Radial variations in the anatomical characteristics and density of the wood of Acacia mangium of five different provenances in Indonesia

Nugroho, Widyanto Dwi; Marsoem, Sri Nugroho; Yasue, Koh; Fujiwara, Takeshi; Nakajima, Takeshi; Hayakawa, Masanori; Nakaba, Satoshi; Yamagishi, Yusuke; Jin, Hyun Seung; Kubo, Takafumi; Funada, Ryo

doi:10.1007/s10086-011-1236-4

Cited by 55 publications

(59 citation statements)

References 22 publications

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“…The highest growth rate and auxin concentration in the trees during the fi rst years may have infl uenced cambial activity and increased pore frequency (PANSHIN; DE ZEEUW, 1980;NUGROHO et al, 2012;LEAL et al, 2003). The pores are important during pulping (PIRRALHO et al, 2014) for reagent penetration into the wood.…”

Section: Resultsmentioning

confidence: 99%

PULP PRODUCED WITH WOOD FROM Eucalyptus TREES DAMAGED BY WIND

Zanuncio

Carvalho

Carneiro

et al. 2016

CERNE

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Wind may damage eucalyptus trees, especially 24 months after planting, which can reduce wood fiber quality and hinder pulp production. The objective of this study was to evaluate the use of these materials in mixtures with wood from seven-yearold trees to produce pulp. Bleached pulp was produced using 100, 95, 85, 75 and 0% wood from seven-year-old eucalyptus trees, related to cutting age. Wood from two-yearold trees, when trees are most susceptible to damage by wind, completed each treatment. A 5 cm thick disc was taken from breast height (1.3m) on each tree for anatomical and ultrastructural characterization. The seven-year-old wood had lower vessel frequency and fibers with a longer length, higher cell wall fraction, higher modulus of elasticity and hardness, and a lower microfibril angle. Pulp refining decreased the opacity and specific volume, increased air resistance and improved mechanical properties. The addition of two-year-old wood to produce pulp reduced the mechanical properties and opacity, and increased the air resistance of the paper. The proportion of two-year-old wood that can be used in pulp production varied with the clone, parameter, and refining level. However, the pulp produced with 5% wood from two-year-old trees and 95% wood from sevenyear-old trees was similar to that with 100% seven-year-old wood. Therefore, 5% twoyear-old wood can be used to produce pulp without quality losses. PRODUÇÃO DE POLPA CELULÓSICA COM MADEIRA DE ÁRVORES DEEucalyptus DANIFICADAS PELO VENTO RESUMO: Árvores de eucalipto de rápido crescimento podem ser danificadas por ventos, principalmente 24 meses após o plantio, mas a baixa qualidade das fibras dessa madeira dificulta a produção de polpa celulósica. O objetivo deste estudo foi avaliar a utilização destes materiais para a fabricação de polpa celulósica em misturas com madeira de árvores de sete anos de idade. Polpa celulósica branqueada foi produzida com 100, 95, 85, 75 e 0% de madeira de árvores de dois clones de Eucalyptus grandis x Eucalyptus urophylla com sete anos de idade, relacionada com a idade de corte. Madeira de árvores de dois anos de idade, mais susceptíveis a danos por ventos, foi utilizada para completar cada tratamento. Um disco de espessura de 5 cm foi retirado na altura do peito (1,3 m) em cada árvore para a caracterização anatômica e ultra-estrutural. As árvores com sete anos apresentaram maior frequência de vasos, fibras com maior comprimento, fração parede, módulo de elasticidade e dureza e menor ângulo microfibrilar. O refino nas polpas diminuiu a opacidade e o volume específico e aumentou a resistência a passagem do ar e as propriedades mecânicas. A adição de madeira de dois anos de idade na produção de polpa celulósica reduziu a resistência mecânica e opacidade e aumentou a resistência à passagem de ar. A proporção da madeira de dois anos de idade, que pode ser utilizado na produção de polpa celulósica variou com o clone, parâmetro avaliado e intensidade do refino. No entanto, a polpa celulósica produzida com 5% de madeira de do...

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Section: Resultsmentioning

confidence: 99%

PULP PRODUCED WITH WOOD FROM Eucalyptus TREES DAMAGED BY WIND

Zanuncio

Carvalho

Carneiro

et al. 2016

CERNE

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“…Therefore, wood with short vessel elements with small diameters is preferable for paper production. The reported mean vessel diameters were 136 µm for A. mangium (Nugroho et al 2012), 120 µm for E. camaldulensis, 157 µm for E. globulus (Ona et al 2001), and 156 µm for E. tereticornis (Sharma et al 2005), while the mean vessel element lengths were 0.24 mm for A. auriculiformis (Chowdhury et al 2009), 0.31 mm for E. tereticornis (Sharma et al 2005), 0.22 mm for E. camaldulensis, and 0.19 mm for E. maculata (Pirralho et al 2014). As shown in Table 3, the vessel diameters and vessel element lengths of the two Macaranga species studied here were relatively larger and longer than those reported for Acacia and Eucalyptus species.…”

Section: Anatomical Characteristicsmentioning

confidence: 99%

Wood properties related to pulp and paper quality in two <i>Macaranga</i> species naturally regenerated in secondary forests, Central Kalimantan, Indonesia

Takeuchi

Wahyudi

Aiso

et al. 2016

Tropics

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The utilization of wood resources from unutilized fast-growing tree species found in secondary forests was investigated by studying the wood properties, including anatomical characteristics, of two Macaranga species-M. bancana and M. pearsonii-growing naturally in secondary forests in Central Kalimantan, Indonesia. Several wood properties related to pulp and paper quality were also evaluated, including the Runkel ratio, Luce＇s shape factor, flexibility coefficient, slenderness ratio, solid factor, and wall coverage ratio. The mean basic density of these two species ranged from 0.23 to 0.31 g cm , while the mean values of vessel diameter, vessel element length, fiber diameter, fiber wall thickness, and fiber length ranged from 126 to 192 µm, 0.88 to 1.19 mm, 24.5 to 29.8 µm, 0.99 to 1.14 µm, and 1.42 to 1.69 mm, respectively. The lignin content of M. bancana and M. pearsonii wood was 27.2 and 28.0%, respectively. Almost all wood properties related to pulp quality showed better values than those reported for Acacia and Eucalyptus species, although sheet density of paper might be lower due to higher solids factor and possibility of occurrence of vessel picking was probably higher due to longer vessel element length and larger vessel diameter. Based on the results, the wood from these two Macaranga species can be used as pulpwood.

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“…This physical property can be useful to classify the various types of wood (Alteyrac et al, 2005;Nugroho et al, 2012). Thus, the demarcation between juvenile and mature woods shall be considered a method for wood classification in function of radial position.…”

Section: Introductionmentioning

confidence: 99%

Age of Segregation of Brazilian Sycamore Wood From Two Different Physiographic Regions

et al. 2017

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ABSTRACT:The manufacture of wooden pieces with appropriate properties according to each type of use requires a great knowledge about their variability, especially in the radial direction. The present study aims to determine the age of segregation between juvenile and mature woods of sycamore (Platanus x acerifolia) wood by the radial variation of its basic density. Sycamore trees were randomly selected in two physiographic regions of the southern Brazil, namely Central Depreciation and Hill Top northeast. To determine density, the volume of the saturated samples was measured by the buoyancy method and the dry mass was obtained by weighing after drying in an oven at 103 °C. Sycamore wood segregated at distance between 11 cm and 16 cm from the pitch, corresponding to the 12 th and 15 th growth rings. The density presented significant variability when compared between regions and/or juvenile and mature woods. RESUMO:

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Radial variations in the anatomical characteristics and density of the wood of Acacia mangium of five different provenances in Indonesia

Cited by 55 publications

References 22 publications

PULP PRODUCED WITH WOOD FROM Eucalyptus TREES DAMAGED BY WIND

PULP PRODUCED WITH WOOD FROM Eucalyptus TREES DAMAGED BY WIND

Wood properties related to pulp and paper quality in two <i>Macaranga</i> species naturally regenerated in secondary forests, Central Kalimantan, Indonesia

Age of Segregation of Brazilian Sycamore Wood From Two Different Physiographic Regions

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