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Dr. Ratih Damayanti
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Research Center for Biomaterials,Indonesian Institute of Sciences Jl. Raya Bogor Km 46, Cibinong, Bogor 16911, Indonesia
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INDONESIA
Wood Research Journal : Journal of Indonesian Wood Research Society
Published by Masyarakat Peneliti Kayu Indonesia
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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Wood Properties of Three Fruit Tree Species Planted in Central Kalimantan, Indonesia Haruna Aiso; Futoshi Ishiguri; Kazuko Makino; Imam Wahyudi; Yuya Takashima; Tatsuhiro Ohkubo; Kazuya Iizuka; Shinso Yokota
Wood Research Journal Vol 4, No 2 (2013): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2013.4.2.53-61

Abstract

The objective of this study was to evaluate the properties for wood utilization of fruit trees planted in Central Kalimantan, Indonesia. A total of 9 jambu bol (Syzygium malaccense), rambutan (Nephelium lappaceum), and durian (Durio zibethinus) trees were randomly selected from the plot (20 by 30 m) and measured for stem diameter, tree height, stress-wave velocity (SWV), and Pilodyn penetration of the trees. Mean values of stem diameter were 11.8, 15.9, and 29.3 cm for S. malaccense, N. lappaceum, and D. zibethinus, respectively. Mean values of stress-wave velocity were 3.16, 3.95, and 3.63 km/s for S. malaccense, N. lappaceum, and D. zibethinus, respectively. Core samples (5 mm in diameter) were collected from these trees to investigate the wood properties [basic density (BD) and compressive strength parallel to grain (CS)], anatomical characteristics [vessel diameter (VD), cell wall thickness (CWT) in wood fiber, and cell length (CL) of wood fiber and vessel element], and amounts of chemical components. In VD, CWT in wood fiber, and CL in wood fiber and vessel element, almost the same radial variation patterns were found in the three species. Relatively higher values in SWV, BD, and CS were found in N. lappaceum, suggesting that its wood can be used for construction lumber. On the other hand, S. malaccense and D. zibethinus had relatively thicker CWT in wood fiber, longer CL in wood fiber, and lower Klason lignin content. It is considered that the wood of these two species may be suitable for pulpwood.
Mechanical Properties of Cocos nucifera Wood Planted Around Mt. Merapi, Yogyakarta Ali Awaludin; J.P. Gentur Sutapa
Wood Research Journal Vol 3, No 1 (2012): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2012.3.1.6-10

Abstract

This study presented test results of mechanical properties of Cocos nucifera wood that were planted around Mt. Merapi, Yogyakarta. The test specimens were obtained from trees that had been exposed to pyroclastic flow during the 2010 volcanic eruption as indicated by dark colour of the outer bark. Test set-up was designed according to ASTM D143-94 and the mechanical properties, which are determined based on the lower 5% exclusion limit, were bending strength, shear strength, dowel bearing strength and compressive strength. Results of the specific gravity measurement showed significant variation of specific gravity between the inner part (close to the pith) and the outer part (far from the pith) in a cross-section. Since mechanical properties generally depend upon specific gravity, it was decided to divide the wood specimens into two groups: specimens from the inner part and specimens from the outer part. Most of the mechanical properties of wood specimens from the inner part, except for bending strength, were found to be much lower than E10 grade of the Indonesian National Standard (SNI). Hence it is not recommended for any structural use. In the case of wood specimens from the outer part, their mechanical properties were as follows: bending strength 83.66 MPa; shear strength parallel to grain 4.41 MPa; dowel bearing strength parallel to grain 40.65 MPa; dowel bearing strength perpendicular to grain 25.88 MPa, compressive strength parallel to grain 37.89 MPa; and compressive strength perpendicular to grain 7.48 MPa. It seemed that the wood specimens from the outer part had excellent mechanical properties especially in bending, but their shear strength is extremely low.
Radial Variation of Wood Property in Agathis sp. and Pinus insularis Growing at Plantation in Indonesia Futoshi Ishiguri; Imam Wahyudi; Kazuya Iizuka; Shinso Yokota; Nobuo Yoshizawa
Wood Research Journal Vol 1, No 1 (2010): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2010.1.1.1-6

Abstract

To obtain basic knowledge of wood properties in plantation coniferous species growing in tropical countries, the radial variation of wood properties, such as the basic density (BD) and microfibril angle of the S2 layer in tracheid (MFA), and the compressive properties were investigated in 45-year-old Agathis sp. and 32-year-old Pinus insularis growing in Indonesia. In Agathis sp., the BD showed an almost constant value from the pith to the bark. In P. insularis, the BD of heartwood clearly decreased by the extraction with organic solvent. As a result, the BD extracted with organic solvent showed a constant value up to 5 cm from the pith and then gradually increased toward the bark. In the radial variation of the MFA, the highest value was observed near the pith in both species. In the compressive property parallel to the grain, the modulus of elasticity (E) and compressive strength (s) showed an almost constant value from the pith to the bark in Agathis sp., whereas, in P. insularis, both E and s increased from the pith to the bark. In both species, the E was affected by the MFA. In addition, in Agathis sp., s was affected by the BD, while in P. insularis, it was affected by the BD extracted with organic solvent and the MFA. 
Effects of Wood Modification Using Natural Resin on Wood Quality and Bonding Properties Muhammad Navis Rofii; Ragil Widyorini; Ganis Lukmandaru
Wood Research Journal Vol 10, No 2 (2019): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2019.10.2.48-52

Abstract

The aim of this study was to investigate the effect of gum rosin impregnation upon a low quality young teak wood in order to enhance its quality. The main objective of the treatment was to enhance the dimensional stability, as well as strength and to reduce the hygroscopicity. A 15-years old thinned teak wood (Tectona grandis L.f.) and gum rosin from Pinus merkusii Jungh. et de Vries were used for wood modification treatment by impregnation. Three kinds of non-polar solvents, i.e. turpentine oil, petroleum oil and n-hexane-, were used to make gum rosin solution. The results indicated that gum rosin impregnation did not markedly enhance the quality of young teak wood in terms of either dimensional stability or hygroscopicity; however, a little enhancement was delivered by using 15% gum rosin solution with n-hexane as the solvent. The treatment with petroleum oil solvent (at concentration of 7.5%) and at 15% concentration with n-hexane solvent resulted in highest bending properties. The highest bonding strength in dry condition was resulted by treatment with turpentine oil solvent.
Effects of Temperature and Time of Carbonization on the Properties of Bamboo (Dendrocalamus asper) Carbon Subyakto Subyakto; Ismail Budiman; Gustan Pari
Wood Research Journal Vol 3, No 2 (2012): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2012.3.2.68-73

Abstract

Lignocellulosic materials such as wood and bamboo have special characteristics when carbonized at high temperature. For example the electrical conductivity of wood and bamboo increases when carbonized at temperature of 800°C or higher. This property can be used for developing smart materials such as fiber reinforced concrete which has function as sensors for load, damage or temperature. In this experiment, betung bamboo (Dendrocalamus asper) was carbonized at different temperatures and times of carbonization. The purpose of this experiment was to observe the effect of temperature and time of carbonization on the properties of bamboo carbon. Bamboo in the form of particles were carbonized at temperature of 400°C for 300 min and continued at temperatures of 700, 800, or 900°C for 45, 60, or 90 min. Carbon properties such as yield, fixed carbon, volatile matters, and ash content were determined. Structure properties were studied by X Ray Diffraction (XRD), morphological properties were observed by Scanning Electron Microscope (SEM), and electrical conductivity was measured using LCR meter. Result shows that increasing temperature and time of carbonization have significant effects on the structure and other properties of bamboo carbon. Carbonization at temperature of 800°C for 60 min was considered as an optimum condition.
Chemical and Mechanical Properties of Cuticular Membranes Isolated from Young Matured Leaves of Sonneratia alba Yuki Takahashi; Shuntaro Tsubaki; Masahiro Sakamoto; Shin Watanabe; Wahyu Dwianto; Jun-ichi Azuma
Wood Research Journal Vol 2, No 1 (2011): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2011.2.1.69-72

Abstract

Leaf cuticular membranes (CMs) of Sonneratia alba are considered to play an important role in environmental tolerance, and chemical and mechanical properties of their CMs are crucial factors which provide protective barrier and mechanical supports.  Leaf CMs were enzymatically isolated from both adaxial and abaxial sides of young matured leaves (L3), and their chemical and mechanical properties were compared. Chemical compositions of both CMs were similar reflecting their morphological similarity.  The adaxial CM was consisted of 23.4% wax, 64.2% cutin, 7.4% cutan and 6.1% polysaccharides with thickness of 9 µm, and the abaxial CM had the values of 23.9%, 63.2%, 9.4%, 4.2% and 8 µm, respectively.  Major monomers in both cutins were 9,10-epoxy-18-hydroxyoctadecanoic acid and 9(10),16-dihydroxyhexadecanoic acid.  Mechanical properties of both CMs were also similar reflecting their morphological and chemical compositional similarities.
Wood Anatomical Features and Physical Properties of Fast Growing Red Meranti from Line Planting at Natural Forest of Central Kalimantan Joko Sulistyo; Harry Praptoyo; Ganis Lukmandaru; Ragil Widyorini; Widyatno Widyatno; Oka Karyanto; Sri Nugroho Marsoem
Wood Research Journal Vol 9, No 2 (2018): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2018.9.2.52-59

Abstract

High productivity fast growing species plantation establishment such as the line planting of red meranti (i.e Shorealeprosula and Shorea parvifolia) with intensive silviculture is one potential solution to improve wood supply for industries in Indonesia. However, the information of anatomical properties and wood properties of these two species related to the influence of the line planting system and tree growth rate is limited. This paper studies the anatomical features, wood cell proportions, fiber dimensions and physical properties of wood in radial variation in relation to the line planting effect and tree growth rate. Wood of the trees grown in the line planting system showed higher proportion of vessel element compared to those of wood from natural forest. The vessel diameter of wood from the line planting was also larger than that of in wood from natural forest. The specific gravity of wood from Shorea parvifolia grown on the line planting was higher than that of wood grown in natural forest. The variation of specific gravity on wood portion near to the pith of Shorea leprosula and Shorea parvifolia trees grown on the line planting was related to the variation of the cell wall thickness. The bigger diameter of trees grown or the faster growth rate in the line of planting at the same age shows the greater vessel diameter in wood of Shorea leprosula and Shorea parvifolia and greater specific gravity of Shorea parvifolia wood.
Age Variation of Wood Anatomical Characteristics in Larix cajanderi Tree Nadezhda I. Blokhina; Olesya V. Bondarenko; Sergey V. Osipov
Wood Research Journal Vol 2, No 1 (2011): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2011.2.1.1-12

Abstract

The paper is the first results of the study of age variation of wood anatomy in Larix cajanderi Mayr (Pinaceae). The anatomical study was made from one L. cajanderi tree grown in the optimal habitat for L. cajanderi within areal of this species. Age variability of anatomical characteristics in the direction from pith to bark and along the height of stem is described in detail. Mature wood in L. cajanderi is formed in the base of stem and at breast height in the growth rings numbers 31~40 inclusively, and in the middle of stem in the growth rings numbers 41~50 inclusively. Characteristic features of mature stem wood were not found near the top of tree. Maximal parameters of anatomical characters usually occur in the base of stem. Age variation of wood anatomical characteristics in L. cajanderi tree was obtained for the first time.
Potential Utilization of Wooden Particleboard Patent to Analyze Research and Development Foresight Sasa Sofyan Munawar; Firman Tri Aji; Tommy Hendrix; Bambang Subiyanto
Wood Research Journal Vol 6, No 1 (2015): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2015.6.1.21-29

Abstract

Initiating commodities development from natural resources transforms into primarily issue that preserve many  opportunities in utilization of potential and useful diversification model especially wood products. The value of technology analyzes foresight need to be used optimally to seek many opportunities in new variation technology that can implemented into market demand. Now the new technology has pushed into much needed to optimize the amount of raw material that could be processed into new product diversification. One of the problem solution that could comply with analyzing patent database is to find technology from Research and Development (R & D) result to be ready to use, for instance particleboard products as wooden product diversification. This paper discusses on how user could know their development of technology for market orientation through patent portfolio, licensing, status, competitor, innovation and monitoring on emerging market with patent database which has been registered on WIPO fields. Methodology applied in this paper is based on software named Total Patent in order to see more information related to particleboard technology utilization as potential consideration through leading patent-issuing authorities. The aim of paper is to obtain data from patent analysis in particleboard and to find out the development of technology foresight products which have been produced as well as how competitors movement, especially in wood utilization. The conclusion from utilization of R & D on particleboard patent database could be applied in case of developing opportunity in disseminating on industrial and stakeholders which requires impact on newest implementation of technology and level competitiveness in appropriate designation to wooden based products commercialization.
Uniaxial Tension of Yellow Meranti Timber at an Angle to the Grain Yosafat Aji Pranata; Roky Surono
Wood Research Journal Vol 4, No 2 (2013): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2013.4.2.83-87

Abstract

Tensile strength measures the force applied to a timber element/structural element to the point where it breaks. In this paper, a finite element analysis (FEA) of uniaxial tension of Yellow Meranti timber (Shorea spp.), using von Mises Criterion to include orthotropic nature of the material, was used to derive a prediction of tensile strength at an angle to the grain (cross grain) in plane stress (2D) modeling. To investigate the validity of the finite element analysis results, various 5°, 10°, and 15° cross grain specimens of Yellow Meranti (Shorea spp.) were tested in laboratory under uniaxial tension stress using UTM instrument. Comparison with experimental results shows that the FEA simulation predicts the stress-strain curves lower than experimental results, which result shows good agreement, it is seen from %-relative difference which is less than 30%. Calculations were performed with the numerical analysis (FEA) and Experimental Tests gives results that the difference is not too significant, for specimens with a grain angle of 5° difference in outcomes by 27%, for a grain angle of 10° difference in outcomes by 25%, and for a grain angle 15° difference in outcomes by 22%.

Page 8 of 16 | Total Record : 157

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