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Dr. Ratih Damayanti
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ratih_turmuzi@yahoo.com
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+622187914511
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ejournal_wrj@gmail.com
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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 10 Documents
 1 
Search results for , issue "Vol 1, No 1 (2010): Wood Research Journal" : 10 Documents clear
Evaluation of Isolated Compounds from Wood of Artocarpus heterophyllus as A Cosmetic Agent Enos Tangke Arung; Kuniyoshi Shimizu; Ryuichiro Kondo
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.2010.1.1.40-44

Abstract

In our efforts to find new whitening agent materials, we focused on wood of Artocarpus heterophyllus which is anti melanogenesis. By activity-guided fractionation of A. heterophyllus wood extract, norartocarpetin and artocarpesin were isolated which inhibited both mushroom tyrosinase activity and melanin formation in B16 melanoma cells. This compound is a strong candidate as a remedy for hyperpigmentation in human skin that can be used for cosmetic (whitening agent).
Analyses on Though-Bolts Type Wooden Beam-Column Joints Subjected to Rotational Moment Kohei Komatsu
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.2010.1.1.13-21

Abstract

This paper introduces an examples of analyses on the elasto-plastic behavior of so-called “through-bolts type” wooden beam-column steel joints which are widely used in modern wooden residential houses recent in Japan. The analyses were done on two parts, one of which was “glulam column-steel gusset joint” where column and gusset are connected by using “though bolts” and the other part was “steel gusset-glulam beam joint” where gusset and beam are connected by using drift pins. By the theoretical analyses, initial stiffness, yielding moment and second stiffness were derived so as to include various parameters in a closed form. Full scale experiments were also carried out using three replications on two different types of test specimens. Comparisons between theoretical predictions and experimental observations showed good agreements.
Anti-acne and Tyrosinase Inhibition Properties of Taxifolin and Some Flavanonol Rhamnosides from Kempas (Koompassia malaccensis) Irmanida Batubara; Harlinda Kuspradini; Tohru Mitsunaga
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.2010.1.1.45-49

Abstract

Taxifolin (1) and some flavanonol rhamnosides (neoastilbin (2), astilbin (3), and isoastilbin (4)) have been isolated from kempas (Koompassia malaccensis).  Our previous research about antimicrobial activity against Streptococcus sobrinus and glucosyltransferase inhibitory activity of these compounds have been reported. Now, we carried out the anti-acne and tyrosinase inhibition properties of all four compounds.  Antimicrobial against Propionibacterium acnes, P. acnes lipase inhibitory activity and antioxidant activity were established for anti-acne activity.  Tyrosinase inhibition property was measured using L-tyrosine and L-DOPA as substrate.  The results for anti-acne showed that no antimicrobial activity against P. acnes for all compounds, the best lipase inhibition properties showed on compound 4 with IC50 about 1.36 mg/ml, and % inhibition for antioxidant at concentration 10 mg/ml are 31.16, 25.64, 28.47, and 31.01% respectively.  Tyrosinase inhibition of compound 1 at concentration 1 mg/ml is 24.12% for monophenolase and 5.18% for diphenolase. Compound 2 has tyrosinase inhibition about 25.95% (monophenolase) and 14.18% (diphenolase) at concentration 1 mg/ml. Compound 3 has tyrosinase inhibition about 27.17% (monophenolase) and 6.23% (diphenolase) at same concentration, while compound 4 has tyrosinase inhibition about 11.17% (monophenolase) and 9.75% (diphenolase).
Wear of Wood Polymer Composite for Journal Bearing Materials Sinin Hamdan; Mohd. Abdul Mun’aim; Mohd. Idrus; Md. Rezaur Rahman; Nurul Faziha Ibrahim; Md. Saiful Islam
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.2010.1.1.22-26

Abstract

Wood is broadly used for automotive parts, construction materials, and equipment for leisure-time amusement; however, its application for journal bearings has been restricted due to its low strength and poor tribological characteristics. In this work, Falcataria moluccana or Paraserianthes moluccana, locally known as Batai wood, which have low density and high porosity were impregnated with motor oil, (SL/CF 15W-50), hexamethylene diisocyanate, and diphenylmethane-4, 4’-diisocyanate to improve their compressive strength and tribological characteristics. A vacuum-pressure method was used to impregnate the wood specimens. From scanning electron microscopy (SEM) analysis, wear test, and compression test results, it was found that the hexamethylene diisocyanate was a promising material to improve the physical properties of wood for journal bearings.
Characterization of Poplar Overexpressing Xylanase Yong Woo Park; Kei’ichi Baba; Yuzo Furuta; Keisuke Kojiro; Masato Yoshida; Takahisa Hayashi
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.2010.1.1.50-55

Abstract

We expressed Hordeum vulgare (barley) xylanase constitutively in Populus tremula x alba (poplar). The expression of xylanase reduced not only the amount of hemicellulose but also the amount of lignin in the secondary xylem. Stem and leaf growth rates were accelerated in transgenic plants. The stems also developed increased flexibility, especially in their younger parts, specifically, the regions above the 10th internode from the top. The secondary walls in the xylem would be slower to mature in xylanase-expressing poplar than in the wild type.
Manufacture and Properties of Non-Wood Binderlessboard: Effect of Storage Method and Manufacturing Process on Chemical Composition of Bagasse Binderlessboard Ragil Widyorini; Shuichi Kawai
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.2010.1.1.27-33

Abstract

Effects of storage and pressing methods on the chemical composition of Sugarcane (Saccharum officinarum L.) bagasse binderlessboards were investigated by chemical and spectroscopic analyses. The inner layer (core/pith) and the outer hard fibrous layer (face/rind) of bagasse were used as raw materials. The result showed that effect of steam-injection pressing was higher than hot pressing treatment on the chemical composition of bagasse binderlessboards. Under steam-pressure of 1.0 MPa for 10 min, hemicelluloses of bagasse were more significantly degraded than α-cellulose and lignin. Decreasing of Syringyl/Guaiacyl (S/G) and Cinnamic acids/Guaiacyl (C/G) ratios indicated that modification of lignin had occurred during steam and heat treatments. Considering that the residual sugar in bagasse was still high, the storage method of Sugarcane bagasse was an important key for producing bagasse binderlessboards.
Characterization of Cuticle Layer of Ilex latifolia Jun-ichi Azuma; Shuntaro Tsubaki; Rike Yudianti; Myrtha Karina
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.2010.1.1.56-63

Abstract

Cuticular membranes were isolated from the upper and lower surfaces of Ilex latifolia leaves and their morphological, chemical compositional and mechanical properties were characterized.  The upper cuticular membrane contained 18.6% wax, 53.5% cutin and 17.5% cutan with low contaminating carbohydrates (10.4%), while the lower cuticular membrane had the values of 17.9%, 49.2%, 15.8% and 17.1%.  Both membranes were rich in aliphatic CH2 groups, and the main monomer of the cutin in the upper cuticular membrane was 9(10),18-dihydroxyhexadecanoic acid while 9,10,18-trihydroxyoctadecanoic acid in the lower membrane. Mechanical analyses indicate clear orientation differences in breaking stress and strain between the two membranes with higher breaking stress in the upper cuticular membrane and in the longitudinal direction parallel to the midvein. Additive such as a cellulosic hydrogel from Salvia viridis to make a composite influenced the mechnical properties of the cuticular membranes. Mechanical properties of the isolated cuticular membranes may be more influenced by their morphological properties than chemical compositions; thick and smooth structure of the upper cuticular membrane, while wrinkled and scattered stoma-rich structure of the lower cuticular membrane.
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. 
Wood Density Variations of Tropical Wood Species: Implications to the Physical Properties of Sawdust as Substrate for Mushroom Cultivation Maharani Rizki; Yutaka Tamai; Keiichi Koda; Yasuo Kojima; Minoru Terazawa
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.2010.1.1.34-39

Abstract

The physical properties of sawdust including particle size distribution, particle density, porosity and water retention of tropical wood species were examined taking sixteen different wood densities users into consideration. Sawdust of each wood species was prepared using a milling machine (type CE TUV, made in Germany) with thickness of band saw size of 2 mm. Particle size of sawdust was classified into 3 classes; Over Size (OS) < 24 mesh (<710 µm); Coarse Particle Size (CPS = 350µm~710 µm) and Fine Particle Size (FPS = 177 µm~250 µm). In relation to the physical properties analysis, OS particle was excluded due to high variation in the particle size distribution but significant lowest in the proportion comparing to the FPS and CPS. Although statistical analysis showed that different wood density revealed relatively weak relationship with particle size distribution however wood density had positively correlated with the particle density. High of wood density tended to make higher particle density of sawdust. In addition, comparison between CPS and FPS for each wood species generally showed that CPS was significantly higher in porosity but lower in particle density and water retention than that FPS. Further, a comparison between different wood species in porosity and water retention showed different pattern, increasing wood density was negatively correlated with the porosity in CPS and also FPS; however the different wood density not showed significant relationship with the water retention.
Treatment of Oil Palm Wood with Low-Molecular Weight Phenol Formaldehyde Resin and Its Planing Characteristics Chong Yi Way; Edi Suhaimi Bakar; Zaidon Ashaari; Mohd. Hamami Sahri
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.2010.1.1.7-12

Abstract

In line with the Malaysian government calls to turn waste into wealth, oil palm wood (OPW) is establishing itself as a potential wood substitute. However, the OPW on its own has four imperfections, i.e.: low strength, low durability, poor dimensional stability, and poor machining characteristics. Previous studies have shown that the first three imperfections were able to be solved by impregnating with low molecular weight phenol formaldehyde (Lmw-PF) through modified compreg method. But, the machining behaviour of OPW remains uncovered. A planing test was carried out to evaluate the machining characteristics of the treated OPW. For comparison purpose, another set of test for the rubberwood and untreated OPW samples were also conducted. It is acknowledged that the planing quality of the treated OPW is of equal grade to that of rubberwood. In general, the planing of the treated OPW and the rubberwood fell into the Grade I (very good), compared to Grade III (average) for untreated OPW. The treatment significantly improves the machining characteristics of OPW, adding significant improvements on the physico-mechanical properties, durability, and appearance that have been proven in the previous studies, which make it can be used as a new, high-grade alternative for solid wood material.

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