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Search results for , issue "Vol 19, No 2 (2001): Buletin Penelitian Hasil Hutan" : 4 Documents clear
PENGARUH JENIS PELARUT DAN KUALITAS DAMAR TERHADAP RENDEMEN DAN SIFAT FISIKO-KIMIA DAMAR YANG DIMURNIKAN Wiyono, Bambang; Silitonga, Toga
Jurnal Penelitian Hasil Hutan Vol 19, No 2 (2001): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3970.347 KB) | DOI: 10.20886/jphh.2001.19.2.103-115

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh jenis pelarut dan kualitas damar terhadap rendemen dan sifat fisiko-kimia damar yang dimurnikan, sedangkan sasarannya adalah untuk mencari pelarut organik yang dapat digunakan untuk memurnikan damar mata kucing dengan tetap memperhatikan kualitas damar yang dihasilkan.Berbagai kualitas damar mata kucing dimurnikan dengan menggunakan pelarut organik, kemudian dianalisis sifat fisiko-kimianya. Pengaruh jenis pelarut dan kualitas damar terhadap rendemen dan sifat fisiko-kimia damar yang dimurnikan dianalisis dengan rancangan faktorial A X B dengan 2 kali ulangan. Faktor perlakuan A merupakan jenis pelarut yang terdiri dari benzena, toluena dan tanpa perlakuan, sedangkan faktor B adalah kualitas  damar mata kucing yang terdiri dari kualitas A, B, C, D dan kualitas E. Perbedaan nilai rataan antar perlakuan dianalisis dengan metode Duncan.Hasil penelitian menunjukkan bahwa jenis pelarut organik dan kualitas damar mata kucing berpengaruh sangat nyata terhadap bilangan asant, bilangan iod, kadar abu dan kadar bahan tak larut dalam toluena, dan berpengaruh nyata terhadap bilangan penyabunan damar yang telah dimurnikan. Pemurnian damar mata kucing dengan menggunakan pelarut benzena menghasilkan sifat fisiko-kimia yang lebih baik dibandingkan dengan pelarut toluena. Berdasarkan persyaratan bilangan asam dan kadar bahan tak larut dalam toluena menurut SNI, pemurnian damar dengan pelarut organik mampu menaikkan kualitasnya. Kualitas damar mata kucing dari kualitas E menjadi damar kualitas D, sedangkan damar kualitas C dan B meningkat kualitasnya menjadi damar kualitas A. Pemurnian damar dengan pelarut organik dapat meningkatkan kualitasnya dan damar dapat dibentuk sesuai dengan kebutuhan yang memudahkan dalam pengiriman ke luar negeri.
ANATOMICAL PROPERTIES OF FIVE MAJOR WOOD SPECIES CROWN IN JAMBI, SUMATERA Mandang, Y I; Krisdianto, Krisdianto
Jurnal Penelitian Hasil Hutan Vol 19, No 2 (2001): 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.2001.19.2.117-136

Abstract

General characteristics and anatomical properties of several major wood species in Jambi, Sumatera, have been studied. The purpose is to find out their characters for identification, their appropriate uses and their possibilities to be widely cultivated. Five major wood species have been identified and described: balam (Palaquium gutta Bail.), bayur (Pterospermum diversifolium BI.), medang (Litsea sp.), mahang (Macaranga pruinosa Muell.Arg.) and merkubung (Mac.-ranga gigantea Muell.Arg.). Balam and bayur are suitable for house construction, plywood, furniture: and their fibres are fairly good for pulp. Therefore balam and bayur are highly recommended to be widely cultivated. Mahang and merkubung are too light and soft for construction purposes where strength properties are of prime importance. However mahang and merkubung fibres are of good quality so they still can be recommended to be widely cultivated for pulp source. Medang is fairly appropriate for construction purposes and having fairly good quality fibres as well. However the occurrence of oil cells inside wood tissue and the possible effect of the exudate on gluability and paintability, have to be considered before decision is made for its cultivation in large quantities.
KLASIFIKASI KERUSAKAN TEGAKAN TINGGAL, EROSI TANAH HUTAN DAN IKLIM MIKRO UNTUK PENETAPAN AMBANG BATAS DALAM PEMANENAN TEBANG PILIH DI HUTAN ALAM Endom, Wesman; Basari, Zakaria
Jurnal Penelitian Hasil Hutan Vol 19, No 2 (2001): 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.2001.19.2.69-88

Abstract

The logging impact on wood harvesting operation at natural forest is an important element that should be pay attention by all people to get sustainable forest management. This information is needed in order the forest damaged can be maintained to achieve health forest recovery of the togged forest area and high potency, so we can do the next harvest with a similar volume and quality or even more. That is our hope and sustain continuously.To achieve this, the criteria and size of threshold forest damages is required. There is 3 main group of damages to be known i.e. threshold of residual stand damage, threshold of forest soil damage and threshold of micro climate.Based on consideration that in the reality in general was found logging impact still high so because globally in the world asking logging with friendly it is essential to provide a limit of forest damage. Some activities that may produce heavy forest damage was road construction, felling, skidding and log yard establishment.
PENGARUH LAMA PENYULINGAN SECARA KERING PADA KONDISI VAKUM TERHADAP RENDEMEN DAN SIFAT FISIKO-KIMIA RESIDU DAMAR MATA KUCING Wiyono, Bambang; Sofyan, Kurnia; Kurniasih, Dedeh; Hastoeti, Poedji
Jurnal Penelitian Hasil Hutan Vol 19, No 2 (2001): 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.2001.19.2.89-101

Abstract

Dammar resin of Shorea javanica which its essential oil has been isolated can still be used for industrial purposes. Relating to this, the objective of the research is to investigate the effect of a vacuum dry distillation time on yield and the physico-chemical properties of dammar residue.A vacuum dry distillation technique of dammar was carried out at a pressure of 0.06 Pa, a temperature of 65 - 85°C for 0.5, 1, 1.5, 2, and 2.5 hours, respectively. Each of distilling times was triplicated. To see the effect of distilling time on the yield and properties of dammar residue, the data were analysed by a factorial completely randomized design procedure, and their different means values were tested with Tukey's procedure. The relationship between distilling time and the yield or its physico-chemical properties of dammar residue was analysed with a polynomial orthogonal regression in a SAS package.The results showed that distilling time gave a highly significant effect on yield, softening point, ash content, iod number, acid number and saponification number of dammar residue, except for unsoluble matter in toluene. The increase in distilling lime tent to decrease in the yield and acid number of dammar residue, but it also tent to increase in softening point, ash content, iod number, saponification number and unsoluble matter in toluene. Moreover, distilling time of 2.5 hours is the optimum time to give the highest values of softening point and iod number, but with the lowest value of acid number. Polynomial orthogonal analysis revealed that there were relationship between distilling lime and yield of dammar residue and its properties with a highly significance.Compared to Indonesian National Standard for dammar, dammar residue has not met the requirement for softening point, acid number and ash content criteria. To meet the requirement, it was suggested to increase the pressure in the vacuum dry distillation process with a proper condentation for this pressure.

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