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Journal articles on the topic 'Larch wood'

Author: Grafiati

Published: 4 June 2025

Last updated: 15 July 2025

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1

Yan, Wenxian. "Research on Tensile Properties and Damage Mechanism of Larix Wood Along Grain." International Journal of Materials Science and Technology Studies 2, no. 1 (2024): 38–45. http://dx.doi.org/10.62051/ijmsts.v2n1.07.

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In order to explore the tensile properties and damage mechanism of larch wood along grain, Northeast Larch was taken as the research object. The deformation characteristics, failure mode and stress-strain curve properties of larch wood under tension along grain direction were analyzed by monotonic tensile test on 12 specimens. By means of scanning electron microscopy, the damage and fracture characteristics of wood fiber were analyzed from the microscopic point of view, and the mono-stress failure mechanism of wood was further revealed. The results show that the body of larch wood can be divid

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2

HŘEBENÁŘOVÁ, ELIŠKA, and FRANTIŠEK WALD. "COMPARISON OF MECHANICAL PROPERTIES OF THE ELDEST LARCH WOOD CONSTRUCTION WITH OAK WOOD AND SPRUCE WOOD." WOOD RESEARCH 67(4) 2022 67, no. 4 (2022): 612–24. http://dx.doi.org/10.37763/wr.1336-4561/67.4.612624.

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The paper discusses mechanical properties of timber for structures –most frequently used spruce wood, historically used oak wood and rarely mentioned larch wood. The main focus is on larch wood extracted from the ceilingof an immovablecultural monument from the 17thcentury –the determination of its age, its historicalimportance and mechanical properties. Mechanical properties were obtained by the standard tests in compressionparallel and perpendicular to the fibres and in bending. The results of tests are compared to the mechanical properties of oak wood, of commonly used spruce wood and of re

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3

Liu, Mingli, Chunfeng Li, and Qingwen Wang. "Microstructural characteristics of larch wood treated by high-intensity microwave." BioResources 14, no. 1 (2018): 1174–84. http://dx.doi.org/10.15376/biores.14.1.1174-1184.

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High-intensity microwave radiation was applied to treat and modify larch wood. Using scanning electron microscopy, changes in the microstructure of larch wood due to microwave irradiation were analyzed. After the microwave treatment, the microstructure of the larch wood was varied in its weakest section. The changes of the microstructure, in the pits of the tracheid wall, the plane of the tracheid wall, and the wood ray tissue of the radial section, were notable. The cracks were located among the latewood tracheid, and some of them were throughout the wood ray section, so wood rays were broken

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4

Ohmura, Wakako, Shuichi Doi, Masakazu Aoyama, and Seiji Ohara. "Components of Steamed and Non-Steamed Japanese Larch (Larix leptolepis (Sieb. et Zucc.) Gord.) Heartwood Affecting the Feeding Behavior of the Subterranean Termite, Coptotermes formosanus Shiraki (Isoptera: Rhinotermitidae)." Holzforschung 53, no. 6 (1999): 569–74. http://dx.doi.org/10.1515/hf.1999.094.

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Summary The attraction of steamed Japanese larch (Larix leptolepis (Sieb. et Zucc.) Gord.) heartwood to the subterranean termite, Coptotermes formosanus Shiraki was investigated. Hot-water extracts of the steamed and the non-steamed larch woods were sequentially extracted with n-hexane, diethyl ether, and ethyl acetate. Furthermore, the residual water-soluble fraction of the steamed wood was fractionated by column chromatography using an Amberlite XAD-2 resin. Feeding-preference and feeding-deterrence of the termite were assessed in the two-choice feeding tests using paper discs permeated with

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5

Kim, Seong Hyun, Do Hoon Kim, Jae Ik Jo, et al. "A COMPARATIVE STUDY ON THE PHYSICAL AND MECHANICAL PROPERTIES OF DAHURIAN LARCH AND JAPANESE LARCH GROWN IN KOREA." WOOD RESEARCH 66(3) 2021 66, no. 3 (2021): 415–26. http://dx.doi.org/10.37763/wr.1336-4561/66.3.415426.

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To compare the wood quality of Dahurian larch and Japanese larch growing in Korea, the physical and mechanical properties were examined using the Korean standards. The proportion of heartwood was 82% and 72% in Dahurian and Japanese larch, respectively. The percentage of latewood was 42% in Dahurian larch and 35% in Japanese larch. The growth ring width of Dahurian larch was narrower than that of Japanese larch. Dahurian larch showed about 20% higher green moisture content compare to Japanese larch wood. Density and shrinkage of Dahurian larch were higher than Japanese larch. Axial compression

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6

Fowler, D. P., J. D. Simpson, Y. S. Park, and M. H. Schneider. "Yield and Wood Properties of 25-year-old Japanese Larch of Different Provenance in Eastern Canada." Forestry Chronicle 64, no. 6 (1988): 475–79. http://dx.doi.org/10.5558/tfc64475-6.

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Yield data from a 25-year-old trial of Japanese larch (20 provenances), European larch (3 provenances) and tamarack (2 provenances) are presented. Japanese larch is genetically variable in volume of wood produced at age 25 years. The pattern of variation is not closely related to any commonly measured geographic or environmental variables.Japanese larch, managed over short rotations, is capable of producing two to three times more wood than other conifer species commonly planted in the Maritimes Region of Canada. The mean annual increment of merchantable wood for trees of the three best proven

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7

Gašparík, Miroslav, Elham Karami, Fatemeh Rezaei, Tomáš Kytka, Sumanta Das, and Doubravka Lesáková. "The Influence of Alternating Lower and Higher Temperatures on the Bending Characteristics of Glued Norway Spruce (Picea abies (L.) H. Karst.) and European Larch (Larix decidua Mill.) Wood." Forests 13, no. 3 (2022): 364. http://dx.doi.org/10.3390/f13030364.

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This article deals with the effect of alternating lower (freezing) and higher (heating) temperatures on the static bending characteristics of glued Norway spruce (Picea abies (L.) H. Karst.) and European larch (Larix decidua Mill.) wood. Two types of wood, PUR (polyurethane), and EPI (emulsion polymer isocyanate), were used for the experiment. The thermal loading of glued wood was carried out at temperatures −15 °C/70 °C and −25 °C/70 °C. Static bending characteristics were determined on glued wood samples and compared with the reference samples. Freezing causes an increase in the bending prop

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8

Wei, Xiwen, Shuzheng Xu, Liping Sun, Cong Tian, and Chunxiao Du. "Propagation velocity model and two-dimensional defect imaging of stress wave in larch (Larix gmelinii) wood." BioResources 16, no. 4 (2021): 6799–813. http://dx.doi.org/10.15376/biores.16.4.6799-6813.

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The propagation law of stress wave in larch (Larix gmelinii) wood was studied in this work. External factors affecting the propagation velocity of stress wave in wood cross-section were studied using the orthogonal experiment method. The most influential factors were shown by the experimental results, and the parameters of the propagation velocity model of stress wave in larch wood were optimized. Based on the optimized propagation velocity model, combined with the traditional defect determination method, a twelve-directional stack imaging (TDSI) steps system was developed for larch wood inter

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9

HÖRHAMMER, HANNA, OKSANA BEREZINA, EERO HILTUNEN, TOM GRANSTRÖM, and ADRIAAN VAN HEININGEN. "Semi-bleached paper and fermentation products from a larch biorefinery." October 2012 11, no. 10 (2012): 31–39. http://dx.doi.org/10.32964/tj11.10.31.

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This study was focused on the products from a larch biorefinery, specifically bleached paper and different fermentation products. Siberian larch (Larix sibirica Lebed.) wood chips were treated with water in a pre-extraction (PE) stage. The larch extract was removed by drainage and fermented into different products. Eight different bacteria strains were tested. The extracted wood chips were mildly washed before kraft pulping with polysulfide (PS) and anthraquinone (AQ). The PE-PSAQ pulps were bleached to about 80% brightness. Laboratory paper sheets were made and tested for different paper prop

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10

Yang, Myung Sun, Yeonjung Han, and Dong Won Son. "Effect of using laser incising treatment and fire-retardant coating on Larix kaempferi wood to improve fire retardant performance." BioResources 17, no. 4 (2022): 6860–74. http://dx.doi.org/10.15376/biores.17.4.6860-6874.

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To improve fire-retardant performance of Japanese larch (Larix kaempferi) wood, this study analyzed the effect of pinholes made by laser incising and fire retardant (FR) coating on the surface of Japanese larch wood. Combustion properties such as peak heat release rate (PHRR) and total heat release (THR) of Japanese larch and Korean red pine (Pinus densiflora) wood without FRs showed similar tendencies. The comparison of the combustion properties on wood injected with an inorganic water-soluble FR under vacuum revealed that the PHRR and the THR of Korean red pine wood decreased by 37 and 62%,

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11

Zhou, Hai Bin, Chuan Shuang Hu, and Jian Hui Zhou. "Thermal Degradation of Bending Properties of Structural Larch Wood." Advanced Materials Research 557-559 (July 2012): 1563–66. http://dx.doi.org/10.4028/www.scientific.net/amr.557-559.1563.

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Wood is being used extensively in timber construction in China. It is important to understand its response when exposed to elevated temperatures. In fire-resistant design for timber construction, the main goal is to ensure that enough structural integrity is maintained during a fire to prevent structure collapse. To study the effect of temperature on bending strength (MOR) and stiffness (MOE) of solid clear wood from Chinese larch, a total of 108 samples with various target temperatures were tested in static bending under same temperatures to ensure the wood temperature to be sustained. The re

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12

Kazymov, Dmitriy Sergeyevich, Lyudmila Gertsevna Makhotina, Андрей Борисович Nikandrov, Anton Gennad'yevich Kuznetsov, and Эдуард Львович Akim. "FEATURES OF LARIX SIBIRICA LEDEB WOOD PROCESSING INTO HIGH YIELD FIBROUS SEMI-FINISHED PRODUCTS." chemistry of plant raw material, no. 1 (March 16, 2021): 317–25. http://dx.doi.org/10.14258/jcprm.2021018472.

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About 40 % of the forest area in the Russian Federation is occupied by larch trees growing in the southern regions of Eastern Siberia and the Far East, where existing and reconstructed woodworking enterprises are located. In this regard, the use of larch wood in the production of fibrous semi-finished products is an urgent task for the Russian forest complex. As is known, larch wood contains a large number of extractive substances that have a significant impact on the process of its deep chemical processing. Therefore, it can be assumed that the production of wood (mechanical) pulp from larch

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13

Bakir, Davut. "Anatomical structure and copper microdistribution in mechanical, biological, and laser incised spruce and larch refractory woods." BioResources 18, no. 1 (2023): 1368–83. http://dx.doi.org/10.15376/biores.18.1.1368-1383.

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The anatomical structure of wood and the application of three different incision pretreatments affect the distribution of preservatives in refractory woods. This study focused on Picea orientalis (L.) Peterm.) and Larix decidua Mill. and investigated the distribution of copper-based preservatives in the wood microstructure. Different incision pretreatments were applied before impregnation to increase the permeability of spruce and larch sapwood samples. After the incision pretreatments, transverse cross-sectional surfaces of the samples were sealed with polyurethane-based paint to prevent exce

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14

Levdansky, Vladimir Aleksandrovich, Aleksandr Vladimirovich Levdansky, and Boris Nikolayevich Kuznetsov. "ISOLATION OF DIHYDROQUERCETIN AND ARABINOGALACTAN FROM LARCH WOOD WITH WATER-ETHANOL SOLUTIONS." chemistry of plant raw material, no. 4 (December 15, 2022): 107–13. http://dx.doi.org/10.14258/jcprm.20220411959.

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Siberian larch wood (Larix sibirica Lebed.) contains such valuable biologically active substances as dihydroquercetin (DHQ) and arabinogalactan (AG), promising for the use in the pharmaceutical and food industries. An urgent task is to improve the methods of extraction isolation of these compounds from wood. In this work, we studied the possibility of simultaneous isolation of dihydroquercetin and arabinogalactan by extraction of larch wood with 5–25% aqueous ethanol solutions. It has been shown that by extracting wood with aqueous solutions with a low concentration of ethanol, it is possible

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15

Chui, Y. H., and Glenda MacKinnon-Peters. "Wood properties of exotic larch grown in eastern Canada and north-eastern United States." Forestry Chronicle 71, no. 5 (1995): 639–46. http://dx.doi.org/10.5558/tfc71639-5.

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The rapid growth performance of exotic larch such as Japanese larch (Larix leptolepis (Sieb. et Zucc) Gord.) and European larch (Larix decidua Mill.) has attracted the attention of the forestry sector in eastern Canada and north-eastern United States for lumber and pulp production. While growth performance of these species in North America has been well documented, little is known with regards to their wood properties. The objective of this study was to evaluate the primary lumber grade yields, mechanical properties, fiber length, specific gravity and cold-water soluble extractives of larch fr

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16

Shamaev, Vladimir, Alexander Tyurin, Alexander Russu, Oksana Garkusha, and Vyacheslav Rodaev. "Obtaining environmentally compliant wood-polymer composite material from larch wood." E3S Web of Conferences 623 (2025): 01021. https://doi.org/10.1051/e3sconf/202562301021.

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The article discusses the issues of environmentally compatible strengthening components of wood-polymer composite materials: a binder and a wood matrix (Larix Sibirica). Nanocrystalline cellulose was activated by ultrasound and a pulsed magnetic field. Then it was introduced into synthetic polymer liquid phenol-formaldehyde resin. It increased the resin strength by 2 times. Similar results were obtained with Prefier phenol-formaldehyde resin, urea formaldehyde resin with increased pot life, and amino-formaldehyde resin. The analysis of larch wood microstructure obtained with a scanning electro

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17

Wu, Yan, Haiqiao Zhang, Yang Zhang, et al. "Effects of thermal treatment on the mechanical properties of larch (Larix gmelinii) and red oak (Quercus rubra) wood cell walls via nanoindentation." BioResources 14, no. 4 (2019): 8048–57. http://dx.doi.org/10.15376/biores.14.4.8048-8057.

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Thermally treated wood is widely used for construction, furniture, and flooring because it has better dimensional stability in outdoor conditions. There is a close relationship between the mechanical properties of thermally treated wood cell walls and the performance of its products. The hardness (H) and reduced elastic modulus (Er) of larch (Larix gmelinii) and red oak (Quercus rubra) wood cell walls were investigated via nanoindentation. The results showed that the larch and red oak wood specimens had different nanomechanical properties. The Er in the larch wood initially increased with a ma

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18

Kim, Do Hoon, Jong Ho Kim, Byantara Darsan Purusatama, et al. "A comparative study of the tracheid and crystalline properties of Dahurian larch (Larix gmelinii) and Japanese larch (Larix kaempferi) wood." BioResources 17, no. 2 (2022): 2768–79. http://dx.doi.org/10.15376/biores.17.2.2768-2779.

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The tracheid and crystalline properties of earlywood and latewood within the stems of Korean-grown Dahurian and Japanese larches were studied to obtain valuable information for identifying these two species and determining their wood quality. The tracheid length and width were examined via optical microscopy, and the relative crystallinity and crystallite widths were examined using the X-ray diffraction method. The tracheid length and width were greater in the Dahurian larch compared to the Japanese larch. In both wood species, the tracheid length and width increased as the growth ring number

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19

Štěrbová, Irena, Eliška Oberhofnerová, Miloš Pánek, Ondřej Dvořák, and Miloš Pavelek. "Influence of different exposition of larch wood facade models on their surface degradation processes." Central European Forestry Journal 67, no. 1 (2021): 45–53. http://dx.doi.org/10.2478/forj-2020-0023.

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Abstract Wood, as a building material, is nowadays more often used outdoors. From the point of view of environment care, wood constructions and use of renewable materials belongs between modern increasing trends in industry. Wooden facades, more often used without surface treatment, are the important part of this trend. In Central Europe, European larch (Larix decidua) and Siberian larch (Larix sibirica) are especially popular materials for wooden facade elements. The aim of this study is to characterize the surface degradation of untreated facade models from both European and Siberian larch w

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20

Kšištof, Godvod, Brazaitis Gediminas, Bačkaitis Julius, and Kulbokas Gintaras. "The development and growth of larch stands in Lithuania." Journal of Forest Science 64, No. 5 (2018): 199–206. http://dx.doi.org/10.17221/6/2018-jfs.

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Changing climate conditions and increasing demands for timber and wood products create a need to cultivate highly productive forest stands. High productivity, good wood quality and adaption to climate change make European larch a promising species for Lithuania. The aim of this research was to evaluate the productivity and sustainability of the larch stands. We tested the hypothesis that larch stands mixed with other species are more productive than the pure larch stands. In total, our study sampled 138 larch stands, mixed stands (91) and pure stands (47) that aged between 30 and 60 years old

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Oberhofnerová, Eliška, Miloš Pánek, Milan Podlena, Miloš Pavelek, and Irena Štěrbová. "Color Stabilization of Siberian and European Larch Wood Using UVA, HALS, and Nanoparticle Pretreatments." Forests 10, no. 1 (2019): 23. http://dx.doi.org/10.3390/f10010023.

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Reducing discoloration of wood due to photodegradation caused by ultraviolet (UV) and visible (VIS) radiation enhances its aesthetical value and prolongs the overall service life of protective coatings. In this study, the efficiency of pretreatments with different active ingredients to reduce degradation and stabilize the color of Siberian (Larix sibirica Ledeb.) and European larch (Larix decidua Mill) wood was investigated. UV absorbers (UVA), hindered amine light stabilizers (HALS) and zinc oxide nanoparticles were used in twenty different pretreatments. The ability to protect wood surface a

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Nikolay A, Neverov, Belyaev Vladimir V, Chistova Zinaida B, et al. "Effects of geo-ecological conditions on larch wood variations in the North European part of Russia (Arkhangelsk region)." Journal of Forest Science 63, No. 4 (2017): 192–97. http://dx.doi.org/10.17221/102/2015-jfs.

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The present study examines the macrostructure and density of larch wood and possible influences on the productivity of larch stands. The studies were conducted in the middle and sub-tundra taiga in the Arkhangelsk region. The selected trees were of the same age and diameter at breast height. In all sample plots the average annual ring width varied from 0.68 to 0.93 mm, the average content of latewood was about 29.7–35.1% and the average wood density of these old Siberian larch trees was 572 (500–698) kg·m<sup>–3</sup>. There were no significant differences between sample plots in t

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23

Rybakova, Natal'ya, and Yuriy Glazunov. "THE INFLUENCE OF MOTOR TRANSPORT POLLUTION ON THE GROWTH OF EUROPEAN LARCH." Forestry Engineering Journal 10, no. 2 (2020): 70–80. http://dx.doi.org/10.34220/issn.2222-7962/2020.2/7.

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The results of an 18-year monitoring of the growth of European larch (Larixdecidua Mill.) in the zone of influence of the Moscow Ring Road (MKAD), one of the largest highways in the European part of Russia with a load of about 9 thousand cars per hour, are presented. The studies have been carried out on three trial plots located at 15, 35 and 100 m (control) from the highway. The morphometric parameters of European larch were determined 4, 8 and 18 years after planting four-year-old seedlings. Significant inhibition of European larch growth near the MKAD was revealed by height, trunk diameter,

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Jang, Eun-Suk, Xiao Jia Kang, Seok-Un Jo, and Hee-Jun Park. "Preliminary investigation on the vacuum pressure impregnation performance of flame retardant for larch (Larix kaempferi) depending on grooving type." BioResources 19, no. 4 (2024): 9606–15. http://dx.doi.org/10.15376/biores.19.4.9606-9615.

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Due to wood’s susceptibility to fire, it is crucial to treat wood-based materials with flame retardants, especially in construction applications. This study investigated the effectiveness of various grooving types, including transverse, longitudinal, both transverse and longitudinal, and surface grooving, in enhancing the vacuum pressure impregnation of larch wood. The results revealed that transverse grooving provided a slightly greater impregnation advantage than longitudinal grooving. Moreover, exceptional impregnation performance was observed in larch samples subjected to threefold longitu

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Wagner, Kerstin, Maurizio Musso, Stefan Kain, Stefan Willför, Alexander Petutschnigg, and Thomas Schnabel. "Larch Wood Residues Valorization through Extraction and Utilization of High Value-Added Products." Polymers 12, no. 2 (2020): 359. http://dx.doi.org/10.3390/polym12020359.

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Many of current bio-based materials are not fully or partly used for material utilization, as the composition of their raw materials and/or possible applications are unknown. This study deals with the analysis of the wood extractives from three different tissue of larch wood: Sapwood mainly from outer part of the log, and sound knotwood as well as dead knotwood. The extractions were performed with an accelerated solvent extractor (ASE) using hexane and acetone/water. The obtained extracts were analyzed by gas chromatography coupled to mass spectrometry (GC-MS). Three various vibrational spectr

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Zhang, Fenghao, Sidong Wang, Jinghui Jiang, Dongsheng Chen, and Haibin Zhou. "Effects of Growth Ring Width, Height from Tree Base, and Loading Direction on Transverse Compression of Plantation Japanese Larch Wood." Forests 14, no. 7 (2023): 1451. http://dx.doi.org/10.3390/f14071451.

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This study aimed to investigate the effects of growth ring width, height from the tree base, and loading direction on the transverse compressive strength of Japanese larch wood, which is commonly used in wood structures in China. Plantation wood is often used to replace natural forest woods for reconstruction purposes, despite significant differences in properties (e.g., growth rings, density, strength) between them. The ends of transversely compressed wood members in such structures are prone to damage by breaking or crushing. A transverse compressive test was conducted following Chinese nati

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Sykacek, Eva, Notburga Gierlinger, Rupert Wimmer, and Manfred Schwanninger. "Prediction of natural durability of commercial available European and Siberian larch by near-infrared spectroscopy." Holzforschung 60, no. 6 (2006): 643–47. http://dx.doi.org/10.1515/hf.2006.108.

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Abstract The natural durability of larch wood is described as being highly variable, ranging from non-durable to durable. In this study, FT-NIR spectroscopy was investigated for its ability to predict the natural durability of commercially available larch wood. Samples originated from approximately 60 European and 25 Siberian larch trees, provided by three Austrian-based wood industries. Natural durability tests were performed using the test fungi Gloeophyllum trabeum and Coniophora puteana. FT-NIR spectra were recorded and average spectra were calculated for calibration modelling. The models

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Zhou, Qiaofang, Yingchun Cai, Yan Xu, and Xiangling Zhang. "Determination of moisture diffusion coefficient of larch board with finite difference method." BioResources 6, no. 2 (2011): 1196–203. http://dx.doi.org/10.15376/biores.6.2.1196-1203.

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This paper deals with the moisture diffusion coefficient of Dahurian Larch (Larix gmelinii Rupr.) by use of the Finite Difference Method (FDM). To obtain moisture distributions the dimensional boards of Dahurian Larch were dried, from which test samples were cut and sliced evenly into 9 pieces in different drying periods, so that moisture distributions at different locations and times across the thickness of Dahurian Larch were obtained with a weighing method. With these experimental data, FDM was used to solve Fick’s one-dimensional unsteady-state diffusion equation, and the moisture diffusio

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Nociar, Marek, Tomáš Pipíška, Pavel Král, Samo Grbec, and Milan Šernek. "Effect of the percentage of MUF adhesive coverage on shear strength when bonding different wood species." BioResources 19, no. 3 (2024): 5672–84. http://dx.doi.org/10.15376/biores.19.3.5672-5684.

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Due to climate changes, it is necessary to consider the use of other wood species to replace currently used woods. This work deals with the determination of the shear strength of bonded veneers (eight European wood species: spruce, larch, pine, beech, oak, poplar, birch, and alder) with Silekol® 311 melamine-urea-formaldehyde adhesive (MUF) with a variable coverage on the surface of the samples: 10, 15, 20, 25, 30, 50, 75, and 100%. The Automated Bonding Evaluation System (ABES) was used to evaluate and compare adhesive bond strengths. The larch, beech, and oak samples exhibited greater single

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Eliseev, S. G., V. N. Ermolin, and S. S. Stupnikov. "Using microwave irradiation to increase permeability of Siberian larch wood." IOP Conference Series: Materials Science and Engineering 1230, no. 1 (2022): 012005. http://dx.doi.org/10.1088/1757-899x/1230/1/012005.

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Abstract The paper presents the research results of the microwave radiation effect on the Siberian larch heartwood. The collected experimental data show that microwave treatment increases the larch wood permeability not only longitudinal but also transversely the fibres. The most significant increase of the transversely fibre wood permeability is found in the tangential direction.

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Gayda, S. V., та L. E. Lesiv. "ВИЗНАЧЕННЯ ТА ПОРІВНЯННЯ ВЛАСТИВОСТЕЙ ВЖИВАНОЇ ДЕРЕВИНИ ОСНОВНИХ ХВОЙНИХ ПОРІД". Forestry, Forest, Paper and Woodworking Industry 45 (29 грудня 2019): 39–46. http://dx.doi.org/10.36930/42194506.

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The physical-mechanical properties of post-consumer wood (PCW) coniferous wood, namely pine fir, larch, spruce, were investigated. Tabular data of post-consumer wood of individual coniferous species are compiled: larch, pine, spruce and fir. The following physico-mechanical indices of used coniferous wood are investigated: density, impact hardness of fibers, static hardness, static flexural strength, chipping strength along fibers, compressive strength. Nomograms based on the research results have been constructed, which made it possible to efficiently carry out a comparative analysis of indic

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Filion, Louise, and Luc Cournoyer. "Variation in wood structure of eastern larch defoliated by the larch sawfly in subarctic Quebec, Canada." Canadian Journal of Forest Research 25, no. 8 (1995): 1263–68. http://dx.doi.org/10.1139/x95-139.

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We studied the wood structure of eastern larch (Larixlaricina (Du Roi) K. Koch) affected by a larch sawfly (Pristiphoraerichsonii (Htg.)) infestation that occurred in 1939 in the Lac à l'Eau-Claire and Rivière-aux-Mélèzes areas, subarctic Quebec. The objective was to document variation in wood characteristics in relation to defoliation at three study sites. Lumen diameter of tracheids and cell wall thickness were measured from thin sections representing the 1931–1955 period. Significant changes in the wood structure of larch was noticed only at the Atkinson Island site, where the radial growth

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Cheng, Liting, Jian Dai, Zhiguo Yang, et al. "Variation of larch wood property indexes based on nondestructive testing data." BioResources 15, no. 2 (2020): 2906–23. http://dx.doi.org/10.15376/biores.15.2.2906-2923.

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To quickly evaluate the material properties of ancient wooden structure members on site, the larch species of northeastern China was used as the research object, and the nondestructive testing method of the stress wave and the micro-drill resistance meter were used to measure it. The variation laws of the larch wood’s cross and longitudinal property indexes were determined. According to the variation law of material property indexes, the detection divisions under the nondestructive testing technology of stress wave and micro-drill resistance instruments were divided, which provides a basis for

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Pazio, Bartłomiej, and Piotr Boruszewski. "Analysis of the influence of larch fibers and particles on selected properties of fiber- and particleboards." Annals of WULS, Forestry and Wood Technology 111 (September 30, 2020): 43–52. http://dx.doi.org/10.5604/01.3001.0014.6651.

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Analysis of the influence of larch fibers and particles on selected properties of fiber- and particleboards. The paper presents the results of the research on the effect of the addition of fibers and particles obtained from European larch wood (Larix decidua Mill) from plantations on selected properties of fiber- and particleboards in comparison to the boards of the same structure based on typical industrial raw material (pine wood) uses by European wood based panels industry. The differences were shown in the tests, i.e.: modulus of rupture (MOR), modulus of elasticity in static bending (MOE)

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35

Merzlenko, Mikhail D., Petr G. Melnik, and Anna A. Kozhenkova. "Introduction of European Larch Climatypes in the Mixed Forest Zone." Lesnoy Zhurnal (Forestry Journal), no. 5 (October 20, 2022): 37–46. http://dx.doi.org/10.37482/0536-1036-2022-5-37-46.

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The range of European larch (Larix decidua Mill.) covers Central Europe, while in Podmoskovie this species grows out of its natural distribution area. In plantings this species is known for its fast growth, stability, good soil and water protection properties, and high wood quality. All larch species in the Moscow region have a positive reputation in terms of high adaptability, they are often more productive than the local coniferous forest-forming species. Similar results were obtained by foresters in Central and Eastern Europe. The increment in stock in a number of Polish larch populations a

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36

Duan, Shaowei, Wenzhao Zhou, Xinglong Liu, Jian Yuan, and Zhifeng Wang. "Experimental Study on the Bending Behavior of Steel-Wood Composite Beams." Advances in Civil Engineering 2021 (June 26, 2021): 1–12. http://dx.doi.org/10.1155/2021/1315849.

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This paper proposes a steel-wood composite beam with H-shaped steel beam webs glued to the wood. As a new type of composite beam, it combines the advantages of low energy consumption of wood, high permeability, and less pollution and the advantages of light weight and high strength of steel, high degree of assembly, short construction period, and less construction waste generated. Carrying out research is of great significance to improve the mechanical properties of steel-wood composite beams and promote the development of steel-wood composite structures. In this paper, three hot-rolled H-beam

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Kim, Do Hoon, Byantara Darsan Purusatama, and Nam Hun Kim. "Bordered pitting arrangement with age of Dahurian larch (Larix gmelinii) and Japanese larch (Larix kaempferi)." BioResources 19, no. 3 (2024): 5994–6008. http://dx.doi.org/10.15376/biores.19.3.5994-6008.

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The bordered pitting arrangements in the tracheids of Dahurian larch (DL) and Japanese larch (JL) growing in Korea were studied using optical microscopy to gain insights into the wood identification of both species. Differences were noted in the tracheid pitting patterns between the species. In juvenile wood, DL dominantly exhibited uniseriate pitting along the earlywood within a growth ring, whereas JL displayed biseriate pitting at the start of the earlywood, transitioning to uniseriate pitting. In the transition wood, DL predominantly showed biseriate pitting at the beginning, with uniseria

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Schnabel, Thomas, Marius Cătălin Barbu, Eugenia Mariana Tudor, and Alexander Petutschnigg. "Changing in Larch Sapwood Extractives Due to Distinct Ionizing Radiation Sources." Materials 14, no. 7 (2021): 1613. http://dx.doi.org/10.3390/ma14071613.

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Wood extractives have an influence on different material properties. This study deals with the changes in wood extractives of larch sapwood due to two different low doses of energy irradiations. Electron beam irradiation (EBI) and γ-ray irradiation treatments were done by using two industrial processes. After the different modifications the extractions were performed with an accelerated solvent extractor (ASE) using hexane and acetone/water. The qualitative and quantitative chemical differences of irradiated larch sapwood samples were analysed using gas chromatography–mass spectrometry (GC-MS)

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Špilák, Dominik, and Andrea Majlingová. "Progressive Methods in Studying the Charred Layer Parameters Change in Relation to Wood Moisture Content." Polymers 14, no. 22 (2022): 4997. http://dx.doi.org/10.3390/polym14224997.

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The aim was to investigate the relationship of charred layer parameters (also wood fire resistance) and moisture content of European larch (Larix decidua L.) wood. For this purpose, finite element model (FEM) was developed. To develop FEM, ANSYS software and transient thermal analysis were applied. To validate developed FEM, the medium-scale fire tests were provided in the laboratory chamber. In the fire tests the beams made of larch wood have undergone the thermal loading with radiant panel. The FEM validation results showed very strong correspondence of numerical and experimental results, wh

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Nikonova, Natalya N., Tatyana V. Hurshkainen, Oksana G. Shevchenko, and Alexander V. Kuchin. "“Green technology” processing of pine (Pinus sylvestris L.) and larch (Larix sibirica Ledeb.) wood greenery to produce bioactive extracts." Holzforschung 76, no. 3 (2021): 276–84. http://dx.doi.org/10.1515/hf-2021-0122.

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Abstract In order to explore the extractives of conifers an effective and environmentally friendly method of extraction with aqueous-alkaline solution allowing to isolate up to 10.4% of extractive substances (ES) from pine wood greenery and up to 6.9% from larch wood greenery was investigated. The component fractional composition of aqueous-alkaline extracts was studied. The antioxidant fraction activity of neutral and acidic components isolated from the produced extracts was evaluated. It was found that these fractions have a high antioxidant activity, where the activity of larch extract comp

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Grabner, Michael, Rupert Wimmer, Notburga Gierlinger, Robert Evans, and Geoff Downes. "Heartwood extractives in larch and effects on X-ray densitometry." Canadian Journal of Forest Research 35, no. 12 (2005): 2781–86. http://dx.doi.org/10.1139/x05-196.

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The genus Larix is exceptional for its high content of extractives in the heartwood, with the dominating component arabinogalactan found abundantly in cell lumens of tracheids. On samples prepared from 100 European larch (Larix decidua Mill.) and hybrid larch (L. decidua × Larix kaempferi (Lamb.) Carr.) trees, extractive contents and wood density were measured using X-ray densitometry. A strong relationship between the amount of hot water extractives and the loss of density owing to the extraction process was found. Prior to extraction, increasing extractive content went hand-in-hand with high

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Zhou, Hai Bin, Chuan Shuang Hu, and Jian Hui Zhou. "The Interaction of Temperature and Bending Load on Structural Performance of Chinese Larch Wood." Key Engineering Materials 531-532 (December 2012): 122–26. http://dx.doi.org/10.4028/www.scientific.net/kem.531-532.122.

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Wood is being used extensively in timber construction in China. In fire-resistant design for timber construction, the main goal is to ensure that enough structural integrity is maintained during a fire to prevent structure collapse. It is important to understand its structural performance when exposed to elevated temperatures and loaded by stress levels. To study the interaction effect of Chinese larch wood, a total of 72 small clear wood samples were observed under constant stress levels when the wood temperature was elevated. The results indicated that Chinese larch wood was more susceptible

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Han, Gyu-Seong, Youn-Il Kim, and Kyoung-Tae Mun. "Briquetting from Japanese larch and Hyunsasi poplar." Journal of the Korean Wood Science and Technology 40, no. 1 (2012): 1–9. http://dx.doi.org/10.5658/wood.2012.40.1.1.

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Lee, In-Hwan, Soo-min Cho, and Soon-Il Hong. "Prediction of The MOR of Larch Lumber." Journal of the Korean Wood Science and Technology 46, no. 1 (2018): 93–99. http://dx.doi.org/10.5658/wood.2018.46.1.93.

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45

Fabisiak, Ewa, Beata Fabisiak, and Andrzej Krauss. "Radial variation in tracheid lengths in dominant trees of selected coniferous species." BioResources 15, no. 4 (2020): 7330–41. http://dx.doi.org/10.15376/biores.15.4.7330-7341.

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The radial variation was examined for tracheid lengths of Norway spruce (Picea abies (L.) Karst.), European larch (Larix decidua Mill.), and Scots pine (Pinus sylvestris L.) wood from dominant trees coming from an even-aged stand, and growing under identical forest site and climatic conditions. The measurements were completed on macerated material. The variation of tracheid lengths in annual rings from the core to the bark was used for determination of the border between the juvenile and mature wood in the trunk cross-section. The boundary age between the juvenile and mature wood zones establi

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46

Polubojarinov, Oleg I., Anatoly N. Chubinsky, and Owe Martinsson. "Decay Resistance of Siberian Larch Wood." AMBIO: A Journal of the Human Environment 29, no. 6 (2000): 352–53. http://dx.doi.org/10.1579/0044-7447-29.6.352.

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47

Sasani, Nadia, Luc E. Pâques, Guillaume Boulanger, et al. "Physiological and anatomical responses to drought stress differ between two larch species and their hybrid." Trees 35, no. 5 (2021): 1467–84. http://dx.doi.org/10.1007/s00468-021-02129-4.

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Abstract Key Message Hybrid saplings were more reactive to soil water deficit than Japanese and European larch. European larch had hydraulically safer wood and anisohydric behavior, Japanese and hybrid larch showed isohydric strategy. Abstract Deciduous larch species could be an alternative to evergreen conifers in reforestation, but little is known about drought sensitivity of their saplings. The effect of an experimental drought on hydraulics and quantitative wood anatomy was tested on saplings of European larch (EL, Larix decidua), Japanese larch (JL, Larix kaempferi) and their hybrid (HL).

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Schuster, Anja, Nina Ortmayr, Gertie Janneke Oostingh, and Bettina Stelzhammer. "Compounds extracted from larch, birch bark, Douglas fir, and alder woods with four different solvents: Effects on five skin-related microbes." BioResources 15, no. 2 (2020): 3368–81. http://dx.doi.org/10.15376/biores.15.2.3368-3381.

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Wood is an important natural resource, and the extracts of specific wood species might have growth-inhibiting effects on certain microbes. This property can be used in the pharmaceutical industry to develop phytochemical-based medicine to treat skin infections. Thus far, methanol, intrinsically toxic, has been the main solvent used for extraction of soluble wood compounds. In this study, the focus was placed on biocompatible solvents, including dimethyl sulfoxide, distilled water, and glycerin, in addition to methanol used to extract compounds from larch, birch bark, Douglas fir, and alder woo

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Gryc, V., H. Vavrčík, and K. Horn. "Density of juvenile and mature wood of selected coniferous species." Journal of Forest Science 57, No. 3 (2011): 123–30. http://dx.doi.org/10.17221/18/2010-jfs.

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The objective of research was to determine the density of juvenile (JW) and mature wood (MW) of selected coniferous species growing in the Czech Republic. The research included the wood of Norway spruce (Picea abies (L.) Karst.), Scots pine (Pinus sylvestris L.) and European larch (Larix decidua Mill.). The juvenile wood density close to the pith was 410 kg&middot;m<sup>&ndash;3</sup> for spruce, 391 kg&middot;m<sup>&ndash;3</sup> for pine and 573 kg&middot;m<sup>&ndash;3</sup> for larch with 12% water content. Mature wood in the peri

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Bakir, Davut. "Effects of different incising pretreatments in improving permeability in two refractory wood species." BioResources 17, no. 3 (2022): 5021–37. http://dx.doi.org/10.15376/biores.17.3.5021-5037.

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For many product and applications, the penetration of preservatives or modification substances into wood species should be deep and homogeneous. Caucasian spruce and European larch are resistant to impregnation. This study compared how different incising pre-processes increased the retention of impregnation materials and the depth of their penetration into the structures of these refractory wood species. Mechanical, biological, and laser incising pretreatments were applied to increase the permeability of sapwood samples before the impregnation. To compare the uptake of the wood preservatives t

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