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Articles 4 Documents
Search results for , issue "Vol 14, No 5 (1996): Buletin Penelitian Hasil Hutan" : 4 Documents clear
KEANEKARAGAMAN FOSIL KAYU DI BAGIAN BARAT PULAU JAWA Mandang, Y I; Martono, D
Jurnal Penelitian Hasil Hutan Vol 14, No 5 (1996): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7065.697 KB) | DOI: 10.20886/jphh.1996.14.5.192–203

Abstract

A preliminai y survey on wood fossil  was carried out at three fossil yards around Ciampea, Leuwiliang and  Jasinga,  West  Java.  The purpose  of the survey was to find  out the diversity of ancient trees of the respective areas.  Fossils examined were limited to those having diameter 30 cm up only.   Identification was made by examining anatomical features  which can be detected by the aid of a 10 x illuminated magnifier.  The results are as follows  : 81. 4 percent  out of 199 fossils  examined  are  belongs  to  Dipterocarpaceae;  among  those  dipterocarp fossils,   19.4 percent  are Dryobalanoxylon,   a  genus  which no longer has  extant living in the present  day natural forest of Java; non dipterocarp fossils  are less than those of dipterocarp;  among them are Alstonioxylon,   Calophylloxylon,   Dillenioxylon,   Ochanostachysoxylon, Tenninalioxylon,  and some fossil  of Leguminosae.   These  results  indicate  that some  time in the past,  during  some already gone epoch, the diversity of  trees  in  the west region of Java island was similar to the diversity of  trees  in Sumatera  and Kalimantan islands nowadays  where dipterocarp trees are relatively  abundant.   Further  study  on  the precisely  described  origin  and  accurately  dated  fossils  is highly recommended.Key words :    Dipterocarpaceae,   wood fossil, Java
PENGARUH PENAMBAHAN UREA DAN MELAMIN PADA PEREKAT UREA FORMALDEHIDA TERHADAP EMISI FORMALDEHIDA DAN SIFAT FISIS-MEKANIS PAPAN PARTIKEL Sutigno, Paribotro; Santoso, Adi
Jurnal Penelitian Hasil Hutan Vol 14, No 5 (1996): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6929.706 KB) | DOI: 10.20886/jphh.1996.14.5.178-191

Abstract

The formaldehyde  emtsston of particleboard  bonded  with  urea formaldehyde  (UF) can affect health, especially if it is used in a room with limited ventilation.  To reduce formaldehyde emission,  the glue can be mixed with catching agent.  In this report, the effect of using urea and melamine as catching agents on formaldehyde  emission,   and on the physical  and mechanical properties  of UF bonded particleboard is described.The effect of percentage  of catching agent on formaldehyde  emission is highly significant. The higher  the percentage  of catching agent,  the lower formaldehyde  emission of particle­board.  On urea­melamine  (U/M) ratio of  4,  the formaldehyde  emission of particleboard  can meet American  and Japanese  Standard on the percentage  of 5,  10  and 15%,  while on  U/M ratio of 7 and 10,  the formaldehyde  emission can conform the standards on the percentage  of 10  and 15%.   The effect  of addition of  urea and melamine  was significant and  even highly significant on the physical and mechanical properties,  but not on the shear strength.  The effect of U/M ratio was either not significant.Key words :  particleboard,  urea-melamine,  formaldehyde emission,  physical and  mechanical properties.
PENGAWETAN LIMA JENIS KAYU SECARA PELABURAN MEMAKAI DUA JENIS BAHAN PENGAWET Abdurrohim, Sasa
Jurnal Penelitian Hasil Hutan Vol 14, No 5 (1996): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4509.707 KB) | DOI: 10.20886/jphh.1996.14.5.204-210

Abstract

Five air dried timber species measured 2.5 x 5 x 10 cm was brushed by preservative in one of the broader side for four,  seven and ten times which similar with 1.25 g, 1.75  g and 2.25 g preservative.   The preservative  used  were Xylamon 5. 61  OC and  Cuprinol  118 L,  with the replication per  treatment were ten.  Two weeks after treatment preservative penetration  in all samples was measured.The  results  showed   that  the  preservative  penetration  of  all  treatment  did  not  mee trequirements for  timber housing. Additional brushing may be could improve penetration  and meet the standard but it will be costly. The cost offour,  seven and ten times brushing if appliedin door frame  are Rp  245,530,-  Rp.  343,742,-  and Rp.  44J,953,-  per  m3  with the price  of preservative Rp. 13,500,- per liter.Key words:  brushing,  Xylamon, Cuprinol, penetration
ANALISIS BIAYA PRODUKSI DAN NILAI TEGAKAN PENGUSAHAAN HUTAN ALAM : Kasus suatu perusahaan di propinsi sumatera selatan Effendi, Rachman; Setyowati, Yetti; Wahyuni, Tien
Jurnal Penelitian Hasil Hutan Vol 14, No 5 (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.1996.14.5.169-177

Abstract

The main source of revenue for forestry  development up to now still depends on natural forest  which is the main source of wood for  the industries. In the utilization of natural forest  the assessment  of  stumpage  value  is  important  to  determine  the profit  margin  that  goes  to goverment as well as to the concession holder.The  objective  of  this  study  is  to  get  clear  picture  on  the  cost  components  of forest concession and to know the stumpage value of forest  land.  To determine the stumpage value a production  cost analysis was done based on a year operation of concession holder.The  results  showed  that  the  cost  components  of  log production  consists  of planning, building main road and skidding road, road maintenance and log houling with total production cost Rp.  58.480,- per  m3 for felled  area of  1000 ha with production  of meranti and mixed species each 22.003,47   m3  and 7. 720, 78 m3,  respectively. Based on profit ratio 35% which went to concession holder there is still surplus which the goverment presently does not collect as forest   owner. Based  on  this  result goverment  revenue in  the forms  of  forest  product  fee, reforestation fund and concession fee can be increased up to 200% from present level.Key Word  : Natural  Forest,  Stumpage  Value,   Forest Concession, Production Cost, Forest Product Fee,  Reforestation Fund, Concession Fee.

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