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Jurnal Penelitian Hasil Hutan
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Articles 5 Documents
Search results for , issue " Vol 3, No 4 (1986): Jurnal Penelitian Hasil Hutan" : 5 Documents clear
CAMPURAN TERIGU DAN SAGU SEBAGAI EKSTENDER PEREKAT KAYU LAPIS Sumadiwangsa, Suwardi
Jurnal Penelitian Hasil Hutan Vol 3, No 4 (1986): 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.1986.3.4.9-12

Abstract

In  1983 Indonesian plywood    industries  consumed  about  45 000 tons  of  wheat flour  as an extender  of  ureaformaldehyde   adhesive. This material is imported from foreign  country,  although Indonesia,  as an agricultural country,  is rich with carbohydrate  resources such as palm trees.The result of a laboratory study on the effect of four wheat and sago flour  mixtures and four  levels of extender content on plywood  property is presented  in this paper.The mixtures of  wheat and sago flour  were 100/0, 80/20, 60/40, and 40/60. Each of them  was mixed  with the UF glue at four  different composition,   namely  I 5, 20, 25, and 30 percent  of each total glue weight.The experiment  was based on the 4 x 4 factorial  design  with. 4 replications.The result shows that the wheat and sago flour  mixture  does not significantly  affect  the glue shear as well as the wood failure.  The extender content on the other hand, affects significantly  the above properties,  in which higher extender content has resulted in lower plywood  quality.  The study  reveals also that all of the plywood  samples  tested conform  with the Indonesian  Standard  (Sil) for  plywood  type II.
ANATOMI DAN IDENTIFIKASI SEPULUH JENIS KAYU DARI KALIMANTAN TIMUR Mandang, Y I
Jurnal Penelitian Hasil Hutan Vol 3, No 4 (1986): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5571.723 KB) | DOI: 10.20886/jphh.1986.3.4.34 - 46

Abstract

The gross and anatomical features of ten wood species from Marangkayu Forest Area, East Kalimantan, were studied and docribed for identification purposes. Most of the samples observed had characters which matched the previous description of the species or genus. However, one sample, that is Lempung namit (Shorea leprosula Miq. ), showed characters that matched the previous description of the genus only but not the species.
ANATOMI DAN IDENTIFIKASI EMPAT BELAS JENIS KAYU DARI MALUKU Mandang, Y I
Jurnal Penelitian Hasil Hutan Vol 3, No 4 (1986): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (21854.078 KB) | DOI: 10.20886/jphh.1986.3.4.13-27

Abstract

General and anatomical features  of fourteen   wood species from Maluku  were observed and described for  identification  purposes.  Except for  Heritiera littoralis Dryand  and Tarrietia riedeliana Oliv.,  all wood species could be distinguished  one from   the others based on anatomical characters. A  tentative  identification  key is presented.
Fermentasi cair dua fase dan fermentasi padat eceng gondok Gusmailina, S Komarayati; Nurhayati, T; Wilde, B De; Vanhille, S
Jurnal Penelitian Hasil Hutan Vol 3, No 4 (1986): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3372.639 KB) | DOI: 10.20886/jphh.1986.3.4.28-33

Abstract

Tulisan ini menyajikan percobaan dua teknologi fermentasi biogas dari eceng gondok (Eichhornia crassipes). Fermentasi cair dengan dua phase menghasilkan 1 volume biogas per volume reaktor per hari dengan volume beban 4 kg bobot kering per meter kubik reaktor per hari dan pemakaian waktu 12,5 hari. Sedangkan fermentasi padat menghasilkan lebih banyak biogas, yaitu 3-4 volume biogas pe volume reaktor per hari dengan volume beban 15 kg bobot kering per meter kubik reaktor per hari dan pemakaian waktu 22 hari. Kedua teknologi ini memberikan produksi biogas yang lebih tinggi daripada sistem konvensional seperti batch, Gobar dan semi-kontinu. Terutama fermentasi padat memberi  harapan walaupun memerlukan praperlakuan eceng gondok secara intensif. Selain itu suhu merupakan factor penting. Pada suhu 350C (mesophilik); produksi gas lebih tinggi dibandingkan pada suhu ruang (22-280c). Fermentasi pada suhu mesophilik memungkinkan juga penambahan volume beban menjadi lebih tinggi.
SIFAT VENIR DAN KAYU LAPIS BEBERAPA JENIS KAYU INDONESIA Kliwon, Suwandi; Iskandar, M I; Sutigno, Paribotro
Jurnal Penelitian Hasil Hutan Vol 3, No 4 (1986): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (13552.353 KB) | DOI: 10.20886/jphh.1986.3.4.1-8

Abstract

This report  deals with peeling,  physical  and  mechanical properties  of  veneer and some physicai   and  mechanical properties  of  plywood (triply)  of  16 wood species from  East  Kalimantan  and  1 species from   West  Java.  The logs  of  all wood species tested could  be peeled  without heating or steaming.   Veneer of 0.9 mm  and 1.5 mm  in thickness  could be peeled  at cutting  angles between  89° and 92°.The yield  of green veneer was 46. 7%  and the average shrinkage  was 10. 7%  with a minimum   of  5.9% (jabon) and  maximum   of  13.9%  (merembung).   Thickness  swelling from  oven dry to air dry varied between 2. 7%  (medang tanduk)  and 3.9%(nyatoh)  with an average of 3.4%.The bonding strength  of plywood  made  of 5 wood species (29. 4%) was in complience  with the Indonesian  standard for  type  II  or water resistant,  11 wood species (64. 7%) with  Japanese  standard  and  6 species (35.3%) with German standard.The average thickness reduction  due to pressing  pressure  was 0.23 mm  with minimum  of 0. 07 mm (buah sayap)  and  maximum  of 0.44 mm (merant imerah).The specific gravity  of  wood used in this experiment  varied between 0.30  (merembung)  and 0. 80 (kapur).  The specific gravity  of plywood ranged from   0.46 (jabon) to 0.89 (medang tanduk).The  average values of  bending  strength  parallel  and perpendicular  to grain of  3 mm  triply  were 1221.29 kg/cm2   and  603.68 kg/cm2, respectively.  The tensile strength parallel and perpendicular  to grain were 625.95 kg/cm2  and 539.93 kg/cm2,  respectively.  The average values for bending strength parallel and perpendicular  to grain of 4 mm triply were  1096.31 kg/cm2  and 398.8 kg/cm2,   respectively.  The tensile  strengths parallel and perpendicular  to grain were 696.46 kg!/cm2  and 443.95 kg/cm2, and 443.95 kg/cm2.   respectively.

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