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Jurnal Penelitian Hasil Hutan
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Articles 9 Documents
Search results for , issue " Vol 6, No 4 (1989): Jurnal Penelitian Hasil Hutan" : 9 Documents clear
PENETAPAN UKURAN SASARAN SEBAGAI USAHA PENINGKATAN EFISIENSI PROSES PENGGERGAJIAN Rachman, Osly; Balfas, Jamal
Jurnal Penelitian Hasil Hutan Vol 6, No 4 (1989): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4927.043 KB) | DOI: 10.20886/jphh.1989.6.4.215-219

Abstract

Two units of sawmill in Lampung (Sumatera) and three units in West-Java have been visited for the purpose of this study. Determination of target size on each sawmill was firstly done by collecting data from thickness measurements of 100 board samples. The data was then calculated using the most common formulas used for determining the lumber target size.The result of the study revealed that actual size produced by two sawmills surveyed were higher than target size, ranging from 1.08 to 1.58 mm. The actual size from three other sawmills were lower than target size, ranging from 0.26 to 2.18 mm. The sawmill A has apparently the best sawing capability. This was indicated by the smallest thickness range either within or between board i.e. 0.89 mm and 0. 79 mm. Meanwhile, its total sawing variation was smallest i.e. 0.49 mm.The result of this study was an indication that there is a need for improving the efficiency of sawing process through the application of target size determination.
PERCOBAAN FRAKSIONASI-DISTILASI MINYAK TERPENTIN DARI PINUS MERKUSII JUNG ET DE VRIESE Wiyono, Bambang; Silitonga, Toga
Jurnal Penelitian Hasil Hutan Vol 6, No 4 (1989): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4023.96 KB) | DOI: 10.20886/jphh.1989.6.4.231-234

Abstract

Turpentine  oil  was optained  from  rosin  factory   in Paninggaran,   Central  Java,  and  Sukun,  East  Java.   Both  samples were  separated   by  fractional  distilation   into  several  fractions.   The  distilling  was conducted   at boiling  temperature   with atmospheric   pressure.   The  boiling point   ranges  were  156  -   164°C  for  the  first  fraction;   164  -   167°C  for  the  second fraction;  167 -  170° C for  the third fraction;  and  170° C and  upward  for the residual fraction.The   results  indicated   that   the  amount   of  turpentine   fractions   from  Paninggaran  and  Sukun   were  consecutively 73.60%   and  70.0%  of  first  fraction:   1340%  and  15.80%   of  second  fraction;  3.17%   and 3.79%  of  third fraction;  and 9.97% and  9.86%  of  the  residual.  Based  on  the  boiling  temperature   of  each  component,    the  first  fraction   is assumed  to contain n-heptane,   p-thujene,    a-pinene,   and  camphene;   β-pinene    and  myrcene   in  the  second   fraction;  myrcene,   β-phellandrene, and  ∆3-carene  in  the  third  fraction;  and  the  residual  fraction   contains,   β-phellandrene. ∆3-carene,   p-cymene,   limonene, ά-and ɤ-terpinene,  etc.   The  major  components    of  turpentine   oil are ά-and β-pinene.   These  components    can  be obtained by  decreasing  the  boiling  range to  154  -   158° C for  ά-pinene   and  164  -   166° C for  β-pinene.  The  fractional   distillation with   these  temperatures   is expected   to  increase  the  utilization   of  turpentine   as raw material  for  synthetic pine  oil,  perfumery,   etc.
PENGARUH PRAHIDROLISIS TERHADAP KUALITAS PULP RAYON ACACIA MANGIUM WILLD Siagian, Rena M; S, Jefri R; T, Bedyaman; Purba, Kayano
Jurnal Penelitian Hasil Hutan Vol 6, No 4 (1989): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5441.67 KB) | DOI: 10.20886/jphh.1989.6.4.262-267

Abstract

Rayon grade pulping trials from Acacia mangium Willd have been studied with variation in pH and prehydrolysis time.Sulphuric. abid, water and sodium hydroxide were used as prehydrolysing agent at pH 4, 7, and 10 each were prehydrolized.for 30,and 60 minutes at 160°C. Following the prehydrolysis, the suphate pulping was conducted by using the active alkali 16%, sulphydity 25%. The maximum temperature was 170°C maintained for 90 minutes. The resulting pulps were bleached by C-E-H-E-H bleaching system and finally acidified with hydrochloric acid.The yield of unbleach pulp ranging from 37- 43% and permanganate number from 8.5 to 10.4.The increase of the prehydrolysing pH from 4 to 10 will decrease alpha cellulose content and viscosity while the beta, gamma cellulose content and alkali solubility tend to increase.The pulping trials under prehydrolysis pH 4 for 60 minutes of Acacia mangium gave the best alpha cellulose yield and lowest hemicellulose and ash content.
PENGARUH LAMA PERENDAMAN PANAS DALAM PENGAWETAN LIMA JENIS KAYU DENGAN METODE RENDAMAN PANAS DINGIN Permadi, Pipin; Barly, Barly
Jurnal Penelitian Hasil Hutan Vol 6, No 4 (1989): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4544.669 KB) | DOI: 10.20886/jphh.1989.6.4.220-224

Abstract

Wood preservative penetration and retention on five wood species using hot and cold bath process was studied. Wood samples measuring 5 cm x 5 cm x 60 cm were immersed in BFCA preservative solution under temperature of 70° C for nil (control), one, two and three hours then cooled for a day.The result indicates that red meranti (Shorea platycados V.Sl .) is more permeable compared with other species (bangkirai, bungur, damar laut and kapur). In red meranti, one hour immersion in hot preservative yields penetration which conforms with the SKI C-bo-008 Standard for wood building, whereas in other 4 species, the treatment does not seem to be more superior. compared with cold immersion method.
MORFOLOGI LUBANG GEREK DAN PERKEMBANGAN KUMBANG AMBROSIA XYLEBORUS SP. YANG DIPELIHARA PADA MEDIA BUATAN Sukartana, Paimin
Jurnal Penelitian Hasil Hutan Vol 6, No 4 (1989): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4342.409 KB) | DOI: 10.20886/jphh.1989.6.4.250-254

Abstract

Females of ambrosia beetle Xyleborus sp., one of the most destructive wood boring insects on lone logs (Pinus merkusii), were reared on rubberwood sawdust base media. The media were frepared in test tubes and one famale pertube was then introduced. These cultures were maintained in a dark room at 28°C and 70 % RH for 40 days. Observations were made for number of branches and length of galleries system through the tube walls, and number of progenies produced by the beetles after the media were dissected.It was shown that of the 22 culture tubes, 18 tubes were developed. Most of the beetles extensively tunneled to and fro criss-cross within the media. Mean branch number and gallery length were 16. 7 junction and 46.4 cm tracks ranging 0 - 33 and 0 - 52 respectively. The average of progeny number was 47.9 per tube with one male for about 14. 7 females. It seemed that both number of branches and length of galleries system indicatively correspond to the level of the beetle fecundity.
PRODUKTIVITAS DAN BIAYA PENGANGKUTAN TIGA JENIS TRUK ANGKUTAN KAYU DI TIGA HAK PENGUSAHAAN HUTAN DI KALIMANTAN BARAT Sukanda, Sukanda; Dulsalam, Dulsalam; Sumantri, Ishak
Jurnal Penelitian Hasil Hutan Vol 6, No 4 (1989): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7113.173 KB) | DOI: 10.20886/jphh.1989.6.4.238-245

Abstract

An investigation on hauling productivities and hauling costs of three types of log hauling trucks was carried out at three logging companies in West Kalimantan in 1988. Three types of logging trucks, i.e. Nissan with semi trailer, Berliet with semi trailer and Nissan truck, were observed. The productivities of trucks were gathered through time study while the hauling costs were calculated based on secondary data. The purpose of the investigation is to find hauling productivities, operating costs of trucks and hauling costs.The results of the investigation are as follows :The average hauling productivities of Nissan with semi trailer, Berliet with semi trailer and Nissan trucks are 484,99m3 km/hour, 492,02 m3 km/hour and 292,07 m3 km/hour, respectively .The average hauling costs of Nissan with semi trailer, Berliet with semi trailer and Nissan Trucks are Rp. 63,08/m3 km, Rp. 64,66/m3 km and Rp. 84,39/m3 km, respectively.The differences in both the hauling productivities and hauling costs either between Nissan logging truck with semi trailer and Nissan loging truck or between Berliet logging truck with semi-trailer and Nissan logging truck were highlysignificant because of the differences in logging truck capacities, transport distances and driver skills. But the hauling productivities and hauling costs between Berliet logging truck with semi-trailer and Nissan logging truck with semi trailer did not differ significantly because the logging truck capacities, transport distance and driver skill in PT. Kawedar are comparatiuely simmilar to those in PT. Erna Juliawati.Hauling costs by using smallar trucks are more expensive than those by using larger trucks
PENGARUH PENAMBAHAN PUPUK TERHADAP PRODUKSI JAMUR TIRAM Suprapti, Sihati
Jurnal Penelitian Hasil Hutan Vol 6, No 4 (1989): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5297.72 KB) | DOI: 10.20886/jphh.1989.6.4.226-230

Abstract

The media used in the experiment were sawdust of eight wood species mixed with 1% calcium carbonate (CaC03), 1% gypsum, 0.5% fertilizers i.e. urea, ammonium sulphate (ZA), KCL, NPK and trisuperphosphate (TSP) and distilled water, respectively. The substrate was cooled after autoclave sterilization before being inoculated with pure culture of oyster mushroom. The mature mushrooms were harvested daily after the growth of fruiting body.The media started producing mushroom two months after inoculation (28 - 45 days). The highest yield was obtained from rubberwood sawdust mixed with ZA (362.43 g) and the lowest yield was on teak sawdust containing urea (90.14 g) per 500 grams media. Media from rubberwood, weru, jeungjing and pulai sawdust were suitable for mushroom culture. Fertilizer supplement seems to improve mushroom yield. ZA, urea were more effective than KCL fertilizer for mushroom production.The average Biological Efficiency (BE) of entire treatments was 84.32% (35.25-140.23%). The relatively high BE was obtained from weru, rubber and jeungjing and the lowest BE was on teak sawdust media.
PENGAWETAN BATANG AREN DENGAN BAHAN PENGAWET TIPE CCA, CCB, DAN BFCA Barly, Barly
Jurnal Penelitian Hasil Hutan Vol 6, No 4 (1989): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3213.474 KB) | DOI: 10.20886/jphh.1989.6.4.246-249

Abstract

Aren timbers are suspectible to wood detercrating agents especially when used in contact with ground and/or exposed to the weather. Therefore, proper treatment is neccessary to protect them from insects and decaying organisms. The success of aren timber treatment depends on wood structure, treatment processes, and other factors.Treatment schedules of different processes were established through a series of experiment. For example, longer pressure period and higher preservative concentration are more suitable for products used in contact with ground than those used outdoor or without contact with the ground. In Anonymous (1987), the target CCA retention ranges from 3.3 to 10.6 kg/m3, and CCB from 6.4 to 11.4 kg/m3, and BFCA from 6.0 to 8.6 kg/m3, depend on preservatives and end products.The experimental results indicate that the retention of preservatives exceeds the minimum values of specification. Recomended treatment schedules for each process are presented.
HUBUNGAN ANTARA BERAT JENIS DAN INTENSITAS SERANGAN PENGGEREK KAYU DI LAUT TERHADAP BEBERAPA JENIS KAYU HUTAN TANAMAN INDUSTRI Muslich, Mohammad; Sumarni, Ginuk
Jurnal Penelitian Hasil Hutan Vol 6, No 4 (1989): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3656.212 KB) | DOI: 10.20886/jphh.1989.6.4.268-271

Abstract

Many factors determine the susceptibility of wood to marine borer attack. It is thought that one of them is the specific gravity.A study on the relationship between wood specific gravity and the intensity of marine borer attack was conducted in the seashore of Rambut Island (in Java Sea) in 1988. Samples were made of woods of industrial plantation forest species with the size of 30 cm long, 5 cm wide and 2,5 cm high. The samples were randomly arranged like a raft and put inside the sea. They were observed after three months.The results reveal that specific gravity asertain the intensity of marine borer infestation, except Tectona grandis, Tectona grandis 12 the most resistant to marine borer attack although its specific gravity is lower than Eucalyptus urophylla, Altingia excelsa, Acacia mangium and Pometia pinnata.

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