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Jurnal Penelitian Hasil Hutan
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Articles 5 Documents
Search results for , issue " Vol 22, No 2 (2004): Jurnal Penelitian Hasil Hutan" : 5 Documents clear
SIFAT-SIFAT KOPAL MANILA DARI PROBOLINGGO, JAWA TIMUR Waluyo, Totok; Sumadiwangsa, E S; Hastuti, Pudji; Kusmiyati, Evi
Jurnal Penelitian Hasil Hutan Vol 22, No 2 (2004): 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.2004.22.2.87-94

Abstract

Manila copal is originated from the exudate of Agathis sp. trees, which flows out through the tapping stimulation. Manila copal from Indonesia nowadays prevails nearly 80-percent share in the world market. One of the potential regions that produce manila copal in Indonesia is situated in Probolinggo, East Java.The manila copal as such reveals particular physical and chemical properties and then is categorized as superior (U1) and primary (P) qualities, exemplified consecutively: color magnitudes at JO YR 813 (light gray) and 2.5 YR 611 (reddish gray), impurities 9.7 percent and 23.3 percent, softening point 144°C and 149°C, ash content 0.2 percent and 9.2 percent, acid number 244 and 209, saponification number 309 and 245, and specific gravity 0.91 and 0.88, respectively.The qualities of Manila copal from Probolinggo is poor in qualities and could not meet Indonesian National Standard, particularly due to high impurities. 
ANALISIS BIAYA PEMANENAN KAYU BULAT SISTEM KEMITRAAN HPH - KOPERASI DESA DI KALIMANTAN TENGAH Basari, Zakaria
Jurnal Penelitian Hasil Hutan Vol 22, No 2 (2004): 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.2004.22.2.113-122

Abstract

To minimize illegal logging in natural production forest, one of concession forest in Kalimantan has initiated to do a joint bussines logging with a community wellfare cooperative. The aim of the study was to measure productivity of extraction, operation cost, joint bussines income, investament and income of Koperasi Desa.The observation area was located at PT Tanjung Raya Intiga (PT TRI), Barito Hulu Puruk Cahu Forest District, of Central Kalimantan Province in 2001.The results showed that logging production achieved was 892,9 m3, log extraction productivity 99 m3. hm/hour, operation cost Rp 14,227/m3, logs selling revenue Rp 31,235,950,-, investment cost Rp 2,901,017.- and cooperative income Rp 28,901,017.-.The financial income was distributed to local community (34%), wages for cooperative bussines managers (29%), village contribution (4,5%), administration fee for cooperative (5%) and government officers (27%).The local people and the forest concessioners could share the benefit of cooperation in naturalproduction forest management.
SIFAT PULP SULFAT KAYU KURANG DIKENAL ASAL JAWA BARAT Siagian, Rena M; Lestari, Setyani B; Yoswita, Yoswita
Jurnal Penelitian Hasil Hutan Vol 22, No 2 (2004): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6419.293 KB) | DOI: 10.20886/jphh.2004.22.2.75-86

Abstract

This paper deals with the results of a laboratory-scale manufacture of sulphate pulp from lesser known wood species from West Java in the possible utilization as a raw material for pulp with the emphasizes on yield, pulp processing properties and physical properties. There arefive wood species experimented, i.e. marasi (Hymenaea courbaril L.), asam jawa (Tamarindus indica L.), balobo (Diplodiscus (?), kundang (Ficus variegata Bl.) and kendal (Ehretia acuminata R.Br.).The results revealed that marasi, asam jawa, kundang, and kendal wood species could produce pulp with the yield commonly in the range as obtained from sulphate process, i.e. 40 - 55 percent. The lowest pulp yield (less than 40 percent), however, was obtained by balobo species. The favorable delignification with the low Kappa number in the resulting sulphate pulp only occurred to asam jawa wood species. Meanwhile, the other four wood species in the sulphate process proceeded with less favorable delignification and concurrently produced pulp with high Kappa number.When viewed from the pulp yield, Kappa number, and active alkali consumption, only asam jawa wood species seemed suitable for producing bleached pulp. Conversely, the other four species appeared to be unsuitable for bleached pulp. To acquire their suitability, hence, those four species should be cooked in the sulphate process under a more enhanced condition.The properties of the unbleached pulp from those five wood species were in the ranges of 42 -61 Nm/g for tensile index, 6.52 - 12.38 Nm2/kg for tear index, 2.47 - 3.20 KPa.m2/g for burst index, and 3.64 - 8.16 df for folding endurance.Viewed from physical properties that covered tensile, burst, and tear index, it turned out that balobo-wood (Diplodiscus (?)) pulp afforded the highest physical properties followed by those of kundang (Ficus variegata Bl.) and marasi (Hymenaea courbaril L.) wood species. Meanwhile, the lowest physical properties of the pulp sheet were obtained from asam jawa (Tamarindus indica L.) and kendal (Ehretia acuminata R.Br.) woods.
KAJIAN PENGGUNAAN LAHAN HUTAN DAN PERUBAHANNYA MENGGUNAKAN DATA CITRA SPOT LANDSAT DAN RADAR Endom, Wesman; Haryono, Haryono
Jurnal Penelitian Hasil Hutan Vol 22, No 2 (2004): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (8931.641 KB) | DOI: 10.20886/jphh.2004.22.2.95-111

Abstract

To enhance effectiveness of natural resources evaluation an assessment on the trend of land- use and its impacts is necessary. This is needed by regions which are interacted each others and covering large areas. A remote sensing technology is a reliable and appropriate choice for such area. A study on the land-use assessment was employed using manual method through the implementation of Spot, Landsats, and Radar imageries. The results were as follows:1) Until the year 1980, the concession area situated at Long Nah, administratively under authority of PT Inhutani I. East Kalimantan were mostly still covered by virgin forest with occasional and scattered small villages2)  Manual interpretation using imageries of Spot, Landsats and Radars disclosed the following results: (a) Spot imageries turned out to be 64. 7% as the correct figure and 35.3% as the false figure;, (b) Landsat imageries interpreted 53.3% as correct and 46.7% as false; (c) Radar imageris conducted in March and April 1998 revealed 38. 1% as correct and 61.9% as false.3) Changes forest land-use during the period 1980-1998 occurred in low-land dry forest andpartly in swampy forest, which were further converted to the plantation forest. Meanwhile, the changes for other land-uses among others agriculture were almost insignificant ( less than 3%). This is because soil layers in the corresponding land were thin and acidic rendering unsuitable for agriculture activities.4)  In order to reduce high commission error, the appropriate number of strata relevant to the land-use interpretation should not be too detailed but adequately established as simply aspossible.
PENGARUH TEPUNG GAPLEK DAN DEKSTRIN SEBAGAI EKSTENDER PEREKAT UREA FORMALDEHIDA TERHADAP KETEGUHAN REKAT KAYU LAPIS KAPUR Santoso1, Adi; Sutigno2, Paribotro
Jurnal Penelitian Hasil Hutan Vol 22, No 2 (2004): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4208.65 KB) | DOI: 10.20886/jphh.2004.22.2.61-68

Abstract

Urea formaldehyde resin is an adhesive for interior plywood manufacturing. Some materials can be added to the resin to reduce the glue utilization. This paper describes a study on the effect of extender addition to urea formaldehyde resin on the bonding strength of kapur (Dryobalanops sp.) plywood. This research used cassava flour and its dextrin as an extender with 3 percentage levels of extender i.e.: 10 %, 30%, and 50% based on weight of liquid resin. Each extender type has refinement of 100 and 200 mesh.The results showed that the effect of extender type on plywood bonding strength was not significant, while the percentage of extender has highly significant effect on the plywood bonding strength. The higher the extender percentage the lower the plywood bonding strength. Cassava flour 30% and its dextrin for extender meet the Japanese standard.

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