Investigation of relationships between cell and pulp properties in Eucalyptus by examination of within-tree property variations

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

“…The reported values for the flexibility coefficient ranged from 0.37 to 0.65 in several Eucalyptus species (Pirralho et al 2014) and were 0.70 and 0.72 in E. camaldulensis and E. globulus, Note: n; number of core segments in a tree for calculating wood properties related to pulp and paper qualities, ns; no significant, Values in parenthesis are standard deviation. respectively (Ona et al 2001). In the present study, the mean values for the flexibility coefficient were 0.93 for M. bancana and 0.92 for M. pearsonii (Table 5).…”

“…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.…”

“…However, further research is needed to characterize the potential wood resources from other unutilized fast-growing tree species. The pulp and paper qualities can be evaluated by wood properties including anatomical characteristics (Amidon 1981, Ona et al 2001, Ohshima et al 2005, Ashori and Nourbakhsh 2009, Yahya et al 2010, Dutt and Tyagi 2011, Pirralho et al 2014, Istikowati et al 2016, although these qualities are also closely related to the chemical characteristics of wood. The pulp and paper quality, based on wood properties like anatomical characteristics, can be estimated using the following indices: Runkel ratio (Runkel 1949), Luce＇s shape factor (Luce 1970), flexibility coefficient (Malan and Gerischer 1987), slenderness ratio (Malan and Gerischer 1987), solids factor (Barefoot et al 1964), and wall coverage ratio (Hudson et al 1998).…”

“…The pulp and paper quality, based on wood properties like anatomical characteristics, can be estimated using the following indices: Runkel ratio (Runkel 1949), Luce＇s shape factor (Luce 1970), flexibility coefficient (Malan and Gerischer 1987), slenderness ratio (Malan and Gerischer 1987), solids factor (Barefoot et al 1964), and wall coverage ratio (Hudson et al 1998). These indices have also been used for fast-growing tree species, such as Acacia species (Yahya et al 2010) and Eucalyptus species (Hudson et al 1998, Ona et al 2001, Ohshima et al 2005, Dutt and Tyagi 2011, Pirralho et al 2014). …”

Effects of Ethanol Addition and Biological Pretreatment on Soda Pulping of &lt;i&gt;Eulaliopsis binata&lt;/i&gt;

“…Luce's shape factor of E. binata (0.54) was less than lemon grass (0.71) and sofia grass (0.79). Luce's shape factor and solid factor are related to paper sheet density and could be significantly correlated to breaking length of paper [29]. Solid factor of E. binata was 183.45 less than lemon (240.24) and higher than sofia grass (165.63).…”