Annals of WULS, Forestry and Wood Technology最新文献_第6页

Analysis of quantitative and qualitative extractive components extracted from hornbeam (Carpinus betulus L.) and yakal (Shorea astylosa Foxw.) wood 牛角木(Carpinus betulus L.)和牦牛木(Shorea astylosa Foxw.)中提取成分的定量和定性分析

Annals of WULS, Forestry and Wood Technology Pub Date : 2022-04-30 DOI: 10.5604/01.3001.0015.8937

Dominik Sierant, Dominka Szadkowska

{"title":"Analysis of quantitative and qualitative extractive components extracted from hornbeam (Carpinus betulus L.) and yakal (Shorea astylosa Foxw.) wood","authors":"Dominik Sierant, Dominka Szadkowska","doi":"10.5604/01.3001.0015.8937","DOIUrl":"https://doi.org/10.5604/01.3001.0015.8937","url":null,"abstract":"The aim of the study was analysis of quantitative and qualitative extractive components extracted from hornbeam (Carpinus betulus L.) and yakal (Shorea astylosa Foxw.) wood. Two wood species similar to each other in terms of microscopic structure and physical properties, the native wood of Hornbeam (Carpinus betulus L.) and the yakal wood (Shorea astylosa Foxw.) endemic to the Philippines, which is still little understood, were investigated. Wood is a material composed mainly of polymers called lignocellulose which includes: (cellulose, lignin and hemicelluloses), but also contains many extractive and mineral substances. . The extractive content of wood in temperate climates is approximately for up to 5% by weight of wood. Their identification is difficult because of the wide variety and multiplicity of compounds present. However, extractive compounds are important for the resistance of trees and wood to biological agents such as fungal infestation or insect infestation. Usually the zones of dead wood (heartwood or cored wood) are characterized by a higher content of extractives. The understanding of the chemical composition of extractives in wood can contribute to the development of wood preservative products and environmentally friendly and would be part of the green chemistry policy.\u0000\u0000","PeriodicalId":8020,"journal":{"name":"Annals of WULS, Forestry and Wood Technology","volume":"79 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80994626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The study of selected properties of pine wood (Pinus sylvestris L.) subjected to acetylation 乙酰化处理对松材(Pinus sylvestris L.)若干特性的影响

Annals of WULS, Forestry and Wood Technology Pub Date : 2022-04-30 DOI: 10.5604/01.3001.0015.8667

Tomasz Gliszczyński, A. Antczak

{"title":"The study of selected properties of pine wood (Pinus sylvestris L.) subjected \u0000to acetylation","authors":"Tomasz Gliszczyński, A. Antczak","doi":"10.5604/01.3001.0015.8667","DOIUrl":"https://doi.org/10.5604/01.3001.0015.8667","url":null,"abstract":"The study of selected properties of pine wood (Pinus sylvestris L.) subjected to acetylation. In the paper pine wood was subjected to acetylation with acetic anhydride and mixture of acetic anhydride and glacial acetic acid (50:50)v/v. After modification process density, WPG index, water absorbability, volume swelling and colour of wood were carried out and compared with results obtained for unmodified pine wood. Based on the obtained results the density of acetylated pine wood was increased for each group of samples. The highest WPG index was obtained for previously dried wood modified with acetic anhydride (15.6%) or mixture of acetic anhydride and glacial acetic acid (10.5%). Acetylation process with acetic anhydride or mixture of acetic anhydride and glacial acetic acid of samples, which were extracted (in chloroform-ethanol 93:7w/w mixture) and dried before modification, had beneficial effect on water absorbability of pine wood. These samples after 1001h (about 42 days) of soaking in water reached the lowest values of water absorbability (about 94%). Moreover, the volume swelling were significantly reduced for samples after double impregnation cycle (both in case of modification with acetic anhydride or mixture of acetic anhydride and glacial acetic acid). Wood after acetylation process was slightly darker than unmodified pine wood. Acetylation of samples, which were dried and soaked in DMF before modification, caused significant darkening of pine wood. The obtained colour was similar to colour of furfurylated wood (Kebony wood) or some of exotic species.\u0000\u0000","PeriodicalId":8020,"journal":{"name":"Annals of WULS, Forestry and Wood Technology","volume":"184 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77155371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of the glue joint on the speed of propagation of sound waves in wood 胶缝对声波在木材中传播速度的影响

Annals of WULS, Forestry and Wood Technology Pub Date : 2022-04-30 DOI: 10.5604/01.3001.0015.9057

Alicja Banaś, Zbigniew Karwat

引用次数: 0

Giganten-wechsel in Europäische Sägeindustrie 握手

Annals of WULS, Forestry and Wood Technology Pub Date : 2022-04-30 DOI: 10.5604/01.3001.0015.9278

T. Kłosińska, S. Krzosek

引用次数: 0

The influence of microbiological medium composition on the efficiency of bacterial cellulose synthesis 微生物培养基组成对细菌纤维素合成效率的影响

Annals of WULS, Forestry and Wood Technology Pub Date : 2022-04-30 DOI: 10.5604/01.3001.0015.8701

K. Chlebiej, I. Betlej

引用次数: 0

Classics of Polish Design. Polish avant-garde Bauhaus style furniture from the interwar period 波兰设计经典。两次世界大战期间的波兰前卫包豪斯风格家具

Annals of WULS, Forestry and Wood Technology Pub Date : 2022-04-30 DOI: 10.5604/01.3001.0015.8689

A. Różańska, Karolina Bodych

{"title":"Classics of Polish Design. Polish avant-garde Bauhaus style furniture from the interwar period","authors":"A. Różańska, Karolina Bodych","doi":"10.5604/01.3001.0015.8689","DOIUrl":"https://doi.org/10.5604/01.3001.0015.8689","url":null,"abstract":"Classics of Polish Design. Polish avant-garde Bauhaus style furniture from the interwar period presents a review of the best Polish furniture designs from the 1920s and 1930s. In spite of the inspirations with historicism popular in the interwar period and the references to folk culture (e.g., the \"Ład\" Artists' Cooperative), Polish designers also drew inspiration from the works of the following artists: Le Corbusier, Marcel Breuer, Mies van der Rohe and Mart Stam, who designed avant-garde furniture made of metal pipes. The paper presents little known works of Polish artists from the groups \"Praesens\", \"Atelier wnętrz i architektury\" (The Atelier of Interiors and Architecture), \"Studium wnętrz i sprzętu\" (Studio of Interiors and Equipment), as well as furniture designs referring to the Bauhaus style for private and public interiors (including designs for transatlantics or the President's Castle in Wisła), among others, manufactured by the Thonet-Mundus company. The paper continues the series devoted to the \"Classics of Polish Design\", presenting the results of research on Polish furniture, carried out within the framework of dissertations in the Department of Wood Technology in the Warsaw University of Life Sciences (SGGW).\u0000\u0000","PeriodicalId":8020,"journal":{"name":"Annals of WULS, Forestry and Wood Technology","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80755272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Compression strength-focused properties of wood composites induced by structure 木结构复合材料抗压强度聚焦性能研究

Annals of WULS, Forestry and Wood Technology Pub Date : 2021-12-30 DOI: 10.5604/01.3001.0015.6879

G. Kowaluk, Aleksandra Jeżo

{"title":"Compression strength-focused properties of wood composites induced by structure","authors":"G. Kowaluk, Aleksandra Jeżo","doi":"10.5604/01.3001.0015.6879","DOIUrl":"https://doi.org/10.5604/01.3001.0015.6879","url":null,"abstract":"Compression strength-focused properties of wood composites induced by structure. The aim of the following study was to examine the contractual compression strength and modulus of elasticity when compressing (MOEC) of three different wood composites with various structure types: softwood (coniferous) plywood, OSB and laminated particleboard 24 mm thick. The biggest MOEC value was performed by the particleboard laminated 24 mm MOEC equalling 70.00 N/mm2. The second was found by the OSB panels, equalling 63.03 N/mm2. Last, but with MOEC value close to OSB, was softwood plywood with MOEC of 62.44 N/mm2. The lowest compression strength was observed by OSB samples, with a value of 2.75 N/mm2. The second lowest value has been performed by coniferous plywood (2.80 N/mm2). The highest compression strength occurred by the particleboard laminated 24 mm, equalling 3.31 N/mm2. Density shares and density profiles of the samples were also analysed, all of the examined composites performed U-shaped density profile The results of the study showed that there is no significant correlation between density and obtained parameters under compression. Observation of density share let the Authors conclude conversely than the results showed. It is supposed that the key factor affecting the compression performance of samples was the adhesive area and solid glue content within the composites. It is assumed that the bigger total contact surface of wood particles coated with adhesive resin, so the sum of the effective (gluing particles) surfaces of the adhesive joint is the better mechanical properties can be performed. This is why the laminated particleboard gave the best mechanical properties, while the worst were observed by the softwood plywood.\u0000\u0000","PeriodicalId":8020,"journal":{"name":"Annals of WULS, Forestry and Wood Technology","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74585148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of selected properties of the black elder wood (Sambucus nigra L.) 黑接骨木(Sambucus nigra L.)部分特性的研究

Annals of WULS, Forestry and Wood Technology Pub Date : 2021-12-30 DOI: 10.5604/01.3001.0015.6640

P. Kozakiewicz, Marcin Dadon, M. Marchwicka

引用次数: 2

Preparation of nanocellulose by hydrolysis with ionic liquids and two-step hydrolysis with ionic liquids and enzymes 离子液体水解及离子液体与酶两步水解制备纳米纤维素

Annals of WULS, Forestry and Wood Technology Pub Date : 2021-12-30 DOI: 10.5604/01.3001.0015.6636

M. Babicka, M. Woźniak, K. Szentner, S. Borysiak, K. Dwiecki, I. Ratajczak

{"title":"Preparation of nanocellulose by hydrolysis with ionic liquids and two-step \u0000hydrolysis with ionic liquids and enzymes","authors":"M. Babicka, M. Woźniak, K. Szentner, S. Borysiak, K. Dwiecki, I. Ratajczak","doi":"10.5604/01.3001.0015.6636","DOIUrl":"https://doi.org/10.5604/01.3001.0015.6636","url":null,"abstract":"The aim of this study was to compare parameters of nanocellulose obtained by two different procedures:\u0000hydrolysis with ionic liquids (1-allyl-3-methylimidazolium chloride and 1-ethyl-3-methylimidazolium acetate) and \u0000hydrolysis with ionic liquids in combination with hydrolysis using a cellulolytic enzyme from Trichoderma reesei.\u0000Avicel cellulose was treated with two ionic liquids: 1-allyl-3-methylimidazolium chloride (AmimCl) and 1-ethyl 3-methylimidazolium acetate (EmimOAc). In the two-step hydrolysis cellulose after treatment with ionic liquids \u0000was additionally hydrolyzed with a solution of enzymes. In order to characterize the obtained material, the \u0000following analyses were used: infrared spectroscopy, X-ray diffraction and dynamic light scattering. The results \u0000indicated that cellulose obtained by two-step nanocellulose production methods (first hydrolysis with ionic liquids \u0000and then with enzymes) showed similar parameters (particle size, XRD patterns and degree of crystallinity) as the \u0000material after the one-step process, i.e. hydrolysis with ionic liquids.\u0000\u0000","PeriodicalId":8020,"journal":{"name":"Annals of WULS, Forestry and Wood Technology","volume":"207 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80483400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Measurement of tool wear using a non-contact method, using a laser measuring system 使用非接触方法测量刀具磨损，使用激光测量系统

Annals of WULS, Forestry and Wood Technology Pub Date : 2021-12-30 DOI: 10.5604/01.3001.0015.6637

Bartłomiej Grzegorzewski, P. Król

引用次数: 0