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- W2298291245 abstract "Ozonation method was applied to survey the effect of milling on the structural change of lignin during the MWL preparation process. Ozonation analysis of milled wood demonstrated that both the content of β-O-4 structure and its diastereomer ratio (erythro/threo (E/T) ratio) decreased with the progress of milling. This result suggested that the erythro β-O-4 structures are more frequently degraded than the threo one during the milling. To express the effect of milling condition on the structural change of lignin quantitatively, new concept 'extractable lignin' was introduced as a quantitative measure of milling effect. 'Extractable lignin' is the amount of lignin extractable by 96% aqueous dioxane from milled wood. By the employment of this concept, it was found that lignin undergoes the same degree of structural change when woods are milled to the same extent regardless of the difference of milling condition. Under any milling condition, about 20 to 25 % of β-O-4 structure was estimated to be lost when milling was conducted until about 30 % of lignin became extractable by 96% aqueous dioxane. Thus, it is concluded that lignin in milled wood has already undergone severe structural modification when it is obtained as MWL." @default.
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- W2298291245 date "2005-01-01" @default.
- W2298291245 modified "2023-09-23" @default.
- W2298291245 title "Effect of the Milling Atmosphere on Lignin Structure in Wood" @default.
- W2298291245 hasPublicationYear "2005" @default.
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