木質材料　針葉樹材のニオイが随伴性陰性変動（ＣＮＶ）に及ぼす影響

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  • Special Issue on Wood and Wood-Based Materials. Effect of Odors from Coniferous Woods on Contingent Negative Variation(CNV).
  • シンヨウジュザイ ノ ニオイ ガ ズイバンセイ インセイ ヘンドウ CNV ニ

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In order to clarify the effect of odors of seven coniferous woods on human, contingent negative variation (CNV) and electroencephalogram (EEG) were measured. Four of the species used, hinoki (Chamaecyparis obtusa), sugi (Cryptomeria japonica), akamatsu (Pinus densiflora), and hiba (Thujopsis dolabrata var. hondai), were grown in Japan, and three of them, Alaska cedar (Chamaecyparis nootkatensis), Douglas fir (Pseudotsuga menziesii), and western red cedar (Thuja plicata), were grown in the United States. The concentrations of their wood odors were analysed by gas-liquid chromatography. The total concentration of monoterpene hydrocarbon in the wood odors was held to less than 3ppb.<br>The amplitudes of early components of CNV and the α/β wave ratio of EEG at the frontal (Fz) and central (Cz) regions between in the presence and absence of wood odors were compared. 5 male and 5 female volunteers ranging in age from 20 to 26 were examinated. The result obtained are summerized as follows:<br>(1) In the presence of wood odors, the early CNV amplitudes at Fz decreased at a statistical level of significance of 5% or better.<br>(2) The α/β wave ratio of EEG increased significantly at Cz with hiba wood odor (p<0.01).<br>(3) The decrease of the early CNV amplitude at Fz is related to the concentration of α-pinene in the wood odors.

収録刊行物

  • 材料

    材料 45 (4), 397-402, 1996

    公益社団法人 日本材料学会

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