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Articles 4 Documents
Search results for , issue "Vol 13, No 7 (1995): Jurnal Penelitian Hasil Hutan" : 4 Documents clear
KEAWETAN KAYU TUSAM (Pinus merkusii Jungh. et de Vr.) DAN MANGIUM (Acacia mangium Willd.) SETELAH FURFURILASI Balfas, Jamal; Sumarni, Ginuk
Jurnal Penelitian Hasil Hutan Vol 13, No 7 (1995): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1541.841 KB) | DOI: 10.20886/jphh.1995.13.7.259-265

Abstract

Two regrowth wood species, i.e. tusam (Pinus merkusii Jungh. et de Vr.) and mangium (Acacia mangium Wild.) were used in this study. Specimens measuring 25 mm x 25 mm x 50 mm and 5 mm x 25 mm x 25 mm were prepared for testing against dry-wood termite (Cryptotermes) and subteranean termite (Coptotermes) respectively. All specimens were air-dried  to approxi mately 16-18%  moisture content. One group of the specimens was further  oven - dried to reach moisture  content of  6-8%.  Furfurylation  was carried out by soaking  wood specimens for 24 hours  in a 98% fuifuryl  alcohol  solution  containing  0.35%  (v/v) of  ZnCl2  as catalyst. Furfurylated specimens were then cured at  l000C  for 48 hours.  Control and treated specimens were exposed to dry-wood and subteranean termites for 12 and 4 weeks respectively.Treated specimens revealed a weight gains of  10 to 40 % depending on size of specimens and  wood species. Speciesmens usd for testing drywood termites gained less weight than those of  subteranean termites. Tusam  specimens  markedly  showed  a  higher  weight  gain  than mangium.  Furfurylation using method 1 resulted in comparable weight gain to that of method 2. Control specimens of tusam an mangium are both encountered susceptible to dry-wood and subteranean  termite  attacts.  Tusam  had  less initial durability  against  Coptotermes  than mangium, but the wood species had a similar durability against Cryptotermess.  The modified wood with furfuryl alcohol abviously possessed an improved durability  upon the two termites. Tusam specimens gained more durability improvement than mangium.
PENGARUH TEBAL VENIR DAN BERAT LABUR PEREKAT TERHADAP KETEGUHAN REKAT KAYU LAPIS DAMAR Santoso, Adi
Jurnal Penelitian Hasil Hutan Vol 13, No 7 (1995): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1995.13.7.266-274

Abstract

This paper present the study results on the effect of veneer thickness and glue spread on bonding strength of damar (Agathis spec.) plywood. The responses observed  were the corrected absorption height measurement, depth of lathe check of  veneers, veneers thickness,  moisture content,   specific  gravity and  plywood  bonding  strength. The design employed was  tire randomized completely design with factorial experiment.The results showed that the effect of veneers thickness on plywood bonding strength was not significant, while the glue spread have significant  effecton the plywood bonding strength.  To meet damar plywood requirement for interior uses it ts advised to use 150 gm: perface  of glue spread with urea formaldehyde adhesive.
KAJIAN EKONOMI PEMANFAATAN KAYU UNTUK BARANG KERAJINAN Sylviani, Sylviani
Jurnal Penelitian Hasil Hutan Vol 13, No 7 (1995): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1995.13.7.275-282

Abstract

Processing of wood for handycraft is one way to increase added value through belier wood utilization. Research  on wood handycraft was in Central Java.  The study  indicated that total added value for eight kind of product  is Rp. 23.355,000 for every m3 input. Although cost of production increased up to Rp. 11.005.550 for every m3 input  the profit increase to Rp. 7.202.000 for every m3 input leaving handycarft in a better off situation. The profit depend on the cost of production.Abded value were distributed  into various factory variables such as overhead 12, 67 percent, labour 40.44 percent. materials 7.30 percent and management 39,56 percent.Total employment absorbed in producing all products were 29.290 mandays or 205.030man hours a year. However,  handycraft industry were facmg various problems. aspecially on raw materials and capital.
EKSTRAKSI LILIN DAUN PINUS DENGAN TEKNOLOGI SUPERKRITIKALFLUIDA CO2 Wiyono, Bambang
Jurnal Penelitian Hasil Hutan Vol 13, No 7 (1995): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1995.13.7.283-292

Abstract

The objectives of this research is to study the influence of flushing activities on crude waxes yield, and to study the extraction of waxes from pine needles by using supercritical fluid C02 technology. The extraction was carried out at an 400C extraction temperature and at various extraction pressures. consisting of  9,14,24 and 30 MPa. Crude waxes were precipitated in the first cold trap at  6-7 MPa intermediate pressure and 00C, and the rest of  it was precipitated in the second cold trap at an 0,1 MPa with a similar temperature. After extraction, it was always followed by flushing activities  through two steps to get waxes which still remained in the valves and or in the line on the system. First flushing was performed with supercritical fluid extraction without any  sample  in  the  extraction  cell. The second flushing  was  conducted  with a chloroform solvent.  Pure waxes of were purified  and analysed by using High Performance Liquid Chromatography (HPLC).Results indicated that the flushing activities with supercritical fluid extraction without any sample in the extraction cell followed by a chloroform solvent had agreat effect on crude waxes yield. At a 30 MPa extraction pressure and at an 40°C extraction temperature, supercritical fluid extraction with flushing gave crude wax yield four time greater than the cude waxes yield obtained by supercritical fluid extraction without any flushing, even to the crude waxes yield from  the chlorofrom solvent extraction.  The increase in extraction pressure caused an increase in crude waxes, both  obtained from the first and  the second  cold  traps. Moreover,  HPLC analysis of pure waxes revealed  that the elution of pure waxes took 3.70 - 3.90 minutes. lt was also shown that an increase in extraction pressure led to an increase in pure waxes.

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