Coloring mechanisms of ancient buried wood: Japanese cedar trees excavated from the foothills of Mt. Chokai

Autor: Yasuji Kurimoto, Shigeru Yamauchi, Tsutomu Takayama, Yoichi Sakai
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Journal of Wood Science, Vol 66, Iss 1, Pp 1-6 (2020)
Druh dokumentu: article
ISSN: 1435-0211
1611-4663
DOI: 10.1186/s10086-020-01870-7
Popis: Abstract Spectroscopic characterization of ancient buried Japanese cedar (Cryptomeria japonica) woods excavated from the foothills of Mt. Chokai was carried out to investigate the factors governing their color tones. X-ray fluorescence analysis confirmed primary metal elements in the Japanese cedar wood to be Ca and Fe. Infrared photoacoustic spectroscopy revealed that prolonged burial had not caused severe chemical decomposition of the ancient wood. 57Fe Mössbauer spectra of the ancient wood samples suggested that Fe in the Japanese cedar wood was present in the high-spin Fe3+ or low-spin Fe2+ state. Although the dark color tone of the ancient wood has been assumed to be due to the presence of multinuclear Fe complexes with multidentate ligands such as tannin, no positive correlation was observed between the color depth and Fe content of the ancient wood samples.
Databáze: Directory of Open Access Journals
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