bioenzyme pretreatment conditions on the components and structural properties of apple wood extract and to analyze the feasibility of enzyme solution reuse. Fourier transform infrared spectroscopy analysis revealed an increase in cellulose content in the wood flour following enzyme treatment. Concurrently, changes in characteristic peaks indicated an increased hemicellulose content and a reduction in lignin content after the pretreatment, correlating with fraction analysis results. Scanning electron microscopy illustrated that the dense structure of the fiber surface was disrupted after treatment. Notably, the results indicated that the recovered biocomposite enzymes exhibited excellent activity, suggesting their potential for reuse.
{"title":"Hydrothermal enzyme pretreatment on structure and properties of apple branches","authors":"Jieying Yuan, Yibo Li, Shulei Li, Zheyun Liu, Yunjing Lu, Shuoyu Dang, Fan Ding, Ruijin Yu, Jie Chu","doi":"10.1515/hf-2023-0103","DOIUrl":"https://doi.org/10.1515/hf-2023-0103","url":null,"abstract":"Pretreatment serves as an important step in maximizing the efficient utilization of woody biomass feedstock. This study focused on enhancing the component and structural properties of apple wood to optimize the utilization of apple wood resources effectively. This study presents the optimization of, the apple wood pretreatment system, combining bioenzyme and hydrothermal treatments. This study aimed to investigate the effect of different bioenzyme pretreatment conditions on the components and structural properties of apple wood extract and to analyze the feasibility of enzyme solution reuse. Fourier transform infrared spectroscopy analysis revealed an increase in cellulose content in the wood flour following enzyme treatment. Concurrently, changes in characteristic peaks indicated an increased hemicellulose content and a reduction in lignin content after the pretreatment, correlating with fraction analysis results. Scanning electron microscopy illustrated that the dense structure of the fiber surface was disrupted after treatment. Notably, the results indicated that the recovered biocomposite enzymes exhibited excellent activity, suggesting their potential for reuse.","PeriodicalId":13083,"journal":{"name":"Holzforschung","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140887845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jiawei Huang, Xiuyi Lin, Weiwei Zhang, Litao Guan, Jiangtao Xu, Jin Gu, Yonghui Zhou, Chuanshuang Hu
Camellia oleifera Abel. shell (COS) is an agricultural waste in quantities exceeding a million tons annually. The ultrastructure of the COS cell wall and the distribution of lignocellulose components were investigated. The microscopic results showed that COS contains two types of cells, sclerenchyma cells (SC) and parenchyma cells (PC). SC contained 50.4 % hemicellulose, 17.6 % cellulose and 30.9 % lignin while PC contained 35.2 % hemicellulose, 23.7 % cellulose and 35.0 % lignin. The distribution of lignocellulose components in COS is non-homogeneous. Lignin is alternately distributed with polysaccharides in the PC wall. In SC, hemicellulose is mainly present in the secondary wall S2, while lignin was mainly found in the compound middle lamella, and cellulose mainly exists in the secondary wall, S3. A comprehensive model of the cell wall ultrastructure and lignocellulose distribution of COS was given. This study provides a fundamental understanding of COS cell walls and can aid in the future graded utilization of COS.
油茶果壳（COS）是一种农业废弃物，每年的产量超过一百万吨。研究人员对 COS 细胞壁的超微结构和木质纤维素成分的分布进行了调查。显微镜结果显示，COS 包含两种类型的细胞，即小叶细胞（SC）和实质细胞（PC）。SC含有50.4%的半纤维素、17.6%的纤维素和30.9%的木质素，而PC含有35.2%的半纤维素、23.7%的纤维素和35.0%的木质素。木质纤维素成分在 COS 中的分布并不均匀。木质素与多糖交替分布在 PC 壁中。在 SC 中，半纤维素主要存在于次生壁 S2 中，而木质素主要存在于复合中层中，纤维素主要存在于次生壁 S3 中。该研究给出了 COS 细胞壁超微结构和木质纤维素分布的综合模型。这项研究提供了对 COS 细胞壁的基本认识，有助于今后对 COS 的分级利用。
{"title":"Cell wall composition of Camellia oleifera Abel. shell: new insights into its composition distribution and ultrastructure","authors":"Jiawei Huang, Xiuyi Lin, Weiwei Zhang, Litao Guan, Jiangtao Xu, Jin Gu, Yonghui Zhou, Chuanshuang Hu","doi":"10.1515/hf-2023-0120","DOIUrl":"https://doi.org/10.1515/hf-2023-0120","url":null,"abstract":"<jats:italic>Camellia oleifera</jats:italic> Abel. shell (COS) is an agricultural waste in quantities exceeding a million tons annually. The ultrastructure of the COS cell wall and the distribution of lignocellulose components were investigated. The microscopic results showed that COS contains two types of cells, sclerenchyma cells (SC) and parenchyma cells (PC). SC contained 50.4 % hemicellulose, 17.6 % cellulose and 30.9 % lignin while PC contained 35.2 % hemicellulose, 23.7 % cellulose and 35.0 % lignin. The distribution of lignocellulose components in COS is non-homogeneous. Lignin is alternately distributed with polysaccharides in the PC wall. In SC, hemicellulose is mainly present in the secondary wall S<jats:sub>2</jats:sub>, while lignin was mainly found in the compound middle lamella, and cellulose mainly exists in the secondary wall, S<jats:sub>3</jats:sub>. A comprehensive model of the cell wall ultrastructure and lignocellulose distribution of COS was given. This study provides a fundamental understanding of COS cell walls and can aid in the future graded utilization of COS.","PeriodicalId":13083,"journal":{"name":"Holzforschung","volume":null,"pages":null},"PeriodicalIF":2.4,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140887778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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