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Poedji Hastoeti
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PENGARUH PERLAKUAN PENDAHULUAN BIJI KEMIRI TERHADAP RENDEMEN DAN SIFAT MINYAKNYA (Pretreatment effects of candle nut seedoil on oil yiled and its properties) Bambang Wiyono; Poedji Hastoeti
Jurnal Penelitian Hasil Hutan Vol 11, No 5 (1993): 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.1993.11.5.174-178

Abstract

The purpose of this research is to study the pretreatment effects of candle nut seed oil on oil yield and its properties. Pretreatments consisted of dry-frying steaming and unpretreatment. The dry-frying was carried out at 100°C for 15 minutes, and steaming was carried out for 30 minutes at the same temperature. Each pretreatment was pressed at 110 kg/cm2 and the difference between means were tested with the LSD procedure.The results showed that pretreatment gave a highly significant effect on oil yield, specific gravity, saponification number and unsaponifiable matter. It also provided a significant effect on acid number and acid content caloulated as oleic acid. The dry-frying produced the highest of oil yield, a higher specific gravity, and a lower acid number, acid content and unsaponifiable matter based on the oil yield, specific gravity and acid number, the dry-frying method is the best pretreatment compared to the others.
ANALISIS KIMIA KAYU NANGKA (Artocarpus heterophyllus lamk) DARI JAWA BARAT (chemical analysis of jackfruit wood from west java) Sri Komarayati; Poedji Hastoeti
Jurnal Penelitian Hasil Hutan Vol 11, No 8 (1993): 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.1993.11.8.326-328

Abstract

Jackfruit plant (artocarpus heterophyllus lamk) is know as multipurpose tree. A chemical analysis of jackfruit wood from west java has been conducted to determine the contents of cellulose, lignin, pentosan,ash,silica and solubility in cold water, hot water, one percent sodium hydroxide and alcohol-benzene (1:2).The results showed that cellulose content 56,47 percent, lignin 28,76 percent, pentosan 18,64 percent, ash 0,78 percent, and silica 0,37 percent. Thesolubility in cold water 12.29 percent, hot water 14,41 percent, one percent sodium hydroxide 24,70 percent, and solubility in alcohol-benzene (1:2) 10,78 percent.
PENYULlNGAN KULIT MASOI (Cinnamomum zanthoneuron BL.) BAGIAN II (Distillation of Maosi bark (Cinnamomum xanthoneuron BL.,). PART II) SIFAT FISIKO KIMIA MINYAK KULlT MASOI BASIL PENYULINGAN CARA KOHOBASI Bambang Wiyonot; Abdul Hakim Lukman; Poedji Hastoeti
Jurnal Penelitian Hasil Hutan Vol 10, No 1 (1992): 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.1992.10.1.12-15

Abstract

The purpose  of  this  research  is to study   the  physico    chemical properties  of oil produced   from hydrodistillation  of  massoi bark.  The  distillation period  were  varied  from   12  to 18,  2 4,  30,  and  30 and 36 hours,The result  indicates  that  distillation  r appears  to have highly significant ,  affect  on oil yield and acid number  as shown   by  linear regresison  of  respectively  Y =  2.132  +  0. 350 X  (r = 0. 943)   for  oil  yield   and  Y  =  3.598   + 0.219  X (r  =  0.977)  for  acid  number.  Besides  that  massoi   bark oil from  Maluku has higher eugenol  content composed   with  that from  lriqn  and  West Australia. 
PENELAAHAN DIMENSI SERAT DAN KOMPOSISI KIMIA KAYU KAPOK (Ceiba pentandra Gaerth) Setyani B Lestari; Poedji Hastoeti
Jurnal Penelitian Hasil Hutan Vol 18, No 2 (2000): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2000.18.2.105-110

Abstract

Penyelidikan dimensi serat dan komposisi kimia kayu telah dilaksanakan guna mengkaji kemungkinan pemanfaatannya sebagai bahan baku pembuatan pulp dan kertas. Contoh kayu kapok dimaksud diambil dari bagian batang dan cabang pohon kapok yang tumbuh di daerah Bogor.Dari hasil pengkajian terdapat petunjuk bahwa tidak terdapat perbedaan nyata dalam hal sifat dimensi serat dan komposisi kimia kayu kapok, baik yang berasal dari bagian batang ataupun cabang pohonnya.Dalam hal dimensi serat dan nilai turunannya, bagian batang dan cabang pohon kapok dapat digolongkan pada standar kualitas kelas III. Sedangkau dalam hal komposisi kimia kayu dari bagian batang dan cabang pohon kapok termasuk golongan kualitas mulai dari selang mutu rendah sampai tinggi. Hasil pengkajian lebih lanjut memberi petunjuk bahwa kayu dari bagian batang dan cabang tersebut cukup sesuai sebagai bahan baku pulp dan kertas. Akan tetapi, kandungan ekstraktifnya yang tinggi perlu dipertimbangkan karena ha! ini bisa mempengaruhi proses pengolahan pulp dan juga mutu hasilnya sendiri.
Co-Authors Abdul Hakim Lukman Bambang Wiyono Bambang Wiyonot Chilwan Panji Dedeh Kurniasih Kurnia Sofyan P J Jordan Setyani B Lestari Silvia Silvia Sri Komarayati