This study examining study fungal resistance properties of five wood species using Kolle-flask method. The studied wood species include: ki hiur (Castanopsis acuminatissima), huru pedes (Cinnamomum iners), huru koja (Litsea angulata), ki kanteh (Ficus nervosa), and kelapa ciung (Horsfieldia glabra). Samples were grouped into inner part and outer part of logs as well as metal screwed and unscrewed. Results show that all of five studied wood species no matter parts of log are classified not-resistant (class IV). Weight loss of wood samples with the attached metal screw is higher in average than the unscrewed wood samples. The highest weight loss was recorded on the inner part of unscrewed huru pedes wood exposed to Pycnoporus sanguineus. While the lowest weight loss was found in screwed samples of the same species exposed to Dacryopinax spathularia. The metal screws were found corroded after the test and the highest screw weight loss was found on ki kanteh wood. Metal screw that attached on the inner part experienced lower eight lost than screws attached on the outer part of log.

The palm oil industry in the capacity of 100 thousand tons of raw material per year will produce about six thousand tons of palm shell waste. The solid waste is not optimal untilized as fuel boiler and pavers around the factory. This study aims to get quality palm shell biobriquettes from of treatment particle size palm shell and hydrolyc pressure. Procedure research include: natural drying palm shell, crushing of palm shell, powder filtering, mixing with 5% starch solution, printing and pressing, drying naturally biobriquette quality.The treatments used are palm shell particle size which includes 7 mesh, 16 mesh, 25 mesh, and the pressure hydrolyc covering 3 tons, 5 tons, 7 tons. Each treatment was replicated three times. The parameters tested include: moisture content, ash content, calorific value, carbon content, volatile matter content, density and compressive strength. The result research: moisture content is between 4.15 - 9.06%;. ash content is between 1.68 - 6.19%; the carbon content is between 7.57 - 19.55%; volatile matter content is between 70.49 - 81.95%; sulfur content of all negative; calorific value is between 4218.17 - 4442.34 cal/g; density is 0.26 - 5.36 kg/cm3 .between 0.69 - 0,87g/cm2 ; and compressive strength is between

In general, wood from plantation forests are dimensionally unstable, therefore, timber uses are limited. This paper observes dimensional stability of chemically densified fast-growing teak (JCT) and jabon woods. JCT and jabon woods were impregnated using a mixture of old teak sawdust extracts and resin. The resin used were vinyl acrylic and polyvinyl acetate in three concentrations : 8, 10, and 12% (w/v), and two compositions of resorcinol resin. Results show that in general, dimensions of the impregnated wood are more stable than non-impregnated wood. Wood impregnated with the mixture of teak extract solution and resorcinol resin shows better dimentional stability than other resins.

Preserving wood is one way to enhance its natural durability. The degree of wood protection achieved depends on the preservative impregnated in the wood and measured by its retention and penetration. Preservative retention is calculated based on the gravimetric system, while penetration is observed based on the colour differences after spot test. Preservative penetration pattern is observed visually and percentage is calculated conventionally. Digital image interpretation using Image-J software is one way to measure the preservative penetration. This paper studies the treatability of six wood species from West Java and Riau. Preservative penetration was interpreted both conventionally and digitally. Result shows hamirung, jaha and mahang putih wood species are classified into easy to preserve (class I), while bung bulang, pasang taritih and bira-bira wood species are classified as medium to preserve (class II). Digital image identification provides easier, faster and more accurate in inter preting preservative penetration than the conventional method.

Six wood species from West Java which are ki hiur (Castanopsis acuminatissima A.DC.), tunggeureuk (Castanopsis tunggurut), huru pedes (Cinnamomum iners Reinw.Ex Bl.), huru koja (Litsea angulata Bl.), ki kanteh (Ficus nervosa Heyne) and kelapa ciung (Horsfieldia glabra Warb) have been distillated by dry distillation at temperature 450°C-500°C for five hours in the retort distillation. Distillates from the dry distillation in form of charcoal, tar and liquid are calculated. The results exhibited charcoal quality of six woods meet the standards of Indonesia for charcoal and charcoal briquettes with calorific values ranging from 6743-6795 cal/g, fixed carbon ranging from 79.42 % - 82.37 %. Charcoal yield ranging from 27.43 % -33.55 % . Pearson correlation analysis on the lignin content and wood gravity to charcoal calorific value indicates that the lignin content has a significant correlation to the calorific value of charcoal

This paper studies the information on production technology of bio-oil from gelagah grass (Saccharum spontaneum Linn.) and its properties using fast pyrolysis. The variables used in this study are temperature 550 C and 600 C and size of samples which are 20, 40 and 60 mesh. The results showed that highest production of bio-oil attained from sample size 40 mesh with treatment at 550 C, with the following characteristics; yields of liquid was 30 88%, phenol 7.58, pH 2.62, specific gravity 1.1108 g/cm , heating value 25 29 MJ/kg and flame power was at slow level. Bio-oil produced by this process predominantly composed of acetic acid, phenols and dan 1-hydroxy 2-propanone.

Timber hauling has a main goal to remove timber from forestland to the wood processing industry or directly to consumers. The hauling should be managed efficiently, so that the smooth running of transport should be prioritized. Slip is a serious obstacle that must be anticipated when hauling using trucks. It can reduce labor productivity and increase cost of hauling. The experiment was conducted in April 2014 in the RPH Ciogong, BKPH Tanggeung, Cianjur KPH Perhutani Unit III West Java and Banten. The pur pose of research is to find out the use of auxiliary tools for reducing road slip in teak land hauling. The auxiliary tools were designed and manufactured in the workshop. The tools were then applied on the truck wheels in various slopes of slip. Results showed that: the average slip on slope class 0-8%, 9-15% and 16-25 % respectively 3.24 %, 6.11% and 7.58 % with each traction coefficient of 0.59, 0.44 and 0.36. The productivity of teak logs using the tools on slope class 0-8 %, 9-15% and 16-25% respectively 92.02 m3 .km3/hour, 89.07 m km/hour and 83.59 m km/hour and production, costs of corresponding teak logs are Rp 2640.01/m3 km3 Rp 2737.92/ m km and Rp 2917.27/m3 km3.