Properties of Melinjo (Gnetum gnemon LINN) Wood A Gymnospermae With Vessels Element
| Main Authors: | Marsoem, Sri Nugroho, -, Gudiwidayanto Sapto Putro |
|---|---|
| Format: | Article PeerReviewed application/pdf |
| Bahasa: | eng |
| Terbitan: |
, 2003
|
| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/135443/1/21.pdf https://repository.ugm.ac.id/135443/ |
Daftar Isi:
- A study to understand the properties of a wood that is bonically boing to Gymnospermae but the stucture of the wood contains vessel elements had been conducted on Melinjo (Gnetrum gnemon LINN) wood.Three trees of melinjo of DBH of about 40 cm have been harvested from community forest grown in sleman regency, Yogyakarta. The properties of the wood sample were observed physically and chemicelly and were analyzsis of variances using a factorial experiment is Randomized Complete Block Design. Wood samples in the trunk were distinguished based on three different radial and axial positions. Pysical propertiest of the wood were determized by using British Standard Methods, while chemical component of the wood was analysis according to ASTM standard procedures on sawdust of melinjo wood pssing a 40 mesh but retained in a 60 mesh shieves. The result showed that the wood had green condition moisture content from 102.32% to 158.17% with the inner part (radial position) of the bottom of the trunk had the highest MC. The wood showed an increase tred of average specific gravity (SG) i.e. from 0.50 in the inner most part to 0.58 in the middle part and 0.63 in the outer part wood. A rather high T/R shirinkage ratio was found in melinjo wood and its tangential, radial, and longitudinal shirinkages from green to oven dry condition were from 9.89% to 11.12%, From 3.00% to 5.45% and 0.14% to 0.292% respectively. A similar increased trend from the inner part to the outner part of wood was shown by the strength of the wood. Compression stress parallel to grain, compression stress perpendicular to grain, and static bending strength of melinjo wood showed a high correlation with its specific gravity. The MOR and MOE of the wood were from 610 kg/cm2 to 982 kg/cm2, and from 61.5 x 103 kg/cm2 to 124x 103 kg/cm2 respectively. Chemcal component analysis indicated that the wood contained holocellulose from 74.87% to 80.92%, lignin from 16.35% to 22.19%,and hot water soluble extractive from 1.82% to 4.90%.