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Search results for , issue "Vol 13, No 5 (1995): Jurnal Penelitian Hasil Hutan" : 4 Documents clear
PENGARUH UKURAN BILAH KAYU SENGON TERHADAP BEBERAPA SIFAT PAPAN BlOK Sulastiningsih, l M; Sutigno, Paribotro; Iskandar, M l
Jurnal Penelitian Hasil Hutan Vol 13, No 5 (1995): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2180.091 KB) | DOI: 10.20886/jphh.1995.13.5.186-195

Abstract

Experimental blockboards (5-ply)were made of sengon wood (Earaserianthes falcataria) glued with urea formaldehyde. Thickness of veneers were 2 mm for face and back layers and 3 mm for cross core layer. The dimension of strip (core layer) divided into two different thickness (I cm and 1.5 cm) and three different width (0.7 cm; 2.5 cm and 7.6 cm). The blockboard properties were tested according to the Indonesian Standard (SNI), Japanese Standard (JAS) and Germany Standard (DIN) included moisture content, density, bending strength, moisture resistant bonding strength and delamination. The objective of this study was to determine the effect of strip dimension on some properties of sengon blockboard.The result revealed that the average density of sengon blockboard was 0.33 g/m3. The width of strip affected the thickness swelling and the length expansion of sengon blockboard but the width expansion. The thickness of strip affected the width and length expansions however did not affect the thickness swelling of sengon blockboard. The moisture resistant bonding strength of sengon blockboard with all treatments based on tensile strength and delamination tests met the SNI and JAS requirements. Compared with DIN Standard the sengon blockboard that met the bending strength requirement only that made of strip with 0. 7 cm in width and 1 cm thick. Indonesian Standard for blockboard does not require bending strength test.
MUTU DOLOK, RENDEMEN KAYU GERGAJIAN DAN KUALITAS PENGERJAAN KAYU AGATHIS (Agathis spec.) Ginoga, Bakir
Jurnal Penelitian Hasil Hutan Vol 13, No 5 (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.1995.13.5.169-175

Abstract

Log's tapering of agathis (Agathis spec.), rangesfrom 0.5% to 5.5 % and tends to be morre silindical at 200 cm above the butt.The circularity of logs is more than 80 %, with the range of 81 % to 97 % at the butt and 83to 98 % at the top end.Recovery of wet sawn timber is 69,7 % on average. and ranges from 50 % to 82 %. The average specific gravity in air dried condition is 0.44 (= 440 kg/m3) with the range from 0, 42 to 0, 46 (420 kg/m3 to 460 kg/m3).Working properties of agathis wood is classified as easy; planing and moulding quality are classified as good to very good, while boring property is classified as medium.
PENENTUAN NILAI MANFAAT EKONOMI TAMAN NASIONAL GUNUNG GEDE PANGRANGO SEBAGAI TEMPAT REKREASI Supriadi, Rabayu
Jurnal Penelitian Hasil Hutan Vol 13, No 5 (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.1995.13.5.196-214

Abstract

Indonesian economic growth as reflected by increase of per capita income, improvement of physical infrastructure and facilities as well as socio-economic and political condition have resulted in the increase of recreation demand. The Gede Pangrango Nasional Park is an example of such a forest recreation site with indigenous and exotic flora and fauna, its natural landscape of great beauty and other attractiveness and facilities could stimulate the visitors. As the park is easily reached from the surrounding cities like Jakarta, Bogor, Cianjur, Sukabumi and other cities of Java it seems that demand for recreation in this park is considerably increasing.The objectiveof this study are to get a better insight into the socio-economic aspect of the recreation in the park and to demonstrate the use of internationally accepted method, namely Travel Cost Method, to measure the economic value of the park.The demand equation and demand curve, the annual benefits (consumer's surplus). and the present value of the park have been estimated. The application of the Travel Cost Method (TCM) as a result of this study indicates that the participation rate of the recreation is 2,238 visitor per million inhabitants. The relationship between participation rate (V/P) and directc travel and time cost (TC) can be derived from the demand equation: V/P= -62,5 + 1675240/ TC2 with determinant coefficient, R2= 0.6362. This equation gives the estimated value of the annual benenfits of Rp 1.389 billion or an estimated value of Rp 17,370,- per visit. This is the amount of visitors' willingness to pay on average beyond what they actually pay. This amount gives also a present value of the park of Rp 25,55 billion as the economic value of the park providing recreational opportunity. This figure is based on the assumption that actual visit to the park continues to grow with 6.5 percent annually during the next 30 years and a discount rate of 10 percent, the time value is 50 percent of the hourly income, and are excluded extra cost likefor lodging and the equipment of tents. There will be upward bias due to multi-site visit, and downward bias because of visitors measure rather than day-visit.The expected increase in the number of visitors will place a tremendous pressure on the management of the park. Therefore,improved planning and management activities are needed. This will require an increase of the budget for planning and management to prevent a degradation of the attractiveness of die park. A degradation will mean that the park will lose its high economic value. Further study is recommended to get a more accurate figure of the economic value of the park by inclusion of substitute recreational site, multi-site visit, on-site travel time cost, and all expenses of visitors spent in the estimation of the benefits. 
FURFURILASI PADA KAYU TUSAM (Pinus merkusii Jungh. et de Vr.) DAN MANGIUM (Acacia mangium Willd.) Balfas, Jamal
Jurnal Penelitian Hasil Hutan Vol 13, No 5 (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.1995.13.5.176-185

Abstract

Wood specimens of tusam (Pinus merkusii Jungh. et de Vr.) and mangium (Acaciamangium Willd.) were air-dried to approximately16-18% moisture content. One group of the specimens was further oven-dried ttJ reach moisture content of 6-8%. Furfurylation was undertaken by soaking wood specimens/or 24 hours in a 98%.furfuryl alcohol solution containing 0.35% (vlv) of ZnCl2 as catalyst. Furfurylated specimens were then cured at 1 OO°C for 48 hours. Wood characteristics observed in this study include dimentional stability, hardness, compression strength and shear strength.Test results showed that the initial wood specimens of tusam had a higher radial but a lower tangential swelling rates than those specimens of mangium. Furfurylation could improve wood dimentional stability of both species by more than 90% on tusam and 75% on mangium.Values of hardness, compression strength and shear strength of tusam were markedly lower than mangium. After furfurylation, however, tusam had a greater hardness than mangium. Furfurylation could increase hardness, compression strength and shear strength of tusam by more than 94%, 83% and 76% respectively. A lower wood mechanical improvements were encountered with the mangium specimens.

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