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Jurnal Penelitian Hasil Hutan
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Articles 3 Documents
Search results for , issue " Vol 1, No 4 (1984): Jurnal Penelitian Hasil Hutan" : 3 Documents clear
PENGARUH TINGKAT IRADIASI TERHADAP SIFAT FISIS DAN MEKANIS KAYU KARET YANG DIIMPREGNASI DENGAN POLIESTER STIREN Ginoga, Bakir; S, B Sipayung; Karnasudirdja, Karnasudirdja; Suyitno, Suyitno
Jurnal Penelitian Hasil Hutan Vol 1, No 4 (1984): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (11635.342 KB) | DOI: 10.20886/jphh.1984.1.4.1-7

Abstract

 The  effect of irradiation level i.e.  two megarad (20 KGy), four  megarad (40 KGy) and six megarad (60  KGy) pre impregnated with polyester styrene was investigated on  rubber wood  (Hevea brasiliensis Muell.  Arg.). The samples were obtained from  locally cultivated rubber trees at  Jasinga subdistrict, Bogor, West Java. The treated wood properties tested include airdry density, hardness, compression parallel to the grain, compression perpendicular to the grain and impact bending strength, using the method described in ASTM D 143-52 (Anom., 1976).  The swelling and shrinkage test specimen was 5.0 cm x 5.0 cm x 1.5 cm block and of 5.0 cm x 5.0 cm x 3.5 cm for water absorption determination.The test results revealed that irradiation treatment were highly significantly increase density, hardness, compression parallel to the grain and compression perpendicular to the grain, but  decrease swelling, shrinkage and  water absorption. Meanwhile, shrinkage and swelling on radial direction, and impact bending strength showed non-significant difference (P  ≥ 0.05).It is also concluded that irradiation of two megarad (20 KGy) increase the density, hardness, compression parallel to the grainand compression perpendicular to the grain by one and half  fold compared to untreated specimens. On the other hand, water absorption, swelling and shrinkage for tangential direction decrease to about the same magnitude when treated with the same level of irradiation compared to untreated ones.Impact bending strength showed non-significant difference for all treatment levels.
PENGARUH KONDISI PENGGORENGAN TERHADAP KUALITAS ROTAN MANAU (CALAMUS MANAN MIQ.) Rachman, Osly
Jurnal Penelitian Hasil Hutan Vol 1, No 4 (1984): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2403.409 KB) | DOI: 10.20886/jphh.1984.1.4.14-19

Abstract

The  effect  of  cooking  condition  on  the  quality  of rattan  is presented in  this article.  Round     fresh   manau   rattan  samples, each  of 100 cm in length and 3 cm in diameter were 80 stems  in all.The samples  were devided  into  4 groups before cooking. Each  group was cooked  with four different oil mixtures and four levels of cooking time.The results  reveal  that  the composition  of cooking  oils has a significant   effect  on  the  cane  color and  compressive strength  parallel to grain. but has no effect  on shear strength  of the rattan.The  mixtures  containing  coconut oil tends to reduce the  rate  of rattan  skin  color change  during  cooking.  Also,  such composition produced  better rattan skin  color in comparison with those treated with others.
PRODUKTIVITAS ANGKUTAN LORI DORONG DI HUTAN JATI Sianturi, Apul
Jurnal Penelitian Hasil Hutan Vol 1, No 4 (1984): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (10740.843 KB) | DOI: 10.20886/jphh.1984.1.4.20-23

Abstract

 A study on the productivity of lorry transportation in the teak forest was carried out in 1982, at  three forest  Districts. Time study have been conducted for this purpose.The Study shows that:Log loading productivity of a 6-men crew are 2.2, 1.7, and 1 m3 per hour in the Bojonegoro Mantingan, and Blora Forest Districts respectively with an average of 1.6 m3 per hour.Loading capacity of one lorry varies from 2. 6 to 4.7 m3 of logs with an average of  3.6 m3.Lorry speed varies from 5.7 to 8.6 km per hour, with an average of 6.9 km per hour.Unloading productivity varies from 5.6 to12.9 m3 per hour, with an average of 7.5 m3 per hour.Hauling cost varies from Rp. 86 to Rp. 92 per m3km, with an average of Rp. 88 per m3 km. 

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