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Articles 6 Documents
Search results for , issue "Vol 2, No 2 (1985): Jurnal Penelitian Hasil Hutan" : 6 Documents clear
PENGARUH BEBERAPA FAKTOR PENGOLAHAN TERHADAP SIFAT ARANG AKTIF Sudradjat, R
Jurnal Penelitian Hasil Hutan Vol 2, No 2 (1985): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3347.034 KB) | DOI: 10.20886/jphh.1985.2.2.1-4

Abstract

Variables used in this investigation are wood species (Jelutung and keruing), carbonization temperatures (400°C and 500°C) and activators (CaCl2, MgCl2 and ZnCl2). The parameters observed were yield, moisture content, ash content, iodine and benzene adsorption. This investigation reveals that the highest yield obtained from keruing wood, CpCl2 activator at carbonization temperature of 400°C. The lowest moisture content charcoal obtained by using processing temperature of 500°C. Jelutung wood with MgCl2 activator had the lowest moisture content compared to that of ZnCl2 activator. The highest iodine adsorption obtained when using ZnCl2 activator and carbonization temperature of 500°C (for keruing wood). It was found that high benzene vapor adsorption charcoal could be produced by using ZnCl2 activator, carbonization temperature 500°C and Jelutung wood as raw material.Sunbury, H.M. (1923). The destructive distillation of wood. Ben Brother, Ltd., London.Hartoyo (1975). Arang aktif, pembuatan dan penggunaan. Kehutanan Indonesia.Sudradjat Prawirakusuma dan Tjipto Utomo (1972). Pembuatan Arang Aktif. Lembaga Kimia Nasional. LIPI Bandung.
SIFAT PENGERINGAN ALAMI DAN PENGERINGAN SINAR MATAHARI Hidayat, Syarif; Karnasudirdja, Suparman
Jurnal Penelitian Hasil Hutan Vol 2, No 2 (1985): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3806.933 KB) | DOI: 10.20886/jphh.1985.2.2.5-9

Abstract

The study reported here concerns the drying rate expressed in daily moisture content decrease and the associated defects.Based on moisture content decrease data, the wood species studied were grouped into 3 classes, namely  easy,  moderately  easy  and  difficult to dry.  Easy to dry species include durian burung (Durio carinatus)   and mabang (Shorea pachyphylla),   moderately easy to dry include meranti bunga (Shorea aliginosa),  gerunggang (Cratoxylon arborescens),   rengas (Melanorhoea walichii),  mengkakal (Callophyllum sculatri),  bintangur (Callophyllum  sp.),  pisang­pisang (Mezzetia paviflora)  and perupuk (Blumedendron subrotundifolium).    Difficult to dry species include resak (Cotylelobium flarum)  and empedu (Dryobalanops fusea).Based on drying defects, wood species fall  into 3 classes namely light (pisang­pisang and mabang),  intermediate (meranti bunga, durian burung, rengas,perupuk, bintangur and empedu) and excessive(resak and gerunggang).
VOLUME DAN KLASIFIKASI LIMBAH PENEBANGAN PADA BEBERAPA PENGUSAHAAN HUTAN DI ACEH DAN KALIMANTAN TIMUR Simarmata, Sampe Radja; Dulsalam, Dulsalam
Jurnal Penelitian Hasil Hutan Vol 2, No 2 (1985): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2361.406 KB) | DOI: 10.20886/jphh.1985.2.2.17-19

Abstract

A study on volume and classification of logging waste has been carried out in several forest companies in Aceh, North Sumatra, and East Kalimantan.  Average wood waste volume at the logged over areas having diameter range from  10 to 39  cm with one meter in length or more were measured using the Brereton method.The results of this investigation reveal that:I. Logging waste volume in Aceh range from 26,46  to 29,08  m3/ha  with an average of 27,85  m3/ha.  In North Sumatra the value ranges from 22,94  to 38,66  m3/ha  with an average of 28,90  m3/ha.  It  was formed  that in East Kalimantan  the logging waste ranges from22,00  to 81,94 m3/ha with an average of 52,38 m3/ha.2. The average wood waste at felling site was higher in the forest companies in East Kalimantan.3. Logging waste consists predominantly of those classified as 10 to 39 cm in diameter with 4 m length or more.4. The average volume of logging waste classifiedas 10 to 19 cm in diameter with 4 m length of more in Aceh, North Sumatra and East Kalimantan are consecutively 17,5 m3/ha,16,9 m3/ha and 24,9 m3/ha.
PENGANGKUTAN KAYU DENGAN TRUK DI KPH BOJONEGORO DAN SARADAN Sianturi, Apul; Dulsalam, Dulsalam
Jurnal Penelitian Hasil Hutan Vol 2, No 2 (1985): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2911.047 KB) | DOI: 10.20886/jphh.1985.2.2.13-16

Abstract

An observation on wood transportation by truck has been carried out in the Bojonegoro and Saradan Forest Districts.  Trucks are MercedesBenz, consistingof models rangingfrom 1970 to 1975.The annual operation days of truck at the Bojonegoro and Saradan Forest Districts are 147 and 193  days respectively. The average annual hauling capacity of trucks in Bojonegoro and Saradan is 14 964 ton­km per year and 41 145 ton­km per year respectively.The average hauling cost in Bojonegoro and Saradan is Rp.  300,­  per ton­km  and Rp.  107,­ per ton­km respectively.  This cost is broken down into the following components: Fuel, 9 percent; grease, 9 percent; spare parts,  55 percent; tyres,  23 percent; miscellaneous, 4 percent.
BEBERAPA MACAM PERLAKUAN TERHADAP PENYADAPAN AGATHIS SPP. UNTUK MENINGKATKAN BASIL GETAH Dulsalam, Dulsalam; Surnantri, Ishak
Jurnal Penelitian Hasil Hutan Vol 2, No 2 (1985): 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.1985.2.2.10-12

Abstract

An  investigation into tapping of Agathis  spp.  using several methods has been carried out in Malang Forest District,  Unit II Perum Perhutani, East  Java,  in 1983.  The  methods are designed  to  increase resin yield per  unit time by manipulating tapping time, duration and covers and orientation.The investigation reveals that:1. Average resin production of the Agathis  spp. for  one week to two weeks times using of black and white plastic covers are respectively 9,85  gram/tree and 9,61 gram/tree. Without plastic cover the yield is 7, 76 gram/tree, shightly lower then when they are covered.2. The application of black plastic cover at tapping his significantly  increased the yield up to 26,9%  and those covered with white plastic of 23,8"7o.   In both cases the resin yield is significantly higher compared to result obtained  when tapping was carried out without cover.3. Average resin yield at tapping face  oriented to in east and west from  one to two  weeks  are 7,48  gram/tree and 11,26  gram/tree, respectively.4. The tapping face oriented to the west increases the resin yield up to 50,5%  compared with that oriented to the east.5. The average resin yield for  one and two  week are respectively 8,57  gram/tree and 9,95  gram/tree.  Duration of  tapping of  the Agathis  spp. for one and two week does not effect the production level.  Therefore 2 week tappin~ is not recomended.
PENGARUH KOMPOSISI PEREKAT TERHADAP EMISI FORMALDEHIDA DAN KETEGUHAN REKAT KAYU LAPIS sutigno, paribotro; sumadiwangsa, suwardi
Jurnal Penelitian Hasil Hutan Vol 2, No 2 (1985): 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.1985.2.2.20-25

Abstract

One of  the drawbacks using plywood bonded with urea formaldehvde ( UF) is formaldehyde emission, especially in a room with limited ventilation such as mobile homes. Some countries have imposed restriction on the  limit of formaldehyde emission for certain uses.This work deals with the effect of  hardener and extender types on formaldehyde emission and on bonding strength of  the UF bonded plywood.The effect of  hardener mixed with catching agent on formaldehyde emission is positive,  i.e.   lower the formaldehyde emission at the same time lower the bonding strength.   The effect of extender types were not significant.  The interaction between hardener types and extender types were highly significant. This effect, however,  was not consistent since its effect on the bonding strength was highly significant in one type of hardener only.

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