Exponential Curve Modification by Linear and Nonlinear Function to Fit the 
 Fiber Length of Teakwood (Tectona grandis)

Bahtiar, Effendi Tri; Darwis, Atmawi

doi:10.3923/jbs.2014.183.194

Cited by 7 publications

(16 citation statements)

References 7 publications

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“…The FLs of teak wood at 4 and 5 years old are 876.66 and 1071.51 (Wahyudi et al 2014). Meanwhile, FLs of 9 years old teak wood close to pith and to bark were 881 and 1281 lm, respectively (Bahtiar and Darwis 2014).…”

Section: Fiber Length (Fl)mentioning

confidence: 99%

“…In all of those cases, it means all data are acquired from juvenile area since it does not have asymptote line (Bahtiar and Darwis 2014).…”

Section: Second Order Polynomial (Quadratic)mentioning

confidence: 99%

“…Bahtiar and Darwis (2014) used modified exponential curve to analyze fiber length of teak wood at 5 age classes. The study revealed that exponential curve modified with second order logarithm on FL was better than the modified with quadratic equation in explaining transition from juvenile to mature wood.…”

Section: Fl Fwt and Mfa At Each Segmentmentioning

confidence: 99%

“…Two methods will be compared in defining transition point from juvenile to mature part. Those two methods were based on modified exponential curve, which were quadratic equation and second order logarithm (Bahtiar and Darwis 2014). The result would be expected to improve the utilization of samama wood, such as for laminated board, plywood, or LVL.…”

Section: Introductionmentioning

confidence: 99%

“…fiber length) from pith to bark and visually determine the juvenile point (Clark et al 2006). Another method is mathematical approach, such as segmented-regression (Tasissa and Burkhart 1998;Darmawan et al 2013), polynomial equation (Koubaa et al 2005) and modified exponential curve with linier and non-linier equation (Bahtiar and Darwis 2014).…”

Section: Introductionmentioning

confidence: 99%

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The quality of 8 and 10 years old samama wood (Anthocephalus macrophyllus)

Cahyono

Wahyudi

Priadi

et al. 2015

J Indian Acad Wood Sci

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In the near future, wood demand will be fulfilled by local fast growing woods from community forest. Among those, samama (Anthocephalus macrophyllus) is an endemic wood in Celebes and Moluccas. This species has been cultivated throughout Indonesia and usually harvested at age of less than 10 years. This research was conducted to examine the quality of samama wood at 8 and 10 years old. Each age group was represented by three healthy trees. Samples were made from 1 cm segmentation from pith to bark. Modified exponential curve was used to determine the transition of juvenile and mature wood in which maturity limit was achieved when growth parameter had reached the asymptote line. The quality parameters were specific gravity, moisture content, fiber length, fiber wall thickness and microfibril angle. The result showed that the first 6-8 segmentations from the pith were still juvenile, while the subsequent segments were mature wood. The 8 years old had 33.3-38.9 % of juvenile portion, while it was only 30.4-34.8 % in the 10 years old. This finding will be important in considering a proper technology for samama wood processing.

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Section: Fiber Length (Fl)mentioning

confidence: 99%

“…In all of those cases, it means all data are acquired from juvenile area since it does not have asymptote line (Bahtiar and Darwis 2014).…”

Section: Second Order Polynomial (Quadratic)mentioning

confidence: 99%

Section: Fl Fwt and Mfa At Each Segmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The quality of 8 and 10 years old samama wood (Anthocephalus macrophyllus)

Cahyono

Wahyudi

Priadi

et al. 2015

J Indian Acad Wood Sci

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Effect of degumming of two selected Indonesian Ramie (Boehmeria nivea) accessions on the anatomical, chemical, mechanical, and thermal properties

Bakshi,

Sohail,

Karimah

et al. 2024

Industrial Crops and Products

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Chemical properties, crystallinity, and fiber biometry of Jabon (Anthocephalus cadamba) wood for pulp raw material: the effect of age and position

Darwis,

Karliati,

Sutrisno

et al. 2023

Nordic Pulp &Amp; Paper Research Journal

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Jabon (Anthocephalus cadamba) is a promising plant species with straight, visually pleasing trunks that can be harvested at a young age as a resource for pulp and paper production due to the rapid growth rate possessed. Therefore, this study aims to investigate the chemical composition and fiber biometry of 3, 6, and 9-year-old Jabon wood, determining their suitability as a pulp and paper raw material. Samples were collected from both stem and branch sections and analyzed according to the Tappi standard. Fiber cell maceration was conducted to enable the precise measurement of fiber dimensions and derivatives. The results showed high cellulose, holocellulose, and lignin content in Jabon wood, with low to moderate levels of extractives and ash. Additionally, the crystallinity index (CrI) increased with age, particularly from 3 to 9 years old. The branch of the plant, with Grade II fiber derivative quality, had lower CrI compared to the stem, while the inner stem showed a lesser value than the outer part. In conclusion, 3-year-old Jabon wood is a potential raw material for pulp and paper production.

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Exponential Curve Modification by Linear and Nonlinear Function to Fit the Fiber Length of Teakwood (Tectona grandis)

Cited by 7 publications

References 7 publications

The quality of 8 and 10 years old samama wood (Anthocephalus macrophyllus)

The quality of 8 and 10 years old samama wood (Anthocephalus macrophyllus)

Effect of degumming of two selected Indonesian Ramie (Boehmeria nivea) accessions on the anatomical, chemical, mechanical, and thermal properties

Chemical properties, crystallinity, and fiber biometry of Jabon (Anthocephalus cadamba) wood for pulp raw material: the effect of age and position

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