Published in Maderas Ciencia y tecnología
We analyzed the effects of heat treatment on the chemical structure of wood from narrow-leafed Ash (Fraxinus angustifolia), a fast-growing and economically valuable species. We also analyzed the effects of heat treatment on the wood's resistance to four decay fungi. Narrow-leafed Ash wood samples were heated with saturated steam to 140, 180, 200, a...
Published in Maderas Ciencia y tecnología
Se ha estudiado el efecto de distintos dosajes en masa de nanofibras de celulosa (CNF), comprendidas entre un 0 y un 6%, sobre las propiedades físico-mecánicas del papel obtenido a partir de las fibras de pasta mecánica de muela de piedra (SGW). Los resultados obtenidos se han comparado con el procedimiento convencional de refinado a distintos grad...
Published in Maderas Ciencia y tecnología
In this study, some characteristics of Rhizophora spp. particleboards bonded with Serishoom (traditional animal–based adhesive) as a phantom material was investigated. The Rhizophora spp. particleboards were fabricated in two Serishoom adhesive treatment levels (6% and 12%) with three Rhizophora spp. particle sizes (≤ 149 µm, 149 µm – 500 µm, and 5...
Published in Maderas Ciencia y tecnología
The potential effects of plant derived oils on survival of dampwood termite (Zootermopsis augusticollis) workers was explored on western white pine sapwood blocks. All of the oils rapidly affected protozoa in the hindgut of termite workers and protozoa loss was closely followed by worker mortality. The effects were most rapid with wood treated with...
Published in Maderas Ciencia y tecnología
The present study is focused on the effects of the shape and size of Fagus orientalis wood flour on physical and mechanical properties of HDPE based wood plastic composites (WPC). Variables included two mesh sizes (20 and 60), as well as five different contents of ground shavings (0, 25, 50, 75, and 100%) mixed with sawdust; totally 10 treatments. ...
Published in Maderas Ciencia y tecnología
El raleo tiene implicancias económicas y técnicas para producción forestal y para la actividad industrial. El objetivo del estudio fue determinar la influencia de la intensidad de raleo sobre las propiedades anatómicas de la madera. Se trabajó con muestras tomadas a 1,30 m de altura, de 24 árboles proveniente de un ensayo de raleo en Pinus taeda de...
Published in Maderas Ciencia y tecnología
The aim of this study was to investigate the decay resistance of particleboards treated with nano-zinc oxide against the white-rot fungus Trametes versicolor and the brown-rot species Coniophora puteana. The nanomaterial was used for manufacturing particleboards at 5, 10 and 15% wt based on the glue dry weight. The soil block decay test was perform...
Published in Maderas Ciencia y tecnología
To turn wood into a construction material with enhanced properties, many methods of chemical modification have been developed in the last few decades. In this work, mechanical properties of pine wood were chemically modified, compared and evaluated. Maritime pine wood (Pinus pinaster) was modified with four chemical processes: 1,3-dimethylol-4,5-di...
Published in Maderas Ciencia y tecnología
Nano CuO and alkane surfactant modified phenol Formaldehyde (PF) resins were applied to manufacture plywood, and physical and mechanical properties, such as shear strength, tensile property, modulus of rupture (MOR), modulus of elasticity (MOE), as well as termite resistance were evaluated. The result showed that the combination of nano CuO and alk...
Published in Maderas Ciencia y tecnología
As an environmentally friendly alternative to chemical treatment, this research aimed to establish whether dielectric heating at high frequency of infested lodgepole pine (Pinus contorta) boards and logs, obtained from the mountain pine beetle devastated forests of British Columbia, can result in wood free of living fungi, nematodes and insects. Th...
