Results 1 to 10 of about 115,070 (189)

No-reference quality assessment for image-based assessment of economically important tropical woods. [PDF]

open access: yesPLoS ONE, 2020
Image Quality Assessment (IQA) is essential for the accuracy of systems for automatic recognition of tree species for wood samples. In this study, a No-Reference IQA (NR-IQA), wood NR-IQA (WNR-IQA) metric was proposed to assess the quality of wood images.
Heshalini Rajagopal   +3 more
doaj   +2 more sources

Physical and Combustion properties investigation of hybrid briquettes from tropical Sawdust: Case study of Iroko (Milicia excelsa) and Padouk (Pterocarpus soyauxii)

open access: yesEnergy Reports, 2023
In the wood processing industry, sawmills generate huge amounts of sawdust as a renewable energy source. This paper aims to describe the production process and investigate the physico-chemical properties of mixed briquettes from two tropical sawdust ...
Winnie Tchatat Tomen   +3 more
doaj   +1 more source

Wood specific gravity of trees and forest types in the southern Peruvian Amazon [PDF]

open access: yesActa Amazonica, 2000
Estimates of terrestrial biomass depend critically on reliable information about the specific gravity of the wood of forest trees. The study reported on here was carried out in the southern Peruvian Amazon and involved collection of wood samples from ...
Deborah W. WOODCOCK
doaj   +1 more source

Characterization of acoustic and mechanical properties of common tropical woods used in classical guitars

open access: yesResults in Physics, 2017
There is a need of substitution woods for the use in musical instruments because of the limited availability of some commonly used tropical tonewoods. Before substitutions can be found, it is necessary to know about the required properties.
Robert Sproßmann   +2 more
doaj   +1 more source

Chemical and biological evaluation of rejects from the wood industry

open access: yesBrazilian Archives of Biology and Technology, 2005
This study aimed chemical characterization and microbiological evaluation of extracts obtained from the waste of woods marketed in Paraná State: Peroba-Rosa (Aspidosperma sp.), Roxinho (Peltogyne sp.), Jatobá(Hymenaea sp.), Curupixá (Micropholis sp ...
Daniel Granato   +6 more
doaj   +1 more source

Mechanical Characterization of Iroko Wood Using Small Specimens

open access: yesBuildings, 2021
Despite their favorable physical and mechanical properties for structural use, tropical woods, such as Iroko (Milicia excelsa), present knowledge gaps to be filled mainly about their mechanical characterization, which currently limit their use or result ...
Carlos Cunha   +5 more
doaj   +1 more source

Physical and Compression Properties of Pellets Manufactured with the Biomass of Five Woody Tropical Species of Costa Rica Torrefied at Different Temperatures and Times

open access: yesEnergies, 2017
The purpose of the biomass torrefaction and pelletizing processes is to increase its energy properties, be environmentally friendly, decrease shipping costs, and make handling easier. The objective of the present work is to evaluate the density, internal
Johanna Gaitán-Alvarez   +3 more
doaj   +1 more source

Basic specific gravity and anatomy of Peltophorum dubium wood as a function of provenance and radial position. Densidade aparente e anatomia da madeira de Peltophorum dubium em função da procedência e posição radial. [PDF]

open access: yesRevista do Instituto Florestal, 2015
We studied the wood of Peltophorum dubium (Spreng.) Taub. (Fabaceae), popularly known in Brazil as canafístula, from two seed provenances with different climates. The trees were planted in a third place and cut when 28 years old.
Israel Luiz de LIMA   +5 more
doaj   +1 more source

Distinct responses of soil respiration to experimental litter manipulation in temperate woodland and tropical forest [PDF]

open access: yes, 2018
Global change is affecting primary productivity in forests worldwide, and this, in turn, will alter long‐term carbon (C) sequestration in wooded ecosystems.
Allen   +36 more
core   +3 more sources

Physico-mechanical properties of the wood of freijó, Cordia goeldiana (Boraginacea), produced in a multi-stratified agroforestry system in the southwestern Amazon [PDF]

open access: yesActa Amazonica, 2021
Agroforestry systems (AFSs) integrate, through sustainable practices, agricultural and forest crops for the production of wood and food, providing environmental services, and conserving biodiversity.
Adriano Reis Prazeres MASCARENHAS   +5 more
doaj   +1 more source

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