This research was conducted to investigate the linear expansion and resistance properties of a composite board (com-ply). This board was made of medium-density fiberboard (MDF) laminated using avocado (Persea americana), mahogany (Swietenia mahogani), and pine (Pinus merkusii) veneers. These three types of veneers were laminated on both surfaces of the MDF using adhesives, namely, epoxy and isocyanate. Glue (250 g･m −2 ) was spread on the surface, followed by cold press for 3 h with an applied pressure of 15 kg･cm −2 . The research result revealed that com-ply exhibited an increased dimensional stability compared with MDF, indicated by reduction in water absorption, thickness swelling, and linear expansion. The com-ply made of the pine veneer and isocyanate adhesive exhibited high density, water absorption, thickness swelling, and screw withdrawal load. The com-ply that exhibited the strongest resistance to drywood termite attacks was the one made of the mahogany veneer and isocyanate adhesive. Moreover, the com-ply that exhibited the biggest weight loss (3.6 %) was made of the pine veneer and epoxy adhesive. The results of this research may facilitate in manufacturing com-ply using the selected veneer and adhesive without the application of hot press.

This research presents an improvement of the physical and mechanical properties of composite board (com-ply) made of Oriented Strand Board (OSB) coated with wood veneer of Pine (Pinus merkusii), Avocado (Persea Americana) and Mahogany (Swietenia mahogany). 1.5 mm thick veneers of those three wood types were adhered to the surface of OSB using two adhesive types: epoxy and isocyanate. The adhesive with the glue spread of 250 g m -2 applied using single glue line was spread and then cold pressed with the pressure of 15 kg cm -2 for 3 hours. The research result showed an improving dimension stability of com-ply, but not found on all parameters of physical property test. The moisture content seemed to be influenced by the com-ply type, yet not related to its thickness swelling, water absorption and linear expansion. The exception took place in the parallel linear expansion when immersed for 2 hours. The highest to the lowest increases of MOE and MOR were consecutively found on OSB coated with wood veneer of Pine, Mahogany and Avocado. However, the increases were statistically insignificant. The highest increasing screw hold power was found at the com-ply type AE (avocado veneer and epoxy adhesive) that was by 28%.

Wood quality modifications have the potential to degrade the wood’s chemical components, especially those using heat treatment. In fact, wood quality improvement should be identical with the durability improvement and the other specific purposes, such as fixation improvement of preservative materials. This research was aimed to examine changes in chemical components and durability of Samama wood gradually impregnated with boron, methyl methacrylate (MMA) and heat treatment (HT). Each of borax and boric acid was impregnated in pressure tank, continued with MMA impregnation. A 5-atm pressure is applied for 4 hours to both borax and MMA impregnations. The next stage is HT at 90°C and 180°C. The analysis on chemical components was conducted using NIR Spectroscopy and the durability was tested using drywood termites. The results showed that there were changes in lignin, cellulose and hemicellulose components of the wood, as indicated with clear differences in spectra between impregnated and non-impregnated woods. The most significant difference was found on wood impregnated with borax, MMA and HT at 180 °C. This tested sample evidently had the best durability among the tested samples.

Medicinal plants for modern society today are still one of the alternative options in healthcare treatment. This condition is due to the local culture, tradition, and wisdom of a group of people that are still solid and thick. This study aims to analyze the types of medicinal plants used by the community in Rantau Panjang, Simpang Hilir District, North Kayong Regency. This research uses the survey method by conducting interviews with the community and identifying medicinal plants in the field. A sampling of the people who became respondents was done with a purposive sampling technique. The total number of respondents is 333 people distributed in several sub-village, namely Sepakat Jaya 71 people, Tembok Baru 65 people, Ampera 37 people, Makmur 61 people, Sinar Palung 25 people, Kebal Manuk 12 people, Sinar Selatan 35 people and Siput Lestari 27 people. The data obtained were analyzed for Use Value (UV) and Fidelity Level (FL). The village community of Rantau Panjang utilizes 69 types of medicinal plants, with the predominant plant family is Zingiberaceae. The highest use of plant parts is leaves (37.68%), the most common method of processing is boiled (57.97%), and the most extensive way of use is drunk as much as (60.86%). The plants with the highest UV values are turmeric (Curcuma longa L) (0.42), red liyak (Zingiber officinale Linn) (0.34), white turmeric (Curcuma zedoaria L) (0.28), and betel (Piper betle L) (0.22). The types of plants have the highest FL value (100), namely simpur, ketumbar, sawo, leban, pulai, jantung pisang, bunga raya, alalang, durian, nipah, kopi, selo daging, keladi, paku ikan, pegage, kumis kucing, mahkota dewa, belange, belimbing pelunjuk, asam jawa, andong, limau sambal, jambu biji, lidah buaya, pinang, leban, mentimun, daun salam, mentimun, manggis, bajakah, cempedak, pandan wangi, pasak bumi, tebu merah, jengkol, cengkodok, anggrek dan ketepeng.

Aesthetic and strength are not easy to be combined in one wood composite product. This research aimed at combining both utilizing MDF overlaid with avocado, mahogany and pine veneer. Seven types of MDF composite plywood (comply) were designed using two adhesive types of Epoxy and Isocyanat. The adhesive spread weight was 250 g m-2. Cold compression was conducted within 3 hours with the pressure of 15 kg cm-2. The research results showed that flexural modulus (MOE) and flexural strength (MOR) of PMI comply (pine veneer, isocyanat adhesive) increased respectively by 129.5% and 75.9% when compared to MDF. This research recommends that MDF comply may be utilized for the structural and non-structural purposes.