Discriminating the Indistinguishable Sapwood from Heartwood in Discoloured Ancient Wood by Direct Molecular Mapping of Specific Eztractives using TOF-SIMS
Introduction In dendrochronology, the felling date, which affects the construction date of architectures, can be estimated by using a statistical average number of sapwood rings only in woods having a recognizable sapwood/heartwood boundary. However, it could not be estimated in discoloured woods previously because of the indistinguishable sapwood. Normally, sapwood is visually discriminated from heartwood, the darker-coloured inner core. The darker colour of heartwood results from the accumulation of large amounts of extractives (1). Time-of-flight secondary ion mass spectrometry (TOF-SIMS) is a powerful technique that provides chemical information about the surface of a solid sample and does not need any chemical pretreatments. The significant advantage of TOF-SIMS over other techniques is imaging analysis, which allows the direct visualization of the chemical distribution on the sample surface with submicrometer spatial resolution, in this paper, we report a method that can discriminate the indistinguishable sapwood from heartwood in a discoloured ancient wood by the TOF-SIMS direct mapping of molecular ions of specific substances. The results allowed the determination of the felling date of the discoloured wood derived from a World Cultural Heritage site, the Horyuji Temple in Japan, which is the oldest surviving wooden building in the world.
Kaori Saito Takumi Mitsutani Takanori lmai Yasuyuki Matsushita Kazuhiko Fukushima
Graduate School of Bioagriculturai Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya,464-860 Nara National Research Institute for Cultural Properties, 2-9-1, Nijo-cho, Nara, 630-8577, Japan
国际会议
International Symposium on Wood Science and Technology(IAWPS 2008)(国际木材产品学会联合会2008学术研讨会)
哈尔滨
英文
319-320
2008-09-27（万方平台首次上网日期，不代表论文的发表时间）