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Jurnal Penelitian Hasil Hutan
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Search results for , issue " Vol 5, No 4 (1988): Jurnal Penelitian Hasil Hutan" : 11 Documents clear
PROGRAM BASIC UNTUK PENENTUAN BATAS ELASTIS KEKUATAN LENTUR STATIS Kamasudirdja, Suparman
Jurnal Penelitian Hasil Hutan Vol 5, No 4 (1988): 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.1988.5.4.196-202

Abstract

One of  the procedures  for  determining the elastic  limit  in static  bending  test  is through  eye  fitting  of  a  successive load-deflection   reading  with  a  straight  line  on  a  graph paper.   The  procedure   is simple  and  does  not  require  elaborate apparatus. Consequently, it  is still  applied  in  many  testing  laboratories.  The  above  procedure   however, contains  some weakness,   namely  it  is laborious,  time  consuming,  subjective   and  is  inconsistent   within   the same  and among  different plotters.An  attempt  was made  by  the author  to use cheap personal pocket   computer  for finding  the elastic limit of load and deflection,   and  hence  also  the  corresponding   modulus  of  elasticity  and  bending- strength  within  elastic  limit.  The  basic programme   prepared  by  the author,  whenever  needed  can be used also for  converting  the observed  load/deflection data into  calibrated  values or other  measurement  units.  This could  be done for example  after data checking,  or debugging step by  inserting a jump  command  to a specific  sub-routine   which  will handle specific  computation
SIFAT PEMESINAN 32 JENIS KAYU DARI DAERAH JAWA BARAT DAN NUSA TENGGARA TIMUR Rachman, Osly
Jurnal Penelitian Hasil Hutan Vol 5, No 4 (1988): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3991.057 KB) | DOI: 10.20886/jphh.1988.5.4.216-225

Abstract

 The paper presents  a  test result of machining properties  of 32 wood species from  West Java  and East of Nusa  Tenggara East. The air dried samples were tested according  to  the ASTM  D­1666/64 standard  that was modified  according  to the Forest Products Research Institute  Report  No. 160  (1982).   In most  of the species 25 or more samples were available  for  test.  The machining  properties   tested  included  planning,  shaping, boring,  turning  and sanding.The  result  reveals  that  eighteen  wood  species have good  to  very good machining   properties, five  species  have  very good  machining  properties namely gintung, pongokan,    rasamala, melur,  tanjung  and leda  II.The  other  species are  good  or fair in some  properties  and poor  or very poor  in other.  The species with poor  or very poor   machining  properties   are  bareuhbeuy, hantap heulang  and  leda   III.
INTENSITAS SERANGAN PENGGEREK KAYU DI LAUT PADA BEBERAPA JENIS KAYU Muslich, Mohammad; Sumarni, Ginuk
Jurnal Penelitian Hasil Hutan Vol 5, No 4 (1988): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2838.616 KB) | DOI: 10.20886/jphh.1988.5.4.203-206

Abstract

One hundred  fifty  pieces   of  wood  from  five species  were exposed   to marine  borers in three   different locations  for periods   up  to  three  months   at  different   periods.   The  tests  were  conducted   around  Jak9rta  Gulf  i.e  about   3  km  off shore from Mauk  from  January  -   June  1986, Rambut Island from  July - November 1986, and Puntung, Java lsland from  November 1986   -   February 1987. The  result shows  that  most  of  the  wood  tested  were  badly  attacked   by Molluscs  belonging  to the specise Martesia striata  Linne.,   Teredo  bartschi  Clap.,   Dichyathifer  manni  Wright.,  and Bankia campanellata Molli Roch.  Diospyros  celebica Bahh, wood  seems  to  be resistant  to  marine  borers.   The  intensity   of  borer attack  on the woods  in the three locations  are not significantly different. 
BIAYA PRODUKSI KAYU LAPIS PADA BEBERAPA PERUSAHAAN DI SUMATRA SELATAN DAN KALIMANTAN SELATAN Abdurachman, Akub J; Sylviani, Sylviani
Jurnal Penelitian Hasil Hutan Vol 5, No 4 (1988): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5581.509 KB) | DOI: 10.20886/jphh.1988.5.4.233-238

Abstract

A research in production cost and its distribution was conducted in several plywood manufacturers in South Sumatra and South Kalimantan. The  average, distribution and  variation  of production cost  are discussed in this report. The  results  showed  that  average cost  of  production  was  Rp  313,066  per cu.m.  with  coefficient of  variation  9% consisting of  average  fixed cost  Rp 59,135 per cu.m.  with  coefficient of  variation  19%  and  average  variable  cost Rp 253,931 per cu.m.  with  coefficient   of  variation  12%. Average profit   before  taxes  was Rp 78,827 per  cu.m.  or 26% of production cost  with  coefficient  of  variation  48%.  Due to the fact  that  the largers component   of  the cost  was used for material  expense (56%) so  it is advised  the manufacturers  should  give more care the material processing  aspect  so that  the waste  could  be reduced  as small as possible.
PENGARUH JENIS KAYU DAN KOMPOSISI PEREKAT UREA FORMALDEHIDATERHADAP KETEGUHAN REKAT KAYU LAPIS BEBERAPA JENIS KAYU HUTAN TANAMAN INDUSTRI Kliwon, Suwandi; lskandar, M I; Sutigno, Paribroto
Jurnal Penelitian Hasil Hutan Vol 5, No 4 (1988): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5347.86 KB) | DOI: 10.20886/jphh.1988.5.4.226-232

Abstract

A glue shear test  was conducted   using plywood panel,  made  from  three  wood  species  namely pine  (Pinus merkusii Yung  et de  Vr.),  Eucalyptus alba and Eucalyptus deglupta from  West Java.  The bolts were rotary peeled  into  veneer of  1.5 mm  thick.The  veneer  sheets  were glue  with  urea formaldehyde   resin in combination with  meranti  and kapur  veneers.  Each plywood  sample  thus consisted  of three layer veneer and meranti  merah (red meranti)  and kapur (Dryobalanops  oramatica Gaert) as face and  back  veneers.The  bonding  strength  (glue shear strength)   of  each plywood  type  were then  tested according  to the Indonesian  and Japaneess  standard. The  result  indicates  that  there  were  significant differences between wood  species  and  variation  of extender   composition    according   to  the  Indonesian standard and  only  percentage   of  extenders  indicated significant difference   using Japaneess standard.  Percentage  10%  extender   was the  best bonding  strength  of plywood  comprising  with the  others.
SIFAT PAPAN WOL KAYU DARI 12 JENIS KAYU HUTAN TANAMAN INDUSTRI Sulastiningsih, I M; Memed, Rozak; Sutigno, Paribotro
Jurnal Penelitian Hasil Hutan Vol 5, No 4 (1988): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (9102.769 KB) | DOI: 10.20886/jphh.1988.5.4.239-245

Abstract

The results  of  laboratory  test  of  wood-wood board properties  made from  12 individual  wood species obtained  from West Java, Lampung  and East Nusa Tenggara province are reported  in this paper.  The properties tested  were board density, moisture  content,   thickness  reduction   due  to compression  and bending strength.The study  has revealed  that  Eucalyptus  urophylla  and  Eucalyptus platiphylla F.V.M.  obtained  from  natural forests are impossible  to plane  because  they  are very  hard.  The average yield  of  wood-wool   from  the  rest is 454.43 kg percubic meter  of  log input. These  wood-wool   can  be processed   to  become wood-wool boards without first  immersing  them  in cold  water.   The physical  and  mechanical  properties   of  wood-wool   boards made  from  seven  wood species  (meranti  merah I, pinus  I,  mahoni  uganda,  meranti  tembaga,  leda,  akasia and  meranti  merah II) catalyzed  with  CaCl2 solution  are in conformity with  the DIN 1101Standard.   However, only  four  wood  species  (meranti  merah  I,  meranti  tembaga, leda and meranti  merah II)  catalyzed with  Ca(OH)2 suspention meet  the standard  requirement. 
PENGARUH KADAR PEREKAT DAN CAMPURAN KULIT TERHADAP SIFAT FISIS DAN MEKANIS PAPAN PARTIKEL TUSAM (Pinus merkusii) Sulastiningsih, I M; Memed, Rozak; Sutigno, Paribotro
Jurnal Penelitian Hasil Hutan Vol 5, No 4 (1988): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6125.755 KB) | DOI: 10.20886/jphh.1988.5.4.184-191

Abstract

The  laboratory   test  of  strength  properties   of pine  particleboard subtituted  with 0,  20, 40 and 60 percent of pine bark, glued  with  8, 10, and  12 percent   liquid  urea formaldehvde    (by particle  dry  weight  basis) is reported   in  this paper.  Pine  wood  and  its  bark  were obtained   from West Java.                                                                                                                                                    The result  shows  that  the substitution with  bark of  20,  40,  and  60 percent   of pine   wood  particle  improved   water absorption   and  thickness- swelling  properties;   however,  it decreased  mechanical properties of particleboard.  Particleboard with  high  bark  content   has lower  mechanical  properties   than  that  with  low  bark content.   The physical   and  mechanical properties   of  particleboard   that  is subtiuuted  with  20 and  40%  bark and  10 and  12%  urea-formaldehyde resin meet the FAO   standard   for   medium   density   particleboard,  except for,  modulus of rupture. If   we  compared  with  Indonesian standard,  the properties  that do not  meet  the standard  are the modulus  of rupture  and the internal  bond strength 
INTENSITAS SERANGAN DAN KOMUNITAS RAYAP TANAH DI KECAMATAN CIKAMPEK Sumami, Ginuk; Ismanto, Agus
Jurnal Penelitian Hasil Hutan Vol 5, No 4 (1988): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3991.057 KB) | DOI: 10.20886/jphh.1988.5.4.211-215

Abstract

 The study was carried  out at Cikampek on three different soil types  namely  Red  Latosol,  Redish Brown Latosol  and Lateritie  Association; Complex of  Yellowish  Red Podzolic, Yellow  Podzolic  and  Regosol; Complex of Grumusol, Regosol and  Mediteran.Odontotermes  grandiceps Holmgren, Microtermes insperatus Kemner  and Macrotermes   gilvus (Hagen) seems  to  be common  species  in  the  above  locations. The  highest  density   was found on  Complex of  Yellowish  Red Podzolic, Yellow  Podzolic  and Regosol  (123  termites per  test  block), while   the  lowest  one  was found   on  Complex  of  Grumusol, Regosol  and Mediteran   (14  termites  per  test block). Termite attack intensity during  the  first,  second,  third  and fourth  period  of observation  in the three  soil types  were different.
PENGARUH KELEMBABAN TERHADAP INTENSITAS SERANGAN, AKTIVITAS MAKAN DAN DAYA HIDUP CRYPTOTERMES CYNOCEPHALUS LIGHT. Sumami, Ginuk
Jurnal Penelitian Hasil Hutan Vol 5, No 4 (1988): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2060.14 KB) | DOI: 10.20886/jphh.1988.5.4.177-178

Abstract

A preliminary   study   on  the  effect  of  air humidity   to  infestation   intensity,  feeding  activity   and survival of  the dry- wood  termite  Cryptotermes  cynocephalus   Light,   has been  conducted   by  using flue levels of humidity i.e  37.75%;  70.21%; 83.38%;   87.75%  and 97.0%.The  salts  CaCl2,   NaCl, KCl and K2S04 were  respectively used to control the  air  humidity   of  37.73%  to 87.75%; whereas  H20   was used  to control   the  air humidity   of  97.0%.  Rubber  wood  samples  of  1.5  cm  by  2.5 cm  by  5.0  cm  with a  hole  of  3 cm  by  1 cm  were prepared   to feed  the  termite  workers. The  results  reveal that  the  lowest  feeding activity, infestation   intensity   and  survival   of  the  dry-wood  termite   were indicated   by  the  37.73%  air humidity;   where as the  highest  feeding activity and  survival of  the  termite  were  indicated by  the  90% air humidity.   Meanwhile  there  were no significant   influence   of  infestation   intensity   within   the air  humidity   of  more   than  70%.
SIFAT PAPAN WOL KAYU SEBELAS JENIS KAYU DARI SUMATRA SELATAN DAN JAWA BARAT Sulastiningsih, I M; Memed, Rozak; Sutigno, Paribroto
Jurnal Penelitian Hasil Hutan Vol 5, No 4 (1988): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3878 KB) | DOI: 10.20886/jphh.1988.5.4.179-183

Abstract

The  results  of  laboratory  test of wood-wool   board properties  manufactured  from  11 individual  wood  species obtained from  South  Sumatra  and  West Java are reported  in this paper. The tests comprising board density, moisture content, thickness reduction due to  compression   and  bending  strength.The study  reveals that average yield  of  wood-wool is 315 kg per cubic  meter  of log input. The physical and mechanical properties   of   wood-wool   board  from  five  wood  species. mineralized   with  CaCl2  solution   were  in conformity with  the DIN  11.01  standard.  However,  only  four  wood  species  mineralized  with  Ca(OH)2 suspension  met  the standard  requirements. 

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