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RISS 인기검색어
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- 저자 : Elis Nina HERLIYANA (검색결과 3 건)
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Dodi NANDIKA,Elis Nina HERLIYANA,Arinana ARINANA,Yusuf Sudo Hadi,Mohamad Miftah RAHMAN 한국목재공학회 2023 목재공학 Vol.51 No.3
Recently, the morphological and molecular features of five stain fungi infecting rubberwood (Hevea brasiliensis), namely Paecilomyces maximus, Paecilomyces formosus, Penicillium crustosum, Paecilomyces lecythidis and Aspergillus chevalieri, have been studied. Prior to this study, the authors revealed that catechin from gambir (Uncaria gambir) could inhibit the growth of the white-rot fungus Schizophyllum commune, and it was important to determine the bioactivity of the aforementioned agent against A. chevalieri. The efficacy of the biocidal agent was examined using a laboratory wooden block test. Rubberwood blocks, 8 mm in thickness, 20 mm in width, and 30 mm in length, were impregnated with catechin solution at concentrations of 6%, 9%, 12%, and 15% (w/v) using the vacuum-pressure method, and their bioactivity was monitored over three weeks through visual and scanning electron microscope assessment of fungal growth as well as the discoloration intensity of the wood samples. The results showed that catechin treatment increased the resistance of wood samples to A. chevalieri. Overall, the higher the catechin concentration, the lower the fungal growth. The lowest fungal growth was observed in the wood samples treated with 12% and 15% catechin (score of 0), demonstrating no discoloration. In contrast, the fungal growth score of the untreated wood samples reached 4, indicating severe discoloration. Catechins appear to be adequate biofungicides against stain fungi in rubberwood.
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( Yusuf Sudo Hadi ),( Elis Nina Herliyana ),( Gustan Pari ),( Rohmah Pari ),( Imam Busyra Abdillah ) 한국목재공학회 2022 목재공학 Vol.50 No.1
Wood from tropical plantation forests has lower physical and mechanical properties than mature wood. Furfuryl alcohol (FA) impregnation into the wood could help to enhance hydrophobic properties, dimensional stability, and structural strength. Furfurylation was applied to specimens of the following four fast-growing tropical wood species: jabon (Anthocephalus cadamba), sengon (Falcataria moluccana), mangium (Acacia mangium), and pine (Pinus merkusii). The discoloration and physical and mechanical properties were subsequently measured, and the results showed that furfurylated wood had a darker color and better physical and mechanical properties than untreated wood. Specifically, the furfurylated wood had higher density, modulus of elasticity, and hardness and lower moisture content, water absorption, swelling, and shrinkage. The furfurylation significantly enhanced physical and mechanical properties.
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< 구두-C-05 > Durability of Bamboo Oriented Strand Board against Insect, Fungi, and Weather
( Fauzi Febrianto ),( Muhammad Anchu Kastian Asmur ),( Sena Maulana ),( Dini Lestari ),( M Qola A Damanik ),( Elis Nina Herliyana ),( Nam Hun Kim ) 한국목재공학회 2018 한국목재공학회 학술발표논문집 Vol.2018 No.1
Bamboo oriented strand board (BOSB) is composite board composed of thin bamboo strand that was glued and hot pressed for structural application. In exterior application, BOSB will interact directly with deterioration factors such as physical (weathering) and biology (decay and powder post beetles). The objectives were to evaluate the physical, mechanical and durability of BOSB before and after baited to white rot decay Schizophyllum commune and powder post beetles, and before and after exposure to natural weathering. Prior to be mixed with PF adhesive, the strands were steam pre-treated in closed chamber at certain conditions with or without rinsed by distilled water and NaOH 1% solution. PF adhesive in amount of 8% and 1% of wax based on OD weight of strand were used. The ratio for face, core and back layers of BOSB were set at 1:1:1. It is clear that the physical, mechanical and durability against fungi, insect and natural weathering of BOSB were much influenced by steam treatment. Gradually, during 6 months exposure to natural weather the physical and mechanical properties of BOSB dropped significantly. Steam treatment on bamboo strand improved the physical, mechanical and durability properties of BOSB. Steam treatment followed by washing with NaOH 1% gave the best results on all parameters measured. Steam treatment followed by washing with NaOH 1% after exposure for 6 months had MOE and MOR parallel to grain direction fulfilled CSA 0437.0 (Grade 0-1) standard. BOSB prepared from steam treatment followed by washing with 1% NaOH solution belongs to 2nd grades on fungi resistance.
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