Effect of anatomical and chemical structure in the permeability of "Amapá" wood

Baraúna, Edy Eime Pereira; Lima, José Tarcísio; Vieira, Renato da Silva; Silva, José Reinaldo Moreira da; Monteiro, Thiago Campos

doi:10.1590/01047760201420041501

Cited by 20 publications

(23 citation statements)

References 10 publications

(18 reference statements)

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“…According to Siau (1984) and Baraúna et al (2014), the heartwood and sapwood proportion affects the wood permeability, which is evidenced by the three clones when presenting permeability values and H/S relation in inverse proportions (Table 3).…”

Section: Eucalyptus Wood Heartwood and Sapwood Permeabilitymentioning

confidence: 93%

Effect Of Planting Spacing In Production And Permeability Of Heartwood And Sapwood Of Eucalyptus Wood

et al. 2019

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The objective of this work was to evaluate the influence of different useful areas provided by the planting spacings (3 × 1, 3 × 2, 3 × 3, 3 × 4 m) on the production and permeability of heartwood and sapwood of Eucalyptus grandis and Eucalyptus grandis × Eucalyptus urophylla clones at 4 years old. Regardless of the clone, there was no effect of planting spacing on the heartwood/sapwood relation and wood permeability. All clones showed a heartwood decrease with increased height, regardless of planting spacing, and E. grandis (B) was the only one that had its heartwood percentage positively and significantly correlated with the dendrometric variables (DBH and commercial height). The use of the dymethil yellow compound was indispensable in defining the heartwood and sapwood regions in the samples from 50% of the stem height. The heartwood permeability was low in all evaluated clones, suggesting vessel obstruction by tyloses or other deposits, while sapwood permeability reached 405.4 cm3/cm.atm.s.

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Section: Eucalyptus Wood Heartwood and Sapwood Permeabilitymentioning

confidence: 93%

Effect Of Planting Spacing In Production And Permeability Of Heartwood And Sapwood Of Eucalyptus Wood

et al. 2019

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“…Therefore, one of the hypotheses for the high variation of permeability for this material can be due to the irregular process of heartwood formation in tree ring growth, in addition to the fact that some of the samples were collected close to the bark (75% of the radius) with heartwood portions. Baraúna et al (2014) stated that the high variation of permeability values in tropical wood is mainly due to the heterogeneity of their anatomic properties across the growth rings. That being said, the anatomic characteristics of teak wood, such as pore distribution, can also explain the high variation of permeability values observed in this study.…”

Section: Wood Permeabilitymentioning

confidence: 99%

Effect of Age on Heartwood / Sapwood Relationship, Extractive Contente, and Permeability of Teak Wood

Canal

Carvalho

Carneiro

et al. 2020

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Due to the physiological differences in the juvenile and adult phases of teak wood, differentiation occurs in the impregnation by extractive materials along the heartwood regions, assuming that there is also a significant variation in the permeability of this material. Thus, the study aimed to evaluate the influence of age on the heartwood / sapwood ratio (H/S), permeability, and extractives content of Tectona grandis L.f wood. Four ages (10, 12, 14, and 16 years) and four trees (repetitions) were evaluated, totaling 16 samples. The H/S ratio, extractive content, and wood permeability were determined, in addition to the average and maximum permeability among all ages selected for calculation of their porosity. The H/S ratio increased over the ages of 10 and 16, and the content of extractive materials increased until the age of 14. There was a high heterogeneity between the permeability values of the wood at all ages analyzed, and one of the possible explanations for this fact is the presence of tyloses in different places on the trunk and the arrangement of the pores around the growth rings.

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“…To the permeability test the same dimentions described by other authors were adopted (BARAÚNA et al, 2014;TAGHIYARI et al, 2012;TAGHIYARI et al 2015). To the final dimentipons, the samples had their longitudinal face waterproofed with maritime varnish with polyurethane base (two applications).…”

Section: Wood Density and Permeabilitymentioning

confidence: 99%

“…Vapor treatment allows drying process optimization due to permeability increase, resulting from pits and vessels clearance (ALEXIOU et al, 1990). In such a way, the permeability is directly related to anatomical structures (BARAÚNA et al , 2014), as well as with the balance of the water entrance and exit from the wood and the easiness of preservative fluid penetration (BREADS et al, 2013;GAO et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

INFLUENCE OF VAPORIZATION AND IMPREGNATION OF SILVER NANOPARTICLES ON THE DRYING RATE OF Eucalyptus pellita F. MUELL.

Pace

Latorraca

Carvalho

et al. 2019

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The aim of this study was to evaluate the effect of vaporization and impregnation of silver nanoparticles on the Eucalyptus pellita wood properties. For that, samples of three radial regions of the wood from three trees were vaporized for 12 and 24 hours and later on, they were immersed in solution of silver nanoparticles with and without application of vacuum (750 mm.Hg). Anatomical, physical and chemical analyzes of the wood were carried out in order to evaluate the effect of the treatments. The drying rate of the wood was determined in moisture bands before and after the fiber saturation point. Generally, the treatments did not modify the anatomical characteristics, permeability, and wood density in the three radial regions; however, the vaporization for 24h reduced the total extractive content in the wood. These results contributed in obtaining gains in the drying rate before and after the fiber saturation point. The effect of impregnation of nanoparticles with vacuum preceded by two periods of vaporization resulted in higher drying rates and the time of 24h stood out, resulting in the best averages among all treatments. The impregnation of nanoparticles had positive effects on the drying rate.

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Effect of anatomical and chemical structure in the permeability of "Amapá" wood

Cited by 20 publications

References 10 publications

Effect Of Planting Spacing In Production And Permeability Of Heartwood And Sapwood Of Eucalyptus Wood

Effect Of Planting Spacing In Production And Permeability Of Heartwood And Sapwood Of Eucalyptus Wood

Effect of Age on Heartwood / Sapwood Relationship, Extractive Contente, and Permeability of Teak Wood

INFLUENCE OF VAPORIZATION AND IMPREGNATION OF SILVER NANOPARTICLES ON THE DRYING RATE OF Eucalyptus pellita F. MUELL.

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