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INDONESIA
Jurnal Ilmu dan Teknologi Kayu Tropis
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
 28   29   30   31   32 
Optimasi Aktivasi Arang Aktif dari Arang Hidro Tempurung Buah Kelapa Sawit Menggunakan Metodologi Permukaan Respon (Optimization of Activated Carbon from Oil Palm Shell Hydrochar Using Response Surface Methodology) Ismail Budiman; Dede Hermawan; Fauzi Febrianto; Subyakto Subyakto; Gustan Pari
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 17, No 1 (2019): 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.v17i1.457

Abstract

In this study, activated carbon was prepared using hydrochar derived from oil palm shell through hydrothermal carbonization (HTC), and activated by 5% kalium hydroxide (KOH). The activation process was carried out using a temperature of 700 °C - 800 °C, with activation time of 60-120 minutes. The parameters of the activation process were optimised by response surface methodology (RSM). The central composite design (CCD) is used to determine the effect of activation temperature and activation time on some responses i.e. proximate analysis, ultimate analysis, methylene blue number, iodine number, electrical conductivity, yield percentage, and some gas pollutants adsorption. The results showed that almost all of activated charcoal met the technical standard of activated charcoal of SNI 06-3730-1995 for moisture content, ash content, volatile matter, fixed carbon, iodine number, and methylene blue number. The optimum conditions for the activation process involving the response observed were at 787.85 °C for 116.52 minutes
Keteguhan Rekat Kayu Lapis Sengon Menggunakan Perekat Lignin-Formaldehida dengan Dua Macam Bahan Pengisi (Bonding Strength of Sengon Plywood Using Lignin-Formaldehyde Adhesive with Two Types of Fillers) Achmad Supriadi; Adi Santoso; Rohmah Pari
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 17, No 2 (2019): 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.v17i2.466

Abstract

Various efforts have been done to reduce the cost, such as finding a suitable mixture of fillers in the adhesive formulation. The aim of this study was to determine the characteristic of lignin-formaldehyde (LF) adhesive and the effect of different content of coconut shell flour and kaolin in the adhesive of lignin on the bonding strength of sengon plywood. Coconut shell flour and kaolin filler content were varied, i.e. 0%, 10%, 20%, 30%, and 40%. The plywood of (20x20x1.5) cm3 size was prepared using a liquid lignin-formaldehyde (LF) with a glue spread of 170 g m-2 surfaces. Bonding strength of plywood was tested to determine the quality of sengon plywood. The results showed that LF adhesive was appeared as a reddish-brown liquid and there were no foreign substances, solid resin content ranges from 31.85 to 35.68%, viscosity of 1.2 poise, acidity (pH) of 11.5, and gelatinized time ranges from 24.20-25.96 minutes. The type and filler content had a significant effect on the bonding strength of sengon plywood. Increasing of the filler content tended to increase the bonding strength of sengon plywood to 30%. The bonding strength of sengon plywood produced using the content of either coconut shell or kaolin flour fillers up to 30% complied with German Standards requirement. The maximum bonding strength value was obtained on adhesives using both types of fillers as much as 10 %.
Antimicrobial and Gtase Inhibitory Activity of Crude Methanol Extracts of Plants from Java and Kalimantan Harlinda Kuspradini; Irmanida Batubara; Tohru Mitsunaga
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 8, No 1 (2010): 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.v8i1.508

Abstract

Some methanol extracts from Java and Kalimantan plants species were evaluated for in vitro anti-streptococcus sobrinus and Glucosyltransferase (GTase) inhibitory activity. The extracts were screened for anti-S. sobrinus and its related enzyme activity by broth dilution method.   IC50     and GTase were determined wherever activity was notice. The results revealed that the amount of phenolic and flavonoid compound varies from different plant species and the type of plant material (woody or herb). Out of 24 plant species, 9 species from methanol extracts showed good antibacterial activity in a range at 10 µg ml-1≤ IC50 ≤ 100 µg ml-1. The Intsia palembanica extract is the most antimicrobial. However, only 4 plants could exhibit GTase activity in a range at 18 µg m1-1 ≤ IC50  ≤50 µg ml-1. The most active extract is Psidium guajava (15.33 µg ml-1). The result of the present study suggests that some Indonesian plant can prevent dental caries and periodontal diseases, since it demonstrated antimicrobial and GTase inhibitory activity against S. sobrinus.
Keawetan dan Stabilitas Dimensi Papan Partikel Hibrida Bambu-Kayu dengan Perlakuan Steam dan Perendaman Panas (Durability and Dimensional Stability of Hybrid Particleboard of Bamboo-Wood with Steam and Hot Water Immersion Treatment) Wahyu Hidayat; Intan F Suri; Rahmat Safe’i; Christine Wulandari; Wisnu Satyajaya; Indra G Febryano; Fauzi Febrianto
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 17, No 1 (2019): 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.v17i1.462

Abstract

Development of bamboo as an alternative material for particleboard production has been increasing due to its fast growth, high productivity, high strength property, and light weight. The aims of this study were to determine the effects of particle pre-treatment on the durability and dimensional stability of particleboard. Particles were made from betung (Dendrocalamus asper)/B, jabon (Anthocepallus cadamba)/J, and sengon (Falcataria moluccana)/S pretreated by steam and hot water immersion. Five combinations of particleboard consisted of three homogenous boards (B-B-B, J-J-J, S-S-S) and two hybrid-particleboards (J-B-J, S-B-S) were manufactured using urea formaldehyde of 10% resin level and target density of 0.6 g cm-3. Durability of particleboards was evaluated by grave-yard test and the dimensional stability of particeboards was determined by measuring thickness swelling during a wet-dry cyclic test. The results showed that pre-treatment on particles significantly improved the durability and dimensional stability of the boards, showing lower weight loss and thickness swelling than control boards. Homogenous wood particleboards (J-J-J and S-S-S boards) showed higher weight loss and thickness swelling than bamboo particleboard (B-B-B), combining wood and bamboo particles into hybrid-particleboards (J-B-J and S-B-S boards) has improved the durability and dimensional stability of the boards.
Bentuk Ligulate Extension Beberapa Jenis Kayu Andi D. Yunianti; I Ketut N. Pandit
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 8, No 1 (2010): 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.v8i1.513

Abstract

The key difference between hardwood and softwood is lies on the presence of the vessel element on the hardwood and its absence on the softwood. Many researches have been done especially focused on vessel’s shape, volume, forms as well as on pit of vessel. However, few of those research focused on the vessel’s ligulate extensions. This research was study the shape of ligulate extensions on acacia, teak, gmelina, and sungkai woods to examine samples from maceration. The results revealed that ligulate extension shapes were diverse within one wood species. Furthermore, wood samples that coming from same part are still varied in its ligulate extension. Therefore, shapes of ligulate extension are unrecommended as a mean of wood identification. It is presume the variation of ligulate extension is highly related to the vessel functions as a food transporter, mechanical function as well as the presence of earlywood and latewood.
Reduction of Formaldehyde Emission from Phenol Formaldehyde Treated Oil Palm Wood through Improvement of Resin Curing State Mohamad Amarullah; Edi S. Bakar; Zaidon Ashaari; Mohd. H. Sahri; Fauzi Febrianto
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 8, No 1 (2010): 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.v8i1.504

Abstract

Oil palm wood (OPW) has several imperfections, and impregnation with low molecular- weight phenol formaldehyde resin through a modified compreg method can practically enhance these properties. The treated OPW, however,  releases  a considerable  amount  of free formaldehyde and thus is unhealthy for the human being. To make it applicable  for indoor material, formaldehyde emission (FE) should  be lowered  to 0.1 ppm  or lower. The FE level of the treated OPW was reduced from 0.3 to 0.1 ppm or lower by improving the resin curing state through two approaches, i.e. modifying the hot pressing compression schedule during the process and adopting an extended drying after the process. It is acknowledged that the extended drying gave more effect on the FE reduction than that of modifying hot-pressing schedule. The combination pressing  schedule  of 12.5%®25%®50% and extended drying of 48 h emits the lowest, safe formaldehyde of 0.08-0.10 ppm, which is considered  safe  according  to  American  National  Standard Institute (ANSI) standard. The improving resin curing state through modifying the hot pressing schedule and adopting extended drying could be used as a practical  way to reduce the FE level of the treated OPW to a safe level suitable for various furniture and indoor applications.
Distribusi, Retensi, dan Penetrasi Bahan Pengawet Ekstrak Daun Tuba (Derris elliptica Benth) pada Kayu Kemiri dan Kayu Agathis (Distribution, Retention, and Penetration of Tuba Leaves Extract (Derris elliptica Benth) on Aleurites moluccana and Agathis Wood) Syahidah Syahidah; Andi D Yunianti
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 17, No 2 (2019): 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.v17i2.467

Abstract

Wood preservation is carried out to increase the service life of wood with low natural durability. Factors such as wood structure, preservatives, and methods of preservation influence the preservation processes. The aim of this study was to evaluate retention, penetration, and distribution of tuba (Derris elliptica) leaves extract into the candlenut wood (Aleurites molluccana) and agathis (Agathis sp.) wood structures. The wood samples were treated with hot and cold soaking. The duration of hot soaking were 3, 5, and 7 hours, while for cold soaking were 3, 5, and 7 days. The result showed that the highest retention of extract was achieved by cold soaking for 7 days at 9.4 kg m-3, and the lowest retention was achieved by hot soaking for 3 hours at 1.9 kg m‑3. The highest penetration occured by cold soaking for 7 days at 8.08 mm and the lowest was that with hot soaking for 3 hours at 2.81 mm. However, the distribution of the extract in the agathis wood structures could not be detected by stereo microscope. In the the case of the candlenut wood, the extract was distributed in the parenchyma cell.
Sifat Anti Jamur dari Ekstrak Biji Pinang (Areca cathecu) dan Daun Saga (Abrus precatorius) Anis S. Lestari; Titik Kartika; Deni Zulfiana; Maya Ismayati Maya Ismayati
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 8, No 1 (2010): 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.v8i1.509

Abstract

This research purposed to define effect of Pinang (Areca cathecu) seed and Saga (Abrus precatorius) leaf extract against wood decay fungi (Trametes versicolor and Fomitopsis palustris). To obtain active compounds, saga leaf and seed of pinang were extracted with methanol and evaporated by vacuum evaporator. To conduct antifungal test, PDA medium that had been mixed with crude extract of pinang or saga by comparison of 1:1 (w/v) was used. The examination fungal growth was based on its radius colony was conducted for 8 days. Saga leaf extract has higher antifungal activity against T. versicolor and F. palustris than pinang seed extract. Inhibition percentage of fungal growth by saga leaf extract achieved 100%. Based on this research, pinang and saga could be recommended forfurther research as one of biological controlagent.
Fiber Saturation Point of Several Indonesian Lesser Known Species Imam Wahyudi; Arif R. Harijadi
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 8, No 1 (2010): 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.v8i1.515

Abstract

Fiber saturation point (FSP) of several Indonesian commercial wood species was studied comprehensively. Five wood species namely sengon (Paraserianthes falcataria), gmelina (Gmelina arborea), nangka (Arthocarpus heterophyllus), manii (Maesopsis eminii), and mangium (Acacia mangium) from plantation areas closed to Bogor Agricultural University (IPB) campus were used as the sample. From each species, one normal tree was selected then cut, and one hundred and twenty small healthy blocks of (1 x 1 x 0.5) cm3were extracted randomly and utilized for specific gravity (SG) and wood shrinkage -green to air dry and to oven dry conditions- measurement. FSP was then measured as a ratio of total volumetric shrinkage and the SG. It was showed that FSP was affected by species namely extractive content. In all species studied, average value of FSP was below 30%. FSP of sengon, gmelina, nangka, manii, and mangium in average was 26.41%, 16.92%, 14.49%, 22.31%, and 23.94%, respectively.
Curing Behavior of Resorcinol Formaldehyde Resin Adhesives in Mangium and Pine Woods Bonding System under Various Curing Times Eka M. Alamsyah; Masaaki Yamada; Kinji Taki
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 8, No 1 (2010): 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.v8i1.505

Abstract

Effects of room-temperature curing time on the curing behavior of resorcinol formaldehyde (RF) resin adhesives by using thermo mechanical analysis spring method in relation to the mangium (Acacia mangium) and pine (Pinus merkusii) woods bonding system were examined. Total amount of liquid resin adhesives that inserted into the small wire spring was 10 mg for each curing time parameters. Results showed that the curves of modulus of elasticity (E’) from resin adhesives that cured for 1 month, 2 months and 3 months was almost flat from room temperature to 200°C. By far E’ curve of resin adhesives that cured for 3 months did not changed and adhesive predicted had cured completely. Results further showed that in A. mangium and P. merkusii bonding system all laminates bonded with RF in room temperature at least 1 month curing time is required to meet high bond strength with minimally 60 percent wood failure as one of requirements of good bonding performance classification.

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