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Mostrando ítems 1-10 de 21
Optical performance of finished and unfinished tropical timbers exposed to ultraviolet light in the field in Costa Rica
(Wood Material Science & Engineering, 2016)
This study evaluated wood color change (ΔE*) and the surface quality in 10 tropical wood species painted with three
finishes (composed of wax and polyurethane). Two weathering conditions were tested: natural weathering ...
Evaluation of chemical compositions, air-dry, preservation and workability of eight fastgrowing plantation species in Costa Rica
(Revista Madera y Bosques, 2015)
Costa Rica has successfully planted various forestry species for wood production. However, the use of their wood is limited, due to poor
knowledge about their chemical properties, air-dry, preserved and workability ...
Evaluation of wood properties from six native species of forest plantations in Costa Rica
(Bosque, 2016)
This study details information about physical, chemical and mechanical properties, drying, preservation and workability of wood
from Cordia alliodora, Dipteryx panamensis, Enterolobium cyclocarpum, Hieronyma alchorneoides, ...
Physical properties and fiber dimension in Stem, Branch and root of Alder Wood
(Parlar Scientific Publications, 2015-01)
The aim of this study was to determine physical properties and fiber dimensions in stem, branch and root wood for alder (Alnus glutinosa L) species. For this purpose, three normal alder trees were selected from Khanican ...
Effects on density, shrinking, color changing and chemical surface analysis through FTIR of Tectona grandis thermo-treated: Density, shrinking, color changing and chemical analysis by FTIR of the thermally-treated teak wood
(Forest Sciences, 2016)
Thermal-treatment wood is used as an option to improve durability of wood in recent years. This study
evaluated the effect of temperature in thermally treated Tectona grandis wood in density, shrinking, color
changing ...
Influencia de los nutrientes minerales, características del suelo, edad del árbol y condiciones ambientales en el color del duramen y algunas propiedades en la madera de Tectona grandis (TECA-COLOR)
(Instituto Tecnológico de Costa Rica. Escuela de Ingeniería Forestal, 2009)
Aunque el color de la madera de teca es un factor importante para su comercialización, las causas de la variación en el color son poco conocidos. Este problema no solo ocurre madera proveniente del habitad natural, si no ...
Torrefacción del aserrín de cinco tipos de maderas de Costa Rica para aumentar el contenido energético (Documento I)
(Instituto Tecnológico de Costa Rica. Vicerrectoría de Investigación y Extensión (VIE). Escuela de Ingeniería Forestal. Centro de Investigación en Innovación Forestal (CIF), 2017)
La torrefacción de biomasa consiste en someter el material a temperaturas que varían entre 200°C a 300°C, en ausencia de oxigeno por periodos que varían de 5 a 35 minutos. Durante esas condiciones la biomasa pierde una ...
Reducing warp and checking in 4 by 4 beams from small-diameter tropical species (tectona grandis, gmelina arborea, and cordia alliodora) obtained by turning the pith inside out.
(Forest Products Society, 2015)
Small-diameter logs from plantation trees are prone to warp and to produce checks due to the presence of juvenile wood, growth stresses, and asymmetric shrinkage during the drying process. In the present study, we analyzed ...
Secadora solar
(Instituto Tecnológico de Costa Rica. Vicerrectoría de Investigación y Extensión (VIE). Escuela de Ingeniería Forestal, 2007)
El proyecto Secadora Solar se planteó como una actividad de fortalecimiento de la
Escuela de Ingeniería Forestal (EIFO). La intención de esta actividad se concretó en la
construcción de la secadora y en la realización ...
Effects of adding multiwall carbon nanotubes on performance of polyvinyl acetate and urea-formaldehyde adhesives in tropical timber species
(Hindawi Publishing Corporation, 2015)
Multiwall carbon nanotubes (MWCNTs) functionalized with hydroxyl groups (MWCNTs-OH) have been incorporated into polyvinyl acetate (PVAc) and urea-formaldehyde (UF) adhesives utilized in tropical wood gluing. The Raman ...