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Articles 5 Documents
Search results for , issue "Vol 13, No 6 (1995): Jurnal Penelitian Hasil Hutan" : 5 Documents clear
SIFAT PEMESINAN ENAM JENIS KAYU INDONESIA Ginoga, Bakir
Jurnal Penelitian Hasil Hutan Vol 13, No 6 (1995): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1121.751 KB) | DOI: 10.20886/jphh.1995.13.6.246-251

Abstract

The quality of machining properties of six Indonesian wood species, i.e. meranti merah (Shorea selanica BI .), medang lesa (Cinnamomum parthenoxylon Meissn.), dahu (Draconto-melon mangiferum BI.), kaya (Khaya anthoteca Cdc.), bawang (Melia excelsa Jack.), and merawan (Hopea odorata , from Darmaga Experimental forest, has been investigated. The testing was carried out based on air dried specimen. The results revealed that the planing and moulding quality varies from good (II) to very good classes(1); turning and sanding belong to good class (II). while boring quality varies from medium (III) to good (II) classes.
PENGOLAHAN LEMAK TENGKAWANG DENGAN CARA PENGEMPAAN HIDRAULIK Wiyono, Bambang
Jurnal Penelitian Hasil Hutan Vol 13, No 6 (1995): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1354.258 KB) | DOI: 10.20886/jphh.1995.13.6.215-221

Abstract

Observations in this research were conducted in the IIIipe fat industry and in the laboratory. The observation in the fat industry was to get a clear discription of the fat processing of IIIipe nut, whilts in the laboratory was to study the extraction process of IIIipe fat with a hydraulic pressing technique. The pressure were conducted at several pressing levels: 25, 50, and 75 kg/cm2, at a pressing temperature of 50-60 oC for 20 minutes respectively.To produce IIIipe fats, the industry applies a combination technique of hydraulic pressure and hexane extraction. The yield of fat with this combination technique is around 40-50 %. However, the results of experiment in the laboratory showed that at an 50 kg/cm2 pressure produced yield of fat with a high quality indicated by the highest value of iodine number.
KAJIAN PENGGUNAAN KAPASITAS TRAKTOR KOMATSU D85E- SS DALAM UPAYA PENINGKATAN PRODUKTIVITAS PENYARADAN Endom, Wesman; Sukanda, Sukanda
Jurnal Penelitian Hasil Hutan Vol 13, No 6 (1995): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2911.461 KB) | DOI: 10.20886/jphh.1995.13.6.231-245

Abstract

This research was aiming at indentifying the tractor skidding capasity in logging operation in the natural production forest. The tractor observed was Komatsu D85E-SS. and in this study the specific gravity of 0.8 for all species was assumed.The results shows that the capasity of skidding was about 14. 7 ton or equal to 18, 40 m log. However, it was found that from 52 observations, 8% were done under the 20% capacity, 42% of the skidding were done under 21-40% capacity, 25% were done under 40% capacity and 8% were done by winching. .Those figures indicate that the skidder capacity has not yet fully utilized. Therefore, the possibility to increase the volume of skidding is widely open, meaning that the logging wastes can be overcome by skidding those above clear bole parts together with the main log.The cost of skidding per m3 compared with 20 years ago was found to be three times higher. The cost skidding per m3 was about Rp. 3225,- at the averege distance of 3,16 hm.
PEMBUATAN ARANG AKTIF DARI KAYU ACACIA MANGIUM DENGAN GASIFIKASI "FLUIDIZED BED" Hendra, Djeni; Pari, Gustan
Jurnal Penelitian Hasil Hutan Vol 13, No 6 (1995): 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.1995.13.6.252-257

Abstract

Experimental study on activated charcoal from Acacia mangium by using "fluidized bed" gasification is presented in this paper. Tire result shows that yield ranges from 14. 79 to 25. 03 %, moisture content from 9.17 to 14.42 %, ash content from 2.36 to 2.94, volatile matter from 7.44 to 9. 79 %, fixed carbon from 73.28 to 80. 71 %. adsorptive capacity of benzene from 1.38 to 18.56 % and adsorptive iodine from 511.37 to 961.87 %.Based on adsorptive capacity of iodine, the maximum activation reaction time is 45 minutes. At this time the adsorptive of iodine is 961.87 which meet American and Indonesian standard.
KAJIAN TEKNIS PRAKTEK UJI COBA SISTEM TEBANG JALUR DAN TANAM INDONESIA Tinambunan, Djaban; Sutopo, Sri
Jurnal Penelitian Hasil Hutan Vol 13, No 6 (1995): 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.1995.13.6.222-230

Abstract

The investigation of three concessionaires in Kalimantan practicing the trial of Indonesian Strip Cutting and Planting System was conducted in 1994. All the companies are in the early stage of the trial and, therefore, the focus of investigation is limited to trial preparation and timber harvesting with the aim of describing the real practices and various problems faced in the field.It is found that the productivity of each activity in preparation and timber harvesting in the Indonesian Strip Curing and Planting System (A) is lower than those in the Indonesian Selective Cutting and Planting System (B). The comparison of several productivities are as follows : (I) Felling: 47 cu. m/day forA and 85 cu. m/day for B: (2) Skidding : 37 cu.m/day for A and 85 cu.m/day for B; (3) Loading-unloading : 55 cu.m/day for A and 150 cu.m/day for B; (4) Hauling :. 50 cu.m/trip forA and 64 cu.m/trip for B. The above figures and observation in the field lead to the notion of several problems faced such as : (1) in matching the required strip direction and real field condition ; (3) improper skill of workers; (4) unsuitable wage system; (5) inability to utilize the small diameter logs; (6) too large cable used for skidding; (7) too large log clamp available on loader tractor: (8) difficulty in handling small diameter logs onto logging truck; and (9) high percentage of land area disturbed due to large equipment and strip width limitation.The trial is still in the early stage and the information is very limited and therefore, further investigations is strongly recommended to cover more locations and aspects so that the final results can be used by the authority to make sound conclusions in selecting the final arrangement of the Indonesian Strip Cutting and Planting System.

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