Nauli. The essential oil colected from leaves of plant by steam distilation of Cupressus benthamii a fresh and dry leaves for seven hours. Result shows that the dry leaves provide the highest yield (0.41%) with its properties of specific gravity 0.889, refractive index 1.481, solubility on ethanol 1:5, and acid value 3.8 mg KOH/g sampel. The chemical compound of cupressus oil was dominated by -pinene (17.6%), sabinene (8.59%), 4-ter pineol (6.56%), ? ? (5.12%). and – terpentin This paper studies the characteristic of cupressus oil (Cupressus benthamii Endl) from Forestry Research Institute Arboretum at Aek

This paper studies the physical and mechanical characteristics of the glued-laminated (glulam) beams made from small diameter of three fast growing species i.e. teak (Tectona grandis L.f), mangium (Acacia mangium Willd.) and trembesi/monkeypod (Samanea saman Merr.) using water based polymer isocyanate (WBPI) as a binder. Six plies of wood combination species were laminated into final dimension of 6 cm x 12 cm x 300 cm. Each laminate was graded using Machine Stress Grading (Panter, plank sorter) to determine its Modulus of Elasticity (MOE). Crosss-section of two type of glulam beam was 6 cm x 12 cm, arranged of various widths and based on values of laminate MOE. Results show that the average and range value of the glulam density were 0.658 g/cm and 0.557-0.821 g/cm , with the moisture content of 14.6% (13-16.8%). The average of the glulam modulus of elasticity and modulus of rupture were 75.51(37.016-12.0446) kg/cm and 494 (145-750) kg/cm respectivelly The glulam made from teak has better MOE and MOR performances compared to those of mangium and trembesi. In general, the results showed that almost all of glulam beams tested meet requirement of JAS (Japanese Agricultural Standard) 2007 for structural glulam in moisture content, MOE, MOR, and shear strength. The glulam qualities can be classified into E65-E95-F225-F270, except for several species combination beams. Based on the strength classified and the ratio of S/W, the glulam can be used as a construction material except glulam teak-trembesi (preserved or unpreserved) and the unpreserved trembesi-trembesi. The three types of glulam can be utilized for the lightweight construction.

This study aims to determine the resistance of 20 wood species against subterranean termites (Coptotermes curvignathus Holmgren) and dry wood termites (Cryptotermes cynocephalus Light). The test method of subterranean and dry wood termites refers to the SNI 01-7207-2006. Parameters observed for determining resistance class to subterranean and dry wood termites are the percentage of wood weight loss and the survival percentage of termites. Besides that, a subjective observation an severity of subterranean and dry wood termites attacks were also conducted. Results show that the resistance of 20 wood species against subterranean termites are as follow: class II (3 wood species), class III (2 wood species), class IV (13 wood species) and class V (2 wood species). The resistance to dry wood termites of the 20 wood studied species can be grouped as follow: class I (4 wood species), class II (5 wood species), class III (8 wood species) and class IV (3 wood species).

Galam wood (Melaleuca leucadendra L.) is traditionally used for building materials, charcoal and fire wood. Currently, the tree bark remains unused, wasted or burned. The tree bark is potentially developed for particleboard manufacture. This paper studies the properties of particleboard made of galam tree bark. Galam bark pieces with dimension of 2 x 4 x 6 cm were bonded with Urea Formaldehyde (UF) in three different amounts: 11%, 13% and 15% of the total weight. The mixture was hydraulically pressed in 15 kg/ cm and temperatures of 110-120°C for 15 minutes prior to air dry. The physical and mechanical properties were tested according to the Indonesian National Standard 03-2105-2006. Results show that moisture content of the boards vary between 9.5 - 12.30% and the thickness swelling ranges between 2 - 11.35%. Boards density are about 0.68 - 0.77 g/cm , Modulus of Elasticity (MOE) of 204.98 - 11210.91 kg/cm and Modulus of Rupture ranges between 40.49 - 104.23 kg/cm . The screw withdrawal strengths are 44 - 84 kg and internal bond varies from 0.27 - 0.65 kg/cm . Based on the physical and mechanical properties, the particleboard made of galam tree bark mixed with 15% of UF meet the Indonesian National Standards 03-2105-2006.

In Indonesia, generally undertaken by cutting the main trunk and logging in natural forests is along the clear boles skidding the trunk to the landing point T examine skidding performance of an alternative method, i.e. . his tree papers length logging the stem above the first branch diameter of 20 cmwhich conducted by cutting off up to minimum which is manifested by the productivity and skidding cost method practiced . The was in four areas of Licency Natural Forest Concessionary . esults show that the productivity ranged from managed by intensive sylvicultural system R log skidding 21.127 – 23.893 m³/hour with average of 22.217m³/hour skidding . skidding cost depending on distance Meanwhile, of tree length methods r ed fromRp 24,852.36 - Rp 29,318 49/m with average of Rp 28,628.10/m with skidding ang distance ranged from 100 m to 225 m3

Research of liquid smoke from 3 species of bamboo has been conducted by using modified drum furnace. The purpose of this study is to determine the chemical components and other properties of liquid smoke. The results showed that the yield of liquid smoke 3 types of bamboo ranged from 5.00 to 24.00%, a pH of 2.70 to 3.36 has been standardized Japan; gravity of 0.99 to 1.03, acetic acid 31.37 - 83.59%, from 1.37 to 2.07% methanol and 0.56 to 1.24% total phenol.Acetic acid, methanol and total phenol liquid smoke test results of black bamboo has the highest value, followed by liquid smoke and spotted bamboo lowest in the liquid smoke bamboo betung.