Gewang (Corypha utan Lamk.) is one of the endemic palm species which has been used as a building material for many years in Indonesia. The objective of this study was to enhance the overall resistance of gewang wood to biological deterioration by using smoke treatment. Samples taken from different parts of the trunks, namely bottom, middle, and upper parts in a longitudinal direction and outer and inner parts in a transversal direction, were exposed to the smoking process. Discoloration, dry-wood termite (Cryptotemes cynocephalus) and fungi (Schizophyllumcommune) resistance of smoked samples were determined according to the Indonesian standard. Based on the findings in this work, discoloration of smoked specimens was more prominent than that of the unsmoked samples. Overall termite and decay resistance of smoked samples were enhanced and higher than those of unsmoked samples without any influence of longitudinal and transversal orientations within the trunks. It appears that smoking can be considered as a potential method to improve decay and termite resistances of gewang wood.

中文翻译：

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葛旺木的变色和抗生物降解性评价

Gewang (Corypha utan Lamk.) 是一种特有的棕榈树种，在印度尼西亚已被用作建筑材料多年。本研究的目的是通过使用烟雾处理来增强格旺木材对生物退化的整体抵抗力。从树干的不同部分，即纵向的底部、中部和上部以及横向的外部和内部部分采集的样品暴露于吸烟过程。根据印度尼西亚标准测定烟熏样品的变色、干木白蚁（Cryptotemes cynocephalus）和真菌（Schizophyllumcommune）抗性。根据这项工作的发现，熏制样品的变色比未熏制的样品更显着。烟熏样品的整体抗白蚁和腐烂性得到增强并高于未烟熏样品，而不受树干内纵向和横向方向的任何影响。看来，吸烟可以被认为是提高格旺木材抗腐烂和抗白蚁性的一种潜在方法。