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Jurnal Ilmu dan Teknologi Kayu Tropis

JITKT
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Published by Masyarakat Peneliti Kayu Indonesia

ISSN : - EISSN : 16933834 DOI : -

Core Subject : Agriculture,

Agriculture, Biological Sciences & Forestry

Jurnal ini mempublikasikan artikel asli baik penelitian dasar maupun terapan di bidang ilmu pengetahuan dan teknologi kayu, bahan berlignoselulosa bukan kayu, hasil hutan lainnya dan industri hasil hutan.

Arjuna Subject : -

Articles 316 Documents

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Aktivitas Larvasida Aedes aegypti Ekstrak Kayu Jati Hasil Ekstraksi Hidrotropi (Larvicidal Activity Against Aedes aegypti of Teak Wood Extracts from Hydrotropic Extraction) Rita K Sari; Idris N Iskandar; S Priambodo; Regita Pramesti; Livia T Amalia
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 15, No 2 (2017): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

This study aimed to determine the yield and chemical content of teak extracts from hydrotropic extraction and larvalidal activity test against Aedes aegypti. The teak wood powder was extracted with urea (U) and natirum acetate (NA) solutions at 1M and 2M with physical treatment of magnetic stirrer (MS) and microwave (MS). The composition of chemical compound of extracts were determined by GC-MS. The larvicidal activity test were conducted on insted larvae of A. aegypti mosquito III. The results showed that the yield of NA extracts were higher (1.08-2.31%) than U extracts (0.72-1.68%). The increased of solvent concentration increased the extract yield. The physical treatment of MS produced a higher extract than MW. The NA extracts were dominated by acetic acid (16.53-40.21%), whereas the U extracts contained various dominant compounds. Both NA and U extracts contained tectoqinon, eugenol, farnesol, o-methoxyl benzene alcohol, methoxydeugenol, 3-penten-2-one, and tetracosahexaene with different levels. The U extracts were detected containing tectoqinon (0.66-1.79%), while the Na extract which was extracted with 1M NA and got MW treatment was detected contain tectoqinon (0.42%). The NA extracts were classified as active as larvacidal to A. aegypti, while U extracts were classified as inactive as larvacidal to A. aegypti.Keywords: Aedes aegypti, hydrotropic extraction, larvacidal, teak wood extract

Effect of Surface Density on the Fire Performance of Wood and Wood-Based Materials Anita Firmanti; Subyakto Subyakto; Bambang Subiyanto; Shuichi Kawai
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 9, No 1 (2011): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Surface density known as mass per unit area or as a product of density and thickness was analyzed as a key factor in predicting the fire performance of wood and wood based materials. Sawn timber of Mangium (Acacia mangium Willd) and Gmelina Arborea (Gmelina arborea Roxb.) in various thicknesses, manufactured particleboards and cement bonded particleboards of both species in various densities and thicknesses were used as the testing materials. Commercial particleboards, cement bonded particleboards and MDF were also tested. Boards were tested under ISO 5660 using cone calorimeter. Physical and mechanical properties were tested based on ASTM and JIS standards. The physical and mechanical properties of manufactured wood based panels could fulfil the JIS standard. Ignition time is affected by the surface density and effective surface area to the heat exposure of the boards. Boards reacted in different ways to the heat exposure but they needed similar time to the critical temperatures of 260 °C, in the similar surface density regardless of materials type. Surface density could be used as a key parameter in the fire resistant design process. The results of tested boards under ISO 5660 were about two third of those under JIS A 1304.Key words: cone calorimeter, fire resistant performance, surface density, wood, wood based materials.

Pengaruh Kombinasi Bambu terhadap Kualitas Oriented Strand Board (Effect of bamboo combination on the quality of Oriented Strand Board) Adiaman RI Purba; Apri H Iswanto; Irawati Azhar
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 14, No 1 (2016): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/jitkt.v14i1.352

Bamboo is a potential alternative material for wood based OSB. Evaluation of physical and mechanical properties of OSB from combined bamboo betung and bamboo tali was emphasized in the present research. Betung and tali bamboo were converted into strands with the length x width x thickness size of 7 cm x 2.5cm x 0.1cm, respectively. Strand were oven dried up to 7% of moisture content. Upon drying, strands wereblended with 5% isocyanat resin. After mat forming, furnish was pressed by hot press machine at 160 oC temperature for 5 minute and 30 kgcm-2 pressure. The prepared OSB was conditioned for 7 days at room temperature. The results showed that bamboo combination increased the physical and mechanical properties of board. T/TB/T was the best combination in this experiment. OSB properties improved when betung bamboo was applied on the surface. Overall, the properties of board satisfied the requirement of JIS A 5908 (2003) standard.Key word: betung bamboo, tali bamboo, isocyanate, OSB

Isolasi dan Karakterisasi Senyawa Kimia dari Kulit Batang Manggis (Garcinia mangostana Linn) Isolation and Characterization of Chemical Compound from Bark of Mangosteen (Garcinia mangostana Linn) Lia Destiarti; Ari Widiyantoro; Elvi Rusmiyanto; Maryati Maryati; Harlia Harlia; Ratu Safitri; Unang Supratman
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 7, No 2 (2009): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

The purpose of this research is to isolate and characterize chemical compound from bark of mangosteen. Bark of mangosteen was macerated with methanol. The extract from that process was fractionated with n-hexane, methylen chloride, and ethyl acetate. Ethyl acetate fraction was separated and purified by vacuum column chromatography, gravitation column chromatography, and preparative thin layer chromatography. The relative pure compound was afforded from ethyl acetate fraction of mangosteen bark (8.5 mg) resulting from 1.5 kg of mangosteen bark. The yellow amorphous powder of compound melts at 114 ~ 116ºC (uncorrected). The purity of compounds was tested by 1 and 2 dimension thin layer chromatography which gave one spot on TLC plate. The ultraviolet-visible (in CH3OH solvent) spectrum showed absorption maximum at 318 nm (sinamoyl group/band I), 258 (shoulder), and 243 nm (benzoyl group/band II). Addition of NaOH caused batochromic shift of band I and band II predicted as two hydroxyl at C-4’ and C-7, respectively. The infrared spectrum displayed absorption bands of OH stretching at 3436 cm-1, C-H stretching at 2920 cm-1, C=O stretching at 1631 cm-1, C-O-C stretching at 1094 cm-1, and C-H aromatics bending at 970-800 cm-1. A molecular ion in the FABMS at m/z 271.36 [M+H] + was consistent for the molecular formula C15H10O5. The 1H NMR spectrum showed characteristic resonances of a flavone. Based on the result of phytochemical test and analysis of the spectrum, it is predicted that the compound belongs to flavone, a kind of flavonoids which has hydroxyl at C-5, C-7, and C-4.

Distribution of Water Borne Preservative on Wood Preserved Using Full Cell and Empty Cell Processes Fauzi Febrianto; Adiyantara Gumilang; Anne Carolina; Fengky S Yoresta
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 12, No 1 (2014): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

This research focused on distribution of water borne preservative on woods preserved using full cell and empty cell processes. Retention, penetration, and durability of preserved woods against dry wood termite (Cryptotermes cynochephalus LIGHT) attacked were evaluated. Pine (Pinus merkusii) and sengon (Paraserianthes falcataria) woods were preserved using 5% Wolmanit CB (water soluble preservative) using full cell and empty cell processes. The results indicated that retention of preservative preserved with full cell process was higher than empty cell process. Copper penetration on sengon wood preserved using full cell process was much higher than empty cell process. Distribution of copper and chromium on wood preserved using full cell process evenly distributed through the wood both in pine and sengon woods. They were sharply decreased from outerpart to inner part of wood when preserved using empty cell process. The whole part of pine and sengon woods preserved by either full cell or empty cell processes strongly resistance against dry wood termite attacked. Quantitative analysis of active substance of preservative using atomic absorption spectroscopy (AAS) could detect the preservative in preserved wood more accurately compared using conventional method (retention and penetration tests).Key words: distribution pattern, durability, empty cell process, full cell process, water borne preservative

Ultra-Struktur Kayu Tekan Damar (Agathis loranthifolia Salisb.) dalam Hubungannya dengan Sifat Fisis Kayu Ultra Structure of Compression Wood of Agathis (Agathis loranthifolia Salisb.) and Its Relation to Physical Properties I Ketut Nuridja Pandit; Istie Sekartining Rahayu
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 5, No 1 (2007): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Compression-wood is one of the abnormalities phenomena found in softwood’s trunk. This abnormality has not been studied comprehensively yet as most of the research on normal trees. This research objective was to analyze ultra structure of Agathis compression wood cell walls and the relation to its physical properties. Wood samples were taken from compression wood in size of 0.5 cm x 0.5 cm x 3 cm. Ultra structure of cell walls characteristics were analyzed descriptively by using SEM image, while physical properties studied were green and air dried moisture content, density and specific gravity, and shrinkage. The results showed that the form of tracheid cells were changed cross sectionally; intercellular spaces occurred between round tracheid cells; the third layer of secondary cell wall (S3) of compression wood was not clearly distinct; and the angle orientation of microfibril increased along the longitudinal axis. The ultra structure differences led to different physical properties such as greater moisture content, density as well as shrinkage

Anatomical Properties of Flindersia pimenteliana F. Muell from Wondama Bay West Papua Renny Purnawati; Imam Wahyudi; Trisna Priadi
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 10, No 2 (2012): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Anatomical properties of Flindersia pimenteliana F. Muell wood from natural forest in Wondama Bay, West Papua was studied in order to analyze its general characteristic, anatomical structure and fiber quality. The microtome slides were prepared according to the Johansen's method, while the anatomical features observed according to the International Anatomist Wood Association (IAWA) List. The results showed that F. pimenteliana wood has decorative figure, white sapwood to pinkish and reddish brown heartwood, fine texture, straight grain, lustrous, good smell, moderately soft and light. The main characters of this species were growth ring indistinct, diffuse porous, simple perforation plate, vessels solitary and in radial multiples of 2-4 cells, inter vessel pits alternate, minute, vessel-ray pits with distinct borders, similar to inter vessel pit in size and shape,white deposit present in pores, axial parenchyma diffuse, scanty paratracheal and vascicentric, rays width 1-3 cells, prismatic crystals present in chambered axial parenchyma cells. Fiber length, diameter and wall thickness were 1,120.51, 19.22, and 2.66 μm, respectively. Fiber quality of F. pimenteliana could be classified into quality class II. Based on these properties, it could be recommended that this wood is suitable for wood craft, furniture, and cabinet work.Key words: anatomical structure, fiber quality, Flindersia pimenteliana, microtome slides

Menduga Modulus Geser dengan Memanfaatkan Modulus Elastisitas Contoh Uji Ukuran Pemakaian dan Bebas Cacat Predicting Shear Modulus Using the Elasticity Modulus of Full-Scale and Small-Clear Wood Specimen Indah Sulistyawati; Abdul Muhar Husin; Surjono Surjokusumo
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 3, No 1 (2005): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

To predict the elasticity modulus of wood, an assumption is made that all of deflection is due to the bending moment. Actually the total deflection of a beam made up of a bending and shear component. The composition of the bending deflection has EI as the bending stiffness factor and for the shear deflection has a GA as the shear stiffness factor, where E is the elasticity modulus, I is the moment of inertia, G is the shear modulus and A is the cross sectional area of a beam. The shear modulus of wood can be determined by using the true elasticity modulus of full-scale specimen test and the apparent elasticity modulus of small-clear specimen test of the beam with single load at mid-point for simply supported beam. From the comparison of them the shear modulus of wood can be obtained. The result of this research shown that the shear modulus of Acacia mangium is 1/17.45 multiplies by the elasticity modulus.

Mutu Papan Partikel Pelepah Salak Tiga Lapis Berperekat Asam Sitrat (The Quality of Citric Acid Bonded Three Layered Particle Board of Snake Fruit Frond ) Bangun Dwi Prasetyo; Ragil Widyorini; Tibertius Agus Prayitno
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 15, No 2 (2017): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Salacca (snack fruit) frond is a non-timber alternative for the production of composite boards. The study was aimed to determine the interaction between pressing time and shelling ratio on the quality of three layered particle board of salacca frond bonded with natural citric acid. Snack fruit frond composite boards of (25x25x1) cm3 were made at pressing temperature of 180 oC, specific pressure of 3 MPa, and target density of 0.8 g cm-3. A completely randomized factorial design was used with two factors, namely pressing times (10 and 15 minute) and shelling ratio of surface and core layer (10:90, 20:80 and 30:70%). Physical and mechanical properties of composite boards were tested based on JIS A 5908: 2003 standard. Results showed that the physical and mechanical properties were improved with increasing pressing time.The increase of shelling ratio between surface layer and core layer positively influenced mechanical properties, however negatively influenced dimension stability and moisture content. The optimal properties of three-layered snake fruit frond particle board were achieved with 15 min pressing time and 20:80% shelling ratio.

DAYA TAHAN GARIS REKAT LRF PADA KAYU LAMINA MANII TERHADAP SERANGAN RAYAP KAYU KERING The LRF Glue Line Durability of Manii Laminated Wood Against Dry wood Termite Adi Santoso; Jasni Jasni
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 1, No 1 (2003): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Lignin is one of the principal components constituting wood bulk, besides cellulose and hemi cellulose. It consists of poly-phenolic molecules, serving as a binding agent, which holds the wood cells together. Lignin is also credited with imparting rigidity or stiffness to the wood, rendering its body effectively resistant to the mechanical forces imposed on it. Considering and evaluating the specific attributes of lignin, an idea has come-up to utilize it as a binder or glue in the manufacture of particleboard, plywood, or other wood products.The lignin in the sulphate’s black liquor (known as Kraft lignin) has a strong affinity when being reacted with formaldehyde to form lignin formaldehyde adhesives; and to increase the bonding strength quality, the lignin is further co-polymerization with resorcinol to form lignin resorcinol formaldehyde (LRF) resins. The resin can be employed in the manufacture of particular glued wood products such as finger-jointed wood assembly and glue laminated lumber (glulam). The research was aimed to determine the optimum composition of mole ratio in LRF glue and its pressing duration in laminated wood manufacture for construction qualities with high durability on against dry wood termite. The adhesive was prepared by mixing the isolated lignin, resorcinol and formaldehyde at various mole ratios L : R : F ( 1 : 0.5 : 2; 1 : 0,7 : 2; 1: 0,9 : 2 and control) respectively, and the pressing duration was employed by 3, 6, 12 and 24 hours at room temperature. The research results showed that the higher the resorcinol content, the longer pressing time, the higher the mortality and the lower weight loss. The mortality reaches 91.67 % and weight loss 2.17 %.

Page 17 of 32 | Total Record : 316

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