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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 6 Documents
 1 
Search results for , issue "Vol 2, No 2 (2011): Wood Research Journal" : 6 Documents clear
Some of the Properties of Binderless Particleboard Manufactured from Bamboo Ragil Widyorini; Ari Puspa Yudha; Tibertus Agus Prayitno
Wood Research Journal Vol 2, No 2 (2011): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2011.2.2.89-93

Abstract

Bambo particles as a waste byproduct from bamboo processing industry are suggested to be a promising material for binderless particleboard. The quality of binderless particleboard is affected by several factors, such as pretreatment, pressing method, pressing condition, moisture content, and particle size. This study was focused on the effect of particle size and moisture content on the physical and mechanical properties of binderless particleboard from Petung bamboo (Dendrocalamus asper Backer) and conducted using the completely randomized design with two factors. Bamboo particles in three types of particle size, i.e. coarse (10~20 mesh), medium (20~60 mesh), and fine (passed 60 mesh), were used as materials for binderless board. Each particle size was then prepared for two moisture content conditions: air dry and 20±2%. Binderless boards were prepared by hot pressing at temperature of 200°C for 15 min, and the properties of the binderless boards were then evaluated according to the Japanese Industrial Standard for particleboard, JIS A 5908. The results showed that the binderless boards made from 20±2% moisture content particles showed better mechanical and dimensional properties than those made from air-dried particles. The binderless particleboard made from medium size and the moisture content of 20±2% recorded a modulus of rupture of 94 kg/cm², water absorption of 29%, thickness swelling of 5%, internal bond strength of 2.7 kg/cm², and modulus of elasticity of 19.490 kg/cm².
Utilization of Melaleuca leucadendron Essential Oil Rini Pujiarti; Yoshito Ohtani; Titis Budi Widowati; Kasmudjo Kasmudjo
Wood Research Journal Vol 2, No 2 (2011): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2011.2.2.94-99

Abstract

The chemical composition, antioxidant, antifungal, and physiological effects of commercial Melaleuca leucadendron LINN. (Kayu Putih) oil from Sukun, East Java, Indonesia was investigated in this study. GC-MS analysis showed the majority compounds of this oil are mixtures of monoterpenes and sesquiterpenes, which 1,8-cineole (53.90%) was the most abundant compound in this oil. In vitro antioxidant assay showed this essential oil possessed antioxidant activity (IC50: 4.24mg/ml). In vitro antifungal assay showed relatively strong antifungal activity of this oil against plant pathogenic fungi of F. oxysporum (IC50: 0.44mg/ml), T. cucumeris (IC50: 0.97mg/ml) and R. oryzae (IC50: 7.71mg/ml). The investigation on the effect of the odor of M. leucadendron oil in this study also showed functional fragrance of this oil for human physiological behavior controlling.
Distribution of Oil Palm Starch for Different Levels and Portions of Oil Palm Trunk Nur Syuhada Omar; Edi Suhaimi Bakar; Nurulasikin Md. Jalil; Paridah Md. Tahir; Wan Md. Zin Wan Yunus
Wood Research Journal Vol 2, No 2 (2011): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2011.2.2.73-77

Abstract

It is widely known that starch can be heated to have adhesive characteristic. The properties of starch rich, low density oil palm wood from the inner part of oil palm trunk (OPT) have been seen to be possible improved through steam-densification process by using in situ starch as binding agent. For that, the distribution and characteristic of the extracted starch at different height and portions of OPT are first need to be investigated. Starch extraction of OPT was made by traditional grating-dissolving method in water. Starch distributions were found more concentrated in core portion and it increased as the heights increasing. At the first 2 m height above the ground, mean extracted starch content was 2.9%, 4.3% and 5.6% for the outer, middle and core respectively. Regardless of portion, mean extracted starch content was 4.3%, 7.4%, 7.7% and 8.5% for the first, second, third, and fourth 2 m trunk height respectively. Regardless of level, mean extracted starch content was 4.9%, 7.2% and 8.8% for the outer, middle and core portion respectively. Other study using Na2S2O5 as solvent gave 7.15% mean starch content for the oil palm slabs (the outer portion). Further study on the extracted starch characterization, it was found that the starch from core portion turned into darker blue color than the outer, and the starch from upper level turned into darker blue color than the lower level when they were subjected to iodine test. The blue color is usually used to indicate the purity of starch, the darker the color, the purer the starch. The results suggest that both the extracted starch content and the starch purity were showing the same trend, increased from outer inside and from bottom upside, in the OPT.
Berberine in the Medicinal Plant of Tali kuning (Tinospora dissitiflora Diels) Wahyudi Wahyudi; Y. Ohtani; H. Ichiura
Wood Research Journal Vol 2, No 2 (2011): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2011.2.2.100-104

Abstract

Two different approaches have been used to determine the bioactive compounds in the medicinal plant of Tali kuning (Tinospora dissitiflora Diels). Firstly, the conventional approach using column chromatography (CC), and preparative thin layer chromatography (PLC) eluted with benzene:ethyl acetate: formic acid (5:4:1, and 5:4:2, respectively), followed by CC eluted with benzene:methanol (3:2) were used to separate and isolate berberine from the chloroform fraction of Tali kuning. Structural elucidations of the isolated compounds were conducted using nuclear magnetic resonance (NMR) and mass spectrometry (MS). Secondly, a rapid and simple approach use the integrated intensities of proton signals for H-13 and H-8 of berberine on 1H-NMR spectra, then the qualitative and quantitative determination of berberine in Tali kuning can be achieved directly from the crude extracts using 1H-NMR. The proton signals for H-13 and H-8 of berberine on 1H-NMR spectra, which appeared at empty regions as singlet, and without interference from the other signals, were available for qualitative determination of berberine. Whereas, the integrated intensity of proton signal for H-13 on 1H-NMR spectrum was used for quantitative determination of berberine. Berberine content of Tali kuning was calculated manually based on the integrated intensity of proton H-13 from the authentic berberine chloride, which was 18.6 mg/g based on the weight of air-dried wood meal. This berberine content was comparable to that (22.78 mg/g) of Amur corktree (Phellodendron amurense Rupr), which is widely acknowledged for good producer of berberine.
Effect of Hole Diameter and Drying Condition on Shrinkage and Defect of Sugi (Cryptomeria japonica D. Don) Wood in Convective Air Dryer Yustinus Suranto; Kazuo Hayashi
Wood Research Journal Vol 2, No 2 (2011): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2011.2.2.%p

Abstract

Sugi wood containing pith in the centre of specimen has a very low drying ability and very easy to suffer a defect due to drying on convective dryer. Trunk of sugi trees grown artificially in Matsuyama forest district were cut longitudinally to some rectangular samples in dimension of 12.3 cm x 12.3 cm x 1.5 cm (length). Every six of samples were grouped in one group. The first unit of the sample in every group was intended to measure initial moisture content and another five units of the samples  were subjected to treatment in a hole in the center of the sample with a diameter’s dimension of 0 cm, 2.46 cm, 3.075 cm, 4.1 cm and 6.15 cm respectively. The first until the ninth  group were dried in air convective dryer with temperature of 50°C and relative humidity of 80%, while the tenth until the nineteenth group were dried at temperature of 80°C and relative humidity of 87%. Every stage of drying, each of the samples was weighted and measured for tangential and radial shrinkage as well as length of crack. Data was analyzed using completely randomized design in a factorial arrangement.The result showed that the smaller hole diameter and the higher drying condition, the lower  final moisture content, the higher tangential shrinkage, the higher radial shrinkage and the longer of the total crack.
A Study on the Production Method of Kenaf High Fiber Strength Wiwin Suwinarti; Zhou Chen; Susumu Nakahara; Ryo Sugawara; Kazuhiko Sameshima
Wood Research Journal Vol 2, No 2 (2011): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2011.2.2.83-88

Abstract

Kenaf bast fiber from 58 varieties grown in Zhejiang province, China, was treated using three treatments. First treatment used ammonium oxalate, sodium hydroxide and acidic chlorite (AT3), second treatment used ammonium oxalate and sodium hydroxide (AT0) and the third one was retting treatment (RET). Some parameters such as diameter, height and weight of stalk, and also fiber strength were measured for screening method.Treatment AT3 show much better strength than the other two. It means the single fiber which belongs to AT3 is stronger than the bundle fiber of AT0 and RET. Moreover the chemical treatment of AT0 has much stronger bundle fiber than RET. The best-8 varieties (kenaf sample number 8, 11, 12, 30, 32, 48, 52 and 58) were selected based on the fiber strength and kenaf sample number 12 and 32 reached the superior two if evaluated with other factors.

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