Maderas-ciencia Y Tecnologia最新文献

Natural durability of some hardwoods imported into Korea for deck boards against decay fungi and subterranean termite in accelerated laboratory tests 在加速实验室测试中，一些进口到韩国的甲板用硬木对腐烂真菌和地下白蚁的天然耐久性

IF 1.5 4区农林科学

Maderas-ciencia Y Tecnologia Pub Date : 2023-07-01 DOI: 10.4067/s0718-221x2023000100437

Jeong-Joo Oh, Y. Choi, Min-Ji Kim, Gyu-Hyeok Kim

{"title":"Natural durability of some hardwoods imported into Korea for deck boards against decay fungi and subterranean termite in accelerated laboratory tests","authors":"Jeong-Joo Oh, Y. Choi, Min-Ji Kim, Gyu-Hyeok Kim","doi":"10.4067/s0718-221x2023000100437","DOIUrl":"https://doi.org/10.4067/s0718-221x2023000100437","url":null,"abstract":"This study evaluated the natural durability of seven imported hardwoods Bangkirai ( Shorea laevis ), Burckella ( Burckella .), Ipe ( Handroanthus .), Jarrah ( Eucalyptus marginata .), Kempas ( Koompassia malaccensi ), Malas ( Homalium foetidum ) and Merbau ( Instia ) used for deck boards against decay fungi ( Fomitopsis palustris , Gloeophyllum trabeum , Trametes versicolor , and Irpex lacteus ) and the subterranean termite ( Reticulitermes speratus kyushuensis ) in accelerated laboratory tests. Ipe, Jarrah, and Merbau were very durable to fungal attack, with performance comparable to ACQ-treated wood. Bangkirai, Burckella, Kem-pas, and Malas were classified as durable or moderately durable, depending on the fungal species tested. All wood species except for Merbau were highly resistant to termite attack. Termite resistance was similar to ACQ-treated wood. Merbau showed somewhat less than all other species but still significant termite resis - tance. These results indicated that selected naturally durable hardwood species could inhibit fungal and termite attacks as effectively as ACQ treatment. The natural durability of wood species tested in this study is most likely due to the biocidal extractive content of the","PeriodicalId":18092,"journal":{"name":"Maderas-ciencia Y Tecnologia","volume":"260 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75764688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Water absorption, thickness swelling and mechanical properties of cement bonded wood composite treated with water repellent 拒水剂处理水泥木复合材料的吸水率、厚度膨胀率及力学性能

IF 1.5 4区农林科学

Maderas-ciencia Y Tecnologia Pub Date : 2023-05-01 DOI: 10.4067/s0718-221x2023000100434

Semiha Yılmazer, U. Aras, H. Kalaycioğlu, A. Temiz

{"title":"Water absorption, thickness swelling and mechanical properties of cement bonded wood composite treated with water repellent","authors":"Semiha Yılmazer, U. Aras, H. Kalaycioğlu, A. Temiz","doi":"10.4067/s0718-221x2023000100434","DOIUrl":"https://doi.org/10.4067/s0718-221x2023000100434","url":null,"abstract":"In this study, the purpose was to improve outdoor performance of cement bonded wood composite due to their biodegradation and sensitivity to moisture especially in warm and humid climates. Cement bonded wood composites were treated with different concentrations (10 %, 25 %, 50 %, 75 % and 100 %) of water repe - llent. Water repellent used was an organo-silicon based, nano-sized, eco-friendly, water-based agents. Dipping and pressure systems were applied for composite treatment. Water absorption, thickness swelling, accelerated weathering, color changes and mechanical properties after accelerated weathering were determined for treated and untreated cement-bonded composites. Results showed that treatment of composites with water repellent provided a transparent layer on composite surface. Thus, lower water absorption and thickness swelling results in the beginning of immersion in water. Treated and untreated composites were exposed to an accelerated weathering test for 350 h. Their mechanical strength including modulus of rupture, modulus of elasticity and internal bonding properties were decreased after 350 h of weathering. However, overall results after weathe-ring test showed that all panels’ mechanical properties provided minimum modulus of rupture, modulus of elasticity and internal bonding requirements of the EN standards.","PeriodicalId":18092,"journal":{"name":"Maderas-ciencia Y Tecnologia","volume":"16 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90898758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Un enfoque de machine learning para la predicción de la calidad de tableros contrachapados 预测胶合板质量的机器学习方法

IF 1.5 4区农林科学

Maderas-ciencia Y Tecnologia Pub Date : 2023-05-01 DOI: 10.4067/s0718-221x2023000100436

Cynthia Urra-González, Mario Ramos-Maldonado

{"title":"Un enfoque de machine learning para la predicción de la calidad de tableros contrachapados","authors":"Cynthia Urra-González, Mario Ramos-Maldonado","doi":"10.4067/s0718-221x2023000100436","DOIUrl":"https://doi.org/10.4067/s0718-221x2023000100436","url":null,"abstract":"38 Because of the impact on productivity and cost reduction, decision making in industrial processes is one of 39 the most required aspects in the industry. Specifically in the panel industries, product quality depends on 40 multiple variables, especially wood variability. Among other factors, quality depends on the adhesion of 41 veneers or perpendicular tensile strength. The main objective of this study was to evaluate a Machine 42 Learning approach to predict the adhesion under industrial conditions in the gluing and pre-pressing stage. 43 The control variables that determine this adhesion are mainly: operational times, amount of adhesive, 44 environmental conditions, and veneer temperature. Using Knowledge Discovery in Databases data analytics 45 methodology, Artificial Neural Networks and Support Vector Machine were evaluated. Sigmoid activation 46 function was used with 3 hidden layers and 245 neurons. In addition to the Adam optimizer, Multi-Layer 47 Perceptron, Artificial Neural Networks delivered the best accuracy levels of over 66 %. Best result with Relu 48 and Sigmoid functions were obtained. Sigmoid showed accuracy over 66 %, precision fit good to find 49 positive results (70 %). Relu function obtained the best recall (over 74 %) showing a good capacity to identify 50 reality. Results show that it is not sufficient to generate a data set using the averages of each process variable, 51 since it is difficult to obtain better results with the algorithms evaluated. This work contributes to defining a 52 methodology to be used in plywood plants using industrial data to train and validate Machine Learning 53 models. 54","PeriodicalId":18092,"journal":{"name":"Maderas-ciencia Y Tecnologia","volume":"8 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82850867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Evaluation of bean residues in the production of agglomerated panels 聚块板生产中豆渣的评价

IF 1.5 4区农林科学

Maderas-ciencia Y Tecnologia Pub Date : 2023-05-01 DOI: 10.4067/s0718-221x2023000100432

Eduardo Miranda, Diogo Antonio Correa Gomes, Ana Carolina Corrêa Furtini, Denisse Concepción Vega Villarruel, C. A. Santos, L. Mendes, J. B. Guimarães Júnior

{"title":"Evaluation of bean residues in the production of agglomerated panels","authors":"Eduardo Miranda, Diogo Antonio Correa Gomes, Ana Carolina Corrêa Furtini, Denisse Concepción Vega Villarruel, C. A. Santos, L. Mendes, J. B. Guimarães Júnior","doi":"10.4067/s0718-221x2023000100432","DOIUrl":"https://doi.org/10.4067/s0718-221x2023000100432","url":null,"abstract":"This work aimed to evaluate the physical-mechanical properties of Pinus oocarpa wood agglomerated panels produced with different levels (0 %, 25 %, 50 %, 75 % and 100 %) of wood replacement with bean residues. For this purpose, Pinus oocarpa wood and the agricultural residue were reduced into particles and their properties of apparent density, extractives, lignin and ash content of these raw materials were determined. Then, the particles were dried to a 3 % humidity and granulometrically selected to produce panels with a den - sity of 0,60 g/cm 3 . These particles were bonded using 12 % urea-formaldehyde adhesive, pressed, following normative dimensions (250 mm x 250 mm x 15 mm (width, length, and thickness)), and kept in a climate-con - trolled environment (20 ºC ± 2 ºC and 65 % ± 5 % RH) until the physical and mechanical tests were carried out. The research results indicated that the particles from bean residues in comparison with Pinus oocarpa wood, presented low density, lignin and holocellulose values, and higher extractives data. Furthermore, regarding the characterization of the panels, there was a trend towards uniformity in the apparent density values, an increase in the properties of compact ratio, water absorption and thickness swelling, and a decrease in their mechanical properties associated with the increase in the by-product addition to the panels. Therefore, new studies are necessary, seeking a larger study and greater knowledge of the addition effects of bean residues in particulate panels, aiming the dissemination of this sustainable process on large scale.","PeriodicalId":18092,"journal":{"name":"Maderas-ciencia Y Tecnologia","volume":"19 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79218449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 2

Cellulose biosaccharification by Irpex lacteus wood decay fungus 木腐菌对纤维素的生物糖化作用

IF 1.5 4区农林科学

Maderas-ciencia Y Tecnologia Pub Date : 2023-05-01 DOI: 10.4067/s0718-221x2023000100435

S. Boiko, M. Netsvetov, V. Radchenko

引用次数: 0

Research of computerized numerical control laser processing qualities of some wood species used ın the furniture industry 计算机数控激光加工某些木材品种的质量研究ın家具工业

IF 1.5 4区农林科学

Maderas-ciencia Y Tecnologia Pub Date : 2023-05-01 DOI: 10.4067/s0718-221x2023000100433

C. Açık

{"title":"Research of computerized numerical control laser processing qualities of some wood species used ın the furniture industry","authors":"C. Açık","doi":"10.4067/s0718-221x2023000100433","DOIUrl":"https://doi.org/10.4067/s0718-221x2023000100433","url":null,"abstract":"In recent years, laser material processing technology has become quite widespread. The quality of laser processing of wood materials is very important in terms of not causing secondary processes in the production process. In this study, computerized numerical control laser cutting qualities of some wood species that are frequently used in industrial product manufacturing were investigated. In the study, 80 % irradiation and 10 mm/ sec laser cutting speed were applied to the test samples in a computerized numerical control laser machine with a 130 W carbon dioxide gas cylinder. In the case of laser cutting of 5 different wood species in the direction vertical to and parallel to the fibers, the average of the upper and lower kerf width, the difference in the width of the upper and lower kerf, the average of the width of the heat-affected zone, the width of the heat-affected zone were evaluated. In line with the findings, the effects of wood species differences on laser cutting quality in terms of material consumption, precision machining, and smoothness of cutting geometry were investigated. As a result, the highest quality cutting values were obtained from the laser cutting of the bamboo massif in terms of wood species, in the direction vertical to the fibers of the wood materials.","PeriodicalId":18092,"journal":{"name":"Maderas-ciencia Y Tecnologia","volume":"24 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78094858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Determination of processing characteristics of wood materials densified by compressing 压缩致密木质材料加工特性的测定

IF 1.5 4区农林科学

Maderas-ciencia Y Tecnologia Pub Date : 2023-04-01 DOI: 10.4067/s0718-221x2023000100427

Mustafa Tosun, S. Sofuoglu

{"title":"Determination of processing characteristics of wood materials densified by compressing","authors":"Mustafa Tosun, S. Sofuoglu","doi":"10.4067/s0718-221x2023000100427","DOIUrl":"https://doi.org/10.4067/s0718-221x2023000100427","url":null,"abstract":"The main objective of this study is to determine optimum cutting parameters in order to specify the effect of densification by compressing on the processing properties of solid wood material and to achieve the best surface quality in materials densified at different rates. In line with this goal, the widely grown and low-density black poplar ( Populus nigra ) tree species were selected as the experimental material. Samples, which were compressed and densified by Thermo-Mechanical method at 0 %, 20 % and 40 % ratios, were processed at 1000 mm/min, 1500 mm/min and 2000 mm/min feed speeds and in 12000 rpm, 15000 rpm, 18000 rpm rotation speed on a computer numerical control machine by using two different cutters. Surface roughness values ( Ra and Rz ) were measured in order to evaluate surfaces obtained. Smoother surfaces were obtained in computer numerical control machining of densified samples. The lowest surface roughness values occurred in 40 % densified samples, which were the densest. The lowest surface roughness was obtained when 40 % densified samples were processed with cutter no.1 (two-flutes straight end mill), at 1000 mm/min feed speed and at 18000 rpm. Ra and Rz roughness values increased with the increase of the feed rate.","PeriodicalId":18092,"journal":{"name":"Maderas-ciencia Y Tecnologia","volume":"32 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78246858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Artificial intelligence to growth stresses predicting in Eucalyptus clones using dendrometric variables and wood density 人工智能在桉树无性系生长应力预测中的应用

IF 1.5 4区农林科学

Maderas-ciencia Y Tecnologia Pub Date : 2023-04-01 DOI: 10.4067/s0718-221x2023000100430

T. Monteiro, Carlos Alberto Araújo, Jean Henrique dos Santos, Thiago Cardoso Silva, T. D. Nascimento, J. Conti, J. L. Matos, R. J. Klitzke, M. Pereira da Rocha

引用次数: 0

Comparing the structure of spruce wood biodegraded by Trametes versicolor and Gloeophyllum trabeum and further utilization of this material 比较了紫曲霉和红球霉生物降解云杉木材的结构及其进一步利用

IF 1.5 4区农林科学

Maderas-ciencia Y Tecnologia Pub Date : 2023-04-01 DOI: 10.4067/s0718-221x2023000100419

O. Mišíková, Barbora Slováčková

{"title":"Comparing the structure of spruce wood biodegraded by Trametes versicolor and Gloeophyllum trabeum and further utilization of this material","authors":"O. Mišíková, Barbora Slováčková","doi":"10.4067/s0718-221x2023000100419","DOIUrl":"https://doi.org/10.4067/s0718-221x2023000100419","url":null,"abstract":"Development of new materials puts a great emphasis on saving production costs, energy, decreasing the amount and number of chemicals used during the manufacturing process. Bio-based materials can be ecologically produced and recycled after their lifespan, which saves the environment. The recent interest in bio-based materials led to the objective of this work. In this article, the structure of spruce wood ( Picea abies ) biodegraded by the white-rot fungus Trametes versicolor and brown-rot fungus Gloeophyllum trabeum was studied. Structure of the wood was observed macroscopically and microscopically. Classic and unusual stain combinations were used in this work. Ethanol was intentionally omitted in the process of making permanent mounts. It was done to preserve the coherence of the decayed microsections and to keep small fragments from being rinsed away. Results of the observations suggest that spruce wood decayed by these fungi could be used as an insulation material. Wood decaying fungi decrease the density of wood and increase its porosity. A low density and high porosity are important properties for insulation materials. According to the results, spruce wood decayed by Trametes versicolor would be more suitable to be used as an insulating material.","PeriodicalId":18092,"journal":{"name":"Maderas-ciencia Y Tecnologia","volume":"65 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83952993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Antique wood preparation by inorganic salts treatment and its performance 古色古香木材的无机盐处理及其性能研究

IF 1.5 4区农林科学

Maderas-ciencia Y Tecnologia Pub Date : 2023-04-01 DOI: 10.4067/s0718-221x2023000100423

M. Sun, Chen Zhao, Youming Yu

引用次数: 0