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INDONESIA
Jurnal Penelitian Hasil Hutan
Published by Badan Penelitian dan Penegembangan Kehutanan
ISSN : 02164329     EISSN : 24428957     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management
Arjuna Subject : -
Articles 1,559 Documents
 108   109   110   111   112 
PENELAAHAN PENGARUH WAKTU PENGKONDISIAN DAN PENGGUNAAN PARAFIN PADA CONTOH UJI TERHADAP EMISI FORMALDEHIDA PAPAN PARTIKEL Adi Santoso; Paribotro Sutigno
Jurnal Penelitian Hasil Hutan Vol 20, No 1 (2002): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2002.20.1.86-93

Abstract

Determination of the formaldehyde emission from particleboard can correspond to the American and Japan Standards. However, the difference in preparing the test sample of particlebourd can bring about different results on the determination of such formaldehyde emission. this report deals with assessing the effect of conditioning duration and the use of paraffin in preparing the test sample of particleboard in accordance with both American and Japan Standars on the formaldehyde emission.The results revealed that conditioning duration and the me of puroffin affected significantly theemission of formaldehyde from the tested sample of particleboard the longer the duration, the lower, the emission level. Meanwhile, the use of paraffin on the particleboard sample tended to lower its formaldehyde emission than the one from the sample without paraffin. The relation between conditioning duration (X) and formaldehyde emission (Y) could further be expressed in linear regression equations with significant negative correlation coefficients (r) as follows: Without paraffinY = 4.20- 0.27X ( r = - 0. 9348); US standardY = 12.68- 0.98X ( r = - 0. 9433 ); Japan standard with paraffin.Y= 2.75 - 0.22X ( r = - 0.9756); US standardY = R.46 - 0.33X ( r = - 0.9824); Japan standard At a given conditioning duration, the average emission of formaldehyde from the particleboard with paraffin decreased by 1.61 µg/mm (according to American Standards) and 2.14 µg/ml (according to Japan Standard). Therefore, such figures confirmed the case that different sample preparation to particleboard in accordance with American and Japan Standards brought about different levels of formaldehyde emission.
PENENTUAN PENUMPULAN PISAU PADA PERMUKAAN KAYU Jamal Balfas
Jurnal Penelitian Hasil Hutan Vol 10, No 4 (1992): 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.1992.10.4.66-69

Abstract

The wear of wood cutting tools. is. generally, the process which makes a usable tool unfit for continued use.  The replacement of the worn cutter by  reconditioning  or substitution of a new one represents a necessary cost which can be minimized  by controlling tool wear. Numerous  studies have been conducted through direct  observations on the cutting edge using a variety  of photographic methods. Such observations are quite complicated and can hardly be introduced to industrial practices.  This study is aimed to explore a possibility of determining  cutting  tool wear indirectly  through the work piece observation.   It is based on assumption  that knife blunting has a direct  bearing on the quality of the finished product,  i.e., changing the geometry of cutting marks on the wood surface.Boards of two wood species,  rasamala and mangium,  were seasoned to air-dry condition and planed  using new sharp knives at one feed  speed of 30 .m/min.  Observations were carried out sequentially at 5 pianing  distances, i.e., 10, 20,  40,  80 and 160 m.  Cutting marks  geometry on the wood surface  was distinguished by rubbing the surface gently with a carbon paper.  Measurements  of cutting marks and the width of cutting peak were undertaken using a digital calliper.  Results showed that values of cutting marks and width of catting peaks markedly increased with increasing planing distances.  Blunting process was significantly   affected  by wood species. Knives used for planing  rasamala boards blunied quicker than those used for  mangium.   These, to some extend, revealed  a possible use of cutting marks structure  on wood surface for  determining the wear of cutting edge.
PENGAWETAN TUJUH JENIS KAYU SECARA RENDAMAN PANAS DINGIN DENGAN BAHAN PENGAWET IMPRALIT 16 SP DAN IMPRALIT CKB Sasa Abdurrohim
Jurnal Penelitian Hasil Hutan Vol 15, No 4 (1997): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1997.15.4.312-322

Abstract

Bagan pengawetan bagi kayu Indonesia yang diawetkan secara rendaman panas dingin menggunakan bahan pengawet yang masih diizinkan baru diperoleh pada beberapa jenis saja. Penelitian lanjutan terhadap jenis kayu lain menggunakan berbagai bahan pengawet perlu dilakukan.Tujuh jenis kayu dalam keadaan kering udara berukuran 5 cm x 5 cm x 50 cm, diawetkan dengan proses rendaman panas dingin menggunakan bahan pengawet lmpralit 16 SP don lmpralit CKB dengan konsentrasi larutan 5 % dan 10 %. Lama rendaman panas yang digunakan 1 jam dan 3 jam dengan suhu antara 65 °C - 70 °C yang masing-masing diikuti rendaman dingin I hari.Hasil penelitian menunjukkan bahwa dari tujuh jenis kayu yang diteliti, Lima jenis, yaitu damar,rengas, sengon, sumpung dan tusam, dapat diawetkan dengan kedua jenis bahan pengawet, sedangkan dua jenis kayu lainnya, yaitu melina dan suren, tidak ada yang mencapai persyaratan yang ditentukan. Dari percobaan ini dapat disusun bagan pengawetan yang dianjurkan untuk kelima jenis kayu tersebut.
PERILAKU PENGERINGAN ROTAN MANAU (CALAMUS MANAN MIQ.) DAN ROTAN SEMAMBU (CALAMUS SCIPIONUM LOUR) Efrida Basri; Suparman Karnasudirdja
Jurnal Penelitian Hasil Hutan Vol 4, No 1 (1987): 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.1987.4.1.12-16

Abstract

Rattan is one of important minor forest  products in Indonesia.  In fact world supply of this material comes mainly from  this country.  One of the weaknesses of rattan is its susceptibility  to various micro-organism  specifically staining  fungi  and borer insects. The former flourishes when the moisture content of the cane is high. Immediate drying of rattan cane is therefore essential.   Studies on the air drying and dehumidifying of two species of rattan canes have been undertaken,  which include rate of drying and drying performance of the samples. As has been anticipated,  the result shows that drying by dehumidifier is much faster compared  with that of air drying. However,  the quality of the two rattan species (degree of staining,  insect attack,  shrinkage, and colour)  are about  the same. The results also show that air drying rattans produces better gloss compared with that of dehumidifier drying. Other rattan defects  due to drying speed such as shrinkage  or wrinkle,  were not noticeable.
PENGARUH JENIS PEREKAT DAN KOMBINASI JENIS KAYU TERHADAP KETEGUHAN REKAT KAYU LAMINA Adi Santoso; Jamaludin Malik
Jurnal Penelitian Hasil Hutan Vol 23, No 5 (2005): 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.2005.23.5.375-384

Abstract

Penelitian ini bertujuan mengetahui pengaruh penggunaan tiga jenis perekat, yaitu lignin resorsinol formaldehida (LRF), tanin resorsinol formaldehida (TRF) dan fenol resorsinol formaldehida (PRF) dengan lama pengempaan yang berbeda terhadap keteguhan rekat kayu lamina dari kombinasi tiga jenis kayu, yaitu: tusam (Pillus merkusii), damar (Agathis sp.). dan gmelina (Gmelina arborea). Hasil penelitian menunjukkan bahwa jenis perekat, jenis kayu dan interaksinya maupun lama pengempaan masing-masing berpengaruh terhadap keteguhan rekat kayu lamina. Demikian pula interaksi antara jenis perekat dengan susunan jenis kayu, jenis perekat dengan masa kempa, jenis kayu dengan masa kempa, serta jenis perekat dengan susunan jenis kayu berpengaruh terhadap keteguhan rekat kayu lamina. Hasil uji kering menunjukkan bahwa keteguhan rekat tertinggi (110,88 kg/cm2) diperoleh dari kayu lamina yang dibuat dari kombinasi jenis kayu tusam, gmelina dan damar dengan perekat LRF yang dikempa selama 8 jam. Kayu lamina yang dibuat dari kombinasi jenis kayu tersebut yang diuji pada kondisi basah, memiliki keteguha tertinggi (43,73 kg/cm2) dengan menggunakan perekat PRF dan dikempa selama 15 jam. 
KAJIAN SISTEM PEMANTAUAN PEREDARAN KAYU BUNDAR Triyono P; Hariyatno D P
Jurnal Penelitian Hasil Hutan Vol 14, No 4 (1996): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1996.14.4.138-152

Abstract

The change of assessing  reforestation fund  (DR) and forest product fee (IHH) on logs from official assessment  lo self assessment  by  forest  concession  holder  also changed the  supervision of logs  flow.  The aim of this study  is;  1) lo compare the difference between old system and new system  and   2) lo see  how  the new system  of supervising  as  it operates in the field can be improved.The study  which  was  analysed  using  quantitative  and qualitative approach  showed  that despite of its disadvantage,  self assessment has some advantages with respect 10 flows  of logs because  of simpler  log administrative procedure.   However,  it  decreased  goverment  revenue because  of  illegal  logs and  the delay  in DR payment.   The new system  can  be  refined  by improving  the coordination and communication among  forestry  offices  so the  log flow  can bebetter supervised.Key word :  reforestation fund,  forest product fee, logs flow, official assessment, self assessment.
ANALISIS KIMIA SEPULUH JENIS BAMBU DARI JAWA TIMUR Gusmailina Gusmailina; Suwardi Sumadiwangsa
Jurnal Penelitian Hasil Hutan Vol 5, No 5 (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.1988.5.5.290-293

Abstract

 Chemical analyses  of ten bamboo   species   from   East  Java  has  been  conducted.   The  analyses  comprised   of  the determination  of  cellulose,  lignin,  pentosan,  ash,  extractives  and  the solubility   in one percent  of sodium  hydroxide.  These analyses  were  commonly conducted    to  determine basic  characteristics and  ultimate uses  of  wood.The  analyses showed  that the  cellulose  content ranges from  42.4  - 53.6 percent, lignin from  19.8  - 26.6 percent, and  pentosan 17.5  - 21.5  percent.   The ash  and  silica  content   varies from  1.24 - 3.77 percent and  from  0.10  - 1.78 percent, respectively: The  solubility  in cold water ranges from  4.5 -  9.9 percent,  in hot  water from  5.3  - 11.8 percent,   in alcohol  benzene ( 1 :2)  from  0.9 - 6.9  percent, and  in one percent   sodium  hydroxide   solution  from  22.2  -  29.8 percent.Based  on  chemical  analyses, especially the  cellulose  content, the  bamboos  from  East  Java appeared  to  be a good material  for pulp  and paper  industry.
BUDIDAYA JAMUR PERUSAK KAYU III. BUDIDAYA AURICULARIA POLYTRICA PADA DOLOK LIMA JENIS KAYU Sihati Suprapti
Jurnal Penelitian Hasil Hutan Vol 5, No 6 (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.1988.5.6.375-377

Abstract

Ear mushroom  (Auricularia polytrica) was cultivated  on logs of five  wood species, i.e. hamerang (Ficus grossularoides Burn.f.), jeungjing (Albizia  falcataria (L.) Fosb.), jirak  (Symplocos fasciculata Zoll.),  kihuut  (Vernonia arborea  Ham.)  and manii  (Maesopsis eminii Engl.). The  logs were  kept  slanted  on an angle of ± 60°  with  bamboo  supports  in a 1.5 m by 2 m room  roofed  with  bamboo plait,  at Bogor.  The mature  mushroom was harvested  daily after  the growth  of the fruiting  body.The  logs start  producing   fungus  two  months after  inoculation. The  highest  harvest  was obtained  at  fourth   month of  observation. The  average yield  per month  per  m3  of  log was obtained  from  kihuut (15.69  kg), jeungjing  (10.76 kg), manii  (9,46  kg),  hamerang  (8.59   kg) and jirak  (1.29 kg).After  seven  month   observation, an  average yield  of  1.05 kg log (kihuut), 0. 725 kg  (jeungjing), 0.556  kg  (manii), 0.349 kg  (hamerang],  and  0.125 kg (jirak)  were  obtained.   Relative   high  total  yield   of ear mushroom   during  the seven month   observation   was obtained  from  kihuut   (109.84 kg),  jeungjing  (75.285  kg),  manii  (66.202 kg),  hamerang (60.103 kg) and  the  lowest  total yield  was on jirak  (9.036 kg) per  m3  of  log.
PENGARUH KETINGGIAN DI ATAS TANAH DAN JARAK DARI EMPULUR TERHADAP BERAT JENIS DAN KADAR AIR KAYU AFRIKA (KHAYA ANTHOTHECA C.DC.) Suparman Nurwati; Edi Sarwono
Jurnal Penelitian Hasil Hutan Vol 5, No 6 (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.1988.5.6.315-320

Abstract

Khaya anthotheca  C.DC. is  one  of  exotic tree  species  selected   for   trial planting   in  Indonesia   by  the  Forest Research  Institute,   about  25 years  ago.This  paper discusses   the   result  of  a   laboratory   study   on   the  variation  of  wood   moisture content and  air dry specific   gravity   within   and  between  trees,  the  effects   of  height   from   the  ground  and  distance   from  pith   outward   on these  two  properties.   The  material for the  study   consisted   of  three  20  year  old  trees  of  Khaya  anthotheca  C.DC.  with  diameters   at breast  height  ranging from  38 - 41 cm, height  (until  top)  15 - I 7 m and clear bole length  from 9 -  9.5  meters.  The  trees were   felled  on plantation  site  at Cikole  (North  of  Bandung)   on  the  slope  of Mount Tangkuban  Perahu,  and  transported to  Bogor  for  laboratory testing.The  result  of  statistical   analyses  reveal,  non  significant   differences between trees  and  bolts  within   trees  for  air dry  specific  gravity,  and significant  difference   in the property   from  pith  outward.The  green   (fresh)  moisture  contents   on  the  other  hand  between   bolts  and  distance   from  pith  are significantly different. Regressions  relating the two properties  (air dry specific  gravity  and moisture  content)  as dependent variables with respective distance from pith   outward   being  1/3, 2/3, and  3/3  of the  radius,  and height  of  bolt  0.2, 2.7, 5.2, and 7.7 meters  above  the ground  as independent variables show  the following  :(1).S  =  0.436  -  0.017Z  +  0.003 Z2                                       =  (R=0.536)                       (Z =Height,   S =Specific gravity)(2).A =  99.98  -   3.591Z  + 0.224 Z2                                        = (R=0.466)                    (Z = Height,  A  = Moisture  content)(3).S =  0.396  + 0.018   X  + 0.044X2                                      =  (R=0.510) (4).A=  86.79  -   1.495  x   + 4.25X2                                         =  (R=0.101)               (X = distance  from  pith  outward)Test  of  significance  of  the  regression coeficient   (Table  4)  indicate  significant  F values for  the  first  two  equations (effect  of height)  and non significant  results for  the last two equations (effect  of distance  from pith).
ANALISIS.KERAPATAN JALAN HUTAN BERDASARKAN HASILPENAFSIRAN FOTO UDARA DAN SURVEl LAPANGAN: STUDI KASUS PT.INHUTANI II Ishak Sumantri
Jurnal Penelitian Hasil Hutan Vol 9, No 2 (1991): 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.1991.9.2.53-58

Abstract

Forest road network has a very important role in tranaporling logs fram the frest to processing site or logyard. The investigation of forest road density by using theaerial photo of l : 20.000 and 1: 60.000 scales had been conducted.The scope of the aerial photo is the second five-year working plan of PT. lnhutani 11 Pulau Laut, South kelimanten. The results are. as follows :1.Based on aerial photo interpretation, forest road density is 7,6 m/ha.2.Based on average skidding distance, and road construction and road maintenance costs, road denvities ha and 17,4 m/ha. respectively.3. Actual forest road density in PT. lnhutani II forest area is not optimum yet because it is far less than optimum values resulted from calculation based on average skidding distance and road construction and maintenance costs.

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