Listar por palabras clave "Research Subject Categories::FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING::Product science::Wood fibre and forest products"
Mostrando ítems 1-12 de 12
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Effects of adding nano-clay (montmorillonite) on performance of polyvinyl acetate (PVAc) and urea-formaldehyde (UF) adhesives in Carapa guianensis, a tropical species
(Elsevier Ltd, 2015-06)The aim of this study was to improve the bond strength resistance of polyvinyl acetate (PVAc) and urea-formaldehyde (UF) adhesives modified with nano-clay (montmorillonite) with a tropical species of wood known to exhibit ... -
Effects of thinning on diameter, heartwood, density and drying defects of gmelina arborea
(Universidade Federal de Sao Carlos, 2015)The effect of three levels thinning intensity in Gmelina arborea plantation on tree diameter, heartwood (diameter and percentage), wood density and drying defects (twist, crook, bow and check) was studied. Wood used for ... -
Evaluación de parámetros genéticos de Tectona Grandis Linn
(Instituto Tecnológico de Costa Rica, 2018)Se evaluó un ensayo de progenie de Tectona grandis ubicado en el cantón de Hojancha, Guanacaste, conformado por 28 familias de árboles plus más un testigo. Como objetivo se propuso determinar los parámetros genéticos de ... -
Evaluation of biodeterioration and the dynamic modulus of elasticity of wood in ten fast-growing tropical species in costa rica exposed to field testing
(Statny Drevarsky Vyskumny Ustav, 2015)In tropical regions, it is possible to produce a large variety of timber species in plantation conditions. However, wood from these trees has low natural durability. Biodeterioration and the dynamic modulus of elasticity ... -
General, physical and mechanical properties, termites resistance and drying defects of lumber of Tectona grandis from plantations of different climatic and sites fertility condition
(Springer India, 2015-06)The influence of climatic and site fertility conditions affect wood quality from fast growing trees. The change in tree diameter, thickness of sapwood, heartwood percentage and bark and pith tissue, physical and mechanical ... -
Mineral content in relation to radial position, altitude, chemical properties and density of persian ironwood
(Universidade Federal de Sao Carlos, 2015)Persian ironwood (Parrotia persica) is native species from Iran and covers 10,54% of the commercial volume. Its wood structure and its chemical composition are affected by growth conditions. The aim of the study was to ... -
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 ... -
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 ... -
Production and quality analysis of pellets manufactured from five potential energy crops in the Northern Region of Costa Rica
(Biomass and Bioenergy, 2016)Modifications to a pellet manufacturing process must be made based on the characteristics of raw material used. The purpose of this work was to determine the alternations required to a wood pellet manufacturing process ... -
Propuesta de un plan maestro integral para la finca Blanco, Liverpool, Limón, Costa Rica
(Instituto Tecnológico de Costa Rica, 2018)El presente trabajo desarrolla un plan maestro forestal para la finca Blanco perteneciente a JAPDEVA, ubicada en Río Blanco de Liverpool, Limón. Esta posee más de 137 ha sin manejo alguno y sin un rumbo claro para su ... -
Uso de mariposas como bioindicadoras del estado de recuperación de bosques manejados, Pital, San Carlos, Alajuela, Costa Rica
(Instituto Tecnológico de Costa Rica, 2018)El aprovechamiento de los ecosistemas boscosos genera diversos impactos, entre ellos la posible fragmentación y degradación del ecosistema. Sin embargo, actualmente se conocen pocos métodos para determinar el estado de ... -
Wood characterization of adult clones of Tecnona grandis growing in Costa Rica
(CERNE, 2015)Tectona grandis is an important wood in the commercial market due to its excellent workability, durability and aesthetic characteristics. Therefore, it is important to improve the conditions of reproduction and development ...