Maderas. Ciencia y Tecnologia

Shear strength and hardness of two tropical wood species as function of heat treatment

Published in Maderas Ciencia y tecnología

Properties of gypsum particleboard with added mineral dolomite

Published in Maderas Ciencia y tecnología

The effects of bioincising by Physisporinus vitreus on cuo retention and copper element leaching in oriental spruce wood...

Published in Maderas Ciencia y tecnología

Evolución del color y de la aparición de defectos en la madera de Eucalyptus globulus expuesta a intemperismo natural

Published in Maderas Ciencia y tecnología

Lumber drying of Pinus: Geostatistics applied to drying kilns

Published in Maderas Ciencia y tecnología

COMBINING ARTIFICIAL NEURAL NETWORK AND MOTH-FLAME OPTIMIZATION ALGORITHM FOR OPTIMIZATION OF ULTRASOUND-ASSISTED AND MI...

Published in Maderas Ciencia y tecnología

In this study, the extraction parameters of Pinus brutia bark were optimized using a hybrid artificial intelligence technique. Firstly, the bark samples were extracted by ultrasound-assisted extraction and microwave-assisted extraction which are defined as ‘green’ extraction methods at different conditions. The selected extraction parameters for ul...

EXTRACTIVES IN THERMALLY MODIFIED TROPICAL HARDWOODS

Published in Maderas Ciencia y tecnología

Chemical composition of wood is known to change during thermal treatments. Two species grown in Turkey, afrormosia (Pericopsis elata) and duka (Tapirira guianensis) were heat treated according to Thermowood® method. Lignin, cellulose, hemicelluloses and extractives in dichloromethane, ethanol and water were determined. Wood extracts were analysed b...

Mechanical and fire properties of oriental beech impregnated with fire-retardants and coated with polyurea/polyurethane ...

Published in Maderas Ciencia y tecnología

APPLICATION OF A STRAIN GAUGE TO ASSESS DRYING STRESSES IN NORMAL AND TENSION WOOD OF CORYMBIA CITRIODORA

Published in Maderas Ciencia y tecnología

The quantitative evaluation of longitudinal drying strain can provide relevant information for the processing wood and lumber industry, especially with regard to reaction wood in Corymbia, since little has been published. The objective of this work was to evaluate the effect of the steam conditioning and the cooling on the longitudinal drying strai...

EVALUATION AND COMPARISON OF CONTROL AND HEAT TREATED L-SHAPE FURNITURE JOINTS PRODUCED FROM SCOTCH PINE AND ASH WOOD UN...

Published in Maderas Ciencia y tecnología

This study investigated how the mechanical properties of L-shape joints produced from heat treated Scotch pine or ash wood behaved under cyclic fatigue loading and compared this with the mechanical properties of non-heat treated wood materials. Additionally, static bending performances of the L-shape of joints were investigated and compared to fati...

INFLUENCE OF GROWTH PARAMETERS ON WOOD DENSITY OF ACACIA AURICULIFORMIS

Published in Maderas Ciencia y tecnología

Understanding the drivers of wood density variation both within a tree and between trees is important in predicting the quality of wood logs and improving this quality through adequate forestry management. This study examined the effect of the diameter growth of Acacia auriculiformis on its wood density variation. The study was conducted in the Sou...

EFFECT OF THE THERMAL TREATMENT ON THE CHEMICAL COMPONENTS, SORPTION, AND SHRINKAGE PROPERTIES OF TECTONA GRANDIS JUVENI...

Published in Maderas Ciencia y tecnología

The effect of thermal treatment on the chemical components, equilibrium moisture content (EMC), and shrinkage of teak juvenile wood was studied. Heartwood and sapwood samples were thermally-treated at 180 º C and 200 º C. Extractive, Klason lignin, holocellulose, and α-cellulose contents, as well as pH on untreated and thermally-treated woods, were...

COMPARATIVE STUDY ON WEATHERING DURABILITY PROPERTY OF PHENOL FORMALDEHYDE RESIN MODIFIED SWEETGUM AND SOUTHERN PINE SPE...

Published in Maderas Ciencia y tecnología

The effects of low molecular weight phenol formaldehyde resin on weathering durability property of sweetgum (Liquidambar styraciflua) and southern pine (Pinus taeda) specimens were studied using six wetdry cycles with ultraviolet light accelerated weathering test following ASTM via evaluating the water repellent efficiency, dimensional stability, a...

APPLYING COLORIMETRY FOR WOOD DIFFERENTIATION OF FABACEAE SPECIES GROWN IN SOUTHERN BRAZIL

Published in Maderas Ciencia y tecnología

Because of the need for identification of forest species, especially for detection of illegal wood trade, the objective of this study was to evaluate the potential of colorimetry for differentiation of Inga vera Willd., Muellera campestris (Mart. ex Benth.) M.J. Silva & A.M.G. Azevedo and Machaerium paraguariense Hassl., species of the Fabaceae fam...

EFFECTIVENESS OF EUROPEAN OAK WOOD STAINING WITH IRON (II) SULPHATE DURING NATURAL WEATHERING

Published in Maderas Ciencia y tecnología

Artificial graying of wood can be solution for contemporary trends of using uncoated wood for the arrangement of external architecture. The presented work was aimed at investigation of colour changes of European oak (Quercus sp.) wood surface treated with iron (II) sulphate. Three different procedures differing in time (2 h and 24 h) and temperatur...

Mechanical, Thermal, and Morphological behaviour studies on coconut shell and palm kernel filler biocomposite

Published in Maderas Ciencia y tecnología

In the present work, the composite materials were prepared from coconut shell powder, palm kernel powder, and epoxy resin. The addition of coconut shell powder was considered when preparing the composite samples, and mechanical properties such as tensile strength, hardness, impact, bending strength, physical behavior water absorption, as well as mo...

Particle image velocimetry technique and ultrasound method to obtain the modulus of elasticity of bertholletia excelsa w...

Published in Maderas Ciencia y tecnología

Non-destructive techniques for characterizing materials in-service have been increasing in importance. Thus, it is relevant to assess the potential of non-destructive techniques for solid materials. This work aimed to determine the modulus of elasticity of Bertholletia excelsa wood using the particle image velocimetry technique and the ultrasound m...

PREPARATION OF PLYWOOD PANELS USING WASTE MILK POUCHES AS AN ADHESIVE

Published in Maderas Ciencia y tecnología

Recycling of single use plastic like milk pouches, oil pouches, etc. for high value products can have significant environmental, social and economic implications. The present study focuses on the utilization of waste milk pouches made out of low-density polyethylene as the bonding agent in preparation of plywood panels. Plywood panels with varying ...

ENVIRONMENTAL IMPACT ASSESSMENT OF TIMBER HOUSES: “LA CASA URUGUAYA” CASE STUDY

Published in Maderas Ciencia y tecnología

Several actions have been taken in Uruguay to reduce CO2 atmospheric emissions, including modification of the energy matrix. In recent years more than 90% of electricity was produced by renewable sources, such as wind power, hydro (run-of-river) or biomass. Despite this fact, the building, construction, and transport sectors are still great respons...

AN EVALUATION OF CLOVE (Eugenia caryophyllata) ESSENTIAL OIL AS A POTENTIAL ALTERNATIVE ANTIFUNGAL WOOD PROTECTION SYSTE...

Published in Maderas Ciencia y tecnología

This paper investigates the potential of clove (Eugenia caryophyllata) essential oil (C-EO) as a wood protection system for use in cultural heritage conservation. The preventive and curative antifungal efficacy of C-EO was compared to a boron containing wood preservative (Diffusit S) in two laboratory tests on European beech (Fagus sylvatica) and S...