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Search results for , issue "Vol 8, No 4 (1990): Jurnal Penelitian Hasil Hutan" : 6 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 | Full PDF (2328.856 KB) | 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 reaul'tll  show  that  each  wood  species ean be diBtinguished  one from  the other.  All fibers N'ptate  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 (loo'lt.. 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.
SIFAT VENIR DAN KAYU LAPIS 8 JENIS KAYU DARI SULAWESI TENGAH Jslrandar, M I; Kliwon, Suwandi; Sutigno, Paribotro
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.1990.8.4.150 - 156

Abstract

A muly  reault on? the suitability  of 8 wood 1peciesfrom Central Sulawesia  raw  material-for veneeri and plywood  iB re~rted   in ~hiB paper. 1'ae ?tudy cons!ited of log peeling characteristic, veneerpropgty 'and  tome phy~cal/mechanical AU  of  ita.  lo,. Tram wood  speciu  could  be peeled in cold c0ndition, producing 0.9 mm and 1.6  mm veneer at propertitia  of plywood  (tripl?     and multiplaa cuffln6 angle between 910  -   92080'.                      ?                                                       -                                                                            .7'le average111rinkage of  veneer iB   6.27%,  with  a minimum of 4.98'fo  (Nyatoh) and maximum of 8.14%  (Palapi). Veneer ?welling from oven_-dry  to aiNlry  condition  varied between 2.lB'fo   (Nyatoh) and 8.60%  (Durian) with an avera.e-    2.81'-'.                                                                                             '7'1, bondi!JI atrerwth of _p_'f¥_~~     fro_~-~   woo4_?!!1!'*-? (76_'fo)  ti>ntOrms with the Indonaian ttandard for  type IIor ""*" rniatant,  6 wood specia  (62,6'fo) with Japanue standard and 4 specia  (60!1>) with German 1tandard?a:Peciflc ?fnJvlty   of  multiplex  ;.  higher than triplex.  Some. mechanical propertie? of multiple% are higher than
SIFAT PAPAN WOL KAYU DARI SEMBILAN-JENIS KAYU KALIMANTAN BARAT Sulastiningsih, I M; Memed, Rozak; Sutigno, Paribotro
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.1990.8.4.134-139

Abstract

The results of laboratory test of ioood-wool  board properties made /Tont nine wood species obtained from West Ka• limantan province are reported  in  this paper.  The properties tested were board density,  moisture eontent.. thickness reduction due to  compreuion  and bending strength.The study revealed that the averageyield of uiood-taoo!  was 365.4 kg per cubic meter of  log input. The wood-wool of Shorea smithiana Sym. must be soaked in cold water for 24 hours prior to manufacturing of uood-uoo;  board, whereaathe other apecieadid .not  require soaking.The  physical and mechanical properties of  uiood-wool boards made from  Bix wood apecies catalyzed either with CaCl2 solution or Ca(OH)2 BUBpenaion meet the DIN 1101 standard.

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