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Jurnal Penelitian Hasil Hutan
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Search results for , issue " Vol 20, No 1 (2002): Buletin Penelitian Hasil Hutan" : 2 Documents clear
PENGOLAHAN DEKSTRIN SAGU (METROXYLON RUMPHII) SECARA ENZIMATIS Sudradjat, R; Yusnita, Erra
Jurnal Penelitian Hasil Hutan Vol 20, No 1 (2002): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4370.559 KB) | DOI: 10.20886/jphh.2002.20.1.55-69

Abstract

Sago tree (Metroxylon rumphii) is a potential source of starch and an important contributor of non timber forest products for foodstuff reserve because it has a high carbohydrate content particularly starch. The idea of converting sago starch into dextrin compound is to enhance wider use and increase the economic value of the this commodity. Dextrin has been known for its use as additives in textile industries, pulp/paper industries and pharmaceutical industries.A laboratory trial has been conducted to convert sago into dextrin harnessing the activities of particular enzymes. The aim of this trial was to figure out optimum condition of enzymatic sago-processing into satisfactory-quality dextrin, able to comply with the requirement of Indonesian National Standard (INS). The target is to obtain appropriate technology development in sago-derived dextrin.The result revealed that the optimum condition was obtained at substrate concentration of 25 percent with enzyme dosage at 0,9 gram per kg of substrate (dry-weight). In this condition, the dextrin solubility complies with the INS requirement; i.e 25 percent with enzyme dosage at 0,5 gram per kg of substrate (dry- weight).
PRODUKTIVITAS PENGELUARAN DOLOK KAYU TUSAM DENGAN SISTEM KABEL LAYANG IWAFUJI 115 Basari, Zakaria
Jurnal Penelitian Hasil Hutan Vol 20, No 1 (2002): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5668.764 KB) | DOI: 10.20886/jphh.2002.20.1.20-34

Abstract

This report deals with assessing the performance of  tusam (Pinus merkusii Jungh et de Vries)  log - removal using particular skyline system.  The assessment in this regard is pointed out by the aim of this study, i.e.   observing the productivity and operation cost of such removal.Related with those cases, investigation has been conducted and located in Cikajang Sub Forestry District,  Garut Forest District,  under the Indonesian State Forest Enterprise in West Java.  The  topographical location has a slope at about 5° - 50°  with altitude ranging around 900 - 1000 m above sea level.  The skyline machine used was a yarder manufactured in Japan with the brand name as "IWAFUJI" and engine power at115 HP.  The harvesting or removal of tusam  log was done using a clear-cutting system.The result revealed that the removal productivity varied from 25.07  to 43.17  m3  hm per hour with average at 33.33  m3 hm per hour. Meanwhile,  the corresponding production cost was Rp.  16,879.3 per m3.   It turned out that such productivity (Y) was significantly affected by real removal frequency  (X),  which further could be expressed in regression equation Y = 1.0659  + 0.1245 X (r=0.5852)  with F-calc = 4.15 greater than F-table = 2.1).  The opening soil was 5 percent.

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