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Journal : PERENNIAL

SIFAT FISIK BATANG DAN CABANG KAYU MAKADAMIA Andi Detti Yunianti
PERENNIAL Vol. 2 No. 1 (2006)
Publisher : Forestry Faculty of Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24259/perennial.v2i1.149

Abstract

Since there have been a big difference between wood production and industrial need, wood diversification plays an important role in handling wood deficiencies. Wood raw material diversification could developed and increased throughout the use of whole parts of the tree including branch. The current study was aimed at understanding stem and branch physical properties (basic density, air-dry specific gravity, air-dry moisture content and shrinkage) of macadamia wood as quality indicators for efficient utilization in the future. For the purpose of the study, parts of stem and branch of the tree were taken from a macadamia tree. Test specimens of stem were cut 50 cm from the ground while that of branch were selected from the largest diameter at 10 cm distance from the main stem of the tree. All samples were tested for their physical properties according to ISO standards, 1975. Results showed that the basic density, air dry specific gravity and longitudinal shrinkage of the branchwood of macadamia were higher than those of the stem. The air-dry moisture content, radial and tangential shrinkage were low on the branchwood. Keywords : Wood Physical Properties, Branchwood , Macadamia Wood
POROSITAS KAYU JATI KLON CEPU DAN MADIUN UMUR 7 TAHUN Andi Detti Yunianti
PERENNIAL Vol. 8 No. 2 (2012)
Publisher : Forestry Faculty of Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24259/perennial.v8i2.219

Abstract

This study was aimed at determining the pore characteristic (type, dimension and frequency of vessel) of teak from different clones (Cloned Cepu and Madiun). For the purpose of the study, teak wood samples with the age of 7 years were taken from research site number 22a of RPH Banaran, BKPH Playen, Gunung Kidul, in Watu Sipat Forests, Biotechnology and Forest Tree Improvement Research Facilities in Yogyakarta at different planting distances (3 m x 3 m and 2 m x 6 m). Results show that the type of pores is diffuse-porous until the 3th growth ring and after that; it becomes semi ring-porous. The variation of diameter, length and frequency of vessels from cloned Cepu and spacing 3 m x 3 m are comparatively uniform compared to that of cloned Madiun and spacing 2 m x 6 m. Key words: Cloned teak, pores, planting distance, Cepu, Madiun
Karakteristik Biopelet dari Tanaman Lamtoro (Leucanea leucocephala Lam) dan Gamal (Gliricidia sepium Jacq) pada Berbagai Variasi Komposisi dan Ukuran Partikel : Characteristics of Biopellet from Lamtoro (Leucanea leucocephala Lam) and Gamal (Gliricidia sepium Jacq) at Different Particle Size and Composition Aprilia, Nurul; Yunianti, Andi Detti; S, Suhasman; Pari, Gustan
PERENNIAL Vol 19 No 2 (2023): Vol. 19 No. 2, Oktober 2023
Publisher : Forestry Faculty of Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24259/perennial.v19i2.35034

Abstract

Energy needs continue to increase, resulting in energy reserves decreasing yearly, especially those made from fossil fuels, which are non-renewable energy, so their availability is limited. Therefore, efforts are needed to find alternative energy sources that can be developed. An energy source that can be produced is biomass. Gamal (Leucanea leucocephala)  and Lamtoro (Gliricidia sepium) plants are biomass often used as alternative raw materials for energy, namely biopellets, because they have high calorific value. This study aimed to determine the characteristics of biopellets from L. leucocephala and G. sepium with various compositions and particle sizes. The composition of the L. leucocephala and G. sepium raw materials is 1:1, 1:2, and 2:1 with a particle size that is passed 40 mesh retained 60 mesh, passed 60 mesh retained 80 mesh, and passed 80 mesh retained 100 mesh. Quality testing of biopellets based on SNI 8951:2020 includes density, moisture content, fly content, ash content, fixed carbon, and calorific value. The results showed that the biopellets were following SNI 8951:2020, namely the average value of density, moisture content, and ash content, for the parameters of the value of the flying substance content and fixed carbon were not in accordance. Statistics have shown that particle size significantly affects density, ash content, volatile matter, and fixed carbon. The composition affects the moisture content, fixed carbon, volatile matter content, and ash content. The best biopellets were produced in the treatment with 80 mesh particle size and 2:1 composition.