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Dr. Ratih Damayant
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INDONESIA
Wood Research Journal : Journal of Indonesian Wood Research Society
Published by Indonesian Wood Research Society
ISSN : 20873840     EISSN : 27749320     DOI : 10.51850/wrj
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Wood Research Journal is the official journal of the Indonesian Wood Research Society. This journal is an international medium in exchanging, sharing and discussing the science and technology of wood. The journal publishes original manuscripts of basic and applied research of wood science and technology related to Anatomy, Properties, Quality Enhancement, Machining, Engineering and Constructions, Panel and Composites, Entomology and Preservation, Chemistry, Non Wood Forest Products, Pulp and Papers, Biomass Energy, and Biotechnology. Besides that, this journal also publishes review manuscripts which topics are decided by the Editors.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Kehutanan
Articles 157 Documents
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Antifungal Activity and Identification of Active Compounds From Wood Tristaniopsis whiteana (Griff) Against Wood Rot Fungus Jemi, Renhart; Syafii, Wasrin; Febrianto, Fauzi; Hanafi, Muhammad
Wood Research Journal Vol 15, No 1 (2024): WOOD RESEARCH JOURNAL
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2024.15.1.28-35

Abstract

The aim of the study was to analyze the content of pelawan wood extractive substances (Tristaniopsis whiteana (Griff)) and to test it with the fungi Schizophyllum commune Fr and Pleurotus ostreatus. Pelawan heartwood powder was macerated with methanol. Then fractionated in stages with n-hexane, chloroform, ethyl acetate, and butanol. The resulting extract was then tested with S. commune and P. ostreatus fungi. The most active fraction was isolated using column chromatography with a gradient system, the eluent was methanol:chloroform. Sub-fractions were then tested for fungi to determine the most active sub-fractions, and the most active sub-fractions were then analyzed by 1H NMR. The results showed that the extractive content of pelawan wood was most soluble in chloroform. All extract fractions contain potential as anti-fungal. .The chloroform fraction was very active compared to the other fractions. Isolation of the chloroform fraction by column chromatography obtained 8 sub-fractions. All of these sub-fractions were able to inhibit the growth of S.commune and P.ostreatus with IC(50) = 54.55 - 64.69 mg/L and IC(50) = 54.17 - 64.44 mg/L respectively. PL.3 sub-fraction was the most active among the 8 sub-fractions. The results of 1H NMR analysis on the PL.3 subfraction were shown to be Heptanoic Acid compounds.
Chemical Properties of “Jati Unggul Nusantara” Teak Wood from Gunungkidul Lukmandaru, Ganis; Pratama, Ardhan Wira; Sutapa, Johanes Pramana Gentur; Sunarta, Sigit; Irawati, Denny; Pujiarti, Rini; Arisandi, Rizki
Wood Research Journal Vol 15, No 1 (2024): WOOD RESEARCH JOURNAL
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2024.15.1.8-14

Abstract

Jati Unggul Nusantara (JUN) trees show a fast-growing characteristic and a possibility to be harvested in short rotation. This study aims to determine the chemical properties of 8-year-old JUN tree parts. Three individual trees were felled from Paliyan, Gunungkidu, Yogyakarta, Indonesia. The tree parts were observed vertically (i.e., the bottom, center, top, branches, and twigs) and radially (i.e., sapwood and heartwood of the trunk). The result showed that the average content of cell wall components of extractive-free wood, i.e., hemicellulose, α-cellulose, and lignin, were 20.38~25.71%, 41.88~49.10%, and 26.46~29.85%, respectively. Furthermore, successive extractive measurements showed that ethanol-toluene and hot-water soluble extracts (based on dry wood) were at the levels of 3.01~7.58% and 1.85~3.09%, respectively. The ash content, silica content, and pH values were 0.48~0.82%, 0.13~0.37%, and 5.89~7.51%, respectively. By an analysis of variance, significant differences between the sapwood and the heartwood were observed in ethanol-toluene extractive, lignin, holocellulose, and cellulose contents. The differences among tree parts did not show any significant effect on the hot-water soluble content. Significant differences between the main stem and branches or between the main stem and twigs were observed in most chemical properties.
Extractive Content and Antioxidant Activity of Cajuput Bark (Melaleuca cajuputi Powell) Harliando, Bagus Praditya; Lukmandaru, Ganis; Kartikawati, Noor Khomsah
Wood Research Journal Vol 15, No 2 (2024): WOOD RESEARCH JOURNAL
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2024.15.2.63-68

Abstract

Both wood and non-wood industries generate large amounts of residues from processes like bark peeling and removal. In the cajuput oil industry, the waste products include distillation residues and cajuput bark. The diverse extractives and chemical components found in cajuput bark have the potential for enhanced value through various applications. This study aimed to determine the chemical components, extractive content (EC), and percentage inhibition of antioxidant activity (%IAA) of cajuput bark extract to explore more effective uses of this byproduct. Cajuput bark (Melaleuca cajuputi Powell) was sourced from a 26-year-old cajuput stand in Paliyan, Gunungkidul. The bark powder was extracted using a methanol-water solvent mixture at concentrations of 40% and 80%. Extraction was conducted in water baths at temperatures of 60°C and 100°C for 120 minutes. GC-MS identified several chemical components in the methanol extract of cajuput bark, including sugars (erythritol, D-arabinose, D-lyxose, adonitol, d-galactose, D-glucitol, and L-rhamnose), fatty acids (lactic acid, glycerol, glyceric acid, malic acid, and palmitic acid), and phenolic derivatives (gallic acid and protocatechuic acid). The average extractive content of the methanol extract of cajuput bark was 4.07%, and the percentage inhibition of antioxidant activity was 40.26%.
Chemical components of boiling-treated sengon (Paraserianthes falcataria (L.) I. C. Nielsen) wood Kurniawan, Fajar Arief; Syaharanie, Audyta Aurelia; Lukmandaru, Ganis
Wood Research Journal Vol 15, No 2 (2024): WOOD RESEARCH JOURNAL
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2024.15.2.55-62

Abstract

Sengon is a fast-growing wood species widely distributed on Java Island and commonly utilised for plywood production. It is frequently subjected to boiling treatment to reduce veneer defects, making it important to understand how this treatment affects its properties. This study investigated the effect of boiling treatment on the properties of sengon wood, involving three seven-year-old trees which were subjected to a control and an experimental treatment at 80℃ for ten hours. The wood specimens were divided into near-pith, middle, and near-bark sections. The specimens were powdered to a size of 40–60 mesh for successive extraction with n-hexane, methanol, and hot water. The total phenolic content was measured from the methanol-soluble extract, and the total polysaccharide content was measured from the hot-water-soluble extract. Chemical components such as holocellulose, alpha-cellulose, hemicellulose, lignin, ash, and silica contents, as well as pH values, were determined. T-test revealed that boiling treatment significantly reduced extractive levels (in ethanol-toluene and methanol solubles) but significantly increased total phenolic and polysaccharide contents. No significant effect was observed on cell wall chemical components. One-way ANOVA indicated that the radial direction significantly affected methanol-soluble extractive content, total phenolic content, and total polysaccharide content.
Comparative Study of Flexural Behavior of Bolted-Laminated and Glue-Laminated Sengon Timber Beams (Albizia falcataria) Pranata, Yosafat Aji; Kristianto, Anang; Novi, Novi
Wood Research Journal Vol 15, No 2 (2024): WOOD RESEARCH JOURNAL
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2024.15.2.43-48

Abstract

This study aimed to study the flexural behavior of bolt-laminated and glue-laminated sengon (Albizia falcataria) timber beams, which are flexural strength, modulus of rupture (MoR), and beam ductility. The study was conducted using an experimental testing method in the laboratory with reference to the ASTM D198. The number of test objects were three consecutively for bolt-laminated beams and glue-laminated beams. Results obtained from this study indicated that the flexural strength of bolt-laminated and glue-laminated sengon timber beams was not significantly different; the flexural strength of bolt-laminated beams were 3.1% higher compared to glue-laminated beams. The MoR and ductility of bolt-laminated beams were 8.4% and 14.2% higher compared to glue-laminated beams. These results indicate that the glue has an impact to the brittle behavior or limited ductility, while the bolts have an impact to make a more ductile beams. The general conclusion is that mechanical laminated timber technology can be an alternative to producing beams with larger cross-sectional sizes compared to solid timber, especially for low-grade wood, so that it can be used as part of the structural elements of buildings.
A Study on the Application of Wax on Linden (Tilia tomentosa Moench.) Wood Peker, Hüseyin; Ulay, Göksel; Ayata, Ümit
Wood Research Journal Vol 15, No 2 (2024): WOOD RESEARCH JOURNAL
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2024.15.2.49-54

Abstract

Linden wood is used in match production, double bass making, carving, musical instrument crafting, and furniture production. This study examined the effects of applying varying numbers of wax coats (1, 2, and 3 coats) on the color parameters, glossiness values, and whiteness index (WI*) values of linden (Tilia tomentosa Moench.) wood surfaces. A comparison was made between untreated surfaces and those treated with three different wax applications. According to the obtained results, all tests except for hue angle were found to be significant in the analysis of variance. The ∆E* values were found to be 5.13 for the application of 1 coat of wax, 6.53 for the application of 2 coats of wax, and 6.95 for the application of 3 coats of wax. After applying waxes to the wood, reductions were noted in WI* and L* values, while enhancements were detected in glossiness readings at 60 and 85 degrees, as well as in a*, C*, ho, and b*values. 
Application of Single and Double Component Wood Bleaching Chemicals on Surface Properties of Naga (Brachystegia cynometroides) Wood Peker, Hüseyin; Ulay, Göksel; Ayata, Ümit
Wood Research Journal Vol 15, No 2 (2024): WOOD RESEARCH JOURNAL
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2024.15.2.37-42

Abstract

In this study, some surface changes (color parameters, whiteness index (WI*), and glossiness) occurring after the application of single [oxalic acid (C2H2O4)] and double component [sodium hydroxide (NaOH) + hydrogen peroxide (H2O2)] wood bleaching chemicals on naga (Brachystegia cynometroides) wood were investigated. The bleached surfaces were compared with the unbleached surfaces. According to the obtained results, the ∆E* values were determined as 2.99 for C2H2O4 chemical and 16.95 for NaOH + H2O2 chemical. Significant results were found for all tests in the analysis of variance. Increases in b* and C* values were observed with C2H2O4, while decreases were observed with NaOH + H2O2 chemical. With both wood bleaching chemicals, increases were found in WI* values in parallel directions to the fibers, as well as in ho and L* values, while decreases were obtained in glossiness values at 60 and 85 degrees in both parallel and perpendicular directions to the fibers, and in a* values.

Page 16 of 16 | Total Record : 157

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