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Jurnal Penelitian Hasil Hutan
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Articles 5 Documents
Search results for , issue " Vol 3, No 2 (1986): Jurnal Penelitian Hasil Hutan" : 5 Documents clear
PENGARUH SUDUT KERAT DAN BAGIAN BATANG TERHADAP SIFAT PENGGERGAJIAN KAYU KELAPA (Cocos nucifera. L.) Rachman, Osly
Jurnal Penelitian Hasil Hutan Vol 3, No 2 (1986): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2327.218 KB) | DOI: 10.20886/jphh.1986.3.2.28-32

Abstract

Eighteen green cocowood samples, 3 m in length each were sawn into 3 cm thick boards. Trunk samples consisted of two groups, butt logs and top logs. Each group was sawn with 3 degrees of hook angle, namely 19,22 and 25 degrees. Sawing properties, i.e., power consumption, sawing productivity and lumber recovery were related with hook angle and trunk portion. The results reveal that trunk portion and hook angle had a significant effect on power consumption. The butt logs consumed power higher than top logs. Trunk portion had no effect on sawing productivity but greater hook angle tends to increase the productivity. Hook angle and trunk portion had no effect on recovery.
Serangan awal kumbang ambrosia Platypus trepanatus Pada dolok kayu ramin Sukartana, P
Jurnal Penelitian Hasil Hutan Vol 3, No 2 (1986): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (14302.442 KB) | DOI: 10.20886/jphh.1986.3.2.25-27

Abstract

Dolok segar kayu ramin  (Gonystylus bancanus Kurz.)  sangat peka terhadap serangan kumbang ambrosia  Platypus trepanatus  (Chapman). Serangan awal kumbang ini terjadi sejak hari pertama atau bahkan mungkin sekali hanya beberapa jam   saja setelah pohon ramin ditebang.Lama  serangan  awal dipengaruhi oleh intensitas serangannya. Serangan awal yang  hebat akan lebih cepat terhenti daripada serangan yang  ringan.
GASIFIKASI ARANG KAYU UNTUK PEMBANGKITAN TENAGA LISTRIK Hartoyo, Hartoyo; Syachri, Tjutju Nurhayati
Jurnal Penelitian Hasil Hutan Vol 3, No 2 (1986): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (16410.671 KB) | DOI: 10.20886/jphh.1986.3.2.33-38

Abstract

An  experiment  on  charcoal  gasification   for  power  generation   was  conducted    on  a pilot   scale  of  7.5 KVA.   This experiment  used  50  kg  mixed  charcoal  species  having  moisture  content   of  6.9  %, ash content   of 2.5 %, volatile  matter  of  22.4  % and calorific  value of 6733  cal/g.The  product gas was run  through  gas purifier,  jet  condenser,  cyclone,  gas cooler and filter.  The gas was composed   of carbon  monoxide  (26  to  31%),   carbon  dioxide  (3  to  15%), methane  (0 to 1%) with  calorific  values ranging from  2600  to 4100  cal/g.The produce  gas which  was assumed   to  have  been purified   of  tar and  water  vapour  was fed  into  a power  generator.The  electric  power  generated   ranged  from   200   to  234  Volts  at around  2.08  A  and  a revolution   of  from   1822  to 2110 RPM. It  turned  out  that  these gases still  contained   tar and  water  vapour  which  was observed  at the engine,  an indication that  the  gas purifier   did  not  function  weel.  This  is evidenced   by  the fluctuation  of  the gas flow  rate  (from  9.8  to  1277 Nm3/hour).The  efficiency   of  charcoal  conversion   to  electric  and  heat  energy   was  11. 7% and  60% respectively   for  a load of 1.8  KW  and  7 hours  of  operation,   and  13,9  % and  50.5   % respectively   for  a load  of  2.8  KW  and  7 hours  of  operation. 
PENGARUH KOMPOSISI PEREKAT TERHADAP EMISI FORMALDEHIDA DAN SIFAT FISIS-MEKANIS PAPAN PARTIKEL Sutigno, Paribotro; Sumadiwangsa, Suwardi
Jurnal Penelitian Hasil Hutan Vol 3, No 2 (1986): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (14736.143 KB) | DOI: 10.20886/jphh.1986.3.2.1-8

Abstract

One  of  the  drawbacks   of  using particleboard   bonded  with  urea formaldehyde  (UF)  is the  formaldehyde  emission, especially  in a room  with  limited  ventilation.  Some  countries  have imposed  restriction  of allowable  emission  for certain  uses.This  work  deals  with  the  study   on  the  effect   of  the  use of  variety  of  hardeners  types  and percentages   of  melamin formaldehyde (MF) as fortifier   on formaldehyde    emission.   The experiment   reveals that  the effect  of hardener  mixed  with catching  agent  and the effect  of fortifier on formaldehyde   emission  was effective   to curb  down  the formaldehyde   emission.The effect  of fortifier   on some physical  and mechanical properties   was observed.  It decreases water absorption  and thickness swelling,  increases shear strength;  internal  bond  strength,   and  the  modulus  of rupture,   but  did  not  affect  the modulus  of elasticity.The effect  of hardener  mixed  with  catching  agent on modulus  of  elasticity  was not significant,  while on other  particle- board properties   the  effect   was not  consistent.
PENGAWETAN KAYU KELAPA DENGAN METODE RENDAMAN DINGIN Barly, Barly; Abdurrochim, Sasa
Jurnal Penelitian Hasil Hutan Vol 3, No 2 (1986): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (19161.481 KB) | DOI: 10.20886/jphh.1986.3.2.9-13

Abstract

A  study   on  the   treatability    of  coconut   trunk   was  carried  out  using  the  cold  soaking   method   with   Formula   7, Wolmanit   CB and Diffusol   CB as preservatives.   The specimens  size  50cm  x  5cm  x  5cm  were soaked  in five  percent  pre- servatives  solution   for  period   of  one,  three,  five  and  seven  days.  The  preservatives   retention   and  penetration  were re- corded.  From  this study   the  following   conclusions   could  be drawnThe  densities   and  treatment    schedule   have  a  significant   bearing  on  the  preservatives  penetration  and  retention.Both  factors  have significant   interaction   effect   on preservatives  retention   and penetration.    This implies  that  the densities should  be taken  into  account  in determining   the effectivity  of a treatment   schedule.

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