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INDONESIA
JURNAL SELULOSA
Published by Kementerian Perindustrian Republik Indonesia
ISSN : -     EISSN : -     DOI : -
Core Subject : Education,
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Jurnal Selulosa (JSel) is a journal that provides scientific information resources aimed at researchers and engineers in academia, research institutions, government agencies, and industries. Jurnal Selulosa publishes original research papers, review articles and case studies focused on cellulose, cellulose derivatives, pulp technology, paper technology, environment, biorefinery and other related topics. Formerly known as Berita Selulosa, and the first publication was in 1965. Since 2011, the journal renamed to Jurnal Selulosa.
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Search results for , issue "Vol 1, No 2 (1965): BERITA SELULOSA" : 1 Documents clear
PENGARUH PENJADAPAN TERHADAP KADAR SARI KAJU TUSAM (Pinus merkusii Jungh. et de Vriese) Soeprapti S.I Kaseno; Sri Margono
JURNAL SELULOSA Vol 1, No 2 (1965): BERITA SELULOSA
Publisher : Center for Pulp and Paper

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Abstract

The effect of tapping Pinus merkusii upon its extractive matters was studied.The extracttve matters were separated from the wood samples using a one to twomixture of alcohol and benzene in a Soxhlet apparatus.Three Pinus merkusii trees were studied, the first tree had been tapped for 3 months and was still being tapped when felled. The second tree had been tapped for 6 months and had afterwaids been left for 1/2 year before felling. The third tree has not been tapped.The effect of tapping was studied up to a height of 10 meters.The study reveals the following: wounding the tree stimulate the resin - yielding cell of the wood. Thus the formation of the extraneous materials in the tree increase.Samples taken from the tree which had been tapped and then left for 1/2 year before feling, showed a high extractive content, especially at regions near the face of the wound. It can be seen even with the naked eye, that this parts was heavily impregnated with resineous matters. The effect of the tapping upon the upper parts the tree above the wound was negligible.Samples taken from the tree which was still being tapped, showed a lower than average extractive content, for most of the resin was secreted as oleoresin.The presence of branching and knots within the trunk of the tree, showed a high extractive content in that part of the tree and a darker coloration of the wood.The infuence of tapping operation on other wood components was negligible.

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