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Jurnal Ilmu dan Teknologi Kayu Tropis
ISSN : -     EISSN : 16933834     DOI : -
Core Subject : Agriculture,
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 284 Documents
Aplikasi Isotop δ13C dan δ18O untuk Lacak Balak Kayu Jati (Tectona grandis Linn.f.) di Jawa Application of Isotopes δ13C and δ18O for Teak Wood (Tectona grandis Linn.f.) Timber Tracking in Java Kholik, Agus; Djiono, Djiono; Siregar, Iskandar Z; Siregar, Ulfah J; Karlinasari, Lina; Yunanto, Tedi
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 7, No 1 (2009): Jurnal Ilmu dan Teknologi Kayu Tropis
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Abstract

Tracking the origin of Teak timber and its wood product is possible to be carried out using stable isotopes fingerprinting.  To enrich the available variation patterns, Teak woods samples were collected from nine Forest Management Units (FMUs) representing all provinces and Teak centres in Java.  Mills from all part of woods were mixed for analyses.  The mills were burned under vacuum in a reactor system at 1200oC for 2 h, the resulting clean CO2 was transferred to the mass spectrometer to determine its isotopic composition of δ13C and δ18O.  The generated data was then analysed using multivariate analysis.  The results showed that isotopes analysis grouped Teak populations in Java intoWest Java population and mixed Central-East Java population.  To consider wood as material for fingerprinting traded forest product, a refinement on method should be done.
Potential of Fungus Metarhizium brunneum Petch as Bio Insectisides to Control Termite Macrotermes gilvus Hagen in Castor Plantation Sayuti, Muhammad; Santoso, Teguh; Harahap, Idham S; Kartosuwondo, Utomo
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 9, No 1 (2011): Jurnal Ilmu dan Teknologi Kayu Tropis
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Abstract

One of the important pest of castor plant (Jatropha curcas L) in Indonesia is termite Macrotermes gilvus. While entomopathogenic fungus Metarhizium brunneum has been proven effective against this termite and the subterranean termite M. gilvus in the laboratory, the performance of the fungus in the field need to be studied. The aims of the research are to investigate the cruising distance and colony population of M. gilvus before and after application of M. brunneum. Triple mark recapture technique has been used to predict the termite colony population size. The suspension of fungi at density 1,21x106 conidia ml-1 was poured at each experimental station (150 ml per station). The result showed that in block I (15,210 m2), block II (5,700 m2), block III (27,000 m2); 8, 1 and 15 termite colonies have been detected respectively from which, 150,388; 59,219; and 149,459 individual were found. In block I, the termites cruised as far as 140,5 m, as compared to 140 m in block III. In all blocks, we noted the significant decrease of termite population after application of M. brunneum, from initial population 359,066 to 15,015 individual.Key words: bio-control agents, entomopathogenic fungi, Jatropha curcas, Macrotermes gilvus, Metarhizium brunneum, size of colony
Aktivitas Antirayap Ekstrak Daun Orthosiphon sp., Morinda sp., dan Carica sp. Azis, Abdul; Prayitno, Tibertius A.; Lukmandaru, Ganis; Listyanto, Tomy
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 13, No 2 (2015): Jurnal Ilmu dan Teknologi Kayu Tropis
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Abstract

Rayap adalah agen perusak kayu paling agresif dan menyebabkan banyak kerusakan pada perumahan. Pencegahan serangan rayap dapat dihindari dengan menggunakan  bahan pengawet alami berasal dari tumbuhan. Penelitian ini bertujuan (1) mendeteksi senyawa yang terkandung dalam ekstrak daun kumis kucing (Orthosiphon sp.), mengkudu ( Morinda sp.) dan pepaya (Carica sp.) juga menentukan rendemen ekstrak menggunakan pelarut yang berbeda (etanol- toluena, heksana, etil asetat, etanol dan air panas) (2) menguji dan menentukan aktifitas menolak (repellent) yang  diperoleh  dari  setiap  ekstrak  terhadap  serangan  rayap  kayu  kering  (Cryptotermes  sp.). Metabolit sekunder aktif dideteksi dengan reaksi kimia. Larutan ekstrak diteteskan pada kertas saring dan dikeringkan pada suhu 60°C selama 3 jam. Sampel diuji ke rayap selama 4 minggu. Hasil menunjukkan bahwa rendemen ekstrak tertinggi diperoleh dari ekstraksi dengan air panas kumis kucing, mengkudu dan pepaya yaitu : 27, 8%, 26,71% dan 34,06% secara berurutan. Rendemen ekstrak terendah diukur dalam ekstrak larut heksana (kumis kucing : 4,40% dan mengkudu : 4,81%). Dengan reaksi kimia, senyawa aktif dideteksi dalam semua tumbuhan kecuali alkaloid. Alkaloid dideteksi paling banyak dalam ekstrak pepaya. Ekstrak pepaya larut etil asetat menunjukkan  tingkat  kerusakan  terendah  sedangkan  tingkat  mortalitas  rayap  tertinggi  diamati dalam ekstrak mengkudu larut etanol. Ekstrak pepaya larut etil asetat menunjukkan konsistensi aktifitas yang bagus baik terhadap mortalitas rayap maupun pengurangan berat pada bahan yangdiuji sehingga dengan demikian dapat diaplikasikan pada penelitian berikutnya dengan konsentrasi yang lebih tinggi.
Antifungal Activity of Faloak (Sterculia comosa Wallich) Extractives Ranta, Fabianus; Nawawi, Deded S; Pribadi, Eko S; Syafii, Wasrin
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 10, No 1 (2012): Jurnal Ilmu dan Teknologi Kayu Tropis
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Abstract

Faloak (Sterculia comosa Wallich) is a specific species of dry land that has potential antifungal. This study aims to determine the toxicity of barks, leaves, and seeds extracts as an antifungal, and to identify its bioactive compound. The extracts were prepared by multi stage maceration method. Antifungal activity was tested by agar well diffusion method, and minimum inhibition concentration (MIC) and minimum fungicide concentration (MFC) by two-fold serial dilution method were measured. Bioactive compound of active fraction were identified by Liquid Chromatography Mass Spectroscopy (LCMS), Fourier Transform Infrared (FTIR), and Nuclear Magnetic Resonance (NMR). Results showed that the diethyl ether (DE) fraction of seeds is more effective in inhibiting of Candida albicans growth, than the other fractions. Subfraction of DE7 has a higher potency in inhibiting the growth of of Candida albicans. Based on the analysis by LCMS, FTIR and proton NMR, the DE7 sub fractions contain 3-hydroxyoctadecanoic acid (C18H36O3), which is suggested as a mainly compound responsible for antifungal activity.Key words: antifungal, Candida albicans, extractive, Sterculia comosa
PEMANFAATAN LANGSUNG SERBUK KULIT KAYU AKASIA SEBAGAI PEREKAT PAPAN PARTIKEL Direct Utilization of Acacia Bark Powder as Adhesive for Particleboard Subyakto, Subyakto; prasetya, Bambang
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 1, No 1 (2003): Jurnal Ilmu dan Teknologi Kayu Tropis
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Abstract

Many studies have been done on the utilization of tannin from acacia bark obtained through extraction process for wood composites adhesive. In this experiment, powder of acacia bark was used directly for particleboard adhesive without extraction process to save cost and production-processing time.  Acacia (Acacia mangium) bark was powdered into 60 mesh and mixed with wood particles of sengon (Paraserianthes falcataria) with size of 15 mesh. The compositions of wood particles: bark was varied as follows 50:50, 60:40, 70:30, 80:20. Water and paraformaldehyde were added to the mixture. The matt was hot pressed at 180ºC at pressure of 10 kg/cm2 for 15 minutes. The panels were tested for their physical and mechanical properties in accordance with JIS A 5908.The results shown that some physical and mechanical properties of the board with composition of 60 : 40 were met the JIS A 5908 standard. Further studies are needed to improve all the particleboard properties to meet the standard
Modifikasi Alat Pelengkung Kayu Skala Pilot dengan Menggunakan Pemanas Modification of Pilot-scale Wood Bending by Heating Elements Darmawan, Teguh; Jayadi, Jayadi; Sudijono, Sudijono; Wahyuni, Ika; Amin, Yusuf; Dwianto, Wahyu
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 4, No 1 (2006): Jurnal Ilmu dan Teknologi Kayu Tropis
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Abstract

 This paper deals with manufacturing and modification of pilot-scale wood bending machine by heating elements. The machine has specifications as follows: 1000 mm width; 1305 mm height; 430 mm and 470 mm radius of upper part and bottom part of bent plates, respectively; and a manual stick pressure with 870 mm length. The upper part and bottom part of bent plates are equipped with heating elements, which the maximum of temperature is arranged to 200°C by the electric force of 220V/2000 watt. Left and right sides of bent plates are covered by 1150 mm x 950 mm insulation board to maintain the heat. From the temperature measurement, the heating plates were reached 50°C in 2.5 minutes, 100°C in 9.5 minutes, and 180°C in 28 minutes. The modified machine has successfuly bent Acacia solid wood with dimensions of 1100 mm(L) x 50 mm(T) and 10 mm, 20 mm, and 30 mm in thickness (R).
Steaming Effect on Natural Durability of Bamboo Oriented Strand Board against Termites and Powder Post Beetle Febrianto, Fauzi; Purnamasari, Intan; Arinana, Arinana; Gumilang, Adiyantara; Kim, Nam H
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 11, No 2 (2013): Jurnal Ilmu dan Teknologi Kayu Tropis
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Abstract

The objective of this research was to evaluate the resistance of bamboo oriented strand board (BOSB) prepared from steamed and non-steamed strands of five (5) bamboo species against subterranean termite (Coptotermes curvignathus), dry wood termite (Cryptotermes cynocephalus), and powder post beetle. The five bamboo species were betung, andong, ampel, hitam, and tali. In steaming treatment, bamboo strands were steamed in autoclave at 126 °C and 1.4 kg cm-2 pressure for 1 h prior mixing with adhesive. Strands were bonded into BOSB by the use of commercial Phenol formaldehyde (PF) adhesive at 10% (w/w) of oven dried strands. The resistance of BOSB against termite was done based on SNI 01.7207-2006 procedures and requirement. The results indicated that the resistance of BOSB against termites was significantly affected by bamboo species and steam treatment. The resistance of BOSB prepared from steamed bamboo strands against C. curvignathus and C. cynocephalus was higher than that of non-steamed bamboo strands particularly that of ampel bamboo strands. The powder post beetle was identified as Anobium sp. Bamboo species and strands steaming did not significantly influence the resistance of BOSBs against Anobium sp.Key words: bamboo, dry wood termite, oriented strand board, powder post beetles, subterranean termite
Campuran Lateks Karet Alam-Stirena dan Poliisosianat sebagai Perekat Kayu Lamina Blends of Natural Rubber Latex-Styrene and Polyisocyanate for Laminated Wood Adhesive Yulianto, Dede H; Hermiati, Euis
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 6, No 2 (2008): Jurnal Ilmu dan Teknologi Kayu Tropis
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Abstract

Each adhesive has its own strengths and weaknesses due to its bond strength, or its resistance to stress, heat, moisture and organisms.  Blending of several adhesives could combine properties of each.  Besides, it might reduce adhesives prices as well. In this research Natural Rubber Latex-Styrene (NRL-St) was blended with Polyisocyanate (PI) or API (Aqueous Polymer Isocyanate) adhesive. The aim of this research was to study the effects of compositions of adhesive blends on adhesive properties, and the effects of composition of adhesive blends and pressing time on bond strength of laminated wood (Acacia mangium). Blending compositions of NRL-St/PI were 100/0, 80/20, 60/40, 50/50, 40/60, 20/80, and 0/100. Physico-chemical properties of these blends of  adhesives, including solid content, pH, viscosity and mixtures homogenity were analyzed. Blends of NRL-St with PI adhesive had total solid contents range from 42.39 to 50.58%, pH from 7.45 to 7.98, and viscosity from 3506 to 5661 cp. Results of this study showed that optimum composition of blends of NRL-St and API adhesives for producing laminated wood of Acacia mangium was 50/50 (w/w).  At this composition the shear strength of laminated wood was 7.06 MPa, while delamination ratio in cold and boiling water were 0% and 4.89% respectively.  These values could meet Japan Agriculture Standard (JAS) for laminated wood (shear strength > 5.4 MPa and delamination ratio < 10%).  Optimum pressing time for producing laminated wood using API adhesive as well as blends of NRL-St/API (50/50) was two hours.
Characteristics Ultrasonic Waves Velocity and Anatomical Properties of Tapping Pine Jamilah, Maryam; Karlinasari, Lina; Sadiyo, Sucahyo; Santosa, Gunawan
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 13, No 1 (2015): Jurnal Ilmu dan Teknologi Kayu Tropis
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Abstract

Non-destructive testing based on sound wave propagation has been used widely to estimate wood quality of standing trees. The aim of this study was to evaluate the characteristics of the sound wave velocity in relation to pine resin productivity and resin intercellular frequency and diameter. The samples were 72 trees consisted of 36 trees which were tapped by the quarre method and 36 other trees were tapped with addition of stimulants. The speed of sound waves propagation was measured by SylvatestDuo for radial direction and longitudinal. The tapping position was determined refering to the wind direction. The resin productivity was twice for tapping with stimulant comparing to the control. The highest resin productivity was 87.31 g per harvest for tapping with stimulant and the lowest (39.86 g per harvest) for control. Statistically, there was not significant difference in sound speed for tapped position as well as for measurement before and after tapped of both radial and longitudinal testing, as well as for the anatomical properties of both of treatments. A high positive correlation was found between resin productivity and intercellular frequency for both treatments (r>0.80), however, there was not significance correlation between resin productivity and other parameters.Keywords: Pinus merkusii, resin tapping, sound wave propagation
Stabilitas Fisikokimia dan Sifat Antipenuaan Kulit Formula Krim Berbahan Aktif Alami (Physicochemical stabilities and Skin Antiaging Properties of Bioaktive-based Cream Formulas) Sari, Rita K; Wistara, Nyoman J; Nawawi, Deded S; Meisaroh, Nopen; Wientarsih, Ietje; Agungpriyono, D R; Sutardi, L N; Subangkit, Mawar; Juniantito, Vetnizah
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 15, No 1 (2017): Jurnal Ilmu dan Teknologi Kayu Tropis
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Abstract

 The purpose of this study was  to analyze the physicochemical stabilities  and in vivo antiaging  properties of the cream formulas of F1, F2, and F3 which contained the active compound of 0.1% 0.18, and 0.36%, respectively. The active compound was the combination of  ethyl acetate fraction of  Toona sinensis, Centella asiatica, and Acacia mangium  leaf (1:2:1). For physicochemical stability tests (color, odor, acidity, and antioxidant activity), the creams were stored for 21 days in the refrigerator, room temperature,   and extreme temperature (±40 ⁰C). For in vivo antiaging test,  the mice skin  were smeared with cream and UV irradiated for 15 minutes per day. After two and four weeks, the mice skins were  biopsied. The results showed that the physicochemical properties of creams stored in the refrigerator were  stable. The storage of creams at room and  extreme temperature decreased the physicochemical properties.  The application of cream formulas on mice skin after two to four weeks were able to increase the thickness of epidermis, but has not been able to increase the collagen skin of mice.Keywords: Acacia mangium, Centella asiatica, ethyl acetate fraction of leaf, physicochemical and antiaging properties of cream, Toona sinensis

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