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Jurnal Penelitian Hasil Hutan
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Search results for , issue " Vol 8, No 4 (1990): Jurnal Penelitian Hasil Hutan" : 4 Documents clear
PERCOBAAN PENDAHULUAN PEMBUATAN SIRUP BERFRUKTOSA TINGGI DARIPATISAGU Wiyono, Bambang; Silitonga, Toga; Sijabat, Eduard A S
Jurnal Penelitian Hasil Hutan Vol 8, No 4 (1990): 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.1990.8.4.140-145

Abstract

The purpose of this work is to study the effect of isomerization time and dosage of glucose isomeraseenzyme on the high fructose syrups (HFS) properties of sago starch. The basic raw material of HFS was glucose which made by   the enzymatic acid hydrolysis process using hydrochloric  acid and amiloglucosidase enzyme  as catalyst. The isomerization time varied from  18, 24, and 30 hours. The amount of enzyme applied was consecutively 1.2, 1. 7, and 2.2 g/kg based on dry-weight of glucose syrups for each of the isomerization time.The result indicated that the isomerization time gave highly significant effect on the fructose content and on the degree of  eonueresion of  the fructose. The isomerization time also gave a significant effect on the dextrose equivalent. Increased isomerization time tends to give quadratic relationship with the dextrose equivalent, fructose content, and with the degree of conversion. Substituting and interpolating these quadratic equation, revealed that isomerization time of 24.66 to 25 hours, produced dextrose equivalent of 91.22 to 91.34, fructose content from 32.81 to 32.84 %, and degree of conversion of 36.17 to 36.34  %.  These value are somewhat lower than the minimum acceptable HFS requirements which posses .the sweetness level as invert sugar, for dextrose equivalent, fructose content and degree of conversion of 96,42 %.  and 50 %, respectively. Consequently, the HFS produced from sago starch rendered low sweetness level than that of the invert sugars.id
STRUKTUR ANATOMI SEBELAS JENIS KAYU DARI JAWA BARAT Rulliaty, Sri
Jurnal Penelitian Hasil Hutan Vol 8, No 4 (1990): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (12797.945 KB) | DOI: 10.20886/jphh.1990.8.4.117 - 126

Abstract

Anatomical   featuru    of  eleoen  wood  species from  West Java were examined  and compared  for identification   purposes.  The reaultll  show  that  each  wood  species ean be diBtinguished  one from  the other.  All fibers Nptate  is one chanu:temtic features  of family   Bwwraceae.    Tile celll pterospermum    types  distinguished   Planchonia   valida Bl. from  others  Species.Lit.sea rmna Hook.  has oil cellB, one  of  characteristic  features  of  family  Lauraceae.
PEMBUATAN ARANG AKTIF DARI TEMPURUNG BIJI-BIJIAN ASAL TANAMAN HUTAN DAN PERKEBUNAN Hudaya, Nurmala; Hartoyo, Hartoyo
Jurnal Penelitian Hasil Hutan Vol 8, No 4 (1990): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1783.232 KB) | DOI: 10.20886/jphh.1990.8.4.146 -149

Abstract

Research on µtilization of several seed shells of  Aleurites moluccana, Hevea brasiliensis, Canarium communne L and Cocos nucifera for activated carbon by  means of steam or ZnCl2 solution activat.ionwas conducted at the Forest• Product• Beaearch and Development Centre, Bogor.The results1howed that all kinds of raw material used could produce good quality and high yield of activated carbon. The yield  of activated carbon produced were re1pectively ranging from 81,1-87,0%   (Qmarium communne L.),66,4-77,1%  (Aleurites moluecana), 65,3-71,3%  (Hevea brasiliensis), 65,7-77,3%  {Cocosnucifera). The quality of activat- ed carbon determened by  adBorptive capacity of Iodine number need the• requirement as specified Standard of A WWA (1978)  i.e minimum 500 mg/g.
PERKEMBANGAN EKSPOR LAMPIT ROTAN DI PROPINSI KALIMANTAN SELATAN Irawanti, Setiasih
Jurnal Penelitian Hasil Hutan Vol 8, No 4 (1990): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3305.417 KB) | DOI: 10.20886/jphh.1990.8.4.127-133

Abstract

Floor mats iB  the main export commodity    from South  Kalimantan Province. The decrease of floor mats export demand from  thiB province since  the end of  1988  indicates the beginning of busine•  slow down period of (loolt.. mats.The study results using multiple regreBBion analysiB, showed that among four variablesi.e. yen exchange rute against the US dollar (X1),  interest rate in ~apan (Xa),  t. he Indonesian government po_l~  to su11_port e~port of (iniBhed products nattan (Xa)  ai1d  change of season in Japan (X4), ,only two variablesgave a szgnlficant impact on the floor mats esport volume (denoted by Y). These two variablesare the yen exchange rate against US dollar (X 1) and the season (X4.  The relationship can be expreued  by a multiple regresion equation as follows : In  Y  -  21.4608-3.0463   In x1-o.6206   In x2+0.2744 x3+0.7537 X4+E  with  the coefficient of  determination (R2)  of  0,6367.

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